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Derivative Liabilities Recognized in Current Installments of Other Liabilities in Condensed Consolidated Balance Sheets (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Derivatives, Fair Value [Line Items]  
Gross Amounts of Recognized Liabilities $ (283)
Gross Amounts Offset in the Statement of Financial Position   
Net Amounts of Liabilities Presented in the Statement of Financial Position (283)
Financial Instruments   
Cash Collateral Pledged   
Net Amount (283)
Bank of the West
 
Derivatives, Fair Value [Line Items]  
Gross Amounts of Recognized Liabilities (283)
Gross Amounts Offset in the Statement of Financial Position   
Net Amounts of Liabilities Presented in the Statement of Financial Position (283)
Financial Instruments   
Cash Collateral Pledged   
Net Amount $ (283)