Equity (Common Stock) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended			1 Months Ended
	Jun. 30, 2012	Mar. 31, 2011 [UnderwrittenPublicOfferingMember]	Apr. 30, 2011 [UnderwrittenPublicOfferingMember] [SixPercentSeniorNotesMember]	Aug. 31, 2010 [RegisteredDirectOfferingCyanMember]	Feb. 28, 2010 [PrivatePlacementMember]
Sale Of Stock [Line Items]
Underwritten Public Offering	In June 2012, we completed an underwritten public offering of 8.6 million shares of common stock at a price of $7.50 per common share ($7.13 per common share, net of underwriting discounts) for net proceeds of $61.3 million.	In March 2011, we completed an underwritten public offering of 11.5 million shares of common stock at a price of $11.00 per common share ($10.34 per common share, net of underwriting discounts) for net proceeds of $118.4 million. In April 2011, we used a portion of the offering proceeds to redeem all $81.25 million of our outstanding 6% senior notes.		In August 2010, in connection with the issuance of the Senior Term Loan, we completed a registered direct offering to Cyan of 1.3 million shares of our common stock for aggregate net cash consideration of approximately $10.1 million, after deducting expenses. The purchase price per share was $7.91, the closing price of our common stock on the NYSE Amex on August 13, 2010. The net proceeds from this offering were used for general corporate purposes.	In February 2010, we completed a private placement of 3.4 million shares of our common stock to certain existing stockholders, certain directors and other third-party investors, for aggregate net cash consideration of approximately $20.5 million. The purchase price per share was $6.30, the closing price of our common stock on February 3, 2010. The net proceeds from this private placement were used to partially fund our 2010 capital budget.
Number Of Shares Offerred	8.6	11.5		1.3	3.4
Stock Price	$ 7.50	$ 11.00		$ 7.91	$ 6.30
Stock Price, Net Of Underwriting Discount	$ 7.13	$ 10.34
Senior Notes			$ 81.25
Net Proceeds	$ 61.3	$ 118.4		$ 10.1	$ 20.5