CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) / income	$ (123,149)	$ 61,502
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Loss on disposal of vessels, net	114,644	10,177
Goodwill impairment		26,291
Payment-in-kind interest expense	14,560	13,729
Depreciation and amortization	80,127	60,622
Amortization of fair value of related-party chartered-in vessel		427
Amortization of deferred financing costs and senior notes	12,221	7,879
Loss on litigation	400
Net unrealized loss on derivative financial instrument	15,292
Stock-based compensation expense	3,607	4,299
Provision for bad debts	1,492	(2,689)
Changes in assets and liabilities:
(Increase) decrease in due from charterers	(706)	13,267
Decrease in due from Navig8 pools	32,842	2,866
(Increase) decrease in prepaid expenses and other current and noncurrent assets	(1,695)	59,606
Decrease (increase) in working capital at Navig8 pools	6,150	(5,950)
Decrease in accounts payable and other current and noncurrent liabilities	(4,116)	(5,680)
Deferred drydock costs incurred	(8,796)	(9,228)
Net cash provided by operating activities	142,873	237,118
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments for vessels under construction	(97,543)	(800,688)
Payment of capitalized interest	(1,670)	(15,456)
Proceeds from sale of vessels, net	238,751	72,505
Purchase of vessel improvements and other fixed assets	(7,369)	(7,808)
Net cash provided by (used in) investing activities	132,169	(751,447)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under credit facilities	100,131	636,216
Repayments of credit facilities	(283,746)	(158,665)
Proceeds from issuance of common stock		26
Deferred financing costs paid	(1,431)	(20,737)
Net cash (used in) provided by financing activities	(185,046)	456,840
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	89,996	(57,489)
CASH AND CASH EQUIVALENTS, beginning of period	94,681	157,535
CASH AND CASH EQUIVALENTS, end of period	184,677	100,046
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION -
Cash paid during the period for interest, net of capitalized interest	$ 36,284	$ 19,993