Earnings Per Share Information (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares
Earnings Per Share [Abstract]
Net income | $	$ 72,140	$ 61,290	$ 65,699
Weighted-average shares, basic
Outstanding	42,192,411	43,890,081	45,081,254
Partially-paid share subscriptions	1,259,250	557,594	0
Basic weighted-average shares	43,451,661	44,447,675	45,081,254
Weighted-average shares, diluted
Exercise of stock subscription purchase rights	37,638	0	0
Exercise of stock options and awards	2,048,399	2,289,696	2,508,822
Diluted weighted-average shares	45,537,698	46,737,371	47,590,076
Earnings per share--basic | $ / shares	$ 1.66	$ 1.38	$ 1.46
Earnings per share--diluted | $ / shares	$ 1.58	$ 1.31	$ 1.38
Stock split, conversion ratio	2