XML 142 R120.htm IDEA: XBRL DOCUMENT v3.8.0.1
Balance Sheet Offsetting Balance Sheet Offsetting - Remaining Contractual Maturity of the Securities Sold Under Agreement to Repurchase (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Remaining Contractual Maturity of the Securities Sold Under Agreement to Repurchase [Line Items]    
Remaining contractual maturity of the agreements overnight and continuous $ 1,117,199 $ 963,317
Remaining contractual maturity of the agreements up to 30 Days 0 0
Remaining contractual maturity of the agreements 30 to 90 Days 0 0
Remaining contractual maturity of the agreements greater than 90 Days 0 0
Remaining contractual maturity of the agreements total 1,117,199 963,317
Securities Sold under Agreements to Repurchase, Gross 1,117,199 963,317
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities 0 0
US Treasury [Member]    
Remaining Contractual Maturity of the Securities Sold Under Agreement to Repurchase [Line Items]    
Remaining contractual maturity of the agreements overnight and continuous 1,036,891 841,475
Remaining contractual maturity of the agreements up to 30 Days 0 0
Remaining contractual maturity of the agreements 30 to 90 Days 0 0
Remaining contractual maturity of the agreements greater than 90 Days 0 0
Remaining contractual maturity of the agreements total 1,036,891 841,475
Residential Mortgage Backed Securities [Member]    
Remaining Contractual Maturity of the Securities Sold Under Agreement to Repurchase [Line Items]    
Remaining contractual maturity of the agreements overnight and continuous 80,308 121,842
Remaining contractual maturity of the agreements up to 30 Days 0 0
Remaining contractual maturity of the agreements 30 to 90 Days 0 0
Remaining contractual maturity of the agreements greater than 90 Days 0 0
Remaining contractual maturity of the agreements total $ 80,308 $ 121,842