Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Common Stock	Preferred Stock	Paid-In Capital	Other Comprehensive Income (Loss)	Accumulated Deficit
Balance at Dec. 31, 2008	$ 237,487	$ 49	$ 1	$ 216,253	$ 25,560	$ (4,376)
Options exercised	65			65
Retirement of shares upon vesting of restricted stock	(431)			(431)
Issuance of common stock	37,778	12		37,766
Share-based compensation expense	6,328			6,328
Derivative fair value adjustment, net of tax	(23,792)				(23,792)
Preferred stock dividend	(5,140)					(5,140)
Net income (loss)	(90,190)					(90,190)
Balance at Dec. 31, 2009	162,105	61	1	259,981	1,768	(99,706)
Options exercised	297	1		296
Retirement of shares upon vesting of restricted stock	(507)			(507)
Share-based compensation expense	7,137			7,137
Derivative fair value adjustment, net of tax	(2,857)				(2,857)
Preferred stock dividend	(5,139)					(5,139)
Net income (loss)	47,126					47,126
Balance at Dec. 31, 2010	208,162	62	1	266,907	(1,089)	(57,719)
Options exercised	234			234
Retirement of shares upon vesting of restricted stock	(1,368)			(1,368)
Share-based compensation expense	4,833			4,833
Derivative fair value adjustment, net of tax	5,120				5,120
Preferred stock dividend	(5,139)					(5,139)
Net income (loss)	10,548					10,548
Balance at Dec. 31, 2011	$ 222,390	$ 62	$ 1	$ 270,606	$ 4,031	$ (52,310)