Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in-Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Common Stock in Treasury [Member]	Total	Cumulative Effect Adjustment for ASU Implementation [Member] Common Stock [Member]	Cumulative Effect Adjustment for ASU Implementation [Member] Additional Paid-in-Capital [Member]	Cumulative Effect Adjustment for ASU Implementation [Member] Retained Earnings [Member]	Cumulative Effect Adjustment for ASU Implementation [Member] Accumulated Other Comprehensive (Loss) Income [Member]	Cumulative Effect Adjustment for ASU Implementation [Member] Common Stock in Treasury [Member]	Cumulative Effect Adjustment for ASU Implementation [Member]
Balance at Dec. 31, 2019	$ 497	$ 576,708	$ 696,214	$ (19,026)	$ (133,996)	$ 1,120,397
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	104,388	0	0	104,388
Cash dividends	0	0	(47,207)	0	0	(47,207)
Purchase of treasury shares	0	0	0	0	(7,980)	(7,980)
Net issuance of shares to employee and other stock plans	0	(3,207)	0	0	1,542	(1,665)
Stock-based compensation	0	4,581	0	0	0	4,581
Other comprehensive income (loss)	0	0	0	19,443	0	19,443
Balance at Dec. 31, 2020	497	578,082	749,056	417	(140,434)	1,187,618
Balance (ASU 2016-13 [Member]) at Dec. 31, 2020							$ 0	$ 0	$ (4,339)	$ 0	$ 0	$ (4,339)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	154,885	0	0	154,885
Cash dividends	0	0	(47,738)	0	0	(47,738)
Purchase of treasury shares	0	0	0	0	(21,714)	(21,714)
Net issuance of shares to employee and other stock plans	0	(5,520)	0	0	2,269	(3,251)
Stock-based compensation	0	4,414	0	0	0	4,414
Other comprehensive income (loss)	0	0	0	(23,761)	0	(23,761)
Balance at Dec. 31, 2021	497	576,976	856,203	(23,344)	(159,879)	1,250,453
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	151,995	0	0	151,995
Cash dividends	0	0	(49,765)	0	0	(49,765)
Purchase of treasury shares	0	0	0	0	(14,713)	(14,713)
Net issuance of shares to employee and other stock plans	0	(3,653)	0	0	1,397	(2,256)
Stock-based compensation	0	4,530	0	0	0	4,530
Other comprehensive income (loss)	0	0	0	(166,690)	0	(166,690)
Balance at Dec. 31, 2022	$ 497	$ 577,853	$ 958,433	$ (190,034)	$ (173,195)	$ 1,173,554