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           Acquisitions - Summary of Purchase Consideration (Detail) (Ten-Sixty, USD $) 
        In Thousands, unless otherwise specified  | 
        0 Months Ended | 6 Months Ended | 
|---|---|---|
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           Mar. 28, 2013 
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           Jun. 30, 2014 
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           Ten-Sixty 
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| Business Acquisition [Line Items] | ||
| Cash paid on date of acquisition | $ 2,500 | $ 2,500 | 
| Note payable due to Ten-Sixty | 1,592 | |
| Total purchase consideration | $ 4,092 | 
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- Definition 
          Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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