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Segment Information - Summary of Assets Allocation by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	$ 995,859	$ 1,007,871
General Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	312,228	287,381
T&D | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	269,721	306,226
C&I | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	$ 413,910	$ 414,264

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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