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Segment Information - Summarized Financial Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 11,202,672	$ 12,112,153	$ 11,171,423
Operating income (loss)	611,371	554,874	540,269
Depreciation	225,256	218,107	202,519
Operating Segments | Electric Power Infrastructure Solutions
Segment Reporting Information [Line Items]
Revenues	7,773,343	7,121,837	6,415,562
Operating income (loss)	826,325	591,177	628,286
Depreciation	121,848	108,295	96,300
Operating Segments | Underground Utility and Infrastructure Solutions
Segment Reporting Information [Line Items]
Revenues	3,429,329	4,990,316	4,755,861
Operating income (loss)	170,074	332,011	204,178
Depreciation	85,981	90,953	89,046
Corporate and Non-Allocated
Segment Reporting Information [Line Items]
Operating income (loss)	(385,028)	(368,314)	(292,195)
Depreciation	$ 17,427	$ 18,859	$ 17,173

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