Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities:
Net income (loss)	$ 179,272	$ 95,621	$ (22,193)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	156,166	128,777	83,522
Amortization of deferred drydocking and survey costs	86,604	51,554	35,638
Amortization of debt premiums and discounts	6,741	4,619	1,679
Amortization of below market contracts	(5,000)	(3,800)	0
Deferred income taxes provision (benefit)	(2,807)	92	36
Gain on asset dispositions, net	(15,762)	(8,701)	(250)
Gain on pension settlement	0	(2,313)	0
Gain on bargain purchase	0	0	(1,300)
Long-lived asset impairments and other	0	0	714
Loss on warrants	0	0	14,175
Stock-based compensation expense	13,681	10,755	7,372
Changes in operating assets and liabilities, net:
Trade and other receivables	(55,453)	(109,756)	(4,129)
Due to/from affiliate, net	0	0	(20)
Marine operating supplies	(2,906)	1,984	(14,611)
Prepaid expenses and other current assets	1,584	5,813	(4,899)
Accounts payable	26,454	5,985	16,481
Accrued expenses	7,393	20,072	(1,340)
Other current liabilities	13,908	809	(555)
Other liabilities	(2,415)	(740)	(10,930)
Deferred drydocking and survey costs	(133,258)	(97,378)	(56,000)
Other, net	(353)	1,312	(3,164)
Net cash provided by operating activities	273,849	104,705	40,226
Cash flows from investing activities:
Proceeds from asset dispositions	19,338	15,506	13,568
Proceeds from sale of notes	8,054	0	0
Acquisitions, net of cash acquired	0	(594,191)	(20,740)
Additions to properties and equipment	(27,580)	(31,588)	(16,637)
Net cash used in investing activities	(188)	(610,273)	(23,809)
Cash flows from financing activities:
Exercise of warrants	4	111,483	0
Proceeds from issuance of shares	0	0	187,832
Repurchase of SPO acquisition warrants	0	0	(187,832)
Issuance of long-term debt	0	575,000	0
Principal payments on long-term debt	(103,030)	(13,677)	0
Purchase of common stock	(90,742)	(35,025)	0
Acquisition of non-controlling interest in a majority owned subsidiary	0	(1,427)	0
Debt issuance costs	(213)	(14,758)	(393)
Tax on share-based award	(28,614)	(6,040)	(2,323)
Net cash provided by (used in) financing activities	(222,595)	615,556	(2,716)
Net change in cash, cash equivalents and restricted cash	51,066	109,988	13,701
Cash, cash equivalents and restricted cash at beginning of period	277,965	167,977	154,276
Cash, cash equivalents and restricted cash at end of period	329,031	277,965	167,977
Supplemental disclosure of cash flow information:
Interest, net of amounts capitalized	66,897	26,638	15,554
Income taxes	56,909	43,880	22,275
Supplemental disclosure of noncash investing activities:
Acquisition of SPO	0	0	162,648
Purchase of four vessels	0	14,265	0
Warrants issued for SPO acquisition	0	0	162,648
Repurchase of SPO Acquisition Warrants	0	0	1,365
Debt incurred for the purchase of four vessels	$ 0	$ 15,235	$ 0