SUBSEQUENT EVENTS - Narrative (Details) - USD ($) $ in Millions	Nov. 01, 2021	Oct. 01, 2021	Jun. 22, 2021	Dec. 10, 2020
Series B Cumulative Preferred Stock
Subsequent Event [Line Items]
Dividend rate on preferred stock			8.25%	8.25%
Subsequent Event | Twin Peaks
Subsequent Event [Line Items]
Purchase price of business		$ 300.0
Cash payment to acquire business		222.1
Note payable to acquire business		$ 10.4
Equity consideration transferred (in shares)		2,847,393
Equity interests transferred		$ 67.5
Initial put/call share agreement		42.5
Secondary put/call share agreement		$ 25.0
Subsequent Event | Fazoli's
Subsequent Event [Line Items]
Cash payment to acquire business	$ 130.0
Subsequent Event | Series B Cumulative Preferred Stock | Underwritten offering
Subsequent Event [Line Items]
Number of shares issued (in shares)	1,000,000
Dividend rate on preferred stock	8.25%
Net proceeds on sale of stock	$ 16.5
Payments of stock issuance costs	$ 1.5
Subsequent Event | Series B Cumulative Preferred Stock | Twin Peaks
Subsequent Event [Line Items]
Interest rate on unpaid cash proceeds related to acquisition		10.00%
Subsequent Event | Series B Cumulative Preferred Stock, Initial Put/Call Shares | Twin Peaks
Subsequent Event [Line Items]
Number of purchase shares		1,793,858
Subsequent Event | Series B Cumulative Preferred Stock, Secondary Put/Call Shares | Twin Peaks
Subsequent Event [Line Items]
Number of purchase shares		1,053,535