Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Convertible Notes, discount	$ 36,598	$ 50,336
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000us-gaap_PreferredStockSharesAuthorized	1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	170,000,000us-gaap_CommonStockSharesAuthorized	170,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	78,117,227us-gaap_CommonStockSharesIssued	75,803,020us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	78,117,227us-gaap_CommonStockSharesOutstanding	75,803,020us-gaap_CommonStockSharesOutstanding

Face amount or stated value per share of common stock.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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