Fair Value Measurements - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015
Monte Carlo Simulation Models
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration liability	$ 3,300
Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration liability	1,500
Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent consideration liability	$ 5,500