Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities:
Net (loss)/income	$ (15,868)	$ 25,125
Items included in net income not affecting cash flows:
Depreciation and amortization	15,319	14,019
Gain on termination of pre-existing arrangement		(19,172)
Loss on disposal of vessels and other property, including impairments, net	5,493	296
Amortization of debt discount and other deferred financing costs	557	533
Compensation relating to restricted stock awards and stock option grants	575	438
Deferred income tax (benefit)/expense	(6,178)	2,135
Interest on finance lease liabilities	460	506
Non-cash operating lease expense	22,717	22,811
Distributed earnings of affiliated companies		3,562
Payments for drydocking	(8,179)	(3,327)
Operating lease liabilities	(22,860)	(22,969)
Changes in operating assets and liabilities, net	(1,217)	2,162
Net cash (used in)/provided by operating activities	(9,181)	26,119
Cash Flows from Investing Activities:
Acquisition, net of cash acquired		(16,973)
Expenditures for vessels and vessel improvements	(3,227)	(20,871)
Expenditures for other property		(232)
Net cash used in investing activities	(3,227)	(38,076)
Cash Flows from Financing Activities:
Payments on debt	(9,616)	(7,865)
Tax withholding on share-based awards	(402)	(197)
Payments on principal portion of finance lease liabilities	(1,026)	(1,037)
Extinguishment of debt	(301)
Deferred financing costs paid for debt amendments	(877)
Issuance of debt, net of issuance and deferred financing costs		80,886
Net cash (used in)/provided by financing activities	(12,222)	71,787
Net (decrease)/increase in cash, cash equivalents and restricted cash	(24,630)	59,830
Cash, cash equivalents and restricted cash at beginning of period	69,819	41,677
Cash, cash equivalents and restricted cash at end of period	$ 45,189	$ 101,507