Business and Segment Reporting (Reconciliation of Income from Vessel Operations to Profit (Loss) Before Reorganization) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Business and Segment Reporting [Abstract]
Total adjusted income/(loss) from vessel operations of all segments	$ 2,116	$ (13,236)	$ 29,383	$ (36,383)
General and administrative expenses	(6,449)	(5,434)	(19,519)	(17,527)
Provision for credit losses, net	18	0	(1,259)	(41)
Third-party debt modification fees		9	(30)	(1,293)
Gain/(loss) on disposal of vessels and other property, net of impairments	1,472	(17,360)	(28)	(17,193)
(Loss)/income from vessel operations	(2,843)	(36,021)	8,547	(72,396)
Equity in income of affiliated companies	8,474	5,338	24,559	22,500
Other income/(expense)	284	220	2,159	(3,964)
Interest expense	(17,010)	(17,320)	(51,986)	(42,027)
Loss before income taxes	$ (11,095)	$ (47,783)	$ (16,721)	$ (95,887)