Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income
Beginning balance (in shares) at Dec. 31, 2020		11,727,000
Beginning balance at Dec. 31, 2020	$ 635,003	$ 1,181	$ 118,528	$ (4,566)	$ 560,186	$ (40,326)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	71,581				80,245	(8,664)
Stock-based compensation expense	5,987		5,987
Stock-based compensation transactions (in shares)		64,000
Stock-based compensation transactions	(281)	$ 6	(287)
Dividends paid	(6,627)				(6,627)
Ending balance (in shares) at Dec. 31, 2021		11,791,000
Ending balance at Dec. 31, 2021	705,663	$ 1,187	124,228	(4,566)	633,804	(48,990)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	82,650				101,928	(19,278)
Stock-based compensation expense	5,561		5,561
Stock-based compensation transactions (in shares)		40,000
Stock-based compensation transactions	35	$ 4	31
Dividends paid	$ (8,549)				(8,549)
Ending balance (in shares) at Dec. 31, 2022	11,913,890	11,831,000
Ending balance at Dec. 31, 2022	$ 785,360	$ 1,191	129,820	(4,566)	727,183	(68,268)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	149,912				136,161	13,751
Stock-based compensation expense	7,424		7,424
Stock-based compensation transactions (in shares)		51,000
Stock-based compensation transactions	552	$ 5	547
Dividends paid	$ (10,485)				(10,485)
Ending balance (in shares) at Dec. 31, 2023	11,964,181	11,882,000
Ending balance at Dec. 31, 2023	$ 932,763	$ 1,196	$ 137,791	$ (4,566)	$ 852,859	$ (54,517)