Annual report pursuant to section 13 and 15(d)

Acquisitions - Summary of Purchase Consideration (Detail)

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Acquisitions - Summary of Purchase Consideration (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
MW Commodity Advisors, LLC
 
Business Acquisition [Line Items]  
Units issued $ 132
Call rights option issued 15
Total purchase consideration 147
Ten-Sixty
 
Business Acquisition [Line Items]  
Total purchase consideration 4,092
Cash paid on date of acquisition 2,500
Note payable due to Ten-Sixty $ 1,592