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Contingencies - Additional Information (Detail)
$ in Millions
 9 Months Ended
Sep. 30, 2015
USD ($)
Loss Contingencies [Line Items]  
Loss Contingency, Damages Sought, Value $ 270.0
Financial Guarantee One [Member]  
Loss Contingencies [Line Items]  
Long-term Debt, Gross 1.0
Line of Credit Facility, Current Borrowing Capacity $ 1.0
Debt Instrument, Term 2 years
Debt Instrument, Payment Terms payment calculations assume a 7 year amortization with a balloon payment due at the end of the term.
Line of Credit Facility, Description line of credit has a two year term expiring in September 2015.
Line of Credit Facility, Expiration Date Sep. 30, 2015
Financial Guarantee Two [Member]  
Loss Contingencies [Line Items]  
Long-term Debt, Gross $ 1.4
Debt Instrument, Term 2 years
Debt Instrument, Payment Terms payment calculations assume a 7 year amortization with a balloon payment due at the end of the term.