CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net income (loss)	$ 55,637	$ (10,838)	$ (87,784)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization, excluding amortization of deferred recertification and dry dock costs	137,202	138,423	128,725
Amortization of deferred recertification and dry dock costs	36,090	25,693	13,961
Deferred recertification and dry dock costs	(35,387)	(62,522)	(35,072)
Payment of earnout consideration	(58,300)
Change in fair value of contingent consideration		42,246	16,054
Amortization of debt discount	218	17
Amortization of debt issuance costs	2,132	2,485	2,334
Share-based compensation	7,266	6,510	7,451
Deferred income taxes	10,606	11,532	4,386
Equity in earnings of investment			(8,262)
(Gain) loss on disposition of assets, net	479	(367)
Losses related to convertible senior notes	20,922	37,277
Unrealized foreign currency loss	623	8,310	21,596
Changes in operating assets and liabilities:
Accounts receivable, net	13,736	(64,520)	(29,865)
Other current assets	1,139	(22,597)	7,593
Income tax receivable, net of income tax payable	1,919	(418)	(49)
Accounts payable and accrued liabilities	(9,159)	31,996	9,807
Other, net	905	9,230	233
Net cash provided by operating activities	186,028	152,457	51,108
Cash flows from investing activities:
Alliance acquisition, net of cash acquired			(112,625)
Capital expenditures	(23,303)	(19,588)	(33,504)
Distribution from equity investment, net			7,840
Proceeds from sale of assets	100	365
Proceeds from insurance recoveries	363	564
Net cash used in investing activities	(22,840)	(18,659)	(138,289)
Cash flows from financing activities:
Proceeds from senior notes, net of discount		298,578
Payments related to convertible senior notes	(60,720)	(261,147)	(35,000)
Repayment of MARAD Debt	(8,749)	(8,333)	(7,937)
Proceeds from settlement of capped calls	4,381	15,591
Debt issuance costs	(1,530)	(6,817)	(580)
Repurchases of common stock	(29,620)	(11,988)
Payments related to tax withholding for share-based compensation	(4,231)	(1,757)	(1,902)
Proceeds from issuance of ESPP shares	1,859	982	575
Payment of earnout consideration	(26,700)
Net cash provided by (used in) financing activities	(125,310)	25,109	(44,844)
Effect of exchange rate changes on cash and cash equivalents	(2,039)	(15,827)	(5,991)
Net increase (decrease) in cash and cash equivalents	35,839	143,080	(138,016)
Cash and cash equivalents:
Balance, beginning of year	332,191	189,111	327,127
Balance, end of year	$ 368,030	$ 332,191	$ 189,111