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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, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting, Other Significant Reconciling Item [Line Items]      
Net income $ 234,966 $ 210,682 $ 216,726
Income tax provision 62,981 51,764 71,724
Interest income and other (6,193) 412 (2,061)
Interest expense 20,294 19,805 19,206
Adjusted Segment EBITDA 455,265 423,624 439,514
Segment Reconciling Items      
Segment Reporting, Other Significant Reconciling Item [Line Items]      
Net income 234,966 210,682 216,726
Income tax provision 62,981 51,764 71,724
Interest income and other (6,193) 412 (2,061)
Interest expense 20,294 19,805 19,206
Unallocated corporate expenses 104,457 94,463 98,398
Segment depreciation expense 31,072 29,381 27,369
Amortization of intangible assets 10,818 10,387 8,152
Segment special charges 0 6,730 0
Remeasurement of acquisition-related contingent consideration (3,130) 0 0
Adjusted Segment EBITDA $ 455,265 $ 423,624 $ 439,514