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Restructuring Charge - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2015
Restructuring Cost and Reserve [Line Items]    
Restructuring charge $ 4,100us-gaap_RestructuringCharges $ 4,052us-gaap_RestructuringCharges