CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) $ in Thousands		Total		Common Stock	Additional Paid-in- Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2021				55,609,226
Beginning balance at Dec. 31, 2021		$ 265,882		$ 951	$ 259,317	$ (4,574)	$ (1,265,032)	$ 1,275,220
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		67,391						67,391
Other comprehensive income (loss), net of tax		(134)				(134)
Share-based payment activity (in shares)	[1]			262,008
Share-based payment activity	[1]	9,558			6,068		3,486	4
Dividends declared		(13,250)						(13,250)
Treasury purchases (in shares)				(100,912)
Treasury purchases		(14,802)					(14,802)
Ending balance (in shares) at Mar. 31, 2022				55,770,322
Ending balance at Mar. 31, 2022		314,645		$ 951	265,385	(4,708)	(1,276,348)	1,329,365
Beginning balance (in shares) at Dec. 31, 2021				55,609,226
Beginning balance at Dec. 31, 2021		265,882		$ 951	259,317	(4,574)	(1,265,032)	1,275,220
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		173,559
Other comprehensive income (loss), net of tax		(237)
Ending balance (in shares) at Jun. 30, 2022				55,780,322
Ending balance at Jun. 30, 2022		416,725		$ 951	274,384	(4,811)	(1,276,090)	1,422,291
Beginning balance (in shares) at Mar. 31, 2022				55,770,322
Beginning balance at Mar. 31, 2022		314,645		$ 951	265,385	(4,708)	(1,276,348)	1,329,365
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		106,168						106,168
Other comprehensive income (loss), net of tax		(103)				(103)
Share-based payment activity (in shares)	[1]			12,422
Share-based payment activity	[1]	9,595			8,999		596	0
Dividends declared		(13,242)						(13,242)
Treasury purchases (in shares)				(2,422)
Treasury purchases		(338)					(338)
Ending balance (in shares) at Jun. 30, 2022				55,780,322
Ending balance at Jun. 30, 2022		$ 416,725		$ 951	274,384	(4,811)	(1,276,090)	1,422,291
Beginning balance (in shares) at Dec. 31, 2022		52,200,903		52,200,903
Beginning balance at Dec. 31, 2022		$ 154,660		$ 951	298,053	(5,211)	(1,694,857)	1,555,724
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		52,820						52,820
Other comprehensive income (loss), net of tax		394				394
Share-based payment activity (in shares)	[1]			315,049
Share-based payment activity	[1]	15,396			1,899		13,497
Dividends declared		(14,709)	[1]					(14,709)
Treasury purchases (in shares)	[2]			(1,341,520)
Treasury purchases	[2]	(161,553)					(161,553)
Ending balance (in shares) at Mar. 31, 2023				51,174,432
Ending balance at Mar. 31, 2023		$ 47,008		$ 951	299,952	(4,817)	(1,842,913)	1,593,835
Beginning balance (in shares) at Dec. 31, 2022		52,200,903		52,200,903
Beginning balance at Dec. 31, 2022		$ 154,660		$ 951	298,053	(5,211)	(1,694,857)	1,555,724
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		137,530
Other comprehensive income (loss), net of tax		$ 689
Ending balance (in shares) at Jun. 30, 2023		50,565,881		50,565,881
Ending balance at Jun. 30, 2023		$ 54,691		$ 951	311,288	(4,522)	(1,917,031)	1,664,005
Beginning balance (in shares) at Mar. 31, 2023				51,174,432
Beginning balance at Mar. 31, 2023		47,008		$ 951	299,952	(4,817)	(1,842,913)	1,593,835
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		84,710						84,710
Other comprehensive income (loss), net of tax		295				295
Share-based payment activity (in shares)	[1]			10,508
Share-based payment activity	[1]	11,915			11,336		579
Dividends declared		(14,540)						(14,540)
Treasury purchases (in shares)	[2]			(619,059)
Treasury purchases	[2]	$ (74,697)					(74,697)
Ending balance (in shares) at Jun. 30, 2023		50,565,881		50,565,881
Ending balance at Jun. 30, 2023		$ 54,691		$ 951	$ 311,288	$ (4,522)	$ (1,917,031)	$ 1,664,005

[1] During certain periods presented, accumulated dividends were paid to certain shareholders upon vesting of performance vested restricted stock units ("PVRSU") which are captured in Share-based payment activity.

[2] Beginning January 1, 2023, Treasury purchases include excise tax as imposed by the Inflation Reduction Act of 2022.