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Securities Sold Under Agreements to Repurchase - Schedule of Remaining Contractual Maturity of Secured Borrowings and Class of Collateral Pledged Under Repurchase Agreements (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Assets Sold under Agreements to Repurchase [Line Items]    
Securities sold under agreements to repurchase $ 392,275 $ 431,166
U.S. Treasury    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities sold under agreements to repurchase 392,275  
Overnight and Continuous    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities sold under agreements to repurchase 392,275  
Overnight and Continuous | U.S. Treasury    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities sold under agreements to repurchase 392,275  
Up to 30 Days    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities sold under agreements to repurchase 0  
Up to 30 Days | U.S. Treasury    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities sold under agreements to repurchase 0  
30-90 Days    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities sold under agreements to repurchase 0  
30-90 Days | U.S. Treasury    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities sold under agreements to repurchase 0  
Greater Than 90 days    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities sold under agreements to repurchase 0  
Greater Than 90 days | U.S. Treasury    
Assets Sold under Agreements to Repurchase [Line Items]    
Securities sold under agreements to repurchase $ 0