Goodwill and Identifiable Intangible Assets, Net (Tables)

3 Months Ended

Mar. 31, 2021

Goodwill and Identifiable Intangible Assets, Net

Schedule of changes in the carrying amount of goodwill

The changes in the carrying amount of goodwill are as follows (in thousands):

	Mechanical Services		Electrical Services
	Segment		Segment		Total
Balance at December 31, 2019	$	234,660	$	97,787	$	332,447
Acquisitions and purchase price adjustments (See Note 5)		72,788		59,157		131,945
Balance at December 31, 2020		307,448		156,944		464,392
Acquisitions and purchase price adjustments (See Note 5)		7,726		660		8,386
Impact of segment reorganization		1,101		(1,101)		—
Balance at March 31, 2021	$	316,275	$	156,503	$	472,778

Schedule of future amortization expense of identifiable intangible assets

At March 31, 2021, future amortization expense of identifiable intangible assets is as follows (in thousands):

Year ended December 31—
2021 (remainder of the year)	$	25,738
2022		28,400
2023		24,217
2024		22,867
2025		20,680
Thereafter		108,506
Total	$	230,408