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Segment Information (Segment Reconciliation to Totals reported in the accompanying Consolidated Financial Statements) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Operating income	$ 22,839	$ 17,516	$ 62,986	$ 47,923
Other general and administrative expenses	26,798	24,030	77,048	72,220
Depreciation and amortization	3,620	3,441	10,449	10,571
Interest income	(580)	(83)	(977)	(249)
Interest expense	3,199	2,472	7,991	6,278
Income before income taxes	20,220	15,127	55,972	41,894
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	$ 53,257	$ 44,987	$ 150,483	$ 130,714

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