Quarterly report pursuant to Section 13 or 15(d)

Line of Credit, Short-Term and Long-Term Borrowings - Additional Information (Detail)

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Line of Credit, Short-Term and Long-Term Borrowings - Additional Information (Detail) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Debt Disclosure [Abstract]    
Outstanding letters of credit $ 4,000,000 $ 4,000,000
Short-term borrowings $ 184,000 $ 87,000