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Commitments And Contingencies (Narrative) (Details) $ in Thousands, zł in Millions | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2018 PLN (zł) | Jun. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2013
Commitments and Contingencies [Line items] |  |  |  |  |
Contingent liability |  |  | $ 458 | $ 1,833 |
Lot Polish Airlines Invesment [Member] |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |
Owned by noncontrolling interest | 33.30% |  | 33.30% |  | 33.30%
Awarded arbitration | zł 1.2 | $ 300 |  |  |
Casinos Poland Ltd [Member] |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |
Income tax audit costs | zł 14.3 | 4,200 |  |  |
Century Downs Racetrack And Casino [Member] |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |
Owned by noncontrolling interest | 25.00% |  | 25.00% |  |
Review of Tax Years 2012 and 2013 [Member] |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |
Income tax audit costs | zł 4.9 | $ 1,300 |  |  |
Review of All Tax Open Periods [Member] |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |
Contingent liability | zł 1.7 |  | $ 500 |  |

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