UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		72,997
Beginning of period at Dec. 31, 2021	$ 188,406	$ 730	$ 488,036	$ 621	$ 442,596	$ (743,577)
Beginning of period (in shares) at Dec. 31, 2021						51,492
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19,181				19,181
Issuance for stock-based compensation and dividends, net of forfeitures (in shares)		(1)
Issuance for stock-based compensation and dividends, net of forfeitures	1		319		(318)
Stock-based compensation expense	4,437		4,437
Employee stock purchase plan (in shares)						(3)
Employee stock purchase plan	242		193			$ 49
Dividends	(6,094)				(6,094)
Change in fair value of interest rate swaps	2,302			2,302
Repurchases of common stock (in shares)						147
Repurchases of common stock	(10,270)					$ (10,270)
Ending balance (in shares) at Mar. 31, 2022		72,996
End of period at Mar. 31, 2022	$ 198,205	$ 730	492,985	2,923	455,365	$ (753,798)
End of period (in shares) at Mar. 31, 2022						51,636
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0.30
Beginning of period at Dec. 31, 2021	$ 188,406	$ 730	488,036	621	442,596	$ (743,577)
Beginning of period (in shares) at Dec. 31, 2021						51,492
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	68,359
Employee stock purchase plan	831
Change in fair value of interest rate swaps	(615)
Ending balance (in shares) at Sep. 30, 2022		73,006
End of period at Sep. 30, 2022	208,976	$ 730	502,909	6	491,856	$ (786,525)
End of period (in shares) at Sep. 30, 2022						52,172
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		72,996
Beginning of period at Mar. 31, 2022	198,205	$ 730	492,985	2,923	455,365	$ (753,798)
Beginning of period (in shares) at Mar. 31, 2022						51,636
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	26,916				26,916
Issuance for stock-based compensation and dividends, net of forfeitures (in shares)		(11)
Issuance for stock-based compensation and dividends, net of forfeitures	0		298		(298)
Stock-based compensation expense	4,410		4,410
Employee stock purchase plan (in shares)						(4)
Employee stock purchase plan	295		234			$ 61
Dividends	(6,093)				(6,093)
Change in fair value of interest rate swaps	(2,917)			(2,917)
Repurchases of common stock (in shares)						162
Repurchases of common stock	(10,283)					$ (10,283)
Ending balance (in shares) at Jun. 30, 2022		73,007
End of period at Jun. 30, 2022	$ 210,533	$ 730	497,927	6	475,890	$ (764,020)
End of period (in shares) at Jun. 30, 2022						51,794
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0.30
Beginning balance (in shares)		73,007
Net income	$ 22,262				22,262
Issuance for stock-based compensation and dividends, net of forfeitures (in shares)		(1)
Issuance for stock-based compensation and dividends, net of forfeitures	(1)		318		(319)
Stock-based compensation expense	4,445		4,445
Employee stock purchase plan (in shares)						(5)
Employee stock purchase plan	294		219			$ 75
Dividends	(5,977)				(5,977)
Change in fair value of interest rate swaps	0
Repurchases of common stock (in shares)						383
Repurchases of common stock	(22,580)					$ (22,580)
Ending balance (in shares) at Sep. 30, 2022		73,006
End of period at Sep. 30, 2022	$ 208,976	$ 730	502,909	6	491,856	$ (786,525)
End of period (in shares) at Sep. 30, 2022						52,172
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0.30
Beginning balance (in shares)		73,006
Beginning balance (in shares)		73,242
Beginning of period at Dec. 31, 2022	$ 182,198	$ 732	507,734	6	492,764	$ (819,038)
Beginning of period (in shares) at Dec. 31, 2022	52,744					52,744
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 16,210				16,210
Issuance for stock-based compensation and dividends, net of forfeitures (in shares)		(5)
Issuance for stock-based compensation and dividends, net of forfeitures	(1)		340		(341)
Stock-based compensation expense	4,326		4,326
Employee stock purchase plan (in shares)						(5)
Employee stock purchase plan	245		172			$ 73
Dividends	(7,003)				(7,003)
Repurchases of common stock (in shares)						181
Repurchases of common stock	(10,244)					$ (10,244)
Other	(6)			(6)
Ending balance (in shares) at Mar. 31, 2023		73,247
End of period at Mar. 31, 2023	$ 185,725	$ 732	512,572	0	501,630	$ (829,209)
End of period (in shares) at Mar. 31, 2023						52,920
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0.36
Beginning of period at Dec. 31, 2022	$ 182,198	$ 732	507,734	6	492,764	$ (819,038)
Beginning of period (in shares) at Dec. 31, 2022	52,744					52,744
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 45,359
Employee stock purchase plan	817
Change in fair value of interest rate swaps	0
Ending balance (in shares) at Sep. 30, 2023		73,224
End of period at Sep. 30, 2023	$ 178,952	$ 732	523,669	0	516,540	$ (861,989)
End of period (in shares) at Sep. 30, 2023	53,464					53,464
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		73,247
Beginning of period at Mar. 31, 2023	$ 185,725	$ 732	512,572	0	501,630	$ (829,209)
Beginning of period (in shares) at Mar. 31, 2023						52,920
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,574				18,574
Issuance for stock-based compensation and dividends, net of forfeitures (in shares)		(32)
Issuance for stock-based compensation and dividends, net of forfeitures	0		322		(322)
Stock-based compensation expense	4,309		4,309
Employee stock purchase plan (in shares)						(5)
Employee stock purchase plan	296		219			$ 77
Dividends	(6,945)				(6,945)
Repurchases of common stock (in shares)						248
Repurchases of common stock	(14,341)					$ (14,341)
Ending balance (in shares) at Jun. 30, 2023		73,279
End of period at Jun. 30, 2023	$ 187,618	$ 732	517,422	0	512,937	$ (843,473)
End of period (in shares) at Jun. 30, 2023						53,163
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0.36
Beginning balance (in shares)		73,279
Net income	$ 10,575				10,575
Issuance for stock-based compensation and dividends, net of forfeitures (in shares)		(55)
Issuance for stock-based compensation and dividends, net of forfeitures	0		78		(78)
Stock-based compensation expense	5,967		5,967
Employee stock purchase plan (in shares)						(4)
Employee stock purchase plan	276		202			$ 74
Dividends	(6,894)				(6,894)
Change in fair value of interest rate swaps	0
Repurchases of common stock (in shares)						305
Repurchases of common stock	(18,590)					$ (18,590)
Ending balance (in shares) at Sep. 30, 2023		73,224
End of period at Sep. 30, 2023	$ 178,952	$ 732	$ 523,669	$ 0	$ 516,540	$ (861,989)
End of period (in shares) at Sep. 30, 2023	53,464					53,464
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share (in dollars per share)	$ 0.36
Beginning balance (in shares)		73,224