Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.1.9
Line of Credit, Short-Term and Long-Term Borrowings - Additional Information (Detail) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Debt Disclosure [Abstract]    
Outstanding letters of credit $ 3,900,000us-gaap_LettersOfCreditOutstandingAmount $ 3,400,000us-gaap_LettersOfCreditOutstandingAmount
Short-term borrowings $ 87,000us-gaap_ShortTermBorrowings $ 1,810,000us-gaap_ShortTermBorrowings