Segment and Geographic Area Information - Revenue by segment information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) segment	Jun. 30, 2023 USD ($)
Segment information
Number of segments | segment			3
Revenue	$ 245,653	$ 272,938	$ 504,464	$ 546,558
Cost of revenue (exclusive of depreciation and amortization)	187,964	212,059	389,952	428,526
Segment profit	57,689	60,879	114,512	118,032
Selling, general and administrative expenses (exclusive of depreciation and amortization)	41,778	32,026	82,632	76,407
Depreciation and amortization	14,983	14,890	28,490	31,450
Related party expense	3,282	2,739	5,673	5,851
Interest expense, net	23,129	45,092	44,217	89,272
Debt modification and extinguishment costs (gain), net		(6,785)		(15,558)
Sundry expense, net	(204)	1,500	1,677	2,248
Other income, net	(423)	(232)	(874)	(514)
Loss before income taxes	(24,856)	(28,351)	(47,303)	(71,124)
I T P S Segment
Segment information
Revenue	156,840	184,990	332,980	378,698
Cost of revenue (exclusive of depreciation and amortization)	129,787	150,035	274,199	308,546
Segment profit	27,053	34,955	58,781	70,152
H S Segment
Segment information
Revenue	62,935	63,608	127,787	126,650
Cost of revenue (exclusive of depreciation and amortization)	42,573	47,016	88,729	93,752
Segment profit	20,362	16,592	39,058	32,898
L L P S Segment
Segment information
Revenue	25,878	24,340	43,697	41,210
Cost of revenue (exclusive of depreciation and amortization)	15,604	15,008	27,024	26,228
Segment profit	$ 10,274	$ 9,332	$ 16,673	$ 14,982