Long-Term Debt (Narrative) (Details) $ in Thousands, € in Millions, £ in Millions, zł in Millions, $ in Millions			3 Months Ended		6 Months Ended
		Apr. 25, 2019	Jun. 30, 2020 USD ($) item	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($) item	Jun. 30, 2020 PLN (zł) item	Jun. 30, 2019 USD ($)	Jul. 30, 2020 USD ($)	Jun. 30, 2020 PLN (zł) item	Jun. 30, 2020 GBP (£) item	Jun. 30, 2020 EUR (€) item	Jun. 30, 2020 CAD ($) item	Apr. 01, 2020	Dec. 31, 2019 USD ($)	Dec. 06, 2019 USD ($)	Aug. 31, 2018 EUR (€)	Aug. 31, 2017 GBP (£)
Debt Instrument [Line Items]
Amortization of deferred financing costs					$ 813		$ 56
Amount outstanding			$ 203,995		203,995									$ 188,961
Principal payments					79		$ 111
Macquarie Capital [Member]
Debt Instrument [Line Items]
Deferred financing costs			10,700		10,700
Amortization of deferred financing costs			400		800
Casinos Poland [Member]
Debt Instrument [Line Items]
Deposits maintained for payment of casino jackpots and gaming tax obligations | zł									zł 3.6
Deposits guarantees for payment of prizes and giveaways			200		$ 200				zł 0.8
Century Downs Racetrack And Casino [Member]
Debt Instrument [Line Items]
Options to purchase land | item					4	4
First option date					Jul. 01, 2023	Jul. 01, 2023
Principal payments					$ 0
Term Loan [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Percentage of the net cash proceeds of non-ordinary course asset sales or certain casualty events					100.00%	100.00%
Percentage of annual excess cash flow					50.00%	50.00%
Prepayment premium percentage					1.00%	1.00%
Maturity date					Dec. 06, 2026	Dec. 06, 2026
Amount outstanding			$ 169,100		$ 169,100
Pecentage of quarterly payments equal to original principal					0.25%	0.25%
Term Loan [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25, But Less Than 2.75 [Member]
Debt Instrument [Line Items]
Percentage of annual excess cash flow					25.00%	25.00%
Term Loan [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Less Than 2.25 [Member]
Debt Instrument [Line Items]
Percentage of annual excess cash flow					0.00%	0.00%
Term Loan [Member] | Macquarie Capital [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Interest rate			5.50%		5.50%				5.50%	5.50%	5.50%	5.50%
Term Loan [Member] | Macquarie Capital [Member] | ABR [Member]
Debt Instrument [Line Items]
Interest rate			4.50%		4.50%				4.50%	4.50%	4.50%	4.50%
UniCredit Loan [Member]
Debt Instrument [Line Items]
Amount outstanding	[1]		$ 1,606		$ 1,606									$ 1,983
UniCredit Loan [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Line of credit facility			1,600		$ 1,600					£ 1.3							£ 2.0
Expiration date					Sep. 30, 2023	Sep. 30, 2023
Guaranteed amount					$ 600
Borrowing availability					$ 0
UniCredit Loan [Member] | Century Resorts Management [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points					1.625%	1.625%
BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Repayment amount					$ 52,000
Line of Credit with mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł									zł 5.0
Line of credit facility amount available for borrowing			1,300		1,300				5.0
Amount outstanding			0		$ 0
Line of Credit with mBank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points					1.50%	1.50%
Line Of Credit With Alior Bank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points					1.55%	1.55%
Guarantee From mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Bank guarantee issued for payment of casino jackpots and gaming tax obligations			900		$ 900
Deposits maintained for payment of casino jackpots and gaming tax obligations			900		900				3.6
Deposit for secured by land owned			300		300				zł 1.2
Guarantee From Alior Bank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Guaranteed amount					300	zł 1.3
Revolving Credit Facility [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity															$ 10,000
Line of credit facility amount available for borrowing			0		$ 0
Percentage of principal amount of unused commitments					0.50%	0.50%
Fronting fee percentage					0.125%	0.125%
Revolving credit facility, amount drew				$ 10,000
Maturity date					Dec. 06, 2024	Dec. 06, 2024
Amount outstanding			$ 10,000		$ 10,000
Revolving Credit Facility [Member] | Macquarie Capital [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Line of credit facility								$ 0
Revolving Credit Facility [Member] | Macquarie Capital [Member] | LIBOR [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.75 [Member]
Debt Instrument [Line Items]
Interest rate													4.25%
Revolving Credit Facility [Member] | Macquarie Capital [Member] | LIBOR [Member] | Consolidated First Lien Net Leverage Ratio Less Than 2.75 [Member]
Debt Instrument [Line Items]
Interest rate													4.00%
Revolving Credit Facility [Member] | Macquarie Capital [Member] | ABR [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.75 [Member]
Debt Instrument [Line Items]
Interest rate													3.25%
Revolving Credit Facility [Member] | Macquarie Capital [Member] | ABR [Member] | Consolidated First Lien Net Leverage Ratio Less Than 2.75 [Member]
Debt Instrument [Line Items]
Interest rate													3.00%
Letter Of Credit [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity															5,000
Credit Agreement [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity															180,000
Credit Agreement [Member] | Term Loan [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity															$ 170,000
Credit Agreement [Member] | Line of Credit with mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Expiration date		Aug. 27, 2020
Credit Agreement [Member] | Credit Agreements With Mbank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Number of credit agreements | item			4		4				4	4	4	4
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
Term of borrowing					3 years	3 years
Amount outstanding			$ 500		$ 500				1.9
Borrowing availability					$ 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%
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
Term of borrowing					3 years	3 years
Amount outstanding			600		$ 600				2.5
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%
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
Term of borrowing					4 years	4 years
Amount outstanding			500		$ 500				zł 1.8
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%
UniCredit Agreement [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Line of credit facility			$ 7,900	7,400	$ 7,900											€ 7.0
Line of credit facility secured amount | €											€ 7.0
Borrowing availability				$ 0
UniCredit Agreement [Member] | Century Resorts Management [Member] | EURIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points					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%
UniCredit Agreement Term 1 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing					1 month	1 month
UniCredit Agreement Term 2 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing					3 months	3 months
UniCredit Agreement Term 3 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing					6 months	6 months
UniCredit Agreement Term 4 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing					9 months	9 months
UniCredit Agreement Term 5 [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Term of borrowing					12 months	12 months
Minimum [Member] | Term Loan [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25, But Less Than 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			2.25		2.25				2.25	2.25	2.25	2.25
Minimum [Member] | Revolving Credit Facility [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Percentage of principal amount of unused commitments					0.375%	0.375%
Minimum [Member] | Revolving Credit Facility [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			2.75		2.75				2.75	2.75	2.75	2.75
Minimum [Member] | First Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin					0.30%	0.30%
Liquidity ratio			1.3		1.3				1.3	1.3	1.3	1.3
Minimum [Member] | Second Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin					0.50%	0.50%
Liquidity ratio			0.6		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%
Liquidity ratio			0.6		0.6				0.6	0.6	0.6	0.6
Maximum [Member] | Term Loan [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25, But Less Than 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			2.75		2.75				2.75	2.75	2.75	2.75
Maximum [Member] | Term Loan [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Less Than 2.25 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			2.25		2.25				2.25	2.25	2.25	2.25
Maximum [Member] | Revolving Credit Facility [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Commitment fees			$ 100		$ 100
Maximum [Member] | Revolving Credit Facility [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Less Than 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			2.75		2.75				2.75	2.75	2.75	2.75
Maximum [Member] | First Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin					0.40%	0.40%
Debt ratio			60		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	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	70
Century Downs Racetrack And Casino [Member]
Debt Instrument [Line Items]
Outstanding balance on financing obligation			$ 14,300		$ 14,300							$ 19.5

[1] CRM assumed the UniCredit loan to CCB in February 2020.