Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income
Beginning balance (in shares) at Dec. 31, 2019		11,670
Beginning balance at Dec. 31, 2019	$ 577,943	$ 1,175	$ 113,666	$ (4,566)	$ 508,506	$ (40,838)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	58,316				57,804	512
Stock-based compensation expense	4,119		4,119
Stock-based compensation transactions (in shares)		57
Stock-based compensation transactions	749	$ 6	743
Dividends paid	(6,124)				(6,124)
Ending balance (in shares) at Dec. 31, 2020		11,727
Ending 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
Stock-based compensation transactions	(281)	$ 6	(287)
Dividends paid	(6,627)				(6,627)
Ending balance (in shares) at Dec. 31, 2021		11,791
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
Stock-based compensation transactions	35	$ 4	31
Dividends paid	(8,549)				(8,549)
Ending balance (in shares) at Dec. 31, 2022		11,831
Ending balance at Dec. 31, 2022	$ 785,360	$ 1,191	$ 129,820	$ (4,566)	$ 727,183	$ (68,268)