Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details)

v2.4.0.6
Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Earn-out obligations - current $ 0 $ 4,153
Earn-out obligations, less current portion 9,098 16,415
Offset amount included in accumulated other comprehensive loss, net of tax 457 430
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance as of December 31, 2011 20,568  
Earn-out payments (7,133)  
Fair value adjustment included in earnings (4,337)  
Reclassification from long-term to short-term 0  
Balance as of December 31, 2012 9,098  
Short Term Obligations [Member]
    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance as of December 31, 2011 4,153  
Earn-out payments (7,133)  
Fair value adjustment included in earnings 0  
Reclassification from long-term to short-term 2,980  
Balance as of December 31, 2012 0  
Long Term Earn Out Obligations [Member]
    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance as of December 31, 2011 16,415  
Earn-out payments 0  
Fair value adjustment included in earnings (4,337)  
Reclassification from long-term to short-term (2,980)  
Balance as of December 31, 2012 9,098  
Akimeka Acquisition [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Increase (decrease) in earn-out obligation (5,100)  
WBI Acquisition [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Increase (decrease) in earn-out obligation 802  
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Assets [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Non-COLI assets held in DSC plan 120 300
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Accrued Expenses [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swaps 1,194 1,122
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Accrued Expenses [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Earn-out obligations - current 0 4,153
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Earn-out Obligations [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Earn-out obligations, less current portion $ 9,098 $ 16,415