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Other Intangible Assets - Additional Information (Detail) (USD $)
Mar. 31, 2015
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2016 $ 449,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2017 437,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2018 437,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2019 437,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2020 437,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter $ 2,539,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive