XML 94 R78.htm IDEA: XBRL DOCUMENT v3.22.1
Debt Securities Available for Sale - Debt securities available- for-sale - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Debt Securities, Available-for-sale      
Proceeds from sale of debt securities available-for-sale $ 0 $ 0  
Gross unrealized losses $ 1,336,220,000   $ 298,348,000