Consolidated Statement of Shareholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]
Balances at Dec. 31, 2020	$ 584,250	$ 430	$ 749,050	$ (159,610)	$ (5,620)
Net income	13,060			13,060
Other comprehensive income (loss)	630				630
Purchase of common stock	(2,640)	0	(2,640)
Shares surrendered upon exercise and vesting of equity awards to cover taxes	(1,770)		(1,770)
Non-cash compensation expense	2,440		2,440
Balances at Mar. 31, 2021	595,970	430	747,080	(146,550)	(4,990)
Balances at Dec. 31, 2020	584,250	430	749,050	(159,610)	(5,620)
Net income	24,900
Other comprehensive income (loss)	1,620				1,620
Shares surrendered upon exercise and vesting of equity awards to cover taxes	(4,620)
Dividends declared	0
Balances at Jun. 30, 2021	597,600	430	735,880	(134,710)	(4,000)
Balances at Mar. 31, 2021	595,970	430	747,080	(146,550)	(4,990)
Net income	11,840			11,840
Other comprehensive income (loss)	990				990
Purchase of common stock	(11,570)	0	(11,570)
Shares surrendered upon exercise and vesting of equity awards to cover taxes	(2,850)		(2,850)
Non-cash compensation expense	3,220	0	3,220
Dividends declared	0
Balances at Jun. 30, 2021	597,600	430	735,880	(134,710)	(4,000)
Balances at Dec. 31, 2021	630,850	430	732,490	(102,300)	230
Net income	14,170			14,170
Other comprehensive income (loss)	(2,240)				(2,240)
Purchase of common stock	(9,060)	0	(9,060)
Shares surrendered upon exercise and vesting of equity awards to cover taxes	(970)		(970)
Non-cash compensation expense	2,820		2,820
Dividends declared	(1,740)		(1,740)
Balances at Mar. 31, 2022	633,830	430	723,540	(88,130)	(2,010)
Balances at Dec. 31, 2021	630,850	430	732,490	(102,300)	230
Net income	34,030
Other comprehensive income (loss)	(5,770)				(5,770)
Shares surrendered upon exercise and vesting of equity awards to cover taxes	(2,280)
Dividends declared	(3,500)
Balances at Jun. 30, 2022	630,780	420	704,170	(68,270)	(5,540)
Balances at Mar. 31, 2022	633,830	430	723,540	(88,130)	(2,010)
Net income	19,860			19,860
Other comprehensive income (loss)	(3,530)				(3,530)
Purchase of common stock	(18,830)	(10)	(18,820)
Shares surrendered upon exercise and vesting of equity awards to cover taxes	(1,310)		(1,310)
Non-cash compensation expense	2,480	0	2,480
Dividends declared	(1,720)		(1,720)
Balances at Jun. 30, 2022	$ 630,780	$ 420	$ 704,170	$ (68,270)	$ (5,540)