Long-Term Debt (Narrative) (Details) $ in Thousands, € in Millions, £ in Millions, zł in Millions, $ in Millions		1 Months Ended	3 Months Ended
	Dec. 06, 2019 USD ($)	Apr. 30, 2021	Mar. 31, 2021 USD ($) item	Mar. 31, 2021 PLN (zł) item	Mar. 31, 2020 USD ($)	Mar. 31, 2021 PLN (zł) item	Mar. 31, 2021 GBP (£) item	Mar. 31, 2021 EUR (€) item	Mar. 31, 2021 CAD ($) item	Dec. 31, 2020 USD ($)	Aug. 31, 2018 EUR (€)	Aug. 31, 2017 GBP (£)
Debt Instrument [Line Items]
Amortization of deferred financing costs			$ 391		$ 398
Amount outstanding			193,290							$ 193,811
Principal payments			33		43
Macquarie Capital [Member]
Debt Instrument [Line Items]
Amortization of deferred financing costs			400		$ 400
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			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%
Maturity date			Dec. 06, 2026	Dec. 06, 2026
Amount outstanding			$ 167,900
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 2.75 [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 Greater 2.25 [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 Or Equal To 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			6.50%			6.50%	6.50%	6.50%	6.50%
Term Loan [Member] | Macquarie Capital [Member] | ABR [Member]
Debt Instrument [Line Items]
Interest rate			5.50%			5.50%	5.50%	5.50%	5.50%
UniCredit Loan [Member]
Debt Instrument [Line Items]
Amount outstanding			$ 1,517							$ 1,502
UniCredit Loan [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Line of credit facility | £												£ 2.0
Expiration date			Sep. 30, 2023	Sep. 30, 2023
Amount outstanding			$ 1,500				£ 1.1
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			5.0
Amount outstanding			$ 0
Line Of Credit With mBank [Member] | Casinos Poland [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Expiration date		Oct. 28, 2021
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 mBank [Member] | Casinos Poland [Member] | WIBOR [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Interest rate percentage points		2.40%
Line Of Credit With mBank [Member]
Debt Instrument [Line Items]
Term of credit agreement			2 years	2 years
Line Of Credit With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 2,500			10.0
Line of credit amount that can only be used to secure bank guarantees			$ 1,900	zł 7.5
Expiration date			Oct. 14, 2022	Oct. 14, 2022
Line of credit facility amount available for borrowing			$ 600			zł 2.5
Line Of Credit With mBank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate			2.10%			2.10%	2.10%	2.10%	2.10%
Line Of Credit With Alior Bank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points					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
Deposits maintained for payment of casino jackpots and gaming tax obligations			900			zł 3.6
Deposit for secured by land owned			300			zł 1.2
Revolving Credit Facility [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	10,000		10,000
Line of credit facility amount available for borrowing			$ 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%			4.25%	4.25%	4.25%	4.25%
Revolving Credit Facility [Member] | Macquarie Capital [Member] | LIBOR [Member] | Consolidated First Lien Net Leverage Ratio Less 2.75 [Member]
Debt Instrument [Line Items]
Interest rate			4.00%			4.00%	4.00%	4.00%	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%			3.25%	3.25%	3.25%	3.25%
Revolving Credit Facility [Member] | Macquarie Capital [Member] | ABR [Member] | Consolidated First Lien Net Leverage Ratio Less 2.75 [Member]
Debt Instrument [Line Items]
Interest rate			3.00%			3.00%	3.00%	3.00%	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] | Line Of Credit With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Line of credit facility secured amount | zł						zł 8.0
Required amount to maintain in cash inflows and financial covenants | zł				zł 5.0
Credit Agreement [Member] | Credit Agreements With Mbank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Number of credit agreements | item			5			5	5	5	5
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			$ 300			1.1
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			$ 400			1.5
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			$ 400			zł 1.4
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 | €											€ 7.0
Line of credit facility secured amount | €								€ 7.0
Amount outstanding			$ 7,400
Borrowing availability			$ 0
UniCredit Agreement [Member] | Century Resorts Management [Member] | Extended Maturity [Member]
Debt Instrument [Line Items]
Maturity date			Jun. 23, 2021	Jun. 23, 2021
UniCredit Agreement [Member] | Century Resorts Management [Member] | Interest Rate Reduction [Member]
Debt Instrument [Line Items]
Interest rate			1.90%			1.90%	1.90%	1.90%	1.90%
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 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			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 Than 2.50 But Less Than Or Equal To 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			2.50			2.50	2.50	2.50	2.50
Minimum [Member] | Term Loan [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25 But Less Than Or Equal To 2.50 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			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
Minimum [Member] | Credit Agreement [Member] | Line Of Credit With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Profit margin			0.40%	0.40%
Liquidity ratio			1.3			1.3	1.3	1.3	1.3
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
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
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
Minimum [Member] | Revolving Credit Facility - Financial Covenant [Member]
Debt Instrument [Line Items]
Line of credit facility			$ 3,500
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
Maximum [Member] | Term Loan [Member] | Macquarie Capital [Member] | Consolidated First Lien Net Leverage Ratio Greater 2.25 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			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 2.25 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			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 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio			2.75			2.75	2.75	2.75	2.75
Maximum [Member] | Credit Agreement [Member] | Line Of Credit With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Debt ratio			60			60	60	60	60
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
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]
Outstanding balance on financing obligation			$ 15,500						$ 19.5