XML 54 R44.htm IDEA: XBRL DOCUMENT v3.21.1
Investment in and Advances to Unconsolidated Affiliates - Additional Information (Details)
3 Months Ended
Mar. 31, 2021
USD ($)
joint_venture
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Investments in and Advances to Affiliates [Line Items]      
Number Of Immaterial Joint Ventures | joint_venture 2    
Distributions from unconsolidated affiliates $ 22,000,000.0 $ 1,300,000  
Rivers Des Plaines      
Investments in and Advances to Affiliates [Line Items]      
Equity method investment, ownership percentage 61.30%   61.30%
Equity method investment, difference between carrying amount and underlying equity $ 833,100,000    
Distributions from unconsolidated affiliates 12,000,000.0 1,300,000  
Equity method investment, amount $ 523,100,000   $ 519,000,000.0
Miami Valley Gaming LLC      
Investments in and Advances to Affiliates [Line Items]      
Equity method investment, ownership percentage 50.00%   50.00%
Distributions from unconsolidated affiliates $ 10,000,000.0 $ 0  
Equity method investment, amount $ 109,300,000   $ 110,700,000
High Plaines | Rivers Des Plaines      
Investments in and Advances to Affiliates [Line Items]      
Equity method investment, ownership percentage 36.00%    
Casino Investors | Rivers Des Plaines      
Investments in and Advances to Affiliates [Line Items]      
Equity method investment, ownership percentage 2.70%    
Delaware North Companies Gaming & Entertainment Inc. | Miami Valley Gaming LLC      
Investments in and Advances to Affiliates [Line Items]      
Equity method investment, ownership percentage 50.00%