Segment Reporting - Summary of Geographic Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Amount	$ 6,637,995	$ 5,860,615	$ 4,742,115
Revenue from contract with customer	4,753,804	4,173,711	3,197,223
Assets:
Amount	44,012,166	37,893,233
United States
Revenues:
Amount	5,521,933	4,843,417	3,766,707
Revenue from contract with customer	3,811,915	3,325,466	2,389,257
Assets:
Amount	36,929,186	31,740,907
United Kingdom
Revenues:
Amount	606,750	558,308	552,650
Revenue from contract with customer	447,219	401,195	396,610
Assets:
Amount	3,587,230	3,476,793
Canada
Revenues:
Amount	509,312	458,890	422,758
Revenue from contract with customer	494,670	447,050	$ 411,356
Assets:
Amount	$ 3,495,750	$ 2,675,533
Revenue | Geographic Concentration Risk
Assets:
Percentage	100.00%	100.00%	100.00%
Revenue | United States | Geographic Concentration Risk
Assets:
Percentage	83.20%	82.60%	79.40%
Revenue | United Kingdom | Geographic Concentration Risk
Assets:
Percentage	9.10%	9.50%	11.70%
Revenue | Canada | Geographic Concentration Risk
Assets:
Percentage	7.70%	7.90%	8.90%
Revenue from Contract with Customer | Geographic Concentration Risk
Assets:
Percentage	100.00%	100.00%	100.00%
Revenue from Contract with Customer | United States | Geographic Concentration Risk
Assets:
Percentage	80.20%	79.70%	74.70%
Revenue from Contract with Customer | United Kingdom | Geographic Concentration Risk
Assets:
Percentage	9.40%	9.60%	12.40%
Revenue from Contract with Customer | Canada | Geographic Concentration Risk
Assets:
Percentage	10.40%	10.70%	12.90%
Assets | Geographic Concentration Risk
Assets:
Percentage	100.00%	100.00%
Assets | United States | Geographic Concentration Risk
Assets:
Percentage	83.90%	83.80%
Assets | United Kingdom | Geographic Concentration Risk
Assets:
Percentage	8.20%	9.20%
Assets | Canada | Geographic Concentration Risk
Assets:
Percentage	7.90%	7.00%