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Acquisitions (Details) (USD $)
3 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended 3 Months Ended
Jun. 30, 2011
Jun. 30, 2011
Jun. 30, 2011
Ross Smith Energy Group Ltd. ("RSEG")
Jun. 30, 2011
Ross Smith Energy Group Ltd. ("RSEG")
Jun. 03, 2011
Ross Smith Energy Group Ltd. ("RSEG")
Jun. 30, 2011
Ross Smith Energy Group Ltd. ("RSEG")
Customer related intangibles
Jun. 30, 2011
Customer related intangibles
Acquisitions              
Minimum number of new clients         200    
Acquisition related costs $ 2,500,000 $ 2,500,000 $ 700,000        
Costs related with termination of a distribution agreement         1,800,000    
Costs related with termination of distribution agreement, portion recoverable from RSEG's former owners         1,000,000    
Purchase price allocation              
Cash         2,540,000    
Accounts receivable, net         1,422,000    
Customer related intangible asset         6,950,000    
Accounts payable and accrued liabilities         (1,505,000)    
Deferred income         (2,151,000)    
Other assets and liabilities, net         611,000    
Goodwill         30,715,000    
Total purchase price         $ 38,582,000    
Number of years over which goodwill is deductible for tax purposes (in years)       15      
Useful lives (in years)           10 7.8