Long-Term Debt (Narrative) (Details) € in Millions, £ in Millions, zł in Millions, $ in Millions			1 Months Ended				3 Months Ended
	Apr. 22, 2022 PLN (zł)	Apr. 01, 2022 USD ($)	Mar. 31, 2023 USD ($) item	Feb. 28, 2023	Apr. 30, 2022 PLN (zł)	Dec. 31, 2019 USD ($)	Mar. 31, 2023 USD ($) item	Mar. 31, 2023 EUR (€) item	Mar. 31, 2022 USD ($)	Mar. 31, 2023 PLN (zł) item	Mar. 31, 2023 GBP (£) item	Mar. 31, 2023 EUR (€) item	Mar. 31, 2023 CAD ($) item	Dec. 31, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2021 EUR (€)	Mar. 31, 2020 USD ($)
Debt Instrument [Line Items]
Amortization of deferred financing costs							$ 674,000		$ 391,000
Amount outstanding			$ 365,175,000				365,175,000							$ 366,424,000
Principal payments							38,000		41,000
Outstanding financing obligation			576,000				576,000
Goldman Sachs Bank USA and BOFA Securities, Inc [Member] | SOFR [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.75 [Member]
Debt Instrument [Line Items]
Interest rate		5.25%
Macquarie Capital [Member]
Debt Instrument [Line Items]
Amortization of deferred financing costs									400,000
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			$ 200,000				$ 200,000			0.7
Century Downs Racetrack And Casino [Member]
Debt Instrument [Line Items]
Options to purchase land | item							4	4
First option date			Sep. 01, 2023	Jul. 01, 2023
Principal payments							$ 0
Term Loan [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member]
Debt Instrument [Line Items]
Percentage of the net cash proceeds of non-ordinary course asset sales or certain casualty events		100.00%
Percentage of annual excess cash flow		50.00%
Amount outstanding			$ 346,500,000				346,500,000
Term Loan [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25 But Less Than Or Equal To 2.75 [Member]
Debt Instrument [Line Items]
Percentage of annual excess cash flow		25.00%
Term Loan [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [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%
UniCredit Term Loans [Member]
Debt Instrument [Line Items]
Amount outstanding			4,265,000				4,265,000
BMO Credit Agreement [Member]
Debt Instrument [Line Items]
Repayment amount						$ 52,000,000.0
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			1,200,000				1,200,000			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							2.00%	2.00%
Line Of Credit With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł					zł 10.0
Line of credit available for cash borrowing removed | zł	zł 2.5
Guarantee From mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Bank guarantee issued for payment of casino jackpots and gaming tax obligations			(800,000)				$ (800,000)
Deposits maintained for payment of casino jackpots and gaming tax obligations			800,000				800,000			3.6
Deposit for secured by land owned			300,000				300,000			zł 1.2
Goldman Credit Agreement [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member]
Debt Instrument [Line Items]
Amortization of deferred financing costs							700,000
Goldman Credit Agreement [Member] | Term Loan [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 350,000,000.0
Maturity date		Apr. 01, 2029
Scheduled quarterly payments		$ 875,000
Percentage of quarterly payments equal to original principal		0.25%
Goldman Credit Agreement [Member] | Term Loan [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member] | SOFR [Member]
Debt Instrument [Line Items]
Interest rate		6.00%
Goldman Credit Agreement [Member] | Term Loan [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member] | ABR [Member]
Debt Instrument [Line Items]
Interest rate		5.00%
Revolving Credit Facility [Member] | SOFR [Member] | Consolidated First Lien Net Leverage Ratio Less Than Or Equal To 2.25 [Member]
Debt Instrument [Line Items]
Interest rate		4.75%
Revolving Credit Facility [Member] | ABR [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.75 [Member]
Debt Instrument [Line Items]
Interest rate		4.25%
Revolving Credit Facility [Member] | ABR [Member] | Consolidated First Lien Net Leverage Ratio Less Than Or Equal To 2.25 [Member]
Debt Instrument [Line Items]
Interest rate		3.75%
Revolving Credit Facility [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 30,000,000.0
Line of credit facility amount available for borrowing			$ 30,000,000.0				$ 30,000,000.0
Consolidated First Lien Net Leverage Ratio		2.75
Fronting fee percentage		0.125%
Maturity date		Apr. 01, 2027
Revolving Credit Facility [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member] | SOFR [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25 But Less Than Or Equal To 2.75 [Member]
Debt Instrument [Line Items]
Interest rate		5.00%
Revolving Credit Facility [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member] | ABR [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25 But Less Than Or Equal To 2.75 [Member]
Debt Instrument [Line Items]
Interest rate		4.00%
Revolving Credit Facility [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity						10,000,000.0
Line Of Credit [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity															$ 7,400,000
Letter Of Credit [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity						5,000,000.0
Credit Agreement [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity						180,000,000.0
Repayment amount		$ 166,200,000
Credit Agreement [Member] | Term Loan [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 170,000,000.0
Credit Agreement [Member] | UniCredit Term Loans [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Number of credit agreements | item			2				2			2	2	2	2
First Credit Agreement [Member] | UniCredit Term Loans [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Line of credit facility | £											£ 2.0
Expiration date							Sep. 30, 2023	Sep. 30, 2023
Line of credit facility amount available for borrowing			$ 0				$ 0
Amount outstanding			$ 300,000				$ 300,000
Debt Instrument, Covenant Compliance							no financial covenants	no financial covenants
First Credit Agreement [Member] | UniCredit Term Loans [Member] | Century Resorts Management [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points							1.625%	1.625%
Second Credit Agreement [Member] | UniCredit Term Loans [Member] | Century Resorts Management [Member]
Debt Instrument [Line Items]
Interest rate			2.875%				2.875%			2.875%	2.875%	2.875%	2.875%
Term loan | €																€ 6.0
Line of credit facility																	$ 7,400,000
Line of credit facility amount available for borrowing			$ 0				$ 0
Guaranteed amount | €								€ 6.0
Maturity date							Dec. 31, 2025	Dec. 31, 2025
Amount outstanding			4,000,000.0				$ 4,000,000.0					€ 3.7
Debt Instrument, Covenant Compliance							no financial covenants	no financial covenants
Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity | zł										zł 2.5
Third Credit Agreement [Member] | Term Loan With mBank [Member] | Casinos Poland [Member] | WIBOR [Member]
Debt Instrument [Line Items]
Interest rate percentage points					1.90%
Minimum [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25 But Less Than Or Equal To 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio		2.25
Minimum [Member] | Term Loan [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25 But Less Than Or Equal To 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio		2.25
Minimum [Member] | Guarantee From mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Terminate date							2024-06	2024-06
Minimum [Member] | Revolving Credit Facility [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member]
Debt Instrument [Line Items]
Percentage of principal amount of unused commitments		0.375%
Maximum [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25 But Less Than Or Equal To 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio		2.75
Maximum [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [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
Maximum [Member] | Term Loan [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member] | Consolidated First Lien Net Leverage Ratio Greater Than 2.25 But Less Than Or Equal To 2.75 [Member]
Debt Instrument [Line Items]
Consolidated First Lien Net Leverage Ratio		2.75
Maximum [Member] | Term Loan [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [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
Maximum [Member] | Guarantee From mBank [Member] | Casinos Poland [Member]
Debt Instrument [Line Items]
Terminate date							2026-01	2026-01
Maximum [Member] | Goldman Credit Agreement [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member]
Debt Instrument [Line Items]
Customary agency fees							$ 100,000
Maximum [Member] | Revolving Credit Facility [Member] | Goldman Sachs Bank USA and BOFA Securities, Inc [Member]
Debt Instrument [Line Items]
Percentage of principal amount of unused commitments		0.50%
Maximum [Member] | Revolving Credit Facility [Member] | Macquarie Capital [Member]
Debt Instrument [Line Items]
Commitment fees									$ 100,000
Maximum [Member] | Letter Of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 10,000,000.0
Century Downs Racetrack And Casino [Member]
Debt Instrument [Line Items]
Outstanding balance on financing obligation			$ 14,400,000				$ 14,400,000						$ 19.5