Commitments And Contingencies (Narrative) (Details) $ in Thousands, zł in Millions	9 Months Ended
	Sep. 30, 2018 PLN (zł)	Sep. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2013
Commitments and Contingencies [Line items]
Contingent liability			$ 830	$ 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 3.0		$ 800