Consolidated Statements of Cash Flows - USD ($) $ in Thousands	2 Months Ended	5 Months Ended	7 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2024	Jul. 29, 2024	Dec. 31, 2025	Dec. 31, 2023
Cash flows from operating activities:
Net loss	$ (105,452)	$ (105,452)		$ (87,116)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	47,313	47,313	$ 45,777	178,330	$ 94,818
Noncash lease expense	3,667			16,610
Share-based compensation expense	64,626			17,155
Amortization of deferred financing costs	1,366			5,350
Loss on extinguishment of debt	0	0		0
Fair value adjustments on interest rate derivatives	0			0
Deferred taxes	(13,983)			(32,966)
Other	2,200			2,946
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable	18,400			41,078
Contract assets	9,382			(5,550)
Prepaid expenses and other current assets	(9,380)			(4,590)
Accounts payable	(4,479)			(1,435)
Accrued expenses and other current liabilities	(7,892)			(12,190)
Operating lease obligations	(3,429)			(15,979)
Contract liabilities	17			(1,486)
Other assets and liabilities	273			(5,139)
Net cash provided by operating activities	2,629			95,018
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(1,822,186)			(845,018)
Purchases of property and equipment	(13,241)			(33,758)
Proceeds from sale of property and equipment	776			4,687
Net cash used in investing activities	(1,834,651)			(874,089)
Cash flows from financing activities:
Proceeds from long-term borrowings	775,000			875,000
Payments on long-term borrowings	(1,938)			(12,128)
Payments of debt issuance costs	(21,355)			(24,331)
Payments on finance lease obligations and other long-term debt	(3,991)			(13,267)
Dividends paid to stockholder	0			0
Proceeds from issuance of common shares and exercise of warrants, net of issuance costs	666,630			250,454
Net cash provided by (used in) financing activities	1,414,346			1,075,728
Net effect of exchange rate fluctuations on cash and cash equivalents	(123)			3,745
Net change in cash and cash equivalents	(417,799)			300,402
Cash and Cash Equivalents
Beginning of period	556,933	556,933		139,134
End of period	$ 139,134	139,134		439,536
Supplemental disclosure of cash flow information
Interest paid		36,984		80,804
Income taxes paid		12,334		27,768
Supplemental disclosure of non-cash operating, investing, and financing activities:
Equity consideration issued for business combinations		4,000		798,048
Purchase of property and equipment accrued and not yet paid		1,606		6,506
Notes payable and other obligations issued for acquisitions		0		6,741
Settlement of derivative liability		967		0
Increases in Lease Assets in Exchange for Lease Liabilities [Abstract]
Operating leases		5,575		44,935
Finance leases		$ 4,673		$ 21,454
Predecessor
Cash flows from operating activities:
Net loss			(15,703)		(6,289)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization			45,777		94,818
Noncash lease expense			5,453		9,992
Share-based compensation expense			17,858		4,975
Amortization of deferred financing costs			2,406		3,586
Loss on extinguishment of debt			9,073		0
Fair value adjustments on interest rate derivatives			3,102		7,244
Deferred taxes			(8,376)		(23,442)
Other			(180)		1,275
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable			(32,576)		(6,260)
Contract assets			(221)		7,141
Prepaid expenses and other current assets			(2,829)		(3,243)
Accounts payable			(9,691)		2,917
Accrued expenses and other current liabilities			17,669		6,111
Operating lease obligations			(5,751)		(9,284)
Contract liabilities			179		(153)
Other assets and liabilities			(5,751)		6,421
Net cash provided by operating activities			20,439		95,809
Cash flows from investing activities:
Business acquisitions, net of cash acquired			(44,680)		(6,010)
Purchases of property and equipment			(14,334)		(22,141)
Proceeds from sale of property and equipment			1,029		1,617
Net cash used in investing activities			(57,985)		(26,534)
Cash flows from financing activities:
Proceeds from long-term borrowings			30,000		195,000
Payments on long-term borrowings			(16,346)		(81,384)
Payments of debt issuance costs			0		(2,844)
Payments on finance lease obligations and other long-term debt			(5,836)		(9,948)
Dividends paid to stockholder			0		(150,000)
Proceeds from issuance of common shares and exercise of warrants, net of issuance costs			0		0
Net cash provided by (used in) financing activities			7,818		(49,176)
Net effect of exchange rate fluctuations on cash and cash equivalents			(7,877)		4,377
Net change in cash and cash equivalents			(37,605)		24,476
Cash and Cash Equivalents
Beginning of period			87,061		62,585
End of period			49,456		87,061
Supplemental disclosure of cash flow information
Interest paid			32,332		60,355
Income taxes paid			14,579		29,761
Supplemental disclosure of non-cash operating, investing, and financing activities:
Equity consideration issued for business combinations			0		0
Purchase of property and equipment accrued and not yet paid			2,434		2,147
Notes payable and other obligations issued for acquisitions			0		0
Settlement of derivative liability			0		0
Increases in Lease Assets in Exchange for Lease Liabilities [Abstract]
Operating leases			6,748		6,949
Finance leases			$ 5,988		$ 11,049