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Commitments and Contingencies (Details) - USD ($)
3 Months Ended 9 Months Ended
May 05, 2021
Apr. 12, 2021
Jul. 01, 2018
Sep. 30, 2021
Sep. 30, 2021
Line of Credit Facility, Current Borrowing Capacity       $ 500,000 $ 500,000
Treasury Shares, Authorization [Line Items]   On April 12, 2021, the Company and the Foundation received the last of the regulatory approvals required for the Foundation to divest control of the Company and thus all of the Foundation’s Class B Shares were transferred to the Company as of such date.      
Novation Date     Jul. 01, 2018    
Line of Credit Facility [Line Items]          
Line of Credit Facility, Expiration Date         May 05, 2024
Line of Credit Facility, Initiation Date May 05, 2021        
Line of credit facility term 3 years        
Line of Credit Facility, Current Borrowing Capacity       $ 500,000 $ 500,000
Fed Funds Effective Rate Overnight Index Swap Rate          
Line of Credit Facility [Line Items]          
Debt Instrument, Basis Spread on Variable Rate         0.50%
London Interbank Offered Rate (LIBOR) Swap Rate          
Line of Credit Facility [Line Items]          
Debt Instrument, Basis Spread on Variable Rate         1.00%
London Interbank Offered Rate (LIBOR)          
Line of Credit Facility [Line Items]          
Debt Instrument, Basis Spread on Variable Rate         0.75%
Common Stock Class B [Member]          
Payments for Repurchase of Common Stock         $ 9,100,000
Revolving Credit Facility          
Line of Credit Facility [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity $ 20,000,000        
Debt Instrument, Interest Rate, Stated Percentage       0.75% 0.75%
Line of Credit Facility, Commitment Fee Percentage       0.375%  
Line of Credit, Current       $ 0 $ 0
Base Rate          
Line of Credit Facility [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage 1.75%        
London Interbank Offered Rate (LIBOR)          
Line of Credit Facility [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage 2.75%        
Unfunded Loan Commitment          
Financing Receivable, Loan in Process       $ 63,000,000 $ 63,000,000