Annual report pursuant to Section 13 and 15(d)

GUARANTORS OF SECURITIES Supplemental Condensed Consolidating Statements of Cash Flows (Details)

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GUARANTORS OF SECURITIES Supplemental Condensed Consolidating Statements of Cash Flows (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities $ 20,096 $ 58,504 $ 44,456
Cash flows from investing activities:      
Purchases of property and equipment (16,770) (39,200) (60,050)
Proceeds from disposition of property and equipment 9,392 28,609 25,328
Cash settlements on forward contracts, net 0 0 (1,103)
Return of helicopter deposits 0 544 0
Business acquisitions, net of cash acquired 0 0 (1,747)
Investments in and advances to equity investees (126) 0 (36)
Proceeds from sale of FBO 0 0 14,252
Principal payments on notes due from equity investees 761 723 688
Principal payments on third party notes receivable 169 208 52
Escrow deposits on like-kind exchanges, net 527 (3,658) (191)
Repayment of intercompany debt   0 0
Net cash used in investing activities (6,047) (12,774) (22,807)
Cash flows from financing activities:      
Proceeds from Revolving Credit Facility 17,000 12,000 60,000
Long-term debt issuance costs 0 (886) (71)
Payments on long-term debt (45,281) (40,444) (57,925)
Extinguishment of long-term debt 0 (4,331) (46,920)
Proceeds and tax benefits from share award plans 836 836 1,096
Tax expense on vested restricted stock 0 0 (127)
Purchase of treasury shares (52) (161) (2,079)
Borrowings and repayments of intercompany debt 0 0 0
Net cash used in financing activities (27,497) (32,986) (46,026)
Effects of exchange rate changes on cash and cash equivalents 81 (164) (2,120)
Net increase (decrease) in cash and cash equivalents (13,367) 12,580 (26,497)
Cash and cash equivalents, beginning of year 26,950 14,370 40,867
Cash and cash equivalents, end of year 13,583 26,950 14,370
Parent      
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities (14,706) 17,909 (8,916)
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
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 on like-kind exchanges, net 0 0 0
Repayment of intercompany debt   0 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
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 0
Borrowings and repayments of intercompany debt 0 0 0
Net cash used in financing activities 0 0 0
Effects of exchange rate changes on cash and cash equivalents 32 0 0
Net increase (decrease) in cash and cash equivalents (14,674) 17,909 (8,916)
Cash and cash equivalents, beginning of year 25,474 7,565 16,481
Cash and cash equivalents, end of year 10,800 25,474 7,565
Guarantors      
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities 32,601 41,239 38,111
Cash flows from investing activities:      
Purchases of property and equipment (16,600) (39,020) (60,046)
Proceeds from disposition of property and equipment 9,392 28,381 37,098
Cash settlements on forward contracts, net     (1,103)
Return of helicopter deposits   544  
Business acquisitions, net of cash acquired     0
Investments in and advances to equity investees (126)   (36)
Proceeds from sale of FBO     0
Principal payments on notes due from equity investees 761 723 688
Principal payments on third party notes receivable 169 208 52
Escrow deposits on like-kind exchanges, net 527 (3,848) (1)
Repayment of intercompany debt   190 14,062
Net cash used in investing activities (5,877) (12,822) (9,286)
Cash flows from financing activities:      
Proceeds from Revolving Credit Facility 8,000 0 0
Long-term debt issuance costs   0 (71)
Payments on long-term debt (1,526) (1,803) (2,458)
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 0
Borrowings and repayments of intercompany debt (33,216) (29,542) (43,030)
Net cash used in financing activities (26,742) (31,345) (45,559)
Effects of exchange rate changes on cash and cash equivalents 18 (406) (2,120)
Net increase (decrease) in cash and cash equivalents 0 (3,334) (18,854)
Cash and cash equivalents, beginning of year 0 3,334 22,188
Cash and cash equivalents, end of year 0 0 3,334
Non-guarantors      
Condensed Cash Flow Statements, Captions [Line Items]      
Net cash provided by operating activities 2,201 (644) 15,261
Cash flows from investing activities:      
Purchases of property and equipment (170) (180) (11,774)
Proceeds from disposition of property and equipment 0 228 0
Cash settlements on forward contracts, net     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 on like-kind exchanges, net 0 0 0
Repayment of intercompany debt   0 0
Net cash used in investing activities (170) 48 (13,521)
Cash flows from financing activities:      
Proceeds from Revolving Credit Facility 0 0 0
Long-term debt issuance costs   0 0
Payments on long-term debt (755) (1,641) (467)
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 0
Borrowings and repayments of intercompany debt 0 0 0
Net cash used in financing activities (755) (1,641) (467)
Effects of exchange rate changes on cash and cash equivalents 31 242 0
Net increase (decrease) in cash and cash equivalents 1,307 (1,995) 1,273
Cash and cash equivalents, beginning of year 1,476 3,471 2,198
Cash and cash equivalents, end of year 2,783 1,476 3,471
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
Proceeds from disposition of property and equipment 0 (11,770)
Cash settlements on forward contracts, net     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     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 on like-kind exchanges, net 0 190 (190)
Repayment of intercompany debt   (190) (14,062)
Net cash used in investing activities 0 0 0
Cash flows from financing activities:      
Proceeds from Revolving Credit Facility 9,000 12,000 60,000
Long-term debt issuance costs   (886) 0
Payments on long-term debt (43,000) (37,000) (55,000)
Extinguishment of long-term debt   (4,331) (46,920)
Proceeds and tax benefits from share award plans 836 836 1,096
Tax expense on vested restricted stock     (127)
Purchase of treasury shares (52) (161) (2,079)
Borrowings and repayments of intercompany debt 33,216 29,542 43,030
Net cash 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