Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Retained earnings	Accumulated other comprehensive income (loss), net
Beginning balance, shares at Dec. 31, 2020		35,912,243,000
Beginning balance at Dec. 31, 2020	$ 820,439	$ 571,021	$ 224,400	$ 25,018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards forfeited, shares		120,120,000
Stock-based compensation expense	1,796	$ 1,796
Common stock repurchased, shares		(25,803,000)
Common stock repurchased	(757)	$ (757)
Net income	58,046		58,046
Other comprehensive income (loss), net of tax	(8,957)			(8,957)
Cash dividends declared on common stock	(14,583)		(14,583)
Ending balance, shares at Jun. 30, 2021		36,006,560,000
Ending balance at Jun. 30, 2021	855,984	$ 572,060	267,863	16,061
Beginning balance, shares at Mar. 31, 2021		35,981,317,000
Beginning balance at Mar. 31, 2021	827,151	$ 571,204	242,486	13,461
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards forfeited, shares		27,800,000
Stock-based compensation expense	926	$ 926
Common stock repurchased, shares		(2,557,000)
Common stock repurchased	(70)	$ (70)
Net income	32,702		32,702
Other comprehensive income (loss), net of tax	2,600			2,600
Cash dividends declared on common stock	(7,325)		(7,325)
Ending balance, shares at Jun. 30, 2021		36,006,560,000
Ending balance at Jun. 30, 2021	855,984	$ 572,060	267,863	16,061
Beginning balance, shares at Dec. 31, 2021		35,105,779,000
Beginning balance at Dec. 31, 2021	854,432	$ 551,798	293,238	9,396
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards forfeited, shares		124,420,000
Stock-based compensation expense	1,793	$ 1,793
Common stock repurchased, shares		(126,270,000)
Common stock repurchased	(3,174)	$ (3,174)
Net income	38,341		38,341
Other comprehensive income (loss), net of tax	(71,179)			(71,179)
Cash dividends declared on common stock	(14,847)		(14,847)
Ending balance, shares at Jun. 30, 2022		35,103,929,000
Ending balance at Jun. 30, 2022	805,366	$ 550,417	316,732	(61,783)
Beginning balance, shares at Mar. 31, 2022		35,102,372,000
Beginning balance at Mar. 31, 2022	821,449	$ 550,096	305,581	(34,228)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards forfeited, shares		22,737,000
Exercise of stock options, shares		(21,180,000)
Exercise of stock options	(522)	$ (522)
Stock-based compensation expense	843	$ 843
Net income	18,584		18,584
Other comprehensive income (loss), net of tax	(27,555)			(27,555)
Cash dividends declared on common stock	(7,433)		(7,433)
Ending balance, shares at Jun. 30, 2022		35,103,929,000
Ending balance at Jun. 30, 2022	$ 805,366	$ 550,417	$ 316,732	$ (61,783)