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Investment Securities - Credit Valuation Allowance for Available For Sale Debt Securities (Details) - Asset-backed securities
$ in Thousands
3 Months Ended
Mar. 31, 2022
USD ($)
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]  
Balance at January 1, $ 0
Credit losses on securities for which credit losses were not previously recorded 728
Balance at March 31, $ 728