Consolidated Statements Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]
Balance at beginning of period (in shares) at Dec. 31, 2019		125,756,543
Balance at beginning of period at Dec. 31, 2019	$ 2,036,011	$ 136	$ 1,428,066	$ 762,480	$ (163,820)	$ 9,149
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Financing Receivable, Current Expected Credit Loss, Cumulative Effect On Retained Earnings, Before Tax | ASU 2016-01				(26,729)
Financing Receivable, Current Expected Credit Loss, Cumulative Effect On Retained Earnings, Tax | ASU 2016-13				7,856
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		224,355
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture	0	$ 0	0
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	6,850		6,850
Cash dividends declared on common stock	(69,182)			(69,182)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	111,515			111,515
Other comprehensive income (loss)	$ 23,604					23,604
Repurchase of treasury stock (in shares)	2,716,034	2,716,034
Repurchase of treasury stock	$ (36,180)				(36,180)
Balance at end of period (in shares) at Dec. 31, 2020		123,264,864
Balance at end of period at Dec. 31, 2020	2,053,745	$ 136	1,434,916	785,940	(200,000)	32,753
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Convertible debt, cumulative effect on retained earnings before tax				10,715
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	(10,705)		(21,420)
AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt, tax	3,160		3,160
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		423,856
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture	0	$ 0	0
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	5,042		5,042
Cash dividends declared on common stock	(68,666)			(68,666)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	204,572			204,572
Other comprehensive income (loss)	$ (44,165)					(44,165)
Repurchase of treasury stock (in shares)	3,682,268	3,682,268
Repurchase of treasury stock	$ (50,000)				(50,000)
Balance at end of period (in shares) at Dec. 31, 2021		120,006,452
Balance at end of period at Dec. 31, 2021	2,092,983	$ 136	1,421,698	932,561	(250,000)	(11,412)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares pursuant to various stock plans, net of forfeitures and tax withholding cancellations (in shares)		527,743
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture	531	$ 1	530
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	8,775		8,775
Cash dividends declared on common stock	(67,126)			(67,126)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	218,277			218,277
Other comprehensive income (loss)	$ (219,445)					(219,445)
Repurchase of treasury stock (in shares)	1,038,986	1,038,986
Repurchase of treasury stock	$ (14,667)				(14,667)
Balance at end of period (in shares) at Dec. 31, 2022		119,495,209
Balance at end of period at Dec. 31, 2022	$ 2,019,328	$ 137	$ 1,431,003	$ 1,083,712	$ (264,667)	$ (230,857)