Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income, including noncontrolling interests	$ 17,007	$ 112,004
Adjustments to reconcile net income, including noncontrolling interests, to net cash provided by operating activities:
Depreciation and amortization	53,528	52,853
Amortization of deferred financing costs	2,596	2,435
Stock-based compensation expense	3,515	3,755
Amortization of debt discount	2,928	2,765
Deferred income taxes	(2,454)	27,669
Excess tax from stock-based compensation	(86)	(382)
Gain on disposition of assets, net	0	(10,418)
Unrealized loss and ineffectiveness on derivative contracts, net	1,941	69
Changes in operating assets and liabilities:
Accounts receivable, net	(29,006)	(40,687)
Other current assets	11,904	(1,998)
Income tax payable, net of income tax receivable	(9,472)	(24,376)
Accounts payable and accrued liabilities	(35,318)	14,312
Other noncurrent, net	(14,050)	1,504
Net cash provided by operating activities	3,033	139,505
Cash flows from investing activities:
Capital expenditures	(232,872)	(93,001)
Distributions from equity investments, net	3,842	4,849
Proceeds from sale of assets	7,500	11,074
Acquisition of noncontrolling interests	0	(20,085)
Net cash used in investing activities	(221,530)	(97,163)
Cash flows from financing activities:
Proceeds from Nordea Term Loan	250,000	0
Repayment of Term Loan	7,500	7,500
Repayment of MARAD Debt	(2,788)	(2,655)
Deferred financing costs	1,533	0
Distributions to noncontrolling interests	0	(1,018)
Repurchases of common stock	(1,056)	(6,653)
Excess tax from stock-based compensation	86	382
Proceeds from issuance of ESPP shares	2,512	1,932
Net cash provided by (used in) financing activities	239,721	(15,512)
Effect of exchange rate changes on cash and cash equivalents	2,346	(3,573)
Net increase in cash and cash equivalents	23,570	23,257
Cash and cash equivalents:
Balance, beginning of year	476,492	478,200
Balance, end of period	$ 500,062	$ 501,457