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Investment Securities (Tables)
9 Months Ended
Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of Securities Available for Sale
The amortized costs, gross unrealized gains and losses, and estimated fair values of securities available for sale at September 30, 2021 are summarized as follows:
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Investment securities available for sale:
Asset-backed securities
$7,630 $— $(24)$7,606 
Mortgage-backed securities:
U.S. Government-sponsored enterprises
5,083 — (44)5,039 
Collateralized mortgage obligations:
U.S. Government-sponsored enterprises
20,096 — (206)19,890 
Total investment securities available for sale
$32,809 $— $(274)$32,535