Quarterly report pursuant to Section 13 or 15(d)

Recently Issued Accounting Pronouncements (Narrative) (Details)

v3.21.1
Recently Issued Accounting Pronouncements (Narrative) (Details) - USD ($)
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
May 10, 2021
Apr. 05, 2021
Dec. 31, 2020
Sep. 30, 2020
Business Acquisition [Line Items]            
Other assets $ 39,503,000       $ 41,282,000  
Revenues 146,415,000 $ 156,297,000        
Property and equipment, net 90,257,000       90,049,000  
Junior subordinated debentures 134,391,000       138,177,000  
Cash and cash equivalents 199,150,000 $ 379,844,000     221,118,000  
Prepaid expenses $ 25,990,000       $ 9,367,000  
Class A Common Stock [Member]            
Business Acquisition [Line Items]            
Common stock, shares authorized 30,000,000       30,000,000  
Class B Common Stock [Member]            
Business Acquisition [Line Items]            
Common stock, shares authorized 4,000,000       4,000,000  
Spin-off [Member]            
Business Acquisition [Line Items]            
Debt instrument, face amount $ 75,000,000.0         $ 75,000,000.0
Interest rate           6.00%
Deferred interest rate           8.00%
Debt instrument term 5 years          
Accounting Standards Update 2020-04 [Member] | LIBOR Indexed Junior Subordinated Debentures [Member]            
Business Acquisition [Line Items]            
Junior subordinated debentures $ 171,100,000          
Accounting Standards Update 2020-04 [Member] | LIBOR Indexed Receivable-backed Notes Payable And Lines Of Credit [Member]            
Business Acquisition [Line Items]            
Receivable-backed notes payable and lines of credit 66,700,000          
Accounting Standards Update 2020-04 [Member] | LIBOR Line Of Credit And Notes Payable [Member]            
Business Acquisition [Line Items]            
Notes And Loans Payable $ 108,100,000          
Subsequent Event [Member] | Bluegreen [Member]            
Business Acquisition [Line Items]            
Consolidated method ownership percentage     93.00% 7.00%