CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Retained Earnings	Accumulated Other Comprehensive Income (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	68,668			68,668
Other comprehensive loss	(75,481)				(75,481)
Repurchase and retirement of common stock (in shares)		(199,674)
Repurchase and retirement of common stock	(6,897)	$ (2)	(4,977)	(1,918)
Cash dividends declared	(28,287)			(28,287)
Dividend equivalents declared	0		107	(107)
Share-based compensation expense	3,105		3,105
Issuance of restricted stock, net (in shares)		419,757
Issuance of restricted stock, net	0	$ 2	(2)
Restricted stock surrendered and canceled (in shares)		(100,550)
Restricted stock surrendered and canceled	(5,279)		(5,279)
Exercise of stock options (in shares)		41,746
Exercise of stock options	620		620
Balance at end of period (in shares) at Mar. 31, 2021		94,644,415
Balance at end of period at Mar. 31, 2021	$ 2,703,098	$ 931	2,348,445	368,911	(15,189)
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	66,904			66,904
Other comprehensive loss	(136,371)				(136,371)
Cash dividends declared	(31,142)			(31,142)
Dividend equivalents declared	0		121	(121)
Share-based compensation expense	5,530		5,530
Issuance of restricted stock, net (in shares)		714,783
Issuance of restricted stock, net	0	$ 4	(4)
Restricted stock surrendered and canceled (in shares)		(175,219)
Restricted stock surrendered and canceled	(8,548)		(8,548)
Exercise of stock options (in shares)		16,742
Exercise of stock options	$ 334		334
Balance at end of period (in shares) at Mar. 31, 2022	94,945,849	94,945,849
Balance at end of period at Mar. 31, 2022	$ 2,783,018	$ 933	$ 2,348,727	$ 577,591	$ (144,233)