Goodwill and Identifiable Intangible Assets, Net - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Changes in the carrying amount of goodwill
Balance at beginning of year	$ 875,270	$ 666,834
Acquisitions and purchase price adjustments (See Note 5)	52,510	208,436
Balance at end of period	927,780	875,270
Mechanical Segment
Changes in the carrying amount of goodwill
Balance at beginning of year	601,512	393,276
Acquisitions and purchase price adjustments (See Note 5)	52,510	208,236
Balance at end of period	654,022	601,512
Electrical Segment
Changes in the carrying amount of goodwill
Balance at beginning of year	273,758	273,558
Acquisitions and purchase price adjustments (See Note 5)		200
Balance at end of period	$ 273,758	$ 273,758