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Segment Information - Summarized Financial Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Segment Reporting Information [Line Items]    
Revenues $ 6,233,334 $ 5,031,819
Segment operating expense (excluding segment depreciation expense) 5,668,852 4,611,166
Segment depreciation expense 92,380 83,228
Segment operating expenses 5,761,232 4,694,394
Equity in earnings of integral unconsolidated affiliates 12,929 12,334
Segment operating income 485,031 349,759
Total consolidated operating income 239,081 155,354
Non-cash stock-based compensation 38,151 35,331
Corporate and Non-Allocated Costs    
Segment Reporting Information [Line Items]    
Corporate and non-allocated costs (245,950) (194,405)
Amortization 109,600 77,500
Non-cash stock-based compensation 38,200 35,300
Electric    
Segment Reporting Information [Line Items]    
Revenues 4,944,391 3,911,124
Segment operating expense (excluding segment depreciation expense) 4,482,845 3,562,345
Segment depreciation expense 66,311 58,242
Segment operating expenses 4,549,156 3,620,587
Equity in earnings of integral unconsolidated affiliates 12,929 12,334
Segment operating income $ 408,164 $ 302,871
Segment operating margin 8.30% 7.70%
Underground and Infrastructure (1)    
Segment Reporting Information [Line Items]    
Revenues $ 1,288,943 $ 1,120,695
Segment operating expense (excluding segment depreciation expense) 1,186,007 1,048,821
Segment depreciation expense 26,069 24,986
Segment operating expenses 1,212,076 1,073,807
Equity in earnings of integral unconsolidated affiliates 0 0
Segment operating income $ 76,867 $ 46,888
Segment operating margin 6.00% 4.20%
Loss on disposition of non-core business   $ 10,700
Underground and Infrastructure (1) | 2025 Acquisitions    
Segment Reporting Information [Line Items]    
Segment operating expense (excluding segment depreciation expense) $ 4,200