Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale Securities Pledged as Collateral for Financing (Details)

v3.22.1
Available-for-Sale Securities Pledged as Collateral for Financing (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Available-for-sale securities, at fair value $ 6,970,718 $ 7,161,703
Asset Pledged as Collateral    
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Available-for-sale securities, at fair value $ 6,500,000 $ 7,000,000