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Acquisitions - Additional Information (Detail) (USD $)
Mar. 31, 2014
Feb. 28, 2013
Business Acquisition [Line Items]    
Intangible assets preliminarily, Amount   $ 8,900,000
Goodwill   1,800,000
Business acquisition cost of acquired entity purchase price   13,900,000
Business acquisition, purchase price allocation, capital lease obligation accrual 4,700,000  
Beall Corporation
    
Business Acquisition [Line Items]    
Intangible assets preliminarily, Amount   8,860,000
Goodwill   1,784,000
Business acquisition cost of acquired entity purchase price   $ 13,931,000