Segment Reporting - Reconciliation of Net Income To Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net income	$ 83,317	$ 62,395	$ 47,547	$ 77,267	$ 51,428	$ 59,321	$ 193,259	$ 188,016
Income tax provision	24,385			15,836			62,067	46,156
Interest income and other	(5,147)			(7,771)			(3,221)	(10,418)
Interest expense	4,474			2,378			10,435	7,468
Total Adjusted Segment EBITDA	145,657			128,767			397,382	362,974
Segment Reconciling Items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net income	83,317			77,267			193,259	188,016
Income tax provision	24,385			15,836			62,067	46,156
Interest income and other	(5,147)			(7,771)			(3,221)	(10,418)
Interest expense	4,474			2,378			10,435	7,468
Unallocated corporate expenses	27,589			30,470			101,349	99,524
Segment depreciation expense	9,699			8,273			28,554	24,909
Amortization of intangible assets	1,340			2,314			4,939	7,319
Total Adjusted Segment EBITDA	$ 145,657			$ 128,767			$ 397,382	$ 362,974