Common Stock Common Stock (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended				12 Months Ended
	Aug. 29, 2011	Feb. 12, 2010	Jan. 14, 2010	Dec. 18, 2009	Dec. 31, 2010
Stockholders' Equity Note [Abstract]
Common stock, shares issued				4,000,000
Public offering price (in dollars per share)				$ 9.25
Issuance of common shares for inducement on preferred stock conversion (in shares)				750,000
Issuance of common stock to underwriters under overallotment option (in shares)			207,200
Issuance of common stock to underwriters under overallotment option			$ 1,800		$ 1,806
Issuance of common stock for PGS Onshore Acquisition (in shares)		2,153,616
Issuance of common stock to the Lenders (in shares)	1,041,668