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Geographic Information and Major Clients - Additional Information (Detail)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Customer
Jun. 30, 2014
Customer
Jun. 30, 2015
Customer
Unit
Segment
Jun. 30, 2014
Customer
Dec. 31, 2014
Geographic information and major clients          
Number of reportable segment, digital enterprise business solutions     1    
Number of reporting unit | Unit     1    
Clients accounting for 10% or more of total revenue     There were no clients accounting for 10% or more of the Company's total revenue during the second quarter and first six months of 2015 and 2014.    
Number of clients representing 10% or more of Company's total revenue | Customer 0 0 0 0  
Credit Concentration Risk | Total Revenue | Minimum          
Geographic information and major clients          
Concentration risk, percentage 10.00% 10.00% 10.00% 10.00%  
Credit Concentration Risk | Accounts receivable | Minimum          
Geographic information and major clients          
Concentration risk, percentage     10.00%   10.00%