XML 56 R45.htm IDEA: XBRL DOCUMENT v3.10.0.1
Borrowings under Repurchase Agreements Schedule of Repurchase Agreements by Maturity (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Repurchase Agreements [Line Items]    
Repurchase agreements [1] $ 1,500,632 $ 1,597,206
Debt, Weighted Average Interest Rate 2.27% 1.47%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements 49 days 43 days
Maturity up to 30 days [Member]    
Repurchase Agreements [Line Items]    
Repurchase agreements $ 346,841 $ 410,628
Debt, Weighted Average Interest Rate 2.21% 1.41%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements 15 days 15 days
Maturity 31 to 60 days [Member]    
Repurchase Agreements [Line Items]    
Repurchase agreements $ 721,514 $ 906,602
Debt, Weighted Average Interest Rate 2.25% 1.46%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements 45 days 46 days
Maturity 61 to 90 days [Member]    
Repurchase Agreements [Line Items]    
Repurchase agreements $ 342,650 $ 273,665
Debt, Weighted Average Interest Rate 2.36% 1.60%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements 77 days 74 days
Maturity 91 to 120 days [Member]    
Repurchase Agreements [Line Items]    
Repurchase agreements $ 89,627 $ 6,311
Debt, Weighted Average Interest Rate 2.30% 1.61%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements 108 days 120 days
[1] In the Company's Consolidated Balance Sheet, all balances associated with the repurchase agreements and financial derivatives are presented on a gross basis.