Segment Reporting - Reconciliation of Net Income To Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net income	$ 235,514	$ 234,966	$ 210,682
Income tax provision	62,235	62,981	51,764
Interest income and other	(3,918)	(6,193)	412
Interest expense	10,047	20,294	19,805
Adjusted Segment EBITDA	478,790	455,265	423,624
Segment Reconciling Items
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net income	235,514	234,966	210,682
Income tax provision	62,235	62,981	51,764
Interest income and other	(3,918)	(6,193)	412
Interest expense	10,047	20,294	19,805
Unallocated corporate expenses	124,830	104,457	94,463
Segment depreciation expense	32,876	31,072	29,381
Amortization of intangible assets	9,642	10,818	10,387
Segment special charges	7,564	0	6,730
Remeasurement of acquisition-related contingent consideration	0	(3,130)	0
Adjusted Segment EBITDA	$ 478,790	$ 455,265	$ 423,624