Long-Term Debt (Narrative) (Details) $ in Thousands, € in Millions, £ in Millions, zł in Millions, $ in Millions			3 Months Ended	9 Months Ended
		Sep. 30, 2020 USD ($) item	Sep. 30, 2020 USD ($) item	Sep. 30, 2020 USD ($) item	Sep. 30, 2020 PLN (zł) item	Sep. 30, 2019 USD ($)	Sep. 30, 2020 PLN (zł) item	Sep. 30, 2020 GBP (£) item	Sep. 30, 2020 EUR (€) item	Sep. 30, 2020 CAD ($) item	Jul. 31, 2020 USD ($)	Apr. 01, 2020	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 06, 2019 USD ($)	Aug. 31, 2018 EUR (€)	Aug. 31, 2017 GBP (£)
Debt Instrument [Line Items]
Amortization of deferred financing costs				$ 1,222		$ 80
Amount outstanding		$ 193,757	$ 193,757	193,757										$ 188,961
Principal payments				118		$ 250
Macquarie Capital [Member]
Debt Instrument [Line Items]
Deferred financing costs		11,000	11,000	11,000
Amortization of deferred financing costs			400	1,200
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	$ 200			zł 0.9
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%
Prepayment premium percentage				1.00%	1.00%
Maturity date				Dec. 06, 2026	Dec. 06, 2026
Amount outstanding		$ 168,700	$ 168,700	$ 168,700
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 Greater Than 2.75 [Member]
Debt Instrument [Line Items]
Percentage of annual excess cash flow				75.00%	75.00%
Term Loan [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Greater 2.50 [Member]
Debt Instrument [Line Items]
Percentage of annual excess cash flow				50.00%	50.00%
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%	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%	4.50%
UniCredit Loan [Member]
Debt Instrument [Line Items]
Amount outstanding	[1]	$ 1,547	$ 1,547	$ 1,547										$ 1,983
UniCredit Loan [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Line of credit facility		1,500	1,500	$ 1,500				£ 1.2									£ 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	1,300			5.0
Amount outstanding		0	0	$ 0
Line of Credit with mBank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points				1.80%	1.80%
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	$ 900
Deposits maintained for payment of casino jackpots and gaming tax obligations		900	900	900			3.6
Deposit for secured by land owned		300	300	300			zł 1.2
Guarantee From Alior Bank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Guaranteed amount				200	zł 0.9
Revolving Credit Facility [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity															$ 10,000
Line of credit facility amount available for borrowing		$ 9,950	$ 9,950	$ 9,950
Percentage of principal amount of unused commitments				0.50%	0.50%
Fronting fee percentage				0.125%	0.125%
Revolving credit facility, amount drew													$ 9,950
Maturity date				Dec. 06, 2024	Dec. 06, 2024
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
Line of credit facility											$ 50
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] | Credit Agreements With Mbank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Number of credit agreements | item		4	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		$ 400	$ 400	$ 400			1.7
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	$ 600			2.3
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		400	$ 400	$ 400			zł 1.7
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													$ 7,400			€ 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	2.25
Minimum [Member] | Term Loan [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	2.75
Minimum [Member] | Term Loan [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Greater 2.50 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio		2.50	2.50	2.50			2.50	2.50	2.50	2.50
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	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	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	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	0.6
Minimum [Member] | Revolving Credit Facility - Financial Covenant [Member]
Debt Instrument [Line Items]
Line of credit facility		$ 3,500	$ 3,500	$ 3,500
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		2.50	2.50	2.50			2.50	2.50	2.50	2.50
Maximum [Member] | Term Loan [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Less Than Or Equal To 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	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	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	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	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	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	70
Century Downs Racetrack And Casino [Member]
Debt Instrument [Line Items]
Outstanding balance on financing obligation		$ 14,600	$ 14,600	$ 14,600						$ 19.5

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