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Segment Information - Summarized Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 2,764,095	$ 2,807,259
Operating income (loss)	80,737	119,487
Depreciation	54,410	52,216
Corporate and Non-Allocated Costs
Segment Reporting Information [Line Items]
Operating income (loss)	(79,298)	(82,829)
Depreciation	4,162	4,410
Electric Power Infrastructure Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,767,027	1,664,023
Operating income (loss)	128,758	161,617
Depreciation	28,713	25,251
Pipeline and Industrial Infrastructure Services Division | Operating Segments
Segment Reporting Information [Line Items]
Revenues	997,068	1,143,236
Operating income (loss)	31,277	40,699
Depreciation	$ 21,535	$ 22,555

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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