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Fair Value Measurements (Fair Value, Recurring and Nonrecurring, Valuation Techniques) (Details) (USD $)
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9 Months Ended | ||||||||||
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Sep. 30, 2013
Discount Rate
Contingent Payments
Level 3
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Sep. 30, 2013
Discount Rate
Available-for-sale Securities
Level 3
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Sep. 30, 2013
CRDA Reserves
CRDA Deposits
Level 3
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Sep. 30, 2013
Risk-free Interest Rate
Merger Earnout
Level 3
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Sep. 30, 2013
Risk-adjusted Discount Rate
Merger Earnout
Level 3
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Sep. 30, 2013
EBITDA volatility
Merger Earnout
Level 3
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Sep. 30, 2013
Fair Value, Measurements, Recurring
Carrying Value
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Sep. 30, 2013
Fair Value, Measurements, Recurring
Level 3
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Dec. 31, 2012
Fair Value, Measurements, Recurring
Level 3
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Sep. 30, 2013
Peninsula Gaming
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Dec. 31, 2012
Peninsula Gaming
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| Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | |||||||||||
| Contingent Consideration, Liability for Payments to Option Holder, Noncurrent | $ 3,500,000 | $ 3,600,000 | |||||||||
| Investment available for sale | 22,100,000 | 17,937,000 | 17,907,000 | ||||||||
| Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage | 18.50% | 10.50% | 33.30% | 0.40% | 14.50% | 21.30% | |||||
| Debt Security, Interest Rate, Stated Percentage | 7.50% | ||||||||||
| Available-for-sale Securities, Current | 400,000 | 300,000 | |||||||||
| Available-for-sale Securities | 17,600,000 | 17,600,000 | |||||||||
| Fair Value, Discount Amount, Available for sales securities | $ 3,500,000 | $ 3,600,000 | |||||||||