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Segment Information (Segment Reconciliation to Totals reported in the accompanying Consolidated Financial Statements) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |
Operating income | $ 68,737 | $ 65,936 | $ 44,507
Other general and administrative expenses | 96,417 | 87,508 | 80,044
Depreciation and amortization | 14,060 | 14,494 | 12,051
Interest income | (341) | (268) | (624)
Interest expense | 8,907 | 5,806 | 3,189
Income before income taxes | 60,171 | 60,398 | 41,942
Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income | $ 179,214 | $ 167,938 | $ 136,602

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