Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income, including noncontrolling interests	$ 26,887	$ 187,590
Adjustments to reconcile net income, including noncontrolling interests, to net cash provided by operating activities:
Depreciation and amortization	86,333	81,274
Amortization of deferred financing costs	4,117	3,653
Stock-based compensation expense	7,941	5,711
Amortization of debt discount	4,409	4,149
Deferred income taxes	(2,403)	24,728
Excess tax from stock-based compensation	98	(120)
Gain on disposition of assets, net	0	(10,418)
Unrealized loss and ineffectiveness on derivative contracts, net	2,222	69
Changes in operating assets and liabilities:
Accounts receivable, net	(13,326)	(16,496)
Other current assets	6,610	(19,388)
Income tax payable, net of income tax receivable	(12,152)	25,440
Accounts payable and accrued liabilities	(52,045)	25,127
Other noncurrent, net	(19,164)	(9,758)
Net cash provided by operating activities	39,527	301,561
Cash flows from investing activities:
Capital expenditures	(280,523)	(204,528)
Distributions from equity investments, net	5,853	5,041
Proceeds from sale of assets	7,500	11,074
Acquisition of noncontrolling interests	0	(20,085)
Net cash used in investing activities	(267,170)	(208,498)
Cash flows from financing activities:
Proceeds from Nordea Q5000 Loan	250,000	0
Repayment of Nordea Q5000 Loan	(8,929)	0
Repayment of Term Loan	(15,000)	(11,250)
Repayment of MARAD Debt	(5,644)	(5,376)
Deferred financing costs	(1,611)	(3,143)
Distributions to noncontrolling interests	0	(1,018)
Repurchases of common stock	(1,056)	(8,538)
Excess tax from stock-based compensation	(98)	120
Proceeds from issuance of ESPP shares	3,484	3,223
Net cash provided by (used in) financing activities	221,146	(25,982)
Effect of exchange rate changes on cash and cash equivalents	(1,059)	1,248
Net increase (decrease) in cash and cash equivalents	(7,556)	68,329
Cash and cash equivalents:
Balance, beginning of year	476,492	478,200
Balance, end of period	$ 468,936	$ 546,529