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Proportionate share of income (loss) from PRLP 2011 Holdings, LLC minority interest (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Related Party Transaction [Line Items]        
Income Loss From Equity Method Investments     $ 31,930 $ 42,740
Prlp2011 Holdings Llc Joint Venture [Member]
       
Related Party Transaction [Line Items]        
Income Loss From Equity Method Investments $ (706) $ (9) $ (2,484) $ 2,721