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Variable Interest Entity ("VIE") - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended 0 Months Ended
Sep. 30, 2014
Oct. 02, 2013
Apr. 26, 2013
Apr. 12, 2013
Mar. 18, 2013
Nov. 11, 2014
Subsequent event
SunTrust
Nov. 11, 2014
Subsequent event
SunTrust
Sep. 30, 2014
Financial Standby Letter of Credit
Variable Interest Entity [Line Items]                
Equity investment at risk $ 9.0 $ 3.5 $ 1.9   $ 3.1      
Capital contribution made by non controlling interest 0.5              
Maximum capital contributions amount by company 8.5              
Maximum capital contributions amount by minority interest 0.5              
Aggregate payments on credit facility           6.1    
Outstanding principal balance             1.8  
Capital contribution made by company 8.50 3.50 1.85   3.15      
Carrying value of investment 0              
Investment 8.7              
Cash collateral letter of credit issued       0.2        
Letter of credit expiration date Apr. 15, 2015              
Expected contingent loss               $ 0.2