CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated other comprehensive loss	Treasury Stock	Total
Balance at Dec. 31, 2020	$ 1,402	$ 2,514,014	$ 473,974	$ 31,604		$ 2,744,104
Balance (in shares) at Dec. 31, 2020	129,912,272
Treasury Stock, Value, Beginning Balance at Dec. 31, 2020					$ (276,890)
Increase (Decrease) in Stockholders' Equity
Net Income (Loss)			265,735			265,735
Cash dividends declared			(134,133)			(134,133)
Common stock issued under Employee Stock Purchase Plan		547				547
Common stock issued under Employee Stock Purchase Plan (in shares)	21,070
Equity-based awards	$ 4	13,102	(1,042)		(3,108)	8,956
Equity-based awards (in shares)	248,662
Common stock repurchased					(75,000)	(75,000)
Common stock repurchased (in shares)	(2,679,532)
Other comprehensive loss, net of tax				(153,297)		(153,297)
Balance at Dec. 31, 2021	$ 1,406	2,527,663	604,534	(121,693)		2,656,912
Balance (in shares) at Dec. 31, 2021	127,502,472
Treasury Stock, Value, Ending Balance at Dec. 31, 2021					(354,998)
Increase (Decrease) in Stockholders' Equity
Net Income (Loss)			265,685			265,685
Cash dividends declared			(132,588)			(132,588)
Common stock issued under Employee Stock Purchase Plan		379				379
Common stock issued under Employee Stock Purchase Plan (in shares)	16,680
Equity-based awards	$ 4	10,294	(1,087)		(3,555)	5,656
Equity-based awards (in shares)	241,360
Common stock repurchased					(9,478)	(9,478)
Common stock repurchased (in shares)	(397,185)
Other comprehensive loss, net of tax				(517,561)		(517,561)
Balance at Dec. 31, 2022	$ 1,410	2,538,336	736,544	(639,254)		$ 2,269,005
Balance (in shares) at Dec. 31, 2022	127,363,327					127,363,327
Treasury Stock, Value, Ending Balance at Dec. 31, 2022					(368,031)	$ 368,031
Increase (Decrease) in Stockholders' Equity
Net Income (Loss)			234,983			234,983
Cash dividends declared			(132,646)			(132,646)
Common stock issued under Employee Stock Purchase Plan		308				308
Common stock issued under Employee Stock Purchase Plan (in shares)	16,226
Equity-based awards	$ 3	9,606	(1,022)		(3,215)	5,372
Equity-based awards (in shares)	239,208
Other comprehensive loss, net of tax				109,044		109,044
Balance at Dec. 31, 2023	$ 1,413	$ 2,548,250	$ 837,859	$ (530,210)		$ 2,486,066
Balance (in shares) at Dec. 31, 2023	127,618,761					127,618,761
Treasury Stock, Value, Ending Balance at Dec. 31, 2023					$ (371,246)	$ 371,246