CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income (loss)	$ (176,890)	$ (77,149)	$ 88,707
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	118,748	136,812	114,293
Deferred income taxes	15,720	(51,643)	(7,457)
Write-off of deferred financing fees	923	0	660
Discount amortization on long-term debt	1,606	1,000	4,323
Loss on disposal of assets	14,499	30,693	35,849
Gain on sale of unconsolidated affiliates	0	0	(3,921)
Loss on impairment	16,278	55,104	7,167
Extinguishment of debt	0	0	2,591
Stock-based compensation	12,352	21,181	16,353
Equity in earnings from unconsolidated affiliates less than (in excess of) dividends received	(4,438)	2,619	9,418
Tax benefit related to stock-based compensation	0	0	(1,550)
Increase (decrease) in cash resulting from changes in:
Accounts receivable	23,759	46,608	24,112
Inventories	(1,958)	(3,380)	(21,478)
Prepaid expenses and other assets	1,267	493	(25,485)
Accounts payable	15,052	13,316	(4,665)
Accrued liabilities	(19,713)	(34,035)	29,461
Other liabilities and deferred credits	(6,503)	(25,593)	(15,152)
Net cash provided by operating activities	10,702	116,026	253,226
Cash flows from investing activities:
Capital expenditures	(135,110)	(372,375)	(601,834)
Acquisitions, net of cash received	0	0	(20,303)
Proceeds from sale of unconsolidated affiliates	0	0	4,185
Proceeds from asset dispositions	18,471	60,035	414,859
Investment in unconsolidated affiliate	0	(4,410)	0
Deposit received on aircraft held for sale	290	0	0
Net cash used in investing activities	(116,349)	(316,750)	(203,093)
Cash flows from financing activities:
Proceeds from borrowings	708,267	928,802	454,393
Payments of contingent consideration	(10,000)	(9,453)	0
Debt issuance costs	(8,010)	(5,139)	0
Repayment of debt and debt redemption premiums	(570,328)	(677,003)	(460,274)
Partial prepayment of put/call obligation	(49)	(55)	(59)
Acquisition of noncontrolling interests	0	(7,309)	(3,170)
Dividends paid to noncontrolling interest	(2,533)	(153)	0
Repurchase of Common Stock	0	0	(80,831)
Common stock dividends paid	(9,831)	(38,076)	(45,078)
Issuance of common stock	0	0	5,172
Tax benefit related to stock-based compensation	0	0	1,550
Net cash provided by (used in) financing activities	107,516	191,614	(128,297)
Effect of exchange rate changes on cash and cash equivalents	(9,523)	9,274	(22,031)
Net increase (decrease) in cash and cash equivalents	(7,654)	164	(100,195)
Cash and cash equivalents at beginning of period	104,310	104,146	204,341
Cash and cash equivalents at end of period	96,656	104,310	104,146
Supplemental disclosure of non-cash investing activities:
Deferred sale leaseback advance	0	18,285	69,680
Completion of deferred sale leaseback	0	(74,480)	(183,688)
Aircraft sold for future spare parts and maintenance	0	1,228	13,417
Aircraft purchases with short-term borrowings	$ 0	$ 24,394	$ 0