Consolidated Statements of Cash Flows - USD ($) $ in Thousands	2 Months Ended	10 Months Ended	12 Months Ended
	Dec. 31, 2017	Nov. 14, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income (loss)	$ 3,511
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	4,425
Amortization of deferred financing costs	275
Amortization of stock-based compensation
Provision for doubtful accounts receivable, net of write offs
Deferred income tax provision (benefit)	(10,456)
Loss on sale of assets
Impairment charges
Gain on extinguishment of debt
Other financing costs
Foreign currency (gain) loss	392
Reorganization items, net
Change in operating assets and liabilities —
Accounts receivable	(1,275)
Prepaids and other	714
Accounts payable	424
Other accrued liabilities and other	(8,064)
Net cash (used in) provided by operating activities	(9,256)
Cash flows from investing activities:
Purchases of vessels, equipment and other fixed assets	(141)
Release of deposits held in escrow
Proceeds from disposition of vessels, equipment and other fixed assets
Net cash used in investing activities	(141)
Cash flows from financing activities:
Proceeds from debt, net of direct financing cost
Repayments of debt
Rights offering proceeds
Repuchase of 6.375% senior notes
Repayment of revolving loan facility
Borrowings under revolving loan facility, net
Debt issuance costs	(862)
Other financing costs
Proceeds from issuance of stock
Net cash provided by (used in) financing activities	(862)
Effect of exchange rate changes on cash	(67)
Net increase (decrease) in cash and cash equivalents	(10,326)
Cash and cash equivalents	74,939	$ 8,822
Cash and cash equivalents	64,613	74,939	$ 8,822
Supplemental cash flow information:
Interest paid, net of interest capitalized	1
Income taxes paid, net
Predecessor [Member]
Cash flows from operating activities:
Net income (loss)		(400,919)	(202,979)	$ (215,235)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		47,721	58,182	72,591
Amortization of deferred financing costs		10,314	3,254	2,394
Amortization of stock-based compensation		2,805	5,209	6,735
Provision for doubtful accounts receivable, net of write offs		879	1,801	(862)
Deferred income tax provision (benefit)		63,487	(38,456)	(3,823)
Loss on sale of assets		5,207	8,564	1,160
Impairment charges			162,808	152,103
Gain on extinguishment of debt			(35,912)	(458)
Other financing costs			5,988
Foreign currency (gain) loss		(428)	1,025	(160)
Reorganization items, net		188,286
Change in operating assets and liabilities —
Accounts receivable		3,205	15,144	47,317
Prepaids and other		(3,229)	1,677	214
Accounts payable		238	(593)	(8,602)
Other accrued liabilities and other		16,099	(9,051)	(10,056)
Net cash (used in) provided by operating activities		(63,818)	(23,339)	43,357
Cash flows from investing activities:
Purchases of vessels, equipment and other fixed assets		(24,983)	(16,188)	(35,428)
Release of deposits held in escrow				3,683
Proceeds from disposition of vessels, equipment and other fixed assets		3,065	6,529	8,910
Net cash used in investing activities		(21,918)	(9,659)	(22,835)
Cash flows from financing activities:
Proceeds from debt, net of direct financing cost		227,443
Repayments of debt		(187,637)
Rights offering proceeds		124,979
Repuchase of 6.375% senior notes			(33,448)	(542)
Repayment of revolving loan facility			(5,000)	(91,000)
Borrowings under revolving loan facility, net			65,194	47,000
Debt issuance costs		(9,398)	(971)	(3,566)
Other financing costs		(4,299)	(5,988)
Proceeds from issuance of stock			380	827
Net cash provided by (used in) financing activities		151,088	20,167	(47,281)
Effect of exchange rate changes on cash		765	(286)	(2,087)
Net increase (decrease) in cash and cash equivalents		66,117	(13,117)	(28,846)
Cash and cash equivalents	$ 74,939	8,822	21,939	50,785
Cash and cash equivalents		74,939	8,822	21,939
Supplemental cash flow information:
Interest paid, net of interest capitalized		7,514	30,820	29,834
Income taxes paid, net		$ 1,456	$ 2,124	$ 2,048