Interim Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	AdditionalPaid-in Capital	Treasury Stock	Retained Earnings	AccumulatedOtherComprehensive Loss
Beginning balance ( in shares) at Dec. 31, 2021		11,791,000
Beginning 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	22,195				18,470	3,725
Stock-based compensation expense	1,371		1,371
Stock-based compensation transactions (in shares)		20,000
Stock-based compensation transactions	84	$ 2	82
Dividends paid	(2,133)				(2,133)
Ending balance (in shares) at Mar. 31, 2022		11,811,000
Ending balance at Mar. 31, 2022	727,180	$ 1,189	125,681	(4,566)	650,141	(45,265)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	9,900				28,472	(18,572)
Stock-based compensation expense	1,750		1,750
Stock-based compensation transactions (in shares)		15,000
Stock-based compensation transactions	(249)	$ 2	(251)
Dividends paid	(2,139)				(2,139)
Ending balance (in shares) at Jun. 30, 2022		11,826,000
Ending balance at Jun. 30, 2022	736,442	$ 1,191	127,180	(4,566)	676,474	(63,837)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	1,128				25,821	(24,693)
Stock-based compensation expense	1,508		1,508
Stock-based compensation transactions (in shares)		1,000
Stock-based compensation transactions	92	$ 0	92
Dividends paid	(2,139)				(2,139)
Ending balance (in shares) at Sep. 30, 2022		11,827,000
Ending balance at Sep. 30, 2022	$ 737,031	$ 1,191	128,780	(4,566)	700,156	(88,530)
Beginning balance ( in shares) at Dec. 31, 2022	11,913,890	11,831,000
Beginning 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	37,763				33,349	4,414
Stock-based compensation expense	1,699		1,699
Stock-based compensation transactions (in shares)		28,000
Stock-based compensation transactions	141	$ 3	138
Dividends paid	(2,615)				(2,615)
Ending balance (in shares) at Mar. 31, 2023		11,859,000
Ending balance at Mar. 31, 2023	822,348	$ 1,194	131,657	(4,566)	757,917	(63,854)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	44,273				36,374	7,899
Stock-based compensation expense	1,869		1,869
Stock-based compensation transactions (in shares)		17,000
Stock-based compensation transactions	74	$ 2	72
Dividends paid	(2,622)				(2,622)
Ending balance (in shares) at Jun. 30, 2023		11,876,000
Ending balance at Jun. 30, 2023	865,942	$ 1,196	133,598	(4,566)	791,669	(55,955)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	22,443				34,915	(12,472)
Stock-based compensation expense	1,805		1,805
Stock-based compensation transactions (in shares)		4,000
Stock-based compensation transactions	168		168
Dividends paid	$ (2,624)				(2,624)
Ending balance (in shares) at Sep. 30, 2023	11,962,295	11,880,000
Ending balance at Sep. 30, 2023	$ 887,734	$ 1,196	$ 135,571	$ (4,566)	$ 823,960	$ (68,427)