v2.4.0.8
Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (Fair Value, Measurements, Recurring, USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value assets measured on recurring basis $ 26,296 $ 25,745
Fair value liabilities measured on recurring basis 102,553 111,173
Fair Value, Inputs, Level 2
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value assets measured on recurring basis 26,296 25,745
Fair value liabilities measured on recurring basis 45,462 55,520
Fair Value, Inputs, Level 3
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value liabilities measured on recurring basis 57,091 55,653
Cash surrender value of life insurance
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value assets measured on recurring basis 26,296 25,745
Cash surrender value of life insurance | Fair Value, Inputs, Level 2
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value assets measured on recurring basis 26,296 25,745
Contingent consideration liabilities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value liabilities measured on recurring basis 57,091 55,653
Contingent consideration liabilities | Fair Value, Inputs, Level 3
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value liabilities measured on recurring basis 57,091 55,653
Deferred compensation liabilities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value liabilities measured on recurring basis 26,169 25,232
Deferred compensation liabilities | Fair Value, Inputs, Level 2
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value liabilities measured on recurring basis 26,169 25,232
Foreign currency forward contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value liabilities measured on recurring basis 11,533 21,818
Foreign currency forward contracts | Fair Value, Inputs, Level 2
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value liabilities measured on recurring basis 11,533 21,818
Interest rate swaps
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value liabilities measured on recurring basis 7,760 8,470
Interest rate swaps | Fair Value, Inputs, Level 2
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Fair value liabilities measured on recurring basis $ 7,760 $ 8,470