CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings Cumulative-effect adjustment of a change in accounting principle, net of tax: ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Cumulative-effect adjustment of a change in accounting principle, net of tax: ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments	Total
Balance at Dec. 31, 2019	$ 1,399	$ 2,503,677		$ 437,072	$ (31,749)	$ (270,141)		$ 2,640,258
Balance (in shares) at Dec. 31, 2019	129,928,479
Increase (Decrease) in Stockholders' Equity
Net income				185,754				185,754
Cash dividends declared				(135,099)				(135,099)
Common stock issued under Employee Stock Purchase Plan		312						312
Common stock issued under Employee Stock Purchase Plan (in shares)	19,069
Equity-based awards	$ 3	10,025		(1,236)		(1,749)		7,043
Equity-based awards (in shares)	182,483
Common stock repurchased						(5,000)		(5,000)
Common stock repurchased (in shares)	(217,759)
Other comprehensive (loss) income, net of tax					63,353			63,353
Balance at Dec. 31, 2020	$ 1,402	2,514,014	$ (12,517)	473,974	31,604	(276,890)	$ (12,517)	2,744,104
Balance (in shares) at Dec. 31, 2020	129,912,272
Increase (Decrease) in Stockholders' Equity
Net income				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) income, net of tax					(153,297)			(153,297)
Balance at Dec. 31, 2021	$ 1,406	2,527,663		604,534	(121,693)	(354,998)		$ 2,656,912
Balance (in shares) at Dec. 31, 2021	127,502,472							127,502,472
Increase (Decrease) in Stockholders' Equity
Treasury Stock Balance								$ 354,998
Net income				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) income, net of tax					(517,561)			(517,561)
Balance at Dec. 31, 2022	$ 1,410	$ 2,538,336		$ 736,544	$ (639,254)	$ (368,031)		$ 2,269,005
Balance (in shares) at Dec. 31, 2022	127,363,327							127,363,327
Increase (Decrease) in Stockholders' Equity
Treasury Stock Balance								$ 368,031