v2.4.0.6
Fair Value Measurements (Fair Value, Recurring and Nonrecurring, Valuation Techniques) (Details) (Level 3)
 3 Months Ended
Mar. 31, 2013
Discount Rate | Contingent Consideration Liability [Member]
  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage 18.50%
Discount Rate | Available-for-sale Securities [Member]
  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage 10.50%
CRDA Reserves | CRDA Deposits [Member]
  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage 33.00%
Risk-free Interest Rate | Earnout on Excess of EBITDA in 2015
  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage 0.40%
Risk-adjusted Discount Rate | Earnout on Excess of EBITDA in 2015
  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage 14.50%
EBITDA volatility | Earnout on Excess of EBITDA in 2015
  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage 21.30%