Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Retained Earnings	Accumulated Other Non-Owner Changes to Equity
Balance (in shares) at Dec. 31, 2020		64,171		13,530
Balance at Dec. 31, 2020	$ 1,382,677	$ 642	$ 501,531	$ (516,992)	$ 1,519,811	$ (122,315)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	70,350				99,873	(29,523)
Dividends declared	(32,402)				(32,402)
Residual interest in subsidiary	2,177		2,177
Common stock repurchases (in shares)				100
Common stock repurchases	(5,229)			$ (5,229)
Employee stock plans (in shares)		173		28
Employee stock plans	11,193	$ 1	12,854	$ (1,421)	(241)
Balance (in shares) at Dec. 31, 2021		64,344		13,658
Balance at Dec. 31, 2021	1,428,766	$ 643	516,562	$ (523,642)	1,587,041	(151,838)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	(55,183)				13,479	(68,662)
Dividends declared	(32,376)				(32,376)
Common stock repurchases (in shares)				200
Common stock repurchases	(6,721)			$ (6,721)
Employee stock plans (in shares)		137		33
Employee stock plans	11,841	$ 2	13,229	$ (1,144)	(246)
Balance (in shares) at Dec. 31, 2022		64,481		13,891
Balance at Dec. 31, 2022	1,346,327	$ 645	529,791	$ (531,507)	1,567,898	(220,500)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	41,367				15,996	25,371
Dividends declared	(32,412)				(32,412)
Residual interest in subsidiary	(2,381)		(2,381)
Common stock repurchases (in shares)				0
Common stock repurchases				$ 0
Employee stock plans (in shares)		119		23
Employee stock plans	9,362	$ 1	10,538	$ (908)	(269)
Balance (in shares) at Dec. 31, 2023		64,600		13,914
Balance at Dec. 31, 2023	$ 1,362,263	$ 646	$ 537,948	$ (532,415)	$ 1,551,213	$ (195,129)