Quarterly report pursuant to Section 13 or 15(d)

Schedule of Repurchase Agreements by Term, Short or Long (Details)

v3.19.1
Schedule of Repurchase Agreements by Term, Short or Long (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Assets Sold under Agreements to Repurchase [Line Items]    
Repurchase agreements $ 19,729,691 $ 23,133,476
Maturity up to One Year [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Repurchase agreements 19,429,691 22,833,476
Maturity Over One Year [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Repurchase agreements $ 300,000 $ 300,000