Long-Term Debt (Narrative) (Details) $ in Thousands, € in Millions, £ in Millions, zł in Millions, $ in Millions			3 Months Ended				9 Months Ended
	Oct. 31, 2019	Apr. 25, 2019	Sep. 30, 2019 CAD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 CAD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 CAD ($) item	Sep. 30, 2019 PLN (zł) item	Sep. 30, 2019 USD ($) item	Sep. 30, 2018 CAD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 GBP (£) item	Sep. 30, 2019 EUR (€) item	Sep. 30, 2019 CAD ($) item	Sep. 30, 2019 PLN (zł) item	Sep. 30, 2019 USD ($) item	May 31, 2019	Apr. 09, 2019 PLN (zł)	Dec. 31, 2018 USD ($)	Aug. 31, 2017 GBP (£)	Sep. 30, 2016 CAD ($)	Aug. 31, 2014 CAD ($)	May 31, 2012 CAD ($)
Debt Instrument [Line Items]
Amortization of deferred financing costs									$ 80		$ 92
Amount outstanding																$ 71,456			$ 60,019
total debt																71,069			$ 59,523
Principal payments									$ 250
Casinos Poland [Member]
Debt Instrument [Line Items]
Deposits or bank guarantees for payment of casino jackpots and gaming tax obligations under gaming law | zł															zł 4.8
Century Downs Racetrack And Casino [Member]
Debt Instrument [Line Items]
Options to purchase land | item							4	4	4
First option date							Jul. 01, 2023	Jul. 01, 2023	Jul. 01, 2023
Principal payments									$ 0
Century Casino Bath [Member]
Debt Instrument [Line Items]
Line of credit facility												£ 1.6				$ 2,000				£ 2.0
Expiration date							Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2023
Guaranteed amount									$ 600
Century Casino Bath [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points							1.625%	1.625%	1.625%
BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity														$ 102.2							$ 69.2	$ 39.1	$ 28.0
Fixed Charge Coverage Ratio												1.00	1.00	1.00	1.00	1.00
Required minimum equity balance under debt covenant														$ 50.0
Required maximum capital expenditure limit under debt covenant							$ 5.5
Line of credit facility														69.4		$ 52,400
Outstanding balance														1.3		1,000
Line of credit facility amount available for borrowing														8.5		$ 6,400
Standby fees			$ 0.1		$ 0.1		$ 0.1			$ 0.1
Line of credit facility amount that cannot be reborrowed once repaid														$ 96.1
Lease term																	5 years
BMO Credit Agreement [Member] | Measurement Input, EBITDA Multiple [Member]
Debt Instrument [Line Items]
EBITDA ratio | item												4.00	4.00	4.00	4.00	4.00
BMO Credit Agreement [Member] | Interest Rate Swap Third Agreement [Member]
Debt Instrument [Line Items]
Notional amount														$ 10.5		$ 7,900
Exchange rate												4.83	4.83	4.83	4.83	4.83
Maturity date							Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2021
BMO Credit Agreement [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Deposits maintained for payment of casino jackpots and gaming tax obligations															zł 1.4	$ 400
Line of Credit with mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł															5.0
Line of credit facility amount available for borrowing															5.0	1,200
Interest rate percentage points							1.40%	1.40%	1.40%
Amount outstanding																0
Line Of Credit With Alior Bank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł															13.0
Line of credit amount that can only be used to secure bank guarantees | zł								zł 2.0
Line of credit facility amount available for borrowing															8.6	2,100
Guaranteed amount								zł 3.3	$ 800
Interest rate percentage points							1.55%	1.55%	1.55%
Amount outstanding															1.1	300
Guarantee From mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Bank guarantee issued for payment of casino jackpots and gaming tax obligations															4.8	1,200
Deposits maintained for payment of casino jackpots and gaming tax obligations															zł 1.1	300
Credit Facility A [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Term of credit agreement							5 years	5 years	5 years
Line of credit facility														$ 1.1
Expiration date							Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2021
Line of credit facility amount available for borrowing														1.1		800
Credit Facility B [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Term of credit agreement							5 years	5 years	5 years
Line of credit facility														$ 24.1
Expiration date							Jan. 31, 2020	Jan. 31, 2020	Jan. 31, 2020
Line of credit facility amount available for borrowing																$ 0
Credit Facility B [Member] | BMO Credit Agreement [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Ownership acquired												33.30%	33.30%	33.30%	33.30%	33.30%
Credit Facility C [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Term of credit agreement							5 years	5 years	5 years
Line of credit facility														$ 11.0
Expiration date							Jan. 31, 2020	Jan. 31, 2020	Jan. 31, 2020
Line of credit facility amount available for borrowing														6.5		$ 4,900
Credit Facility D [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Term of credit agreement							5 years	5 years	5 years
Line of credit facility														30.0
Expiration date							Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2021
Line of credit facility amount available for borrowing																0
Credit Facility E [Member] | Treasury Risk Management Facility [Member]
Debt Instrument [Line Items]
Term of credit agreement							5 years	5 years	5 years
Line of credit facility														3.0		2,300
Credit Facility F [Member]
Debt Instrument [Line Items]
Line of credit facility														33.0
Expiration date							Jan. 31, 2020	Jan. 31, 2020	Jan. 31, 2020
Line of credit facility amount available for borrowing														0.8		600
Credit Facility G [Member]
Debt Instrument [Line Items]
Term of credit agreement							5 years	5 years	5 years
Credit Facility H [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Line of credit facility														2.0
Line of credit facility amount available for borrowing														$ 0.7		$ 500
Credit Facility B, C, And F [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Maturity date							Oct. 31, 2019	Oct. 31, 2019	Oct. 31, 2019
Credit Facility B, C, And F [Member] | BMO Credit Agreement [Member] | Extended Maturity [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Maturity date	Jan. 31, 2020
Credit Agreement [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Number of credit agreements | item												4	4	4	4	4
Credit Agreement [Member] | Line of Credit with mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Expiration date		Mar. 30, 2020
Credit Agreement Through April 2021 [Member] | Line Of Credit With Alior Bank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł																		zł 4.0
First Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł															zł 3.0
Expiration date							Nov. 30, 2021	Nov. 30, 2021	Nov. 30, 2021
Term of borrowing							3 years	3 years	3 years
Amount outstanding															2.6	$ 600
Borrowing availability									$ 0
Required amount to maintain in cash inflows and financial covenants | zł								zł 1.0
First Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points							1.70%	1.70%	1.70%
Second Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł															4.0
Expiration date							Nov. 30, 2021	Nov. 30, 2021	Nov. 30, 2021
Term of borrowing							3 years	3 years	3 years
Amount outstanding															3.5	900
Borrowing availability									$ 0
Required amount to maintain in cash inflows and financial covenants | zł								zł 7.0
Second Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points							1.70%	1.70%	1.70%
Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł															2.5
Expiration date							Nov. 30, 2022	Nov. 30, 2022	Nov. 30, 2022
Term of borrowing							4 years	4 years	4 years
Amount outstanding															zł 2.3	600
Borrowing availability									$ 0
Required amount to maintain in cash inflows and financial covenants | zł								zł 7.0
Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points							1.90%	1.90%	1.90%
UniCredit Agreement [Member]
Debt Instrument [Line Items]
Amount outstanding																0
UniCredit Agreement [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Line of credit facility													€ 7.0			$ 7,600
Line of credit facility secured amount | €													€ 7.0
UniCredit Agreement [Member] | Century Resorts Management [Member] | EURIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points							1.50%	1.50%	1.50%
UniCredit Agreement [Member] | Century Resorts Management [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points							1.50%	1.50%	1.50%
UniCredit Agreement Term 1 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing							1 month	1 month	1 month
UniCredit Agreement Term 2 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing							3 months	3 months	3 months
UniCredit Agreement Term 3 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing							6 months	6 months	6 months
UniCredit Agreement Term 4 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing							9 months	9 months	9 months
UniCredit Agreement Term 5 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing							12 months	12 months	12 months
Minimum [Member]
Debt Instrument [Line Items]
Lease term												1 month	1 month	1 month	1 month	1 month
Minimum [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Standby fees, percentage							0.50%	0.50%	0.50%
Minimum [Member] | First Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin							0.30%	0.30%	0.30%
Minimum [Member] | Second Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin							0.50%	0.50%	0.50%
Liquidity ratio												0.6	0.6	0.6	0.6	0.6
Minimum [Member] | Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin							0.50%	0.50%	0.50%
Liquidity ratio												0.6	0.6	0.6	0.6	0.6
Maximum [Member]
Debt Instrument [Line Items]
Lease term												28 years	28 years	28 years	28 years	28 years
Maximum [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Standby fees, percentage							0.75%	0.75%	0.75%
Standby fees				$ 100		$ 100			$ 100		100
Amortization of deferred financing costs									$ 100		$ 100
Maximum [Member] | First Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin							0.40%	0.40%	0.40%
Liquidity ratio												1.3	1.3	1.3	1.3	1.3
Debt ratio												60	60	60	60	60
Maximum [Member] | Second Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Debt ratio												70	70	70	70	70
Maximum [Member] | Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Debt ratio												70	70	70	70	70
Century Downs Racetrack And Casino [Member]
Debt Instrument [Line Items]
Ownership percentage												75.00%	75.00%	75.00%	75.00%	75.00%
Outstanding balance on financing obligation														$ 19.5		$ 14,700