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Principal Payments on Long-Term Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
2015 $ 71us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextRollingTwelveMonths  
2016 55us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearTwo  
2017 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearThree  
2018 99,400us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearFour  
Total indebtedness $ 99,526us-gaap_LongTermDebt $ 51,745us-gaap_LongTermDebt