Annual report pursuant to Section 13 and 15(d)

Income Tax - Reconciliation of Unrecognized Tax Benefits of Uncertain Tax Positions (Detail)

v2.4.1.9
Income Tax - Reconciliation of Unrecognized Tax Benefits of Uncertain Tax Positions (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]    
Unrecognized tax benefits, Beginning Balance $ 2,007us-gaap_UnrecognizedTaxBenefits $ 1,967us-gaap_UnrecognizedTaxBenefits
Additions based on tax positions related to the current year 32us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 32us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Additions based on tax positions related to prior years   8us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Unrecognized tax benefits, Ending Balance $ 2,039us-gaap_UnrecognizedTaxBenefits $ 2,007us-gaap_UnrecognizedTaxBenefits