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Note 9 - Commitments and Contingencies (Details Textual) - USD ($)		1 Months Ended		12 Months Ended
	Dec. 20, 2011	Jul. 31, 2012	Sep. 30, 2011	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	May 06, 2020	Oct. 15, 2018	Jan. 11, 2011
Accrued Liabilities, Current, Total				$ 396,419,000	$ 438,896,000
Business Combination Contingent Consideration Arrangements, Payment To Option Holder Percentage Of Ebitda	1.00%
Parking Fee Per Space				$ 80
Lessee, Operating Lease, Renewal Term (Year)				65 years
Gold Merger Sub [Member] | Promissory Note [Member]
Notes Payable, Total							$ 57,700,000
Development Agreement [Member]
Business Combination, Consideration Transferred, Total			$ 24,500,000
Project Development Preopening and Writedowns		$ 5,500,000
Development Agreement [Member] | Minimum [Member]
Unrecorded Commitment to Fund Pre Development Costs, Annual Amount		1,000,000
Development Agreement [Member] | Maximum [Member]
Unrecorded Commitment to Fund Pre Development Costs, Annual Amount		$ 2,000,000
Kansas Star [Member]
Business Combination Contingent Consideration Arrangements, Payment To Option Holder Percentage Of Ebitda				1.00%
Business Combination, Contingent Consideration, Arrangements Payment to Option Holder Term (Year)	10 years
Diamond Jo Dubuque [Member]
Sponsor Fee Percentage				4.50%
Sponsor Fees				$ 2,300,000	$ 3,200,000	$ 3,100,000
Diamond Jo Worth [Member]
Other Commitment Time Period (Year)					10 years
Sponsor Fee Percentage				5.76%
Sponsor Fees				$ 3,800,000	$ 4,900,000	$ 4,900,000
Master Lease for Pinnacle Purchase Agreement [Member]
Lessee, Operating Lease, Renewal Term (Year)								5 years
Annual Donations for Education in Operating Area [Member] | Kansas Star [Member]
Other Commitment, Total									$ 1,500,000
Mulvane Special Tax Assessment for Utilities [Member] | Kansas Star [Member]
Other Commitment Time Period (Year)				15 years
Debt Issued By Counterparty				$ 19,700,000
Special Tax Assessment				1,600,000	1,600,000
Accrued Liabilities, Current, Total				5,900,000	6,700,000
Mulvane Special Tax Assessment for Utilities, Discount [Member] | Kansas Star [Member]
Accrued Liabilities, Current, Total				2,000,000.0	2,500,000
Additional Mulvane Special Tax Assessment for Utilities [Member] | Kansas Star [Member]
Debt Issued By Counterparty				5,000,000.0
Special Tax Assessment				1,600,000
Dubuque Minimum Assessment Agreement [Member] | Diamond Jo Dubuque [Member]
Property Taxes Minimum Agreed Taxable Value				57,900,000
Other Commitment, Minimum Annual Payments				1,900,000	1,900,000
Dubuque Minimum Assessment Agreement [Member] | Diamond Jo Dubuque [Member] | Other Liabilities [Member]
Other Commitment Obligation				12,700,000	13,100,000
Other Commitment, Discount on Obligation				$ 2,200,000	$ 2,300,000

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- Definition

Percentage of EBITDA to be paid to option holder as part of a business combination contingent consideration agreement.

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The amount of debt issued by a counterparty.

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- Definition

The amount of other commitment discount on obligation.

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- Definition

The minimum annual payments of a commitment.

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- Definition

The cost of parking per space.

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- Definition

The amount of project development preopening and writedowns.

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- Definition

The minimum agreed taxable value of property taxes.

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- Definition

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- Definition

The sponsor fee percentage.

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- Definition

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

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- Definition

Fees paid to advisors who provide certain management support and administrative oversight services including the organization and sale of stock, investment funds, limited partnerships and mutual funds.

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