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Acquisitions - Additional Information (Detail) (USD $) | Mar. 31, 2014 | Feb. 28, 2013
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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

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