GUARANTORS OF SECURITIES Supplemental Condensed Consolidating Statements of Cash Flows (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Condensed Cash Flow Statements, Captions [Line Items] |
|
|
|
| Net cash provided by operating activities |
$ 58,504
|
$ 44,456
|
$ 78,286
|
| Cash flows from investing activities: |
|
|
|
| Purchases of property and equipment |
(39,200)
|
(60,050)
|
(106,732)
|
| Proceeds from disposition of property and equipment |
28,609
|
25,328
|
7,051
|
| Cash settlements on forward contracts, net |
0
|
(1,103)
|
(1,545)
|
| Return of helicopter deposits |
544
|
0
|
0
|
| Business acquisitions, net of cash acquired |
0
|
(1,747)
|
0
|
| Investments in and advances to equity investees |
0
|
(36)
|
(125)
|
| Proceeds from sale of FBO |
0
|
14,252
|
0
|
| Principal payments on notes due from equity investees |
723
|
688
|
638
|
| Principal payments on third party notes receivable |
208
|
52
|
460
|
| Escrow deposits, net |
(3,658)
|
(191)
|
0
|
| Repayment of intercompany debt |
0
|
0
|
|
| Proceeds from sale of interest in equity investees |
0
|
0
|
6,381
|
| Net cash used in investing activities |
(12,774)
|
(22,807)
|
(93,872)
|
| Cash flows from financing activities: |
|
|
|
| Proceeds from Revolving Credit Facility |
12,000
|
60,000
|
30,000
|
| Long-term debt issuance costs |
(886)
|
(71)
|
(2,446)
|
| Payments on long-term debt |
(40,444)
|
(57,925)
|
(2,885)
|
| Extinguishment of long-term debt |
(4,331)
|
(46,920)
|
0
|
| Proceeds and tax benefits from share award plans |
836
|
1,096
|
1,458
|
| Tax expense on vested restricted stock |
0
|
(127)
|
0
|
| Purchase of treasury shares |
(161)
|
(2,079)
|
0
|
| Repayment of intercompany debt |
0
|
0
|
0
|
| Net cash provided by (used in) financing activities |
(32,986)
|
(46,026)
|
26,127
|
| Effects of exchange rate changes on cash and cash equivalents |
(164)
|
(2,120)
|
(1,009)
|
| Net increase (decrease) in cash and cash equivalents |
12,580
|
(26,497)
|
9,532
|
| Cash and cash equivalents, beginning of year |
14,370
|
40,867
|
31,335
|
| Cash and cash equivalents, end of year |
26,950
|
14,370
|
40,867
|
| Parent |
|
|
|
| Condensed Cash Flow Statements, Captions [Line Items] |
|
|
|
| Net cash provided by operating activities |
17,909
|
(8,916)
|
(8,154)
|
| Cash flows from investing activities: |
|
|
|
| Purchases of property and equipment |
0
|
0
|
0
|
| Proceeds from disposition of property and equipment |
0
|
0
|
0
|
| Cash settlements on forward contracts, net |
|
0
|
0
|
| Return of helicopter deposits |
0
|
|
|
| Business acquisitions, net of cash acquired |
|
0
|
|
| Investments in and advances to equity investees |
|
0
|
0
|
| Proceeds from sale of FBO |
|
0
|
|
| Principal payments on notes due from equity investees |
0
|
0
|
0
|
| Principal payments on third party notes receivable |
0
|
0
|
0
|
| Escrow deposits, net |
0
|
0
|
|
| Repayment of intercompany debt |
0
|
0
|
|
| Proceeds from sale of interest in equity investees |
|
|
0
|
| Net cash used in investing activities |
0
|
0
|
0
|
| Cash flows from financing activities: |
|
|
|
| Proceeds from Revolving Credit Facility |
0
|
0
|
0
|
| Long-term debt issuance costs |
0
|
0
|
0
|
| Payments on long-term debt |
0
|
0
|
0
|
| Extinguishment of long-term debt |
0
|
0
|
|
| Proceeds and tax benefits from share award plans |
0
|
0
|
0
|
| Tax expense on vested restricted stock |
|
0
|
|
| Purchase of treasury shares |
0
|
0
|
|
| Repayment of intercompany debt |
0
|
0
|
0
|
| Net cash provided by (used in) financing activities |
0
|
0
|
0
|
| Effects of exchange rate changes on cash and cash equivalents |
0
|
0
|
0
|
| Net increase (decrease) in cash and cash equivalents |
17,909
|
(8,916)
|
(8,154)
|
| Cash and cash equivalents, beginning of year |
7,565
|
16,481
|
24,635
|
| Cash and cash equivalents, end of year |
25,474
|
7,565
|
16,481
|
| Guarantors |
|
|
|
| Condensed Cash Flow Statements, Captions [Line Items] |
|
|
|
| Net cash provided by operating activities |
41,239
|
38,111
|
85,539
|
| Cash flows from investing activities: |
|
|
|
| Purchases of property and equipment |
(39,020)
|
(60,046)
|
(106,732)
|
| Proceeds from disposition of property and equipment |
28,381
|
37,098
|
7,051
|
| Cash settlements on forward contracts, net |
|
(1,103)
|
(1,545)
|
| Return of helicopter deposits |
544
|
|
|
| Business acquisitions, net of cash acquired |
|
0
|
|
| Investments in and advances to equity investees |
|
(36)
|
(125)
|
| Proceeds from sale of FBO |
|
0
|
|
| Principal payments on notes due from equity investees |
723
|
688
|
638
|
| Principal payments on third party notes receivable |
208
|
52
|
460
|
| Escrow deposits, net |
(3,848)
|
(1)
|
|
| Repayment of intercompany debt |
190
|
14,062
|
|
| Proceeds from sale of interest in equity investees |
|
|
6,381
|
| Net cash used in investing activities |
(12,822)
|
(9,286)
|
(93,872)
|
| Cash flows from financing activities: |
|
|
|
| Proceeds from Revolving Credit Facility |
0
|
0
|
0
|
| Long-term debt issuance costs |
0
|
(71)
|
0
|
| Payments on long-term debt |
(1,803)
|
(2,458)
|
(2,885)
|
| Extinguishment of long-term debt |
0
|
0
|
|
| Proceeds and tax benefits from share award plans |
0
|
0
|
0
|
| Tax expense on vested restricted stock |
|
0
|
|
| Purchase of treasury shares |
0
|
0
|
|
| Repayment of intercompany debt |
(29,542)
|
(43,030)
|
29,012
|
| Net cash provided by (used in) financing activities |
(31,345)
|
(45,559)
|
26,127
|
| Effects of exchange rate changes on cash and cash equivalents |
(406)
|
(2,120)
|
(1,009)
|
| Net increase (decrease) in cash and cash equivalents |
(3,334)
|
(18,854)
|
16,785
|
| Cash and cash equivalents, beginning of year |
3,334
|
22,188
|
5,403
|
| Cash and cash equivalents, end of year |
0
|
3,334
|
22,188
|
| Non-guarantors |
|
|
|
| Condensed Cash Flow Statements, Captions [Line Items] |
|
|
|
| Net cash provided by operating activities |
(644)
|
15,261
|
901
|
| Cash flows from investing activities: |
|
|
|
| Purchases of property and equipment |
(180)
|
(11,774)
|
0
|
| Proceeds from disposition of property and equipment |
228
|
0
|
0
|
| Cash settlements on forward contracts, net |
|
0
|
0
|
| Return of helicopter deposits |
0
|
|
|
| Business acquisitions, net of cash acquired |
|
(1,747)
|
|
| Investments in and advances to equity investees |
|
0
|
0
|
| Proceeds from sale of FBO |
|
0
|
|
| Principal payments on notes due from equity investees |
0
|
0
|
0
|
| Principal payments on third party notes receivable |
0
|
0
|
0
|
| Escrow deposits, net |
0
|
0
|
|
| Repayment of intercompany debt |
0
|
0
|
|
| Proceeds from sale of interest in equity investees |
|
|
0
|
| Net cash used in investing activities |
48
|
(13,521)
|
0
|
| Cash flows from financing activities: |
|
|
|
| Proceeds from Revolving Credit Facility |
0
|
0
|
0
|
| Long-term debt issuance costs |
0
|
0
|
0
|
| Payments on long-term debt |
(1,641)
|
(467)
|
0
|
| Extinguishment of long-term debt |
0
|
0
|
|
| Proceeds and tax benefits from share award plans |
0
|
0
|
0
|
| Tax expense on vested restricted stock |
|
0
|
|
| Purchase of treasury shares |
0
|
0
|
|
| Repayment of intercompany debt |
0
|
0
|
0
|
| Net cash provided by (used in) financing activities |
(1,641)
|
(467)
|
0
|
| Effects of exchange rate changes on cash and cash equivalents |
242
|
0
|
0
|
| Net increase (decrease) in cash and cash equivalents |
(1,995)
|
1,273
|
901
|
| Cash and cash equivalents, beginning of year |
3,471
|
2,198
|
1,297
|
| Cash and cash equivalents, end of year |
1,476
|
3,471
|
2,198
|
| Eliminations |
|
|
|
| Condensed Cash Flow Statements, Captions [Line Items] |
|
|
|
| Net cash provided by operating activities |
0
|
0
|
0
|
| Cash flows from investing activities: |
|
|
|
| Purchases of property and equipment |
0
|
11,770
|
0
|
| Proceeds from disposition of property and equipment |
0
|
(11,770)
|
0
|
| Cash settlements on forward contracts, net |
|
0
|
0
|
| Return of helicopter deposits |
0
|
|
|
| Investments in and advances to equity investees |
|
0
|
0
|
| Proceeds from sale of FBO |
|
14,252
|
|
| Principal payments on notes due from equity investees |
0
|
0
|
0
|
| Principal payments on third party notes receivable |
0
|
0
|
0
|
| Escrow deposits, net |
190
|
(190)
|
|
| Repayment of intercompany debt |
(190)
|
(14,062)
|
|
| Proceeds from sale of interest in equity investees |
|
|
0
|
| Net cash used in investing activities |
0
|
0
|
0
|
| Cash flows from financing activities: |
|
|
|
| Proceeds from Revolving Credit Facility |
12,000
|
60,000
|
30,000
|
| Long-term debt issuance costs |
(886)
|
0
|
(2,446)
|
| Payments on long-term debt |
(37,000)
|
(55,000)
|
0
|
| Extinguishment of long-term debt |
(4,331)
|
(46,920)
|
|
| Proceeds and tax benefits from share award plans |
836
|
1,096
|
1,458
|
| Tax expense on vested restricted stock |
|
(127)
|
|
| Purchase of treasury shares |
(161)
|
(2,079)
|
|
| Repayment of intercompany debt |
29,542
|
43,030
|
(29,012)
|
| Net cash provided by (used in) financing activities |
0
|
0
|
0
|
| Effects of exchange rate changes on cash and cash equivalents |
0
|
0
|
0
|
| Net increase (decrease) in cash and cash equivalents |
0
|
0
|
0
|
| Cash and cash equivalents, beginning of year |
0
|
0
|
0
|
| Cash and cash equivalents, end of year |
$ 0
|
$ 0
|
$ 0
|