Quarterly report pursuant to Section 13 or 15(d)

GUARANTORS OF SECURITIES (Condensed Cash Flow Statement) (Details)

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GUARANTORS OF SECURITIES (Condensed Cash Flow Statement) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Condensed Cash Flow Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities $ 14,793 $ 6,788
Cash flows from investing activities:    
Purchases of property and equipment (2,145) (8,866)
Proceeds from disposition of property and equipment 3,980 5,379
Return of helicopter deposits 544  
Cash settlements on forward contracts, net 0 (1,103)
Principal payments on notes due from equity investees 177 169
Principal payments on third party notes receivable 46 25
Escrow deposits, net   (2,800)
Repayment of intercompany debt   0
Net cash provided by (used in) investing activities 2,602 (7,196)
Cash flows from financing activities:    
Payments on long-term debt (8,651) (15,697)
Proceeds from Revolving Credit Facility 7,000 20,000
Extinguishment of long-term debt 0 (9,297)
Proceeds from share award plans 477 612
Purchase of treasury shares (161) 0
Repayment of intercompany debt 0 0
Net cash used in financing activities (1,335) (4,382)
Effects of exchange rate changes on cash and cash equivalents 373 (2,386)
Net increase (decrease) in cash and cash equivalents 16,433 (7,176)
Cash and cash equivalents, beginning of period 14,370 [1] 40,867
Cash and cash equivalents, end of period 30,803 33,691
Parent    
Condensed Cash Flow Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities 19,154 (1,517)
Cash flows from investing activities:    
Purchases of property and equipment 0 0
Proceeds from disposition of property and equipment 0 0
Return of helicopter deposits 0  
Cash settlements on forward contracts, net   0
Principal payments on notes due from equity investees 0 0
Principal payments on third party notes receivable 0 0
Escrow deposits, net   0
Repayment of intercompany debt   0
Net cash provided by (used in) investing activities 0 0
Cash flows from financing activities:    
Payments on long-term debt 0 0
Proceeds from Revolving Credit Facility 0 0
Extinguishment of long-term debt   0
Proceeds from share award plans 0 0
Purchase of treasury shares 0  
Repayment of intercompany debt 0 0
Net cash used in financing activities 0 0
Effects of exchange rate changes on cash and cash equivalents 0 0
Net increase (decrease) in cash and cash equivalents 19,154 (1,517)
Cash and cash equivalents, beginning of period 7,565 16,481
Cash and cash equivalents, end of period 26,719 14,964
Guarantors    
Condensed Cash Flow Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities (3,220) 8,304
Cash flows from investing activities:    
Purchases of property and equipment (2,090) (8,866)
Proceeds from disposition of property and equipment 3,980 5,379
Return of helicopter deposits 544  
Cash settlements on forward contracts, net   0
Principal payments on notes due from equity investees 177 169
Principal payments on third party notes receivable 46 25
Escrow deposits, net   (2,800)
Repayment of intercompany debt   (1,103)
Net cash provided by (used in) investing activities 2,657 (7,196)
Cash flows from financing activities:    
Payments on long-term debt (555) (697)
Proceeds from Revolving Credit Facility 0 0
Extinguishment of long-term debt   0
Proceeds from share award plans 0 0
Purchase of treasury shares 0  
Repayment of intercompany debt 316 (3,685)
Net cash used in financing activities (239) (4,382)
Effects of exchange rate changes on cash and cash equivalents 368 (2,386)
Net increase (decrease) in cash and cash equivalents (434) (5,660)
Cash and cash equivalents, beginning of period 3,334 22,188
Cash and cash equivalents, end of period 2,900 16,528
Non-guarantors    
Condensed Cash Flow Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities (1,491) 1
Cash flows from investing activities:    
Purchases of property and equipment (55) 0
Proceeds from disposition of property and equipment 0 0
Return of helicopter deposits 0  
Cash settlements on forward contracts, net   0
Principal payments on notes due from equity investees 0 0
Principal payments on third party notes receivable 0 0
Escrow deposits, net   0
Repayment of intercompany debt   0
Net cash provided by (used in) investing activities (55) 0
Cash flows from financing activities:    
Payments on long-term debt (1,096) 0
Proceeds from Revolving Credit Facility 0 0
Extinguishment of long-term debt   0
Proceeds from share award plans 0 0
Purchase of treasury shares 0  
Repayment of intercompany debt 350 0
Net cash used in financing activities (746) 0
Effects of exchange rate changes on cash and cash equivalents 5 0
Net increase (decrease) in cash and cash equivalents (2,287) 1
Cash and cash equivalents, beginning of period 3,471 2,198
Cash and cash equivalents, end of period 1,184 2,199
Eliminations    
Condensed Cash Flow Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities 350 0
Cash flows from investing activities:    
Purchases of property and equipment 0 0
Proceeds from disposition of property and equipment 0 0
Return of helicopter deposits 0  
Cash settlements on forward contracts, net   (1,103)
Principal payments on notes due from equity investees 0 0
Principal payments on third party notes receivable 0 0
Escrow deposits, net   0
Repayment of intercompany debt   1,103
Net cash provided by (used in) investing activities 0 0
Cash flows from financing activities:    
Payments on long-term debt (7,000) (15,000)
Proceeds from Revolving Credit Facility 7,000 20,000
Extinguishment of long-term debt   (9,297)
Proceeds from share award plans 477 612
Purchase of treasury shares (161)  
Repayment of intercompany debt (666) 3,685
Net cash used in financing activities (350) 0
Effects of exchange rate changes on cash and cash equivalents 0 0
Net increase (decrease) in cash and cash equivalents 0 0
Cash and cash equivalents, beginning of period 0 0
Cash and cash equivalents, end of period $ 0 $ 0
[1] Adjusted for the adoption of Accounting Standards Update (“ASU”) 2015-03 whereby $2,740 of debt issuance costs previously included in other assets is now included in long-term debt.