Consolidated Statement of Changes in Shareholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common stock	Additional Paid-in Capital	(Accumulated deficit) retained earnings	Accumulated other comprehensive loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares outstanding		195,720,894
Stockholders' Equity (Deficit)	$ (191,085)	$ 1,957	$ 55,826	$ (248,868)
Exercise of stock options		22,260
Stock Issued During Period, Value, Stock Options Exercised	37		37
Share-based Compensation	1,820
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	1,820
Net income	101,931			101,931
Other comprehensive loss	0
Common shares outstanding		195,743,154
Stockholders' Equity (Deficit)	(87,297)	$ 1,957	57,683	(146,937)
Exercise of stock options		396,010
Stock Issued During Period, Value, Stock Options Exercised	2,251	$ 5	2,246
Share-based Compensation	3,434
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	1,536
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		46,750
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	935		935
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		30,682
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	614		614
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	1,885		1,885
Net income	89,388			89,388
Other comprehensive loss	$ (31)				$ (31)
Common shares outstanding	196,216,596	196,216,596
Stockholders' Equity (Deficit)	$ 9,281	$ 1,962	64,899	(57,549)	(31)
Exercise of stock options	275,543	275,543
Stock Issued During Period, Value, Stock Options Exercised	$ 1,915	$ 3	1,912
Share-based Compensation	4,609
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		31,871
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	814		814
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	3,795		3,795
Net income	130,241			130,241
Other comprehensive loss	$ 292				292
Common shares outstanding	196,524,010	196,524,010
Stockholders' Equity (Deficit)	$ 146,338	$ 1,965	$ 71,420	$ 72,692	$ 261