Share Repurchase Program (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Aug. 03, 2007
Share Repurchase Program
Share Repurchase Program	$ 200,000			$ 30,000
Number of common shares purchased during period under the program	170,904	139,405	551,598
Acquisition of treasury stock	$ 14,603	$ 11,563	$ 39,999
Treasury stock shares repurchased and reissued	3,141,477
Treasury stock repurchased and reissued, at cost	$ 150,000
Treasury stock shares	3,083,364	2,970,573
Treasury stock, at cost	$ 145,000	$ 135,397