Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities:
Net income (loss)	$ 10,816	$ (12,271)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	21,048	17,673
Amortization of deferred drydocking and survey costs	9,618	8,984
Amortization of debt premium and discounts	420	375
Provision for deferred income taxes	35	177
Gain on asset dispositions, net	(2,216)	(207)
Gain on bargain purchase	0	(1,300)
Long-lived asset impairment and other	0	(500)
Stock-based compensation expense	2,103	1,458
Changes in assets and liabilities, net of effects of business acquisition:
Trade and other receivables	(25,733)	(15,570)
Changes in due to/from affiliates, net	0	(20)
Accounts payable	25,829	2,825
Accrued expenses	1,830	3,207
Deferred drydocking and survey costs	(31,325)	(12,612)
Other, net	369	(3,843)
Net cash provided by (used in) operating activities	12,794	(11,624)
Cash flows from investing activities:
Proceeds from asset dispositions	5,716	4,628
Acquisitions, net of cash acquired	0	(1,039)
Additions to properties and equipment	(8,651)	(1,229)
Net cash provided by (used in) investing activities	(2,935)	2,360
Cash flows from financing activities:
Acquisition of non-controlling interest in a majority owned subsidiary	(1,427)	0
Debt issuance and modification costs	0	(263)
Tax on share-based awards	(3,747)	(1,017)
Net cash used in financing activities	(5,174)	(1,280)
Net change in cash, cash equivalents and restricted cash	4,685	(10,544)
Cash, cash equivalents and restricted cash at beginning of period	167,977	154,276
Cash, cash equivalents and restricted cash at end of period	172,662	143,732
Supplemental disclosure of cash flow information:
Interest, net of amounts capitalized	98	0
Income taxes	$ 17,057	$ 3,200