CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Retained Earnings	Accumulated Other Comprehensive Loss
Balance at beginning of period (in shares) at Dec. 31, 2020		94,483,136
Balance at beginning of period at Dec. 31, 2020	$ 2,746,649	$ 931	$ 2,354,871	$ 330,555	$ 60,292
Increase (Decrease) in Stockholders' Equity
Net income	255,058			255,058
Other comprehensive loss	(59,116)				(59,116)
Repurchase and retirement of common stock (in shares)		(479,944)
Repurchase and retirement of common stock	(18,067)	$ (5)	(11,942)	(6,120)
Cash dividends declared	(90,747)			(90,747)
Dividend equivalents declared	0		361	(361)
Share-based compensation expense	9,911		9,911
Issuance of restricted stock, net (in shares)		450,549
Issuance of restricted stock, net	0	$ 3	(3)
Restricted stock surrendered and canceled (in shares)		(149,782)
Restricted stock surrendered and canceled	(6,354)		(6,354)
Exercise of stock options (in shares)		50,252
Exercise of stock options	782		782
Balance at end of period (in shares) at Sep. 30, 2021		94,354,211
Balance at end of period at Sep. 30, 2021	2,838,116	$ 929	2,347,626	488,385	1,176
Balance at beginning of period (in shares) at Jun. 30, 2021		94,656,575
Balance at beginning of period at Jun. 30, 2021	2,813,419	$ 931	2,352,112	433,852	26,524
Increase (Decrease) in Stockholders' Equity
Net income	90,088			90,088
Other comprehensive loss	(25,348)				(25,348)
Repurchase and retirement of common stock (in shares)		(280,270)
Repurchase and retirement of common stock	(11,170)	$ (3)	(6,965)	(4,202)
Cash dividends declared	(31,226)			(31,226)
Dividend equivalents declared	0		127	(127)
Share-based compensation expense	3,349		3,349
Issuance of restricted stock, net (in shares)		14,592
Issuance of restricted stock, net	0	$ 1	(1)
Restricted stock surrendered and canceled (in shares)		(39,755)
Restricted stock surrendered and canceled	(1,046)		(1,046)
Exercise of stock options (in shares)		3,069
Exercise of stock options	50		50
Balance at end of period (in shares) at Sep. 30, 2021		94,354,211
Balance at end of period at Sep. 30, 2021	$ 2,838,116	$ 929	2,347,626	488,385	1,176
Balance at beginning of period (in shares) at Dec. 31, 2021	94,389,543	94,389,543
Balance at beginning of period at Dec. 31, 2021	$ 2,886,311	$ 929	2,351,294	541,950	(7,862)
Increase (Decrease) in Stockholders' Equity
Net income	210,070			210,070
Other comprehensive loss	(273,251)				(273,251)
Cash dividends declared	(93,806)			(93,806)
Dividend equivalents declared	0		369	(369)
Share-based compensation expense	14,171		14,171
Issuance of restricted stock, net (in shares)		818,229
Issuance of restricted stock, net	0	$ 4	(4)
Restricted stock surrendered and canceled (in shares)		(234,851)
Restricted stock surrendered and canceled	(8,858)		(8,858)
Exercise of stock options (in shares)		43,846
Exercise of stock options	$ 759		759
Balance at end of period (in shares) at Sep. 30, 2022	95,016,767	95,016,767
Balance at end of period at Sep. 30, 2022	$ 2,735,396	$ 933	2,357,731	657,845	(281,113)
Balance at beginning of period (in shares) at Jun. 30, 2022		94,976,605
Balance at beginning of period at Jun. 30, 2022	2,755,219	$ 933	2,353,361	615,943	(215,018)
Increase (Decrease) in Stockholders' Equity
Net income	73,363			73,363
Other comprehensive loss	(66,095)				(66,095)
Cash dividends declared	(31,337)			(31,337)
Dividend equivalents declared	0		124	(124)
Share-based compensation expense	4,336		4,336
Issuance of restricted stock, net (in shares)		56,452
Issuance of restricted stock, net	0		0
Restricted stock surrendered and canceled (in shares)		(22,348)
Restricted stock surrendered and canceled	(184)		(184)
Exercise of stock options (in shares)		6,058
Exercise of stock options	$ 94		94
Balance at end of period (in shares) at Sep. 30, 2022	95,016,767	95,016,767
Balance at end of period at Sep. 30, 2022	$ 2,735,396	$ 933	$ 2,357,731	$ 657,845	$ (281,113)