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Fair Value Measurements (Fair Value, Recurring and Nonrecurring, Valuation Techniques) (Details) - USD ($) $ in Thousands | 6 Months Ended |
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Jun. 30, 2015 | Dec. 31, 2014
Discount Rate | Contingent Payments | Level 3 |  |
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 | Level 3 |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage | 10.39% |
Fair Value, Measurements, Recurring [Member] | Carrying Value |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment available for sale | $ 21,400 |
Fair Value, Measurements, Recurring [Member] | Level 3 |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Investment available for sale | 17,276 | $ 18,357
Peninsula Gaming |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Business Combination, Contingent Consideration, Liability for Payments to Option Holder, Noncurrent | 2,800 | 2,900
Investment available for sale | 16,900 | $ 18,000
Available-for-sale Securities, Current | 400 |
Fair Value, Discount Amount, Available for sales securities | $ 3,300 |

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