CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive (Loss) Income
BALANCE, Shares at Dec. 31, 2020		33,141,879
Accumulated gain (loss) at beginning of period at Dec. 31, 2020	$ 319,200	$ 300	$ 199,800	$ 269,400		$ (8,700)
BALANCE, Treasury Stock, Shares at Dec. 31, 2020					(3,518,607)
BALANCE, Treasury Stock, Value at Dec. 31, 2020					$ (141,600)
Net income	118,800			118,800
Issuance of common stock awards to employees (in shares)		125,550
Issuance of common stock awards to employees	0	$ 0	0
Surrender of common stock awards by employees (in shares)					(46,651)
Surrender of common stock awards	(5,600)				$ (5,600)
Share-based compensation expense	11,100		11,100
Share-based compensation issued to directors (in shares)		4,230
Share-based compensation issued to directors	500		500
Dividends Declared ($2.22 per share)	(35,700)			(35,700)
Net change in cash flow hedges, net of tax	8,500					8,500
Accumulated gain (loss) at end of period at Dec. 31, 2021	416,800	$ 300	211,400	352,500		(200)
BALANCE, Shares at Dec. 31, 2021		33,271,659
BALANCE, Treasury Stock, Shares at Dec. 31, 2021					(3,565,258)
BALANCE, Treasury Stock, Value at Dec. 31, 2021					$ (147,200)
Net income	223,400			223,400
Issuance of common stock awards to employees (in shares)		112,389
Issuance of common stock awards to employees	0	$ 0	0
Surrender of common stock awards by employees (in shares)					(55,183)
Surrender of common stock awards	(4,500)				$ (4,500)
Share-based compensation expense	12,900		12,900
Share-based compensation issued to directors (in shares)		6,305
Share-based compensation issued to directors	500		500
Issuance of awards previously classified as liability awards (in shares)		39,204
Issuance of awards previously classified as liability awards	4,000		4,000
Dividends Declared ($2.22 per share)	$ (62,800)			(62,800)
Common stock repurchase (in shares)	(1,500,000)				(1,502,634)
Common stock repurchase	$ (137,600)				$ (137,600)
Net change in cash flow hedges, net of tax	40,800					40,800
Accumulated gain (loss) at end of period at Dec. 31, 2022	$ 493,500	$ 300	228,800	513,100		40,600
BALANCE, Shares at Dec. 31, 2022	33,429,557	33,429,557
BALANCE, Treasury Stock, Shares at Dec. 31, 2022	(5,123,075)				(5,123,075)
BALANCE, Treasury Stock, Value at Dec. 31, 2022	$ (289,300)				$ (289,300)
Net income	243,700			243,700
Issuance of common stock awards to employees (in shares)		151,606
Issuance of common stock awards to employees	0	$ 0	0
Surrender of common stock awards by employees (in shares)					(54,802)
Surrender of common stock awards	(6,600)				$ (6,600)
Share-based compensation expense	15,200		15,200
Share-based compensation issued to directors (in shares)		6,538
Share-based compensation issued to directors	700		700
Dividends Declared ($2.22 per share)	$ (63,000)			(63,000)
Common stock repurchase (in shares)	(42,500)				(42,486)
Common stock repurchase	$ (6,300)				$ (6,300)
Net change in cash flow hedges, net of tax	(6,900)					(6,900)
Accumulated gain (loss) at end of period at Dec. 31, 2023	$ 670,300	$ 300	$ 244,700	$ 693,800		$ 33,700
BALANCE, Shares at Dec. 31, 2023	33,587,701	33,587,701
BALANCE, Treasury Stock, Shares at Dec. 31, 2023	(5,220,363)				(5,220,363)
BALANCE, Treasury Stock, Value at Dec. 31, 2023	$ (302,200)				$ (302,200)