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GUARANTORS OF SECURITIES (Condensed Cash Flow Statement) (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2017 | Jun. 30, 2016
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | $ 13,374 | $ 28,561
Cash flows from investing activities: |  |
Purchases of property and equipment | (12,524) | (5,106)
Proceeds from disposition of property and equipment | 5,689 | 5,910
Return of helicopter deposits | 0 | 544
Investments in and advances to equity investees | (126) | 0
Principal payments on notes due from equity investees | 375 | 357
Principal payments on third party notes receivable | 94 | 136
Escrow deposits on like-kind exchanges, net | 3,777 | 0
Net cash provided by (used in) investing activities | (2,715) | 1,841
Cash flows from financing activities: |  |
Payments on long-term debt | (18,162) | (9,093)
Proceeds from Revolving Credit Facility | 9,000 | 7,000
Extinguishment of long-term debt | 0 | (4,331)
Proceeds from share award plans | 463 | 477
Purchase of treasury shares | (51) | (161)
Borrowings and repayments of intercompany debt | 0 | 0
Net cash used in financing activities | (8,750) | (6,108)
Effects of exchange rate changes on cash and cash equivalents | 19 | 496
Net increase (decrease) in cash and cash equivalents | 1,928 | 24,790
Cash and cash equivalents, beginning of period | 26,950 | 14,370
Cash and cash equivalents, end of period | 28,878 | 39,160
Reportable Legal Entities | Parent |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 1,967 | 28,465
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
Investments in and advances to equity investees | 0 |
Principal payments on notes due from equity investees | 0 | 0
Principal payments on third party notes receivable | 0 | 0
Escrow deposits on like-kind exchanges, net | 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 | 0
Borrowings and repayments 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 | 1,967 | 28,465
Cash and cash equivalents, beginning of period | 25,474 | 7,565
Cash and cash equivalents, end of period | 27,441 | 36,030
Reportable Legal Entities | Guarantors |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 11,086 | 1,126
Cash flows from investing activities: |  |
Purchases of property and equipment | (12,490) | (4,974)
Proceeds from disposition of property and equipment | 5,689 | 5,910
Return of helicopter deposits |  | 544
Investments in and advances to equity investees | (126) |
Principal payments on notes due from equity investees | 375 | 357
Principal payments on third party notes receivable | 94 | 136
Escrow deposits on like-kind exchanges, net | 3,777 |
Net cash provided by (used in) investing activities | (2,681) | 1,973
Cash flows from financing activities: |  |
Payments on long-term debt | (832) | (970)
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 | 0
Borrowings and repayments of intercompany debt | (7,588) | (4,015)
Net cash used in financing activities | (8,420) | (4,985)
Effects of exchange rate changes on cash and cash equivalents | 15 | 320
Net increase (decrease) in cash and cash equivalents | 0 | (1,566)
Cash and cash equivalents, beginning of period | 0 | 3,334
Cash and cash equivalents, end of period | 0 | 1,768
Reportable Legal Entities | Non-guarantors |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 321 | (1,030)
Cash flows from investing activities: |  |
Purchases of property and equipment | (34) | (132)
Proceeds from disposition of property and equipment | 0 | 0
Return of helicopter deposits |  | 0
Investments in and advances to equity investees | 0 |
Principal payments on notes due from equity investees | 0 | 0
Principal payments on third party notes receivable | 0 | 0
Escrow deposits on like-kind exchanges, net | 0 |
Net cash provided by (used in) investing activities | (34) | (132)
Cash flows from financing activities: |  |
Payments on long-term debt | (330) | (1,123)
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 | 0
Borrowings and repayments of intercompany debt | 0 | 0
Net cash used in financing activities | (330) | (1,123)
Effects of exchange rate changes on cash and cash equivalents | 4 | 176
Net increase (decrease) in cash and cash equivalents | (39) | (2,109)
Cash and cash equivalents, beginning of period | 1,476 | 3,471
Cash and cash equivalents, end of period | 1,437 | 1,362
Eliminations |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |
Net cash provided by (used in) operating activities | 0 | 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
Investments in and advances to equity investees | 0 |
Principal payments on notes due from equity investees | 0 | 0
Principal payments on third party notes receivable | 0 | 0
Escrow deposits on like-kind exchanges, net | 0 |
Net cash provided by (used in) investing activities | 0 | 0
Cash flows from financing activities: |  |
Payments on long-term debt | (17,000) | (7,000)
Proceeds from Revolving Credit Facility | 9,000 | 7,000
Extinguishment of long-term debt |  | (4,331)
Proceeds from share award plans | 463 | 477
Purchase of treasury shares | (51) | (161)
Borrowings and repayments of intercompany debt | 7,588 | 4,015
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 | 0 | 0
Cash and cash equivalents, beginning of period | 0 | 0
Cash and cash equivalents, end of period | $ 0 | $ 0

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