Segment Information (Segment Reconciliation to Totals reported in the accompanying Consolidated Financial Statements) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Operating income	$ 18,608	$ 13,513
Other general and administrative expenses	24,531	24,077
Depreciation and amortization	3,447	3,521
Interest income	(106)	(58)
Interest expense	2,461	1,820
Income before income taxes	16,253	11,751
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income	$ 46,586	$ 41,111