Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2020		64,851,126
Beginning balance at Dec. 31, 2020	$ 2,119,912	$ 649	$ 1,407,597	$ 711,666
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	110,690			110,690
Shares issued under stock-based compensation programs, net (in shares)		221,303
Shares issued under stock-based compensation programs, net	1,009	$ 2	1,007
Cash dividends declared	(25,978)			(25,978)
Stock dividends declared (in shares)		5,192,776
Stock dividends declared	(687)	$ 52	279,579	(280,318)
Stock-based compensation expense	9,926		9,926
Ending balance (in shares) at Mar. 31, 2021		70,265,205
Ending balance at Mar. 31, 2021	$ 2,214,872	$ 703	1,698,109	516,060
Beginning balance (in shares) at Dec. 31, 2021	70,668,093	70,668,093
Beginning balance at Dec. 31, 2021	$ 2,597,146	$ 707	1,709,276	887,163
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	148,421			148,421
Shares issued under stock-based compensation programs, net (in shares)		498,921
Shares issued under stock-based compensation programs, net	(12,628)	$ 5	(12,633)
Cash dividends declared	(35,583)			(35,583)
Stock-based compensation expense	$ 13,726		13,726
Ending balance (in shares) at Mar. 31, 2022	71,162,245	71,162,245
Ending balance at Mar. 31, 2022	$ 2,711,082	$ 712	$ 1,710,369	$ 1,000,001
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited		(4,769)