Goodwill and Identifiable Intangible Assets, Net - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands |
12 Months Ended | |
---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
Changes in the carrying amount of goodwill | ||
Balance at beginning of year | $ 332,447 | $ 235,182 |
Acquisitions and purchase price adjustments (See Note 5) | 131,945 | 97,265 |
Balance at end of period | 464,392 | 332,447 |
Mechanical Services Segment | ||
Changes in the carrying amount of goodwill | ||
Balance at beginning of year | 234,660 | 235,182 |
Acquisitions and purchase price adjustments (See Note 5) | 72,788 | 579 |
Impact of segment reorganization | (1,101) | |
Balance at end of period | 307,448 | 234,660 |
Accumulated impairment charges | 116,600 | 116,600 |
Electrical Services | ||
Changes in the carrying amount of goodwill | ||
Balance at beginning of year | 97,787 | |
Acquisitions and purchase price adjustments (See Note 5) | 59,157 | 96,686 |
Impact of segment reorganization | 1,101 | |
Balance at end of period | $ 156,944 | $ 97,787 |