CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net loss	$ (198,083)	$ (176,890)	$ (77,149)
Adjustments to reconcile loss to net cash provided by operating activities:
Depreciation and amortization	124,042	118,748	136,812
Deferred income taxes	(49,334)	15,720	(51,643)
Write-off of deferred financing fees	2,969	923	0
Discount amortization on long-term debt	1,701	1,606	1,000
Loss on disposal of assets	17,595	14,499	30,693
Loss on impairment	91,400	16,278	55,104
Deferral of lease payments	3,991	0	0
Stock-based compensation	10,436	12,352	21,181
Equity in earnings from unconsolidated affiliates less than (in excess of) dividends received	(3,780)	(4,438)	2,619
Increase (decrease) in cash resulting from changes in:
Accounts receivable	(32,459)	23,759	46,608
Inventories	(2,154)	(1,958)	(3,380)
Prepaid expenses and other assets	11,913	1,267	493
Accounts payable	(3,385)	15,052	13,316
Accrued liabilities	6,070	(19,713)	(34,035)
Other liabilities and deferred credits	(466)	(5,668)	(23,388)
Net cash provided by (used in) operating activities	(19,544)	11,537	118,231
Cash flows from investing activities:
Capital expenditures	(46,287)	(135,110)	(372,375)
Proceeds from asset dispositions	48,740	18,471	60,035
Investment in unconsolidated affiliate	0	0	(4,410)
Proceeds from OEM cost recoveries	94,463	0	0
Deposit received on aircraft held for sale	0	290	0
Net cash provided by (used in) investing activities	96,916	(116,349)	(316,750)
Cash flows from financing activities:
Proceeds from borrowings	896,874	708,267	928,802
Payment of contingent consideration	0	(10,000)	(9,453)
Debt issuance costs	(20,560)	(8,010)	(5,139)
Repayment of debt and debt redemption premiums	(671,567)	(570,328)	(677,003)
Purchase of 4½% Convertible Senior Notes call option	(40,393)	0	0
Proceeds from issuance of warrants	30,259	0	0
Partial prepayment of put/call obligation	(49)	(49)	(55)
Acquisition of noncontrolling interests	0	0	(7,309)
Dividends paid to noncontrolling interest	(331)	(2,533)	(153)
Common stock dividends paid	(2,465)	(9,831)	(38,076)
Repurchases for tax withholdings on vesting of equity awards	(2,740)	(835)	(2,205)
Net cash provided by financing activities	189,028	106,681	189,409
Effect of exchange rate changes on cash and cash equivalents	17,167	(9,523)	9,274
Net increase (decrease) in cash and cash equivalents	283,567	(7,654)	164
Cash and cash equivalents at beginning of period	96,656	104,310	104,146
Cash and cash equivalents at end of period	380,223	96,656	104,310
Supplemental disclosure of non-cash investing activities:
Deferred sale leaseback advance	0	0	18,285
Completion of deferred sale leaseback	0	0	(74,480)
Aircraft sold for future spare parts and maintenance	0	0	1,228
Aircraft purchased with short-term borrowings	$ 0	$ 0	$ 24,394