Long-Term Debt (Narrative) (Details) € in Millions, £ in Millions, zł in Millions, $ in Millions			3 Months Ended				9 Months Ended
	May 04, 2018 CAD ($)	May 04, 2018 USD ($)	Sep. 30, 2018 CAD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 CAD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 PLN (zł) item	Sep. 30, 2018 CAD ($) item	Sep. 30, 2018 USD ($) item	Sep. 30, 2017 CAD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 GBP (£) item	Sep. 30, 2018 EUR (€) item	Sep. 30, 2018 PLN (zł) item	Sep. 30, 2018 CAD ($) item	Sep. 30, 2018 USD ($) item	Dec. 31, 2017 USD ($)	Sep. 30, 2016 CAD ($)	Aug. 31, 2014 CAD ($)	May 31, 2012 CAD ($)
Debt Instrument [Line Items]
Amortization of deferred financing costs									$ 92,000		$ 118,000
Amount outstanding																$ 53,535,000	$ 56,971,000
total debt																$ 53,285,000	$ 56,713,000
Casinos Poland Ltd [Member]
Debt Instrument [Line Items]
Deposits or bank guarantees for payment of casino jackpots and gaming tax obligations under gaming law | zł														zł 6.0
Century Downs Racetrack And Casino [Member]
Debt Instrument [Line Items]
Options to Purchase Land | item							4	4	4
Number of capital lease agreements | item												3	3	3	3	3
Capital lease agreements															$ 0.1	$ 100,000
Interest rate on financing obligation							0.00%	0.00%	0.00%
Century Casino Bath [Member]
Debt Instrument [Line Items]
Line of credit facility												£ 2.0				$ 2,600,000
Expiration date							Sep. 01, 2023	Sep. 01, 2023	Sep. 01, 2023
Guaranteed amount									$ 600,000
Interest rate percentage points							1.625%	1.625%	1.625%
Century Resorts Alberta [Member]
Debt Instrument [Line Items]
Number of capital lease agreements | item												2	2	2	2	2
Capital lease agreements															$ 0.1	$ 100,000
Capital Lease- CAL [Member]
Debt Instrument [Line Items]
Number of capital lease agreements | item												2	2	2	2	2
Capital lease agreements															$ 0.1	$ 100,000
Capital Lease CSA [Member]
Debt Instrument [Line Items]
Capital lease agreements															0.1	$ 100,000
BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity															$ 102.2			$ 69.2	$ 39.1	$ 28.0
Approved borrowing capacity	$ 33.0	$ 25,500,000
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								$ 4.0
Line of credit facility															43.1	$ 33,300,000
Line of credit facility amount available for borrowing															39.8	$ 30,800,000
Standby fees			$ 0.1	$ 100,000	$ 0.1	$ 100,000		$ 0.1	$ 100,000	$ 0.1	100,000
Line of credit facility amount that cannot be reborrowed once repaid															$ 63.9
BMO Credit Agreement [Member] | Measurement Input, EBITDA Multiple [Member]
Debt Instrument [Line Items]
EBITDA																4.00
BMO Credit Agreement [Member] | Interest Rate Swap Liability [Member]
Debt Instrument [Line Items]
CDOR exchange rate												3.92	3.92	3.92	3.92	3.92
Notional Value															$ 6.8	$ 5,300,000
Debt instrument maturity date							Aug. 01, 2019	Aug. 01, 2019	Aug. 01, 2019
BMO Credit Agreement [Member] | Interest Rate Swap Second Agreement [Member]
Debt Instrument [Line Items]
CDOR exchange rate												3.89	3.89	3.89	3.89	3.89
Notional Value															$ 6.8	$ 5,300,000
Debt instrument maturity date							Aug. 01, 2019	Aug. 01, 2019	Aug. 01, 2019
BMO Credit Agreement [Member] | Interest Rate Swap Third Agreement [Member]
Debt Instrument [Line Items]
CDOR exchange rate												4.08	4.08	4.08	4.08	4.08
Notional Value															$ 12.0	$ 9,300,000
Debt instrument maturity date							Dec. 01, 2021	Dec. 01, 2021	Dec. 01, 2021
BMO Credit Agreement [Member] | Casinos Poland Ltd [Member]
Debt Instrument [Line Items]
Deposits maintained for payment of casino jackpots and gaming tax obligations														zł 1.7		500,000
Line of Credit with mBank [Member] | Casinos Poland Ltd [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł														5.0
Line of credit facility														3.3		900,000
Expiration date							Mar. 28, 2019	Mar. 28, 2019	Mar. 28, 2019
Line of credit facility amount available for borrowing														1.7		500,000
Interest rate percentage points							1.40%	1.40%	1.40%
Line Of Credit With Alior Bank [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł														13.0
Expiration date							Mar. 20, 2019	Mar. 20, 2019	Mar. 20, 2019
Line Of Credit With Alior Bank [Member] | Casinos Poland Ltd [Member]
Debt Instrument [Line Items]
Line of credit amount that can only be used to secure bank guarantees | zł							zł 2.0
Line of credit facility														5.0		1,400,000
Line of credit facility amount available for borrowing														4.9		1,400,000
Guaranteed amount							zł 3.1		$ 900,000
Interest rate percentage points							1.85%	1.85%	1.85%
Guarantee From mBank [Member] | Casinos Poland Ltd [Member]
Debt Instrument [Line Items]
Expiration date							Oct. 31, 2019	Oct. 31, 2019	Oct. 31, 2019
Bank guarantee issued for payment of casino jackpots and gaming tax obligations														6.0		1,700,000
Deposits maintained for payment of casino jackpots and gaming tax obligations														zł 0.4		100,000
Capital Leases [Member]
Debt Instrument [Line Items]
Amount outstanding																253,000
Century Mile Racetrack and Casino [Member]
Debt Instrument [Line Items]
Capital lease agreements															0.1	100,000
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							Aug. 01, 2019	Aug. 01, 2019	Aug. 01, 2019
Line of credit facility amount available for borrowing															1.1	$ 800,000
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							Aug. 01, 2019	Aug. 01, 2019	Aug. 01, 2019
Line of credit facility amount available for borrowing															$ 0.0
Credit Facility B [Member] | BMO Credit Agreement [Member] | Casinos Poland Ltd [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							Aug. 01, 2019	Aug. 01, 2019	Aug. 01, 2019
Line of credit facility amount available for borrowing															5.7	$ 4,400,000
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. 01, 2021	Sep. 01, 2021	Sep. 01, 2021
Line of credit facility amount available for borrowing															0.0
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	2,300,000
Credit Facility F [Member]
Debt Instrument [Line Items]
Line of credit facility															33.0
Expiration date							Aug. 24, 2019	Aug. 24, 2019	Aug. 24, 2019
Line of credit facility amount available for borrowing															33.0	25,500,000
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															$ 2.0	1,500,000
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			$ 8,100,000
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]
Borrowing terms							1 month	1 month	1 month
UniCredit Agreement Term 2 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Borrowing terms							3 months	3 months	3 months
UniCredit Agreement Term 3 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Borrowing terms							6 months	6 months	6 months
UniCredit Agreement Term 4 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Borrowing terms							9 months	9 months	9 months
UniCredit Agreement Term 5 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Borrowing terms							12 months	12 months	12 months
Minimum [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Standby fees, percentage							0.50%	0.50%	0.50%
Maximum [Member] | BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Standby fees, percentage							0.75%	0.75%	0.75%
Amortization of deferred financing costs									$ 100,000		$ 100,000
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	$ 15,000,000