Condensed Consolidated Statements Of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance at Dec. 31, 2021	$ 4	$ 662,996	$ (263,342)	$ (24,440)	$ (5,050)	$ 370,168
Balance, shares at Dec. 31, 2021	41,105
Balance, shares at Dec. 31, 2021				(4,011)
Net (loss) income			5,309			5,309
Other comprehensive income (loss)					6,163	6,163
Cash dividends			(930)			(930)
Purchase of treasury stock				$ (1,097)		(1,097)
Purchase of treasury stock, shares				(51)
Stock-based compensation expense		3,367				3,367
Proceeds from exercise of options		126				126
Proceeds from exercise of options, shares	167
Balance at Mar. 31, 2022	$ 4	666,489	(258,963)	$ (25,537)	1,113	383,106
Balance, shares at Mar. 31, 2022	41,272
Balance, shares at Mar. 31, 2022				(4,062)
Balance at Dec. 31, 2021	$ 4	662,996	(263,342)	$ (24,440)	(5,050)	370,168
Balance, shares at Dec. 31, 2021	41,105
Balance, shares at Dec. 31, 2021				(4,011)
Net (loss) income						9,073
Other comprehensive income (loss)						(10,847)
Balance at Jun. 30, 2022	$ 4	670,586	(256,130)	$ (25,537)	(15,897)	373,026
Balance, shares at Jun. 30, 2022	41,328
Balance, shares at Jun. 30, 2022				(4,062)
Balance at Mar. 31, 2022	$ 4	666,489	(258,963)	$ (25,537)	1,113	383,106
Balance, shares at Mar. 31, 2022	41,272
Balance, shares at Mar. 31, 2022				(4,062)
Net (loss) income			3,764			3,764
Other comprehensive income (loss)					(17,010)	(17,010)
Cash dividends			(931)			(931)
Stock-based compensation expense		3,555				3,555
Proceeds from exercise of options		542				542
Proceeds from exercise of options, shares	56
Balance at Jun. 30, 2022	$ 4	670,586	(256,130)	$ (25,537)	(15,897)	373,026
Balance, shares at Jun. 30, 2022	41,328
Balance, shares at Jun. 30, 2022				(4,062)
Balance at Dec. 31, 2022	$ 4	679,339	(336,843)	$ (32,707)	(17,685)	292,108
Balance, shares at Dec. 31, 2022	41,637
Balance, shares at Dec. 31, 2022				(4,589)
Net (loss) income			1,598			1,598
Other comprehensive income (loss)					(1,100)	(1,100)
Cash dividends			(930)			(930)
Purchase of treasury stock				$ (118)		(118)
Purchase of treasury stock, shares				(12)
Stock-based compensation expense		1,334				1,334
Proceeds from exercise of options, shares	154
Balance at Mar. 31, 2023	$ 4	680,673	(336,175)	$ (32,825)	(18,785)	292,892
Balance, shares at Mar. 31, 2023	41,791
Balance, shares at Mar. 31, 2023				(4,601)
Balance at Dec. 31, 2022	$ 4	679,339	(336,843)	$ (32,707)	(17,685)	292,108
Balance, shares at Dec. 31, 2022	41,637
Balance, shares at Dec. 31, 2022				(4,589)
Net (loss) income						(493)
Other comprehensive income (loss)						(2,464)
Balance at Jun. 30, 2023	$ 4	682,243	(339,196)	$ (32,929)	(20,149)	289,973
Balance, shares at Jun. 30, 2023	41,833
Balance, shares at Jun. 30, 2023				(4,612)
Balance at Mar. 31, 2023	$ 4	680,673	(336,175)	$ (32,825)	(18,785)	292,892
Balance, shares at Mar. 31, 2023	41,791
Balance, shares at Mar. 31, 2023				(4,601)
Net (loss) income			(2,091)			(2,091)
Other comprehensive income (loss)					(1,364)	(1,364)
Cash dividends			(930)			(930)
Purchase of treasury stock				$ (104)		(104)
Purchase of treasury stock, shares				(11)
Stock-based compensation expense		1,535				1,535
Proceeds from exercise of options		35				35
Proceeds from exercise of options, shares	42
Balance at Jun. 30, 2023	$ 4	$ 682,243	$ (339,196)	$ (32,929)	$ (20,149)	$ 289,973
Balance, shares at Jun. 30, 2023	41,833
Balance, shares at Jun. 30, 2023				(4,612)