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Commitments, Contingencies And Other Matters (Narrative) (Details) $ in Thousands, PLN in Millions | 12 Months Ended | 36 Months Ended |  |
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Dec. 31, 2017 PLN item | Dec. 31, 2017 USD ($) item | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2017 PLN | Dec. 31, 2017 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2015 PLN | Dec. 31, 2015 USD ($)
Commitments and Contingencies [Line items] |  |  |  |  |  |  |  |  |
Contingent liability |  |  | $ 2,099 |  |  |  | $ 1,833 |  |
Distribution to non-controlling interest |  | $ 2,043 | 1,897 | $ 507 |  |  |  |  |
Rental expenses |  | 4,600 | $ 3,900 | 3,900 |  |  |  |  |
Lot Polish Airlines Invesment [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |  |  |  |  |
Owned by noncontrolling interest | 33.30% |  | 33.30% |  | 33.30% |  | 33.30% |  |
Awarded arbitration | PLN 1.2 | 300 |  |  |  |  |  |  |
Casinos Poland Ltd [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |  |  |  |  |
Income tax audit costs |  |  |  |  | PLN 9.4 | $ 2,900 |  |  |
Century Downs Racetrack And Casino [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |  |  |  |  |
Owned by noncontrolling interest | 25.00% |  |  |  | 25.00% |  | 25.00% |  |
Distribution to non-controlling interest |  | 600 | $ 1,600 |  |  |  |  |  |
Review of Tax Year 2010 [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |  |  |  |  |
Contingent liability | PLN 6.3 |  |  |  | PLN 6.3 |  | $ 1,800 |  |
Reduction to contingent liability |  |  |  |  |  |  |  | PLN 3.4 | $ 900
Review of Tax Years 2012 and 2013 [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |  |  |  |  |
Income tax audit costs | PLN 4.8 | $ 1,400 |  |  |  |  |  |  |
401K Plan [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |  |  |  |  |
Vesting period for plan | 6 years | 6 years |  |  |  |  |  |  |
Contributed to plan |  | $ 100 | 100 | 100 |  |  |  |  |
RSP And RPP Plans [Member] |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line items] |  |  |  |  |  |  |  |  |
Vesting period for plan | 2 years | 2 years |  |  |  |  |  |  |
Number of registered retirement plans in Canada | item | 2 | 2 |  |  |  |  |  |  |
Contributed to plan |  | $ 200 | $ 200 | $ 100 |  |  |  |  |

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