Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss	$ (91,182,000)	$ (5,126,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	16,039,000	18,488,000
Amortization of stock-based compensation	1,498,000	1,804,000
Amortization of deferred financing costs	806,000	$ 582,000
Impairment	116,657,000
Provision for doubtful accounts receivable, net of write-offs	23,000	$ (892,000)
Gain on extinguishment of debt	(10,120,000)
Deferred income tax benefit	(35,624,000)	$ (4,534,000)
Foreign currency transaction (gain) loss	(223,000)	566,000
Change in operating assets and liabilities:
Accounts receivable	12,859,000	10,722,000
Prepaids and other	659,000	(3,559,000)
Accounts payable	2,573,000	(3,763,000)
Other accrued liabilities and other	(13,865,000)	(11,730,000)
Net cash provided by operating activities	100,000	2,558,000
Cash flows from investing activities:
Purchases of vessels, equipment and other fixed assets	$ (7,200,000)	(11,618,000)
Release of deposits held in escrow		3,683,000
Proceeds from disposition of vessels and equipment	$ 29,000	715,000
Net cash used in investing activities	(7,171,000)	(7,220,000)
Cash flows from financing activities:
Proceeds from borrowings under revolving loan facility	15,000,000	$ 16,000,000
Repayment of Senior Notes	(9,880,000)
Debt issuance costs	(769,000)	$ (1,191,000)
Proceeds from issuance of stock	121,000	307,000
Net cash provided by financing activities	4,472,000	15,116,000
Effect of exchange rate changes on cash	329,000	(1,392,000)
Net increase (decrease) in cash and cash equivalents	(2,270,000)	9,062,000
Cash and cash equivalents at beginning of period	21,939,000	50,785,000
Cash and cash equivalents at end of period	19,669,000	59,847,000
Supplemental cash flow information:
Interest paid, net of interest capitalized	15,353,000	15,361,000
Income taxes paid, net	$ 449,000	$ 396,000