Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common stock	Additional Paid-In Capital	(Accumulated Deficit) Retained Earnings
Beginning balance (in shares) at Dec. 31, 2021		28,830
Beginning balance at Dec. 31, 2021	$ 319,541	$ 288	$ 477,829	$ (158,576)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock on options exercised and restricted stock units vested (in shares)		419
Issuance of stock on options exercised and restricted stock units vested	4	$ 4
Repurchases of common stock (in shares)		(269)
Repurchase of common stock	(15,196)	$ (2)		(15,194)
Share-based compensation	3,141		3,141
Tax benefit from share-based compensation	(10,298)		(10,298)
Net income	36,066			36,066
Ending balance (in shares) at Mar. 31, 2022		28,980
Ending balance at Mar. 31, 2022	333,258	$ 290	470,672	(137,704)
Beginning balance (in shares) at Dec. 31, 2021		28,830
Beginning balance at Dec. 31, 2021	$ 319,541	$ 288	477,829	(158,576)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common stock (in shares)	(784)
Repurchase of common stock	$ (37,670)
Net income	71,289
Ending balance (in shares) at Sep. 30, 2022		28,505
Ending balance at Sep. 30, 2022	352,202	$ 285	476,867	(124,950)
Beginning balance (in shares) at Mar. 31, 2022		28,980
Beginning balance at Mar. 31, 2022	333,258	$ 290	470,672	(137,704)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock on options exercised and restricted stock units vested (in shares)		36
Repurchases of common stock (in shares)		(515)
Repurchase of common stock	(22,474)	$ (5)		(22,469)
Share-based compensation	3,295		3,295
Tax benefit from share-based compensation	(271)		(271)
Net income	21,220			21,220
Ending balance (in shares) at Jun. 30, 2022		28,501
Ending balance at Jun. 30, 2022	$ 335,028	$ 285	473,696	(138,953)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock on options exercised and restricted stock units vested (in shares)		4
Repurchases of common stock (in shares)	0
Repurchase of common stock	$ 0
Share-based compensation	3,282		3,282
Tax benefit from share-based compensation	(111)		(111)
Net income	14,003			14,003
Ending balance (in shares) at Sep. 30, 2022		28,505
Ending balance at Sep. 30, 2022	$ 352,202	$ 285	476,867	(124,950)
Beginning balance (in shares) at Dec. 31, 2022	28,179	28,179
Beginning balance at Dec. 31, 2022	$ 352,920	$ 282	480,060	(127,422)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock on options exercised and restricted stock units vested (in shares)		658
Issuance of stock on options exercised and restricted stock units vested	6	$ 6
Share-based compensation	3,290		3,290
Tax benefit from share-based compensation	(15,373)		(15,373)
Net income	11,630			11,630
Ending balance (in shares) at Mar. 31, 2023		28,837
Ending balance at Mar. 31, 2023	$ 352,473	$ 288	467,977	(115,792)
Beginning balance (in shares) at Dec. 31, 2022	28,179	28,179
Beginning balance at Dec. 31, 2022	$ 352,920	$ 282	480,060	(127,422)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchases of common stock (in shares)	(252)
Repurchase of common stock	$ (9,134)
Net income	$ 265,128
Ending balance (in shares) at Sep. 30, 2023	28,616	28,616
Ending balance at Sep. 30, 2023	$ 545,584	$ 286	474,450	70,848
Beginning balance (in shares) at Mar. 31, 2023		28,837
Beginning balance at Mar. 31, 2023	352,473	$ 288	467,977	(115,792)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock on options exercised and restricted stock units vested (in shares)		20
Issuance of stock on options exercised and restricted stock units vested	1	$ 1
Share-based compensation	3,288		3,288
Net income	12,282			12,282
Ending balance (in shares) at Jun. 30, 2023		28,857
Ending balance at Jun. 30, 2023	368,044	$ 289	471,265	(103,510)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock on options exercised and restricted stock units vested (in shares)		11
Issuance of stock on options exercised and restricted stock units vested	$ 0
Repurchases of common stock (in shares)	(252)	(252)
Repurchase of common stock	$ (9,134)	$ (3)		(9,131)
Share-based compensation	3,434		3,434
Tax benefit from share-based compensation	(249)		(249)
Cash dividend paid	(57,727)			(57,727)
Net income	$ 241,216			241,216
Ending balance (in shares) at Sep. 30, 2023	28,616	28,616
Ending balance at Sep. 30, 2023	$ 545,584	$ 286	$ 474,450	$ 70,848