Quarterly report pursuant to sections 13 or 15(d)

Goodwill - Summary of Changes to Carrying Amount of Goodwill (Detail)

v2.4.0.8
Goodwill - Summary of Changes to Carrying Amount of Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Goodwill [Line Items]    
Beginning, Gross balance $ 33,306 $ 32,098
Beginning, Accumulated impairment losses (17,415) (17,415)
Beginning, Net balance 15,891 14,683
Purchase price adjustments from earnouts    1,061
Ending, Gross balance 35,651 33,306
Ending, Accumulated impairment losses (17,415) (17,415)
Ending, Net balance 18,236 15,891
Commodity Advisors
   
Goodwill [Line Items]    
Goodwill, Acquisition    147
Ten-Sixty
   
Goodwill [Line Items]    
Goodwill, Acquisition 2,345  
Ending, Net balance $ 2,345