CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock
Shares at beginning of year (in shares) at Dec. 31, 2018			71,856						45,822
Accumulated derivative instrument gain, beginning of year at Dec. 31, 2018	$ 168,331	$ 0	$ 719	$ 447,337	$ 1,296		$ 237,308	$ (168)	$ (518,329)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	130,862						130,862
Issuance for stock-based compensation and dividend equivalents, net of forfeitures (in shares)			346
Issuance for stock-based compensation and dividend equivalents, net of forfeitures	0		$ 3	846			(849)
Stock-based compensation expense	$ 11,007			11,007
Employee stock purchase plan (in shares)	(17)								(17)
Employee stock purchase plan	$ 558			355					$ 203
Dividends	(16,608)						(16,608)
Defined benefit pension plans, net of tax	(2,183)				(2,183)
Change in fair value of interest rate swap, net of tax	(807)				(807)
Repurchases of common stock (in shares)									3,472
Repurchases of common stock	(123,897)								$ (123,897)
Shares at end of year (in shares) at Dec. 31, 2019			72,202						49,277
Accumulated derivative instrument gain (loss), end of year at Dec. 31, 2019	167,263	$ (214)	$ 722	459,545	(1,526)	$ 0	350,545	$ (214)	$ (642,023)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	56,039						56,039
Issuance for stock-based compensation and dividend equivalents, net of forfeitures (in shares)			398
Issuance for stock-based compensation and dividend equivalents, net of forfeitures	0		$ 4	934			(938)
Stock-based compensation expense	$ 11,595			11,595
Employee stock purchase plan (in shares)	(19)								(19)
Employee stock purchase plan	$ 549			304					$ 245
Dividends	(16,787)						(16,787)
Defined benefit pension plans, net of tax	(1,706)				(1,706)
Change in fair value of interest rate swap, net of tax	(1,191)				(1,191)
Repurchases of common stock (in shares)									1,169
Repurchases of common stock	(35,613)								$ (35,613)
Shares at end of year (in shares) at Dec. 31, 2020			72,600						50,427
Accumulated derivative instrument gain (loss), end of year at Dec. 31, 2020	179,935		$ 726	472,378	(4,423)		388,645		$ (677,391)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	75,177						75,177
Issuance for stock-based compensation and dividend equivalents, net of forfeitures (in shares)			397
Issuance for stock-based compensation and dividend equivalents, net of forfeitures	0		$ 4	1,102			(1,106)
Stock-based compensation expense	$ 13,999			13,999
Employee stock purchase plan (in shares)	(15)								(15)
Employee stock purchase plan	$ 762			557					$ 205
Dividends	(20,120)						(20,120)
Defined benefit pension plans, net of tax	3,103				3,103
Change in fair value of interest rate swap, net of tax	1,941				1,941
Repurchases of common stock (in shares)									1,080
Repurchases of common stock	(66,391)								$ (66,391)
Shares at end of year (in shares) at Dec. 31, 2021			72,997						51,492
Accumulated derivative instrument gain (loss), end of year at Dec. 31, 2021	$ 188,406		$ 730	$ 488,036	$ 621		$ 442,596		$ (743,577)