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Fair Value Measurements (Fair Value Inputs, Liabilities, Quantitative Information) (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Contingent Consideration Liability [Member]
Dec. 31, 2012
Contingent Consideration Liability [Member]
Dec. 31, 2011
Contingent Consideration Liability [Member]
Dec. 31, 2013
Fair Value, Inputs, Level 2
Dec. 31, 2013
Significant Unobservable Inputs (Level 3)
Contingent Consideration Liability [Member]
Minimum
Dec. 31, 2013
Significant Unobservable Inputs (Level 3)
Contingent Consideration Liability [Member]
Maximum [Member]
Dec. 31, 2013
Whitaker [Member]
Significant Unobservable Inputs (Level 3)
Contingent Consideration Liability [Member]
Dec. 31, 2013
Whitaker [Member]
Significant Unobservable Inputs (Level 3)
Contingent Consideration Liability [Member]
Minimum
Dec. 31, 2013
Whitaker [Member]
Significant Unobservable Inputs (Level 3)
Contingent Consideration Liability [Member]
Maximum [Member]
Dec. 31, 2013
CyberCoders [Member]
Significant Unobservable Inputs (Level 3)
Contingent Consideration Liability [Member]
Dec. 31, 2013
CyberCoders [Member]
Significant Unobservable Inputs (Level 3)
Contingent Consideration Liability [Member]
Minimum
Dec. 31, 2013
CyberCoders [Member]
Significant Unobservable Inputs (Level 3)
Contingent Consideration Liability [Member]
Maximum [Member]
Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 1 [Member]
Dec. 31, 2012
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 1 [Member]
Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 2
Dec. 31, 2012
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 2
Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
Significant Unobservable Inputs (Level 3)
Dec. 31, 2012
Fair Value, Measurements, Recurring [Member]
Significant Unobservable Inputs (Level 3)
Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
Dec. 31, 2012
Fair Value, Measurements, Recurring [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value Inputs, Liabilities, Quantitative Information                                          
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value   $ 8,527,000 $ 7,577,000 $ 9,856,000                                  
Obligations, Fair Value Disclosure                           0 0 0 0 8,527,000 7,577,000 8,527,000 7,577,000
Long-term debt 399,813,000                                        
Long-term debt, fair value         400,200,000                                
Probability of occurrence of scenarios (as a percentage)           10.00% 60.00%                            
Fair Value Inputs, Weighting Given to Base Case Scenario               60.00%     50.00%                    
Revenue growth rates (as a percentage)                 2.00% 15.00%   9.60% 25.00%                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Acquisitions   7,860,000 0                                    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Payments   3,425,000 1,198,000                                    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements   0 0                                    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings   (3,584,000) (1,215,000)                                    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)   $ 99,000 $ 134,000