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Fair Value Measurements (Balance Measured at Fair Value) (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and Cash Equivalents, at Carrying Value | $ 124,523 | $ 145,341 | $ 162,512 | $ 177,838
Restricted Cash and Cash Equivalents, Current | 21,486 | 18,107 |  |
Fair Value, Measurements, Recurring [Member] | Level 1 |  |  |  |
Assets |  |  |  |
Investment available for sale | 0 | 0 |  |
Liabilities |  |  |  |
Merger earnout |  | 0 |  |
Business Combination, Contingent Consideration, Liability | 0 | 0 |  |
Fair Value, Measurements, Recurring [Member] | Level 2 |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Restricted cash | 0 | 0 |  |
Investment available for sale | 0 | 0 |  |
Liabilities |  |  |  |
Merger earnout |  | 0 |  |
Business Combination, Contingent Consideration, Liability | 0 | 0 |  |
Fair Value, Measurements, Recurring [Member] | Level 3 |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Restricted cash | 0 | 0 |  |
Investment available for sale | 17,276 | 18,357 |  |
Liabilities |  |  |  |
Merger earnout |  | 75 |  |
Business Combination, Contingent Consideration, Liability | 3,642 | 3,792 |  |
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 124,523 | 145,341 |  |
Restricted cash | 21,486 | 18,107 |  |
Investment available for sale | 17,276 | 18,357 |  |
Liabilities |  |  |  |
Merger earnout |  | 75 |  |
Business Combination, Contingent Consideration, Liability | 3,642 | 3,792 |  |
Parent |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Long-term Debt, Gross | 2,361,810 | 2,389,165 |  |
Long-term debt, net | 2,349,293 | 2,368,988 |  |
Assets |  |  |  |
Cash and Cash Equivalents, at Carrying Value | 0 | 2 | $ 3,806 | $ 0
Estimate of Fair Value Measurement [Member] | Parent | Fair Value, Measurements, Nonrecurring [Member] | Level 3 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Commitments, Fair Value Disclosure | 28,157 | 29,529 |  |
Liabilities |  |  |  |
Other Financial Instruments | 178 | 268 |  |
Outstanding Face Amount | Parent | Fair Value, Measurements, Nonrecurring [Member] | Level 3 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Commitments, Fair Value Disclosure | 35,943 | 36,749 |  |
Liabilities |  |  |  |
Other Financial Instruments | 200 | 300 |  |
Other | Holdco Note [Member] | Parent |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Long-term debt, net |  | 139,997 |  |
Other | Holdco Note [Member] | Outstanding Face Amount | Parent | Fair Value, Measurements, Nonrecurring [Member] | Level 3 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Long-term Debt, Gross | 157,810 |  |  |
Peninsula Gaming |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Current | 400 |  |  |
Assets |  |  |  |
Investment available for sale | 16,900 | $ 18,000 |  |
Liabilities |  |  |  |
Fair Value, Discount Amount, Available for sales securities | $ 3,300 |  |  |

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