Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating activities:
Net income	$ 333,453	$ 179,272	$ 95,621
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	151,095	156,166	128,777
Amortization of deferred drydocking and survey costs	111,244	86,604	51,554
Amortization of debt premiums and discounts	5,379	6,741	4,619
Amortization of below market contracts	(1,200)	(5,000)	(3,800)
Unrealized foreign exchange loss (gain)	(23,398)	14,275	945
Deferred income taxes provision (benefit)	(195,816)	(2,807)	92
Gain on asset dispositions, net	(13,682)	(15,762)	(8,701)
Gain on pension settlement	0	0	(2,313)
Loss on early extinguishment of debt	27,113	0	0
Stock-based compensation expense	14,483	13,681	10,755
Changes in operating assets and liabilities, net:
Trade and other receivables	38,433	(55,453)	(109,756)
Marine operating supplies	(4,621)	(2,906)	1,984
Prepaid expenses and other current assets	2,068	1,584	5,813
Accounts payable	(5,038)	26,454	5,985
Accrued expenses	23,275	7,393	20,072
Other current liabilities	(2,712)	13,908	809
Other liabilities	2,329	(2,415)	(740)
Deferred drydocking and survey costs	(98,575)	(133,258)	(97,378)
Other, net	15,278	(6,005)	(144)
Net cash provided by operating activities	379,108	282,472	104,194
Cash flows from investing activities:
Proceeds from asset dispositions	17,619	19,338	15,506
Proceeds from sale of notes	660	8,054	0
Acquisitions, net of cash acquired	0	0	(594,191)
Additions to properties and equipment	(25,761)	(27,580)	(31,588)
Net cash used in investing activities	(7,482)	(188)	(610,273)
Cash flows from financing activities:
Exercise of warrants	0	4	111,483
Issuance of long-term debt	650,000	0	575,000
Principal payments on long-term debt	(641,942)	(103,030)	(13,677)
Purchase of common stock	(90,089)	(90,742)	(35,025)
Payments on finance leases	(6,432)	0	0
Debt extinguishment premium	(19,601)	0	0
Acquisition of non-controlling interest in a majority owned subsidiary	0	0	(1,427)
Debt issuance costs	(19,829)	(213)	(14,758)
Share based awards reacquired to pay taxes	(8,066)	(28,614)	(6,040)
Net cash provided by (used in) financing activities	(135,959)	(222,595)	615,556
Net change in cash, cash equivalents and restricted cash	252,537	51,066	109,988
Cash, cash equivalents and restricted cash at beginning of period	329,031	277,965	167,977
Cash, cash equivalents and restricted cash at end of period	581,568	329,031	277,965
Effects of exchange rate changes on cash, cash equivalents and restricted cash	16,870	(8,623)	511
Supplemental disclosure of cash flow information:
Interest, net of amounts capitalized	47,810	66,897	26,638
Income taxes	60,310	56,909	43,880
Supplemental disclosure of noncash investing activities:
Purchase of vessels	10,727	0	14,265
Recognition of finance leases	28,658	0	0
Debt incurred for the purchase of four vessels	$ 11,479	$ 0	$ 15,235