Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)
Beginning Balance (shares) at Dec. 31, 2018			58,546,480
Beginning Balance at Dec. 31, 2018	$ 2,043,913		$ 296,483	$ (24,245)	$ 1,288,911	$ 500,660		$ (17,896)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	167,596					167,596
Other comprehensive income (loss)	18,660							18,660
Comprehensive income	186,256
Repurchase of shares in connection with stock repurchase program (in shares)			(1,820,202)
Repurchase of shares in connection with stock repurchase program	(62,944)			(62,944)
Cash dividends	(50,901)					(50,901)
Issuance of common stock for stock-based compensation awards (in shares)			128,724
Issuance of common stock for stock-based compensation awards	(831)			4,000	(4,831)
Stock-based compensation expense	10,196				10,196
Ending Balance (shares) at Dec. 31, 2019			56,855,002
Ending Balance at Dec. 31, 2019	2,125,689	$ (35,099)	$ 296,483	(83,189)	1,294,276	617,355	$ (35,099)	764
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	83,651					83,651
Other comprehensive income (loss)	24,304							24,304
Comprehensive income	107,955
Repurchase of shares in connection with stock repurchase program (in shares)			(818,886)
Repurchase of shares in connection with stock repurchase program	(24,569)			(24,569)
Cash dividends	(50,134)					(50,134)
Issuance of common stock for stock-based compensation awards (in shares)			164,371
Issuance of common stock for stock-based compensation awards	(1,686)			6,204	(7,890)
Stock-based compensation expense	10,577				10,577
Ending Balance (shares) at Dec. 31, 2020			56,200,487
Ending Balance at Dec. 31, 2020	$ 2,132,733		$ 296,483	(101,554)	1,296,963	615,773		25,068
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13 [Member]
Net income	$ 175,892					175,892
Other comprehensive income (loss)	(35,511)							(35,511)
Comprehensive income	140,381
Repurchase of shares in connection with stock repurchase program (in shares)			(612,107)
Repurchase of shares in connection with stock repurchase program	(21,315)			(21,315)
Cash dividends	(50,017)					(50,017)
Issuance of common stock for stock-based compensation awards (in shares)			167,853
Issuance of common stock for stock-based compensation awards	(2,003)			4,842	(6,845)
Stock-based compensation expense	10,074				10,074
Ending Balance (shares) at Dec. 31, 2021			55,756,233
Ending Balance at Dec. 31, 2021	$ 2,209,853		$ 296,483	$ (118,027)	$ 1,300,192	$ 741,648		$ (10,443)