GUARANTORS OF SECURITIES (Condensed Balance Sheet) (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Jun. 30, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Dec. 31, 2016 |
Current assets: |
|
|
|
|
|
|
|
|
Cash and cash equivalents |
$ 47,631
|
[1] |
|
$ 13,583
|
[1] |
$ 26,896
|
|
$ 26,950
|
Receivables: |
|
|
|
|
|
|
|
|
Trade, operating, net of allowance for doubtful accounts of $854 |
35,655
|
|
|
33,840
|
|
|
|
|
Trade, dry-leasing |
3,833
|
|
|
5,124
|
|
|
|
|
Tax receivables |
3,117
|
|
|
2,829
|
|
|
|
|
Other |
2,701
|
|
|
1,623
|
|
|
|
|
Inventories, net |
20,157
|
|
|
21,112
|
|
|
|
|
Prepaid expenses |
2,367
|
|
|
1,203
|
|
|
|
|
Escrow deposits |
|
|
|
3,250
|
|
|
|
|
Total current assets |
115,461
|
|
|
82,564
|
|
|
|
|
Property and equipment |
927,477
|
|
|
972,942
|
|
|
|
|
Accumulated depreciation |
(314,736)
|
|
|
(299,028)
|
|
|
|
|
Property and equipment, net |
612,741
|
|
|
673,914
|
|
|
|
|
Equity investments and advances |
26,600
|
|
|
30,056
|
|
|
|
|
Investments in consolidated subsidiaries |
0
|
|
|
0
|
|
|
|
|
Intangible assets |
1,111
|
|
|
1,122
|
|
|
|
|
Deferred income taxes |
0
|
|
|
0
|
|
|
|
|
Intercompany receivables |
0
|
|
|
0
|
|
|
|
|
Other assets |
18,421
|
|
|
4,441
|
|
|
|
|
Total assets |
774,334
|
|
|
792,097
|
|
|
|
|
Current liabilities: |
|
|
|
|
|
|
|
|
Accounts payable and accrued expenses |
10,438
|
|
|
16,421
|
|
|
|
|
Accrued wages and benefits |
8,605
|
|
|
8,264
|
|
|
|
|
Accrued interest |
3,404
|
|
|
606
|
|
|
|
|
Accrued income taxes |
2,993
|
|
|
28
|
|
|
|
|
Accrued other taxes |
2,396
|
|
|
1,810
|
|
|
|
|
Accrued contingencies |
1,014
|
|
|
859
|
|
|
|
|
Current portion of long-term debt |
2,158
|
|
|
2,736
|
|
|
|
|
Other current liabilities |
1,033
|
|
|
1,720
|
|
|
|
|
Total current liabilities |
32,041
|
|
|
32,444
|
|
|
|
|
Long-term debt (including $0 and $1,903 from VIEs in 2018 and 2017, respectively) |
160,476
|
|
|
202,174
|
|
|
|
|
Deferred income taxes |
108,138
|
|
|
106,598
|
|
|
|
|
Intercompany payables |
0
|
|
|
0
|
|
|
|
|
Other liabilities |
1,753
|
|
|
1,434
|
|
|
|
|
Total liabilities |
302,408
|
|
|
342,650
|
|
|
|
|
Redeemable noncontrolling interest |
3,456
|
|
$ 3,466
|
3,766
|
|
4,002
|
$ 3,769
|
4,221
|
Equity: |
|
|
|
|
|
|
|
|
Common stock, $0.01 par value, 60,000,000 shares authorized; 21,763,250 and 21,319,150 outstanding in 2018 and 2017, respectively, exclusive of treasury shares |
219
|
|
|
215
|
|
|
|
|
Additional paid-in capital |
447,013
|
|
|
443,944
|
|
|
|
|
Retained earnings |
24,079
|
|
|
4,363
|
|
|
|
|
Treasury shares, at cost; 215,141 shares in 2018 and 2017 |
(2,951)
|
|
|
(2,951)
|
|
|
|
|
Accumulated other comprehensive income, net of tax |
110
|
|
|
110
|
|
|
|
|
Total equity |
468,470
|
|
$ 436,048
|
445,681
|
|
$ 382,948
|
$ 463,049
|
$ 468,417
|
Total liabilities, redeemable noncontrolling interest and stockholders’ equity |
774,334
|
|
|
792,097
|
|
|
|
|
Reportable Legal Entities | Parent |
|
|
|
|
|
|
|
|
Current assets: |
|
|
|
|
|
|
|
|
Cash and cash equivalents |
46,351
|
|
|
|
|
|
|
|
Receivables: |
|
|
|
|
|
|
|
|
Trade, operating, net of allowance for doubtful accounts of $854 |
0
|
|
|
0
|
|
|
|
|
Trade, dry-leasing |
0
|
|
|
0
|
|
|
|
|
Tax receivables |
0
|
|
|
0
|
|
|
|
|
Other |
0
|
|
|
0
|
|
|
|
|
Inventories, net |
0
|
|
|
0
|
|
|
|
|
Prepaid expenses |
501
|
|
|
349
|
|
|
|
|
Escrow deposits |
|
|
|
0
|
|
|
|
|
Total current assets |
46,852
|
|
|
11,149
|
|
|
|
|
Property and equipment |
0
|
|
|
0
|
|
|
|
|
Accumulated depreciation |
0
|
|
|
0
|
|
|
|
|
Property and equipment, net |
0
|
|
|
0
|
|
|
|
|
Equity investments and advances |
0
|
|
|
0
|
|
|
|
|
Investments in consolidated subsidiaries |
165,005
|
|
|
161,350
|
|
|
|
|
Intangible assets |
0
|
|
|
0
|
|
|
|
|
Deferred income taxes |
21,185
|
|
|
19,600
|
|
|
|
|
Intercompany receivables |
375,131
|
|
|
426,806
|
|
|
|
|
Other assets |
1,398
|
|
|
1,011
|
|
|
|
|
Total assets |
609,571
|
|
|
619,916
|
|
|
|
|
Current liabilities: |
|
|
|
|
|
|
|
|
Accounts payable and accrued expenses |
130
|
|
|
638
|
|
|
|
|
Accrued wages and benefits |
0
|
|
|
0
|
|
|
|
|
Accrued interest |
3,337
|
|
|
549
|
|
|
|
|
Accrued income taxes |
2,970
|
|
|
0
|
|
|
|
|
Accrued other taxes |
244
|
|
|
18
|
|
|
|
|
Accrued contingencies |
0
|
|
|
0
|
|
|
|
|
Current portion of long-term debt |
0
|
|
|
0
|
|
|
|
|
Other current liabilities |
817
|
|
|
848
|
|
|
|
|
Total current liabilities |
7,498
|
|
|
2,053
|
|
|
|
|
Long-term debt (including $0 and $1,903 from VIEs in 2018 and 2017, respectively) |
133,743
|
|
|
172,292
|
|
|
|
|
Deferred income taxes |
0
|
|
|
0
|
|
|
|
|
Intercompany payables |
0
|
|
|
0
|
|
|
|
|
Other liabilities |
0
|
|
|
0
|
|
|
|
|
Total liabilities |
141,241
|
|
|
174,345
|
|
|
|
|
Redeemable noncontrolling interest |
0
|
|
|
0
|
|
|
|
|
Equity: |
|
|
|
|
|
|
|
|
Common stock, $0.01 par value, 60,000,000 shares authorized; 21,763,250 and 21,319,150 outstanding in 2018 and 2017, respectively, exclusive of treasury shares |
219
|
|
|
215
|
|
|
|
|
Additional paid-in capital |
447,014
|
|
|
443,944
|
|
|
|
|
Retained earnings |
24,048
|
|
|
4,363
|
|
|
|
|
Treasury shares, at cost; 215,141 shares in 2018 and 2017 |
(2,951)
|
|
|
(2,951)
|
|
|
|
|
Accumulated other comprehensive income, net of tax |
|
|
|
0
|
|
|
|
|
Total equity |
468,330
|
|
|
445,571
|
|
|
|
|
Total liabilities, redeemable noncontrolling interest and stockholders’ equity |
609,571
|
|
|
619,916
|
|
|
|
|
Reportable Legal Entities | Guarantors |
|
|
|
|
|
|
|
|
Current assets: |
|
|
|
|
|
|
|
|
Cash and cash equivalents |
0
|
|
|
0
|
|
|
|
|
Receivables: |
|
|
|
|
|
|
|
|
Trade, operating, net of allowance for doubtful accounts of $854 |
29,135
|
|
|
27,968
|
|
|
|
|
Trade, dry-leasing |
3,833
|
|
|
5,124
|
|
|
|
|
Tax receivables |
0
|
|
|
0
|
|
|
|
|
Other |
2,154
|
|
|
1,126
|
|
|
|
|
Inventories, net |
20,124
|
|
|
20,746
|
|
|
|
|
Prepaid expenses |
1,560
|
|
|
721
|
|
|
|
|
Escrow deposits |
|
|
|
3,250
|
|
|
|
|
Total current assets |
56,806
|
|
|
58,935
|
|
|
|
|
Property and equipment |
910,730
|
|
|
956,918
|
|
|
|
|
Accumulated depreciation |
(311,342)
|
|
|
(296,573)
|
|
|
|
|
Property and equipment, net |
599,388
|
|
|
660,345
|
|
|
|
|
Equity investments and advances |
26,600
|
|
|
30,056
|
|
|
|
|
Investments in consolidated subsidiaries |
0
|
|
|
0
|
|
|
|
|
Intangible assets |
0
|
|
|
0
|
|
|
|
|
Deferred income taxes |
0
|
|
|
0
|
|
|
|
|
Intercompany receivables |
0
|
|
|
0
|
|
|
|
|
Other assets |
16,939
|
|
|
3,370
|
|
|
|
|
Total assets |
699,733
|
|
|
752,706
|
|
|
|
|
Current liabilities: |
|
|
|
|
|
|
|
|
Accounts payable and accrued expenses |
8,606
|
|
|
13,655
|
|
|
|
|
Accrued wages and benefits |
7,008
|
|
|
6,804
|
|
|
|
|
Accrued interest |
67
|
|
|
57
|
|
|
|
|
Accrued income taxes |
0
|
|
|
24
|
|
|
|
|
Accrued other taxes |
1,791
|
|
|
1,192
|
|
|
|
|
Accrued contingencies |
0
|
|
|
0
|
|
|
|
|
Current portion of long-term debt |
1,663
|
|
|
1,663
|
|
|
|
|
Other current liabilities |
199
|
|
|
835
|
|
|
|
|
Total current liabilities |
19,334
|
|
|
24,230
|
|
|
|
|
Long-term debt (including $0 and $1,903 from VIEs in 2018 and 2017, respectively) |
26,733
|
|
|
27,979
|
|
|
|
|
Deferred income taxes |
128,073
|
|
|
124,948
|
|
|
|
|
Intercompany payables |
322,117
|
|
|
381,660
|
|
|
|
|
Other liabilities |
1,753
|
|
|
1,435
|
|
|
|
|
Total liabilities |
498,010
|
|
|
560,252
|
|
|
|
|
Redeemable noncontrolling interest |
3
|
|
|
4
|
|
|
|
|
Equity: |
|
|
|
|
|
|
|
|
Common stock, $0.01 par value, 60,000,000 shares authorized; 21,763,250 and 21,319,150 outstanding in 2018 and 2017, respectively, exclusive of treasury shares |
0
|
|
|
0
|
|
|
|
|
Additional paid-in capital |
100,305
|
|
|
100,306
|
|
|
|
|
Retained earnings |
101,305
|
|
|
92,034
|
|
|
|
|
Treasury shares, at cost; 215,141 shares in 2018 and 2017 |
0
|
|
|
0
|
|
|
|
|
Accumulated other comprehensive income, net of tax |
110
|
|
|
110
|
|
|
|
|
Total equity |
201,720
|
|
|
192,450
|
|
|
|
|
Total liabilities, redeemable noncontrolling interest and stockholders’ equity |
699,733
|
|
|
752,706
|
|
|
|
|
Reportable Legal Entities | Non-guarantors |
|
|
|
|
|
|
|
|
Current assets: |
|
|
|
|
|
|
|
|
Cash and cash equivalents |
1,280
|
|
|
|
|
|
|
|
Receivables: |
|
|
|
|
|
|
|
|
Trade, operating, net of allowance for doubtful accounts of $854 |
6,520
|
|
|
5,872
|
|
|
|
|
Trade, dry-leasing |
0
|
|
|
0
|
|
|
|
|
Tax receivables |
3,117
|
|
|
2,829
|
|
|
|
|
Other |
547
|
|
|
497
|
|
|
|
|
Inventories, net |
33
|
|
|
366
|
|
|
|
|
Prepaid expenses |
306
|
|
|
133
|
|
|
|
|
Escrow deposits |
|
|
|
0
|
|
|
|
|
Total current assets |
11,803
|
|
|
12,480
|
|
|
|
|
Property and equipment |
16,747
|
|
|
16,024
|
|
|
|
|
Accumulated depreciation |
(3,394)
|
|
|
(2,455)
|
|
|
|
|
Property and equipment, net |
13,353
|
|
|
13,569
|
|
|
|
|
Equity investments and advances |
0
|
|
|
0
|
|
|
|
|
Investments in consolidated subsidiaries |
0
|
|
|
0
|
|
|
|
|
Intangible assets |
1,111
|
|
|
1,122
|
|
|
|
|
Deferred income taxes |
0
|
|
|
0
|
|
|
|
|
Intercompany receivables |
0
|
|
|
0
|
|
|
|
|
Other assets |
84
|
|
|
60
|
|
|
|
|
Total assets |
26,351
|
|
|
27,231
|
|
|
|
|
Current liabilities: |
|
|
|
|
|
|
|
|
Accounts payable and accrued expenses |
1,702
|
|
|
2,128
|
|
|
|
|
Accrued wages and benefits |
1,597
|
|
|
1,460
|
|
|
|
|
Accrued interest |
0
|
|
|
0
|
|
|
|
|
Accrued income taxes |
23
|
|
|
4
|
|
|
|
|
Accrued other taxes |
361
|
|
|
600
|
|
|
|
|
Accrued contingencies |
1,014
|
|
|
859
|
|
|
|
|
Current portion of long-term debt |
495
|
|
|
1,073
|
|
|
|
|
Other current liabilities |
17
|
|
|
37
|
|
|
|
|
Total current liabilities |
5,209
|
|
|
6,161
|
|
|
|
|
Long-term debt (including $0 and $1,903 from VIEs in 2018 and 2017, respectively) |
0
|
|
|
1,903
|
|
|
|
|
Deferred income taxes |
1,250
|
|
|
1,250
|
|
|
|
|
Intercompany payables |
53,047
|
|
|
45,146
|
|
|
|
|
Other liabilities |
0
|
|
|
(1)
|
|
|
|
|
Total liabilities |
59,506
|
|
|
54,459
|
|
|
|
|
Redeemable noncontrolling interest |
3,453
|
|
|
3,762
|
|
|
|
|
Equity: |
|
|
|
|
|
|
|
|
Common stock, $0.01 par value, 60,000,000 shares authorized; 21,763,250 and 21,319,150 outstanding in 2018 and 2017, respectively, exclusive of treasury shares |
0
|
|
|
0
|
|
|
|
|
Additional paid-in capital |
4,562
|
|
|
4,562
|
|
|
|
|
Retained earnings |
(41,170)
|
|
|
(35,552)
|
|
|
|
|
Treasury shares, at cost; 215,141 shares in 2018 and 2017 |
0
|
|
|
0
|
|
|
|
|
Accumulated other comprehensive income, net of tax |
0
|
|
|
0
|
|
|
|
|
Total equity |
(36,608)
|
|
|
(30,990)
|
|
|
|
|
Total liabilities, redeemable noncontrolling interest and stockholders’ equity |
26,351
|
|
|
27,231
|
|
|
|
|
Eliminations |
|
|
|
|
|
|
|
|
Current assets: |
|
|
|
|
|
|
|
|
Cash and cash equivalents |
0
|
|
|
|
|
|
|
|
Receivables: |
|
|
|
|
|
|
|
|
Trade, operating, net of allowance for doubtful accounts of $854 |
0
|
|
|
0
|
|
|
|
|
Trade, dry-leasing |
0
|
|
|
0
|
|
|
|
|
Tax receivables |
0
|
|
|
0
|
|
|
|
|
Other |
0
|
|
|
0
|
|
|
|
|
Inventories, net |
0
|
|
|
0
|
|
|
|
|
Prepaid expenses |
0
|
|
|
0
|
|
|
|
|
Escrow deposits |
|
|
|
0
|
|
|
|
|
Total current assets |
0
|
|
|
0
|
|
|
|
|
Property and equipment |
0
|
|
|
0
|
|
|
|
|
Accumulated depreciation |
0
|
|
|
0
|
|
|
|
|
Property and equipment, net |
0
|
|
|
0
|
|
|
|
|
Equity investments and advances |
0
|
|
|
0
|
|
|
|
|
Investments in consolidated subsidiaries |
(165,005)
|
|
|
(161,350)
|
|
|
|
|
Intangible assets |
0
|
|
|
0
|
|
|
|
|
Deferred income taxes |
(21,185)
|
|
|
(19,600)
|
|
|
|
|
Intercompany receivables |
(375,131)
|
|
|
(426,806)
|
|
|
|
|
Other assets |
0
|
|
|
0
|
|
|
|
|
Total assets |
(561,321)
|
|
|
(607,756)
|
|
|
|
|
Current liabilities: |
|
|
|
|
|
|
|
|
Accounts payable and accrued expenses |
0
|
|
|
0
|
|
|
|
|
Accrued wages and benefits |
0
|
|
|
0
|
|
|
|
|
Accrued interest |
0
|
|
|
0
|
|
|
|
|
Accrued income taxes |
0
|
|
|
0
|
|
|
|
|
Accrued other taxes |
0
|
|
|
0
|
|
|
|
|
Accrued contingencies |
0
|
|
|
0
|
|
|
|
|
Current portion of long-term debt |
0
|
|
|
0
|
|
|
|
|
Other current liabilities |
0
|
|
|
0
|
|
|
|
|
Total current liabilities |
0
|
|
|
0
|
|
|
|
|
Long-term debt (including $0 and $1,903 from VIEs in 2018 and 2017, respectively) |
0
|
|
|
0
|
|
|
|
|
Deferred income taxes |
(21,185)
|
|
|
(19,600)
|
|
|
|
|
Intercompany payables |
(375,164)
|
|
|
(426,806)
|
|
|
|
|
Other liabilities |
0
|
|
|
0
|
|
|
|
|
Total liabilities |
(396,349)
|
|
|
(446,406)
|
|
|
|
|
Redeemable noncontrolling interest |
0
|
|
|
0
|
|
|
|
|
Equity: |
|
|
|
|
|
|
|
|
Common stock, $0.01 par value, 60,000,000 shares authorized; 21,763,250 and 21,319,150 outstanding in 2018 and 2017, respectively, exclusive of treasury shares |
0
|
|
|
0
|
|
|
|
|
Additional paid-in capital |
(104,868)
|
|
|
(104,868)
|
|
|
|
|
Retained earnings |
(60,104)
|
|
|
(56,482)
|
|
|
|
|
Treasury shares, at cost; 215,141 shares in 2018 and 2017 |
0
|
|
|
0
|
|
|
|
|
Accumulated other comprehensive income, net of tax |
0
|
|
|
0
|
|
|
|
|
Total equity |
(164,972)
|
|
|
(161,350)
|
|
|
|
|
Total liabilities, redeemable noncontrolling interest and stockholders’ equity |
$ (561,321)
|
|
|
$ (607,756)
|
|
|
|
|
|
|