Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities:
Net income (loss)	$ 32,744	$ (37,285)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	42,144	40,287
Amortization of deferred drydocking and survey costs	21,290	18,136
Amortization of debt premium and discounts	842	765
Provision for deferred income taxes	34	145
(Gain) loss on asset dispositions, net	(3,620)	1,090
Gain on pension settlement	(1,807)	0
Gain on bargain purchase	0	(1,300)
Long-lived asset impairment credit	0	(500)
Loss on warrants	0	14,175
Stock-based compensation expense	4,751	3,421
Changes in assets and liabilities, net of effects of business acquisition:
Trade and other receivables	(37,919)	(35,085)
Changes in due to/from affiliates, net	0	(20)
Accounts payable	30,876	8,072
Accrued expenses	(13,544)	2,354
Deferred drydocking and survey costs	(52,691)	(31,063)
Other, net	(565)	(16,419)
Net cash provided by (used in) operating activities	22,535	(33,227)
Cash flows from investing activities:
Proceeds from asset dispositions	8,659	8,163
Acquisitions, net of cash acquired	0	(29,525)
Additions to properties and equipment	(17,500)	(5,380)
Net cash used in investing activities	(8,841)	(26,742)
Cash flows from financing activities:
Acquisition of non-controlling interest in a majority owned subsidiary	(1,427)	0
Debt issuance and modification costs	0	(371)
Tax on share-based awards	(5,521)	(2,176)
Net cash used in financing activities	(6,948)	(2,547)
Net change in cash, cash equivalents and restricted cash	6,746	(62,516)
Cash, cash equivalents and restricted cash at beginning of period	167,977	154,276
Cash, cash equivalents and restricted cash at end of period	174,723	91,760
Supplemental disclosure of cash flow information:
Interest, net of amounts capitalized	7,846	7,626
Income taxes	27,201	9,330
Supplemental disclosure of noncash investing activities:
Acquisition of SPO	0	162,648
Purchase of three vessels	12,171	0
Warrants issued for SPO acquisition	0	162,648
Debt incurred for purchase of three vessels	$ 12,171	$ 0