Consolidated Statement Changes in Stockholders' Equity (USD $) In Thousands		Total		Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)
Beginning balance at Dec. 31, 2009		$ 65,799		$ 463	$ 66,925	$ (1,589)
Beginning balance, shares at Dec. 31, 2009				46,323
Exercise of warrants		10,741		12	10,729
Exercise of warrants, shares				1,176
Stock-based compensation		634			634
Net income		32,272				32,272
Ending balance at Dec. 31, 2010		109,446	[1]	475	78,288	30,683
Ending balance, shares at Dec. 31, 2010				47,499
Issuance of common stock*	[1]	112,286		43	112,243
Issuance of common stock*, shares	[1]			4,300
Exercise of stock options*	[1]	125		1	124
Exercise of stock options*, shares	[1]			88
Excess tax benefit from stock-based award activity*	[1]	512			512
Stock-based compensation	[1]	7,346			7,346
Net income	[1]	108,597				108,597
Ending balance at Sep. 30, 2011	[1]	$ 338,312		$ 519	$ 198,513	$ 139,280
Ending balance, shares at Sep. 30, 2011	[1]			51,887

[1] Unaudited