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Fair Value of Financial Assets and Liabilities - Fair Value and Carrying Value of Long-Term Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Debt Disclosure [Abstract]    
Long-term debt and related current maturities, Fair Value $ 30,860us-gaap_LongTermDebtFairValue $ 31,876us-gaap_LongTermDebtFairValue
Long-term debt and related current maturities, Carrying Value $ 30,852us-gaap_LongTermDebt $ 31,865us-gaap_LongTermDebt