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2I"}]}},"FederalFundsSold":{"label":"Federal 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Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, and (4) yield maintenance dollar repurchase agreements.","units":{"USD":[{"end":"2018-06-30","val":8314000,"accn":"0001193125-18-244442","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-08-09","frame":"CY2018Q2I"}]}},"FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch":{"label":"Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances","description":"Amount of advances from the Federal Home Loan Bank (FHLB).","units":{"USD":[{"end":"2013-12-31","val":23000000,"accn":"0001193125-15-087491","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-11","frame":"CY2013Q4I"},{"end":"2014-12-31","val":19000000,"accn":"0001193125-15-087491","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-11"},{"end":"2014-12-31","val":19000000,"accn":"0001193125-16-504895","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2014Q4I"},{"end":"2015-12-31","val":57000000,"accn":"0001193125-16-504895","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2015Q4I"}]}},"FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable":{"label":"Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available","description":"Amount of maximum advances or credit lines available from the Federal Home Loan Bank (FHLB).","units":{"USD":[{"end":"2014-12-31","val":38699000,"accn":"0001193125-15-087491","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-11","frame":"CY2014Q4I"},{"end":"2015-12-31","val":38503000,"accn":"0001193125-16-504895","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2015Q4I"},{"end":"2016-12-31","val":30001000,"accn":"0001193125-17-085173","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2016Q4I"},{"end":"2017-12-31","val":70004000,"accn":"0001193125-18-085133","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16","frame":"CY2017Q4I"},{"end":"2018-12-31","val":50100000,"accn":"0001564590-19-008368","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-19","frame":"CY2018Q4I"},{"end":"2019-12-31","val":633910000,"accn":"0001628280-20-003639","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-16","frame":"CY2019Q4I"}]}},"FederalHomeLoanBankAdvancesMaturitiesSummaryAfterRollingYearFive":{"label":"Federal Home Loan Bank, Advances, Maturities Summary, after Rolling Year Five","description":"Par amount of advances made and reported by Federal Home Loan Bank (FHLBank) maturing after the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0001193125-15-087491","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-11"},{"end":"2014-12-31","val":0,"accn":"0001193125-16-504895","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2014Q4I"},{"end":"2016-12-31","val":0,"accn":"0001193125-17-085173","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2016Q4I"},{"end":"2017-12-31","val":0,"accn":"0001193125-18-085133","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16","frame":"CY2017Q4I"},{"end":"2018-12-31","val":0,"accn":"0001564590-19-008368","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-19","frame":"CY2018Q4I"}]}},"FederalHomeLoanBankAdvancesMaturitiesSummaryInNextRollingTwelveMonths":{"label":"Federal Home Loan Bank, Advances, Maturities Summary, in Next Rolling Twelve Months","description":"Par amount of advances made and reported by Federal Home Loan Bank (FHLBank) maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2014-12-31","val":2000000,"accn":"0001193125-15-087491","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-11"},{"end":"2014-12-31","val":40000000,"accn":"0001193125-16-504895","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2014Q4I"},{"end":"2016-12-31","val":10000000,"accn":"0001193125-17-085173","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2016Q4I"},{"end":"2017-12-31","val":157000000,"accn":"0001193125-18-085133","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16","frame":"CY2017Q4I"},{"end":"2018-12-31","val":313500000,"accn":"0001564590-19-008368","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-19","frame":"CY2018Q4I"},{"end":"2019-12-31","val":155000000,"accn":"0001628280-20-003639","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-16","frame":"CY2019Q4I"}]}},"FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearFive":{"label":"Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Five","description":"Par amount of advances made and reported by Federal Home Loan Bank (FHLBank) maturing in the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2014-12-31","val":0,"accn":"0001193125-15-087491","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-11"},{"end":"2014-12-31","val":0,"accn":"0001193125-16-504895","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2014Q4I"},{"end":"2016-12-31","val":0,"accn":"0001193125-17-085173","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2016Q4I"},{"end":"2017-12-31","val":0,"accn":"0001193125-18-085133","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16","frame":"CY2017Q4I"}]}},"FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearFour":{"label":"Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Four","description":"Par amount of advances made and reported by Federal Home Loan Bank (FHLBank) maturing in the fourth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2014-12-31","val":7000000,"accn":"0001193125-15-087491","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-11"},{"end":"2014-12-31","val":0,"accn":"0001193125-16-504895","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2014Q4I"},{"end":"2016-12-31","val":0,"accn":"0001193125-17-085173","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2016Q4I"},{"end":"2017-12-31","val":0,"accn":"0001193125-18-085133","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16","frame":"CY2017Q4I"}]}},"FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearThree":{"label":"Federal Home Loan Bank, Advances, Maturities Summary, in Rolling Year Three","description":"Par amount of advances made and reported by Federal Home Loan Bank (FHLBank) maturing in the third rolling twelve months following the latest balance sheet. 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For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"pure":[{"end":"2014-12-31","val":0.007,"accn":"0001193125-15-087491","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-11"},{"end":"2014-12-31","val":0.0045,"accn":"0001193125-16-504895","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2014Q4I"},{"end":"2016-12-31","val":0.0127,"accn":"0001193125-17-085173","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2016Q4I"},{"end":"2017-12-31","val":0.0119,"accn":"0001193125-18-085133","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16","frame":"CY2017Q4I"},{"end":"2018-12-31","val":0.0224,"accn":"0001564590-19-008368","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-19","frame":"CY2018Q4I"},{"end":"2019-12-31","val":0.0241,"accn":"0001628280-20-003639","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-16","frame":"CY2019Q4I"}]}},"FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingInRollingYearFive":{"label":"Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing in Rolling Year Five","description":"Weighted average interest rate on advances made and reported by Federal Home Loan Bank (FHLBank) maturing in the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"pure":[{"end":"2014-12-31","val":0,"accn":"0001193125-15-087491","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-11"},{"end":"2014-12-31","val":0,"accn":"0001193125-16-504895","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2014Q4I"},{"end":"2016-12-31","val":0,"accn":"0001193125-17-085173","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2016Q4I"},{"end":"2017-12-31","val":0,"accn":"0001193125-18-085133","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16","frame":"CY2017Q4I"}]}},"FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingInRollingYearFour":{"label":"Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Maturing in Rolling Year Four","description":"Weighted average interest rate on advances made and reported by Federal Home Loan Bank (FHLBank) maturing in the fourth rolling twelve months following the latest balance sheet. 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