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Debt - Fair Value of Senior Secured Notes Based on Quoted Market Prices (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Carrying amount, net $ 209,583 $ 209,548
Senior Secured Term Loan [Member]
   
Debt Instrument [Line Items]    
Carrying amount, net 210,000 210,000
Fair value $ 224,175 $ 226,800