Interim Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Loss
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	15,876				17,462	(1,586)
Stock-based compensation expense	1,240		1,240
Stock-based compensation transactions (in shares)		29,000
Stock-based compensation transactions	776	$ 3	773
Dividends paid	(1,654)				(1,654)
Ending balance (in shares) at Mar. 31, 2021		11,756,000
Ending balance at Mar. 31, 2021	651,241	$ 1,184	120,541	(4,566)	575,994	(41,912)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	30,943				26,037	4,906
Stock-based compensation expense	1,316		1,316
Stock-based compensation transactions (in shares)		23,000
Stock-based compensation transactions	(602)	$ 2	(604)
Dividends paid	(1,657)				(1,657)
Ending balance (in shares) at Jun. 30, 2021		11,779,000
Ending balance at Jun. 30, 2021	$ 681,241	$ 1,186	121,253	(4,566)	600,374	(37,006)
Beginning balance ( in shares) at Dec. 31, 2021	11,874,178	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	11,909,064	11,826,000
Ending balance at Jun. 30, 2022	$ 736,442	$ 1,191	$ 127,180	$ (4,566)	$ 676,474	$ (63,837)