Goodwill and Intangibles - Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended	9 Months Ended	10 Months Ended	12 Months Ended	13 Months Ended
	Sep. 03, 2024	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2025	Sep. 30, 2025	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2025
Goodwill [Roll Forward]
Goodwill, Beginning Balance		$ 33,034		$ 33,034	$ 33,034		$ 16,374
Measurement period adjustments				100
Goodwill, Ending Balance			$ 33,034		69,745	$ 69,745	33,034	$ 69,745
Industrial Air Transaction
Goodwill [Roll Forward]
Measurement period adjustments							59
Kent Island Mechanical, Inc.
Goodwill [Roll Forward]
Measurement period adjustments		100	700		94		700	765
Goodwill associated with acquisition							5,484
Goodwill, Ending Balance	$ 4,813				5,578	5,578		5,578
Consolidated Mechanical
Goodwill [Roll Forward]
Measurement period adjustments				100	3	3
Goodwill associated with acquisition							11,117
Goodwill, Ending Balance					11,120	11,120		11,120
Pioneer Power Inc.
Goodwill [Roll Forward]
Goodwill associated with acquisition							36,614
GCR
Goodwill [Roll Forward]
Goodwill, Beginning Balance		4,244		4,244	4,244		0
Goodwill, Ending Balance			4,244		15,322	15,322	4,244	15,322
GCR | Industrial Air Transaction
Goodwill [Roll Forward]
Measurement period adjustments							0
GCR | Kent Island Mechanical, Inc.
Goodwill [Roll Forward]
Measurement period adjustments					94
Goodwill associated with acquisition							4,244
GCR | Consolidated Mechanical
Goodwill [Roll Forward]
Measurement period adjustments					0
Goodwill associated with acquisition							0
GCR | Pioneer Power Inc.
Goodwill [Roll Forward]
Goodwill associated with acquisition							10,984
ODR
Goodwill [Roll Forward]
Goodwill, Beginning Balance		$ 28,790		$ 28,790	28,790		16,374
Goodwill, Ending Balance			$ 28,790		54,423	$ 54,423	28,790	$ 54,423
ODR | Industrial Air Transaction
Goodwill [Roll Forward]
Measurement period adjustments							59
ODR | Kent Island Mechanical, Inc.
Goodwill [Roll Forward]
Measurement period adjustments					0
Goodwill associated with acquisition							1,240
ODR | Consolidated Mechanical
Goodwill [Roll Forward]
Measurement period adjustments					$ 3
Goodwill associated with acquisition							11,117
ODR | Pioneer Power Inc.
Goodwill [Roll Forward]
Goodwill associated with acquisition							$ 25,630