CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows from Operating Activities:
Net loss	$ (16,721,000)	$ (95,898,000)
Items included in net loss not affecting cash flows:
Depreciation and amortization	56,708,000	53,745,000
Loss on write-down of vessels and other assets	0	17,367,000
Amortization of debt discount and other deferred financing costs	5,373,000	4,434,000
Deferred financing costs write-off	343,000	2,400,000
Stock compensation, non-cash	2,912,000	2,203,000
Earnings of affiliated companies	(24,945,000)	(22,965,000)
Other - net	538,000	436,000
Items included in net loss related to investing and financing activities:
Loss/(gain) on disposal of vessels and other property, net	28,000	(174,000)
Loss on repurchase of debt	100,000	1,295,000
Cash distributions from affiliated companies	10,214,000	39,767,000
Payments for drydocking	(13,539,000)	(3,968,000)
Insurance claims proceeds related to vessel operations	967,000	5,125,000
Changes in operating assets and liabilities:
Decrease/(increase) in receivables	19,165,000	(15,759,000)
Decrease in deferred revenue	(25,000)	(903,000)
Net change in inventories, prepaid expenses and other current assets, accounts payable, accrued expenses and other current and long-term liabilities	2,238,000	14,742,000
Net cash provided by operating activities	43,356,000	1,847,000
Cash Flows from Investing Activities:
Expenditures for vessels and vessel improvements	(9,797,000)	(135,215,000)
Proceeds from disposal of vessels and other property, net	15,762,000	132,886,000
Expenditures for other property	(406,000)	(333,000)
Investments in and advances to affiliated companies, net	2,104,000	2,891,000
Repayments of advances from affiliated companies	4,836,000	95,987,000
Net cash provided by investing activities	12,499,000	96,216,000
Cash Flows from Financing Activities:
Issuance of debt, net of issuance and deferred financing costs		70,266,000
Extinguishment of debt	(10,000,000)	(62,069,000)
Payments on debt	(38,531,000)	(52,596,000)
Premium on extinguishment of debt	(100,000)
Cash paid to tax authority upon vesting of stock-based compensation	(369,000)	(410,000)
Other - net	(277,000)
Net cash used in financing activities	(49,277,000)	(44,809,000)
Net increase in cash, cash equivalents and restricted cash	6,578,000	53,254,000
Cash, cash equivalents and restricted cash at beginning of year	117,644,000	70,606,000
Cash, cash equivalents and restricted cash at end of period	$ 124,222,000	$ 123,860,000