Segment Information - Summary of Assets Allocation by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	$ 1,121,092	$ 995,859
General Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	408,511	312,228
T&D | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	303,685	269,721
C&I | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	$ 408,896	$ 413,910