CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Shipping Revenues:
Shipping revenues	$ 71,278	$ 60,926	$ 242,162	$ 169,813
Operating Expenses:
Voyage expenses	5,470	9,673	19,838	19,747
Vessel expenses	30,350	34,433	91,634	102,619
Charter hire expenses	14,381	10,739	44,599	30,085
Depreciation and amortization	18,961	19,317	56,708	53,745
General and administrative	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
Total operating expenses	74,121	96,947	233,615	242,209
(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
Operating income/(loss)	5,631	(30,683)	33,106	(49,896)
Other income/(expense)	284	220	2,159	(3,964)
Income/(loss) before interest expense and income taxes	5,915	(30,463)	35,265	(53,860)
Interest expense	(17,010)	(17,320)	(51,986)	(42,027)
Loss before income taxes	(11,095)	(47,783)	(16,721)	(95,887)
Income tax provision		(3)		(11)
Net loss	$ (11,095)	$ (47,786)	$ (16,721)	$ (95,898)
Weighted Average Number of Common Shares Outstanding:
Basic	29,249,233	29,154,366	29,217,188	29,130,435
Diluted	29,249,233	29,154,366	29,217,188	29,130,435
Per Share Amounts:
Basic and diluted net loss per share	$ (0.38)	$ (1.64)	$ (0.57)	$ (3.29)
Pool Revenue Leases [Member]
Shipping Revenues:
Shipping revenues	$ 46,278	$ 36,721	$ 158,628	$ 105,836
Time and Bareboat Charter Leases [Member]
Shipping Revenues:
Shipping revenues	7,638	5,932	19,699	20,453
Voyage Charter Leases [Member]
Shipping Revenues:
Shipping revenues	$ 17,362	$ 18,273	$ 63,835	$ 43,524