Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ 17,495	$ (90,493)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	120,013	102,590
Amortization of debt issuance costs	1,840	1,744
Share-based compensation	4,765	5,630
Deferred income taxes	6,940	2,876
Equity in earnings of investment		(8,262)
Gain on disposition of assets, net	(367)
Unrealized foreign currency loss	11,587	38,374
Change in fair value of contingent consideration	31,319	2,664
Changes in operating assets and liabilities:
Accounts receivable, net	(96,027)	(50,268)
Other current assets	(16,774)	(19,888)
Income tax payable, net of income tax receivable	(2,518)	1,818
Accounts payable and accrued liabilities	31,142	42,953
Deferred recertification and dry dock costs, net	(59,216)	(25,583)
Other, net	7,521	(2,759)
Net cash provided by operating activities	57,720	1,396
Cash flows from investing activities:
Alliance acquisition, net of cash acquired		(112,625)
Capital expenditures	(16,165)	(4,990)
Distribution from equity investment, net		7,840
Proceeds from sale of assets	365
Net cash used in investing activities	(15,800)	(109,775)
Cash flows from financing activities:
Payments related to convertible senior notes	(30,415)	(35,000)
Debt issuance costs	(236)	(550)
Repurchases of common stock	(11,988)
Payments related to tax withholding for share-based compensation	(1,385)	(1,525)
Proceeds from issuance of ESPP shares	982	575
Net cash used in financing activities	(51,375)	(44,437)
Effect of exchange rate changes on cash and cash equivalents and restricted cash	(11,286)	(9,537)
Net decrease in cash and cash equivalents and restricted cash	(20,741)	(162,353)
Cash and cash equivalents and restricted cash:
Balance, beginning of year	189,111	327,127
Balance, end of period	168,370	164,774
MARAD Debt (matures February 2027)
Cash flows from financing activities:
Repayment of loan debt	$ (8,333)	$ (7,937)