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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 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Related Party Transaction [Line Items]        
Income Loss From Equity Method Investments     $ 24,355 $ 34,214
Prlp2011 Holdings Llc Joint Venture [Member]
       
Related Party Transaction [Line Items]        
Income Loss From Equity Method Investments $ (32) $ 733 $ (1,778) $ 2,730