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Segment Reporting - Changes in Goodwill by Reportable Segment (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Goodwill [Line Items]    
Goodwill, Beginning Balance $ 6,902,297 $ 6,187,643
Goodwill acquired 54,359 293,508
Goodwill acquisition adjustments (3,021) 4,107
Impact of changes in foreign currency 38,831 (27,348)
Goodwill, Ending Balance 6,992,466 6,457,910
Southern | Reportable Segments    
Goodwill [Line Items]    
Goodwill, Beginning Balance 1,547,894 1,457,437
Goodwill acquired 0 0
Goodwill acquisition adjustments (1,493) 0
Impact of changes in foreign currency 0 0
Goodwill, Ending Balance 1,546,401 1,457,437
Western | Reportable Segments    
Goodwill [Line Items]    
Goodwill, Beginning Balance 732,335 503,223
Goodwill acquired 45,072 0
Goodwill acquisition adjustments 0 2,999
Impact of changes in foreign currency 0 0
Goodwill, Ending Balance 777,407 506,222
Central | Reportable Segments    
Goodwill [Line Items]    
Goodwill, Beginning Balance 1,003,470 931,269
Goodwill acquired 4,026 5,976
Goodwill acquisition adjustments 0 0
Impact of changes in foreign currency 0 0
Goodwill, Ending Balance 1,007,496 937,245
Eastern | Reportable Segments    
Goodwill [Line Items]    
Goodwill, Beginning Balance 1,189,111 992,578
Goodwill acquired 3,895 121,041
Goodwill acquisition adjustments 0 0
Impact of changes in foreign currency 0 0
Goodwill, Ending Balance 1,193,006 1,113,619
Canada | Reportable Segments    
Goodwill [Line Items]    
Goodwill, Beginning Balance 1,684,670 1,559,512
Goodwill acquired 0 166,491
Goodwill acquisition adjustments (1,528) 0
Impact of changes in foreign currency 38,831 (27,348)
Goodwill, Ending Balance 1,721,973 1,698,655
MidSouth | Reportable Segments    
Goodwill [Line Items]    
Goodwill, Beginning Balance 744,817 743,624
Goodwill acquired 1,366 0
Goodwill acquisition adjustments 0 1,108
Impact of changes in foreign currency 0 0
Goodwill, Ending Balance $ 746,183 $ 744,732