Note 9 - Commitments and Contingencies (Details Textual) - USD ($)		1 Months Ended	12 Months Ended
	Dec. 20, 2011	Sep. 30, 2011	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Oct. 15, 2018
Accrued Liabilities, Current, Total			$ 438,896,000	$ 334,175,000
Business Combination Contingent Consideration Arrangements, Payment To Option Holder Percentage Of Ebitda	1.00%
Parking Fee Per Space			$ 80
Lessee, Operating Lease, Renewal Term			67 years
Development Agreement [Member]
Business Combination, Consideration Transferred, Total		$ 24,500,000
Project Development Preopening and Writedowns			$ 6,600,000
Development Agreement [Member] | Minimum [Member]
Unrecorded Commitment to Fund Pre Development Costs, Annual Amount			$ 1,000,000
Project, Construction Timeline			18 months
Development Agreement [Member] | Maximum [Member]
Unrecorded Commitment to Fund Pre Development Costs, Annual Amount			$ 2,000,000
Project, Construction Timeline			24 months
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			10 years
Diamond Jo Dubuque [Member]
Sponsor Fee Percentage			4.50%
Sponsor Fees			$ 3,200,000	3,100,000	$ 3,100,000
Diamond Jo Worth [Member]
Other Commitment Time Period			10 years
Sponsor Fee Percentage			5.76%
Sponsor Fees			$ 4,900,000	4,900,000	$ 5,000,000.0
Master Lease for Pinnacle Purchase Agreement [Member]
Lessee, Operating Lease, Renewal Term						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			15 years
Debt Issued By Counterparty			$ 19,700,000
Special Tax Assessment			1,600,000	1,700,000
Accrued Liabilities, Current, Total			6,700,000	7,400,000
Mulvane Special Tax Assessment for Utilities, Discount [Member] | Kansas Star [Member]
Accrued Liabilities, Current, Total			2,500,000	3,000,000.0
Additional Mulvane Special Tax Assessment for Utilities [Member] | Kansas Star [Member]
Debt Issued By Counterparty			5,000,000.0
Special Tax Assessment			1,700,000
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			13,100,000	13,400,000
Other Commitment, Discount on Obligation			$ 2,300,000	$ 2,500,000