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Segment Information (Segment Reconciliation to Totals reported in the accompanying Consolidated Financial Statements) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Segment Reporting Information [Line Items] |  |  |  |
Operating income | $ 16,894 | $ 17,048 | $ 30,407 | $ 29,218
Other general and administrative expenses | 24,111 | 22,176 | 48,188 | 42,891
Depreciation and amortization | 3,609 | 3,587 | 7,130 | 7,188
Interest income | (108) | (31) | (166) | (53)
Interest expense | 1,986 | 1,262 | 3,806 | 2,478
Income before income taxes | 15,016 | 15,817 | 26,767 | 26,793
Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income | $ 44,614 | $ 42,811 | $ 85,725 | $ 79,297

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