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Variable Interest Entities - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Entity
Dec. 31, 2012
Variable Interest Entity, Not Primary Beneficiary [Member]
   
Variable Interest Entity [Line Items]    
Count of VIEs 3  
Variable Interest Entity, Non consolidated, Carrying amount, Assets $ 11,304  
Variable Interest Entity, Nonconsolidated, Carrying Amount, Liabilities 43,910  
Variable Interest Entity, Financial or Other Support, Amount 149  
Maximum Exposure to loss related to VIEs 3,698  
Investment in VIEs 17  
Variable Interest Entity, Not Primary Beneficiary [Member] | Current Maturities of Borrowings [Member]
   
Variable Interest Entity [Line Items]    
Variable Interest Entity, Nonconsolidated, Carrying Amount, Liabilities 27,277  
Variable Interest Entity, Primary Beneficiary [Member]
   
Variable Interest Entity [Line Items]    
Count of VIEs 23  
Liabilities related to VIE 10,478 11,585
Variable Interest Entity, Consolidated, Carrying Amount, Net Working Capital 189 (746)
Variable Interest Entity, Consolidated, Carrying Amount, Assets 29,900 33,212
Variable Interest Entity, Financial or Other Support, Amount $ 8,317 $ 4,985