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Investing Receivables (Tables)
12 Months Ended
Dec. 31, 2021
Receivables [Abstract]  
Schedule of Investing Receivables
Investing receivables consisted of the following (in thousands):
 
December 31,
20212020
Notes receivable from the City of Huntsville$77,784 $65,564 
Other investing loans receivable6,041 6,041 
Amortized cost basis83,825 71,605 
Allowance for credit losses(1,599)(2,851)
Investing receivables, net$82,226 $68,754