Long-Term Debt (Narrative) (Details) $ in Thousands, € in Millions, £ in Millions, zł in Millions, $ in Millions | Apr. 25, 2019 | Jun. 30, 2020USD ($)item | Mar. 31, 2020USD ($) | Jun. 30, 2020USD ($)item | Jun. 30, 2020PLN (zł)item | Jun. 30, 2019USD ($) | Jul. 30, 2020USD ($) | Jun. 30, 2020PLN (zł)item | Jun. 30, 2020GBP (£)item | Jun. 30, 2020EUR (€)item | Jun. 30, 2020CAD ($)item | Apr. 01, 2020 | Dec. 31, 2019USD ($) | Dec. 06, 2019USD ($) | Aug. 31, 2018EUR (€) | Aug. 31, 2017GBP (£) |
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. 1, 2023 | Jul. 1, 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. 6, 2026 | Dec. 6, 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 |
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 | | | | | | | | |
Line of credit facility amount available for borrowing | | | 1,300 | | 1,300 | | | | 5 | | | | | | | | |
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. 6, 2024 | Dec. 6, 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 | | | | | | | | |
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 | | | | | | | | |
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 | | | | | | | | | | | |
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 | | | | | | | | | | | |
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 | |
Line of credit facility secured amount | € | | | | | | | | | | | € 7 | | | | | | |
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 | | | | | |
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[1] | CRM assumed the UniCredit loan to CCB in February 2020. | |