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Consolidated Balance Sheets (Parenthetical) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Mar. 30, 2014
Statement of Partners' Capital [Abstract]        
Common stock, par value (in dollars per share) $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare  
Common stock, shares authorized 750,000,000us-gaap_CommonStockSharesAuthorized 750,000,000us-gaap_CommonStockSharesAuthorized    
Common stock, shares issued 64,478,085us-gaap_CommonStockSharesIssued 63,182,806us-gaap_CommonStockSharesIssued 48,855,255us-gaap_CommonStockSharesIssued 244,276,923us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 64,478,085us-gaap_CommonStockSharesOutstanding 63,182,806us-gaap_CommonStockSharesOutstanding 48,855,255us-gaap_CommonStockSharesOutstanding 244,276,923us-gaap_CommonStockSharesOutstanding