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