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Borrowings and Related Interest (Schedule of Repurchase Agreement by Maturity) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]  
Assets sold under agreements to repurchase $ 190,000
Less Than 90 Days [Member]  
Debt Instrument [Line Items]  
Assets sold under agreements to repurchase 140,000
Over 90-days [Member]  
Debt Instrument [Line Items]  
Assets sold under agreements to repurchase $ 50,000