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Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2017-12-31","val":6536192,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20"},{"end":"2017-12-31","val":6536192,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2017Q4I"},{"end":"2018-06-30","val":7978784,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20","frame":"CY2018Q2I"},{"end":"2018-09-30","val":8367444,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2018Q3I"},{"end":"2018-12-31","val":7955276,"accn":"0001193125-19-088111","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-27"},{"end":"2018-12-31","val":7955276,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2018Q4I"},{"end":"2019-03-31","val":7881484,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2019Q1I"},{"end":"2019-06-30","val":6277400,"accn":"0001193125-19-220884","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2019Q2I"},{"end":"2019-09-30","val":5493053,"accn":"0001193125-19-292003","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2019Q3I"},{"end":"2019-12-31","val":6555056,"accn":"0001193125-20-087938","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-27","frame":"CY2019Q4I"},{"end":"2020-03-31","val":6865933,"accn":"0001193125-20-143561","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-15","frame":"CY2020Q1I"},{"end":"2020-06-30","val":5588815,"accn":"0001564590-20-039874","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-13","frame":"CY2020Q2I"},{"end":"2020-09-30","val":5126594,"accn":"0001564590-20-053375","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-12","frame":"CY2020Q3I"},{"end":"2020-12-31","val":3802984,"accn":"0001193125-21-095914","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-26","frame":"CY2020Q4I"},{"end":"2021-03-31","val":2067990,"accn":"0001193125-21-160053","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-13","frame":"CY2021Q1I"},{"end":"2021-06-30","val":1909034,"accn":"0001193125-21-245671","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-13","frame":"CY2021Q2I"}]}},"TimeDepositMaturitiesYearFour":{"label":"Time Deposit Maturities, Year Four","description":"Amount of time deposit maturing in fourth fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2017-12-31","val":7574830,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20"},{"end":"2017-12-31","val":7574830,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2017Q4I"},{"end":"2018-06-30","val":7643894,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20","frame":"CY2018Q2I"},{"end":"2018-09-30","val":7101711,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2018Q3I"},{"end":"2018-12-31","val":7659227,"accn":"0001193125-19-088111","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-27"},{"end":"2018-12-31","val":7659227,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2018Q4I"},{"end":"2019-03-31","val":7235027,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2019Q1I"},{"end":"2019-06-30","val":8067141,"accn":"0001193125-19-220884","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2019Q2I"},{"end":"2019-09-30","val":9154119,"accn":"0001193125-19-292003","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2019Q3I"},{"end":"2019-12-31","val":8924905,"accn":"0001193125-20-087938","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-27","frame":"CY2019Q4I"},{"end":"2020-03-31","val":8959675,"accn":"0001193125-20-143561","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-15","frame":"CY2020Q1I"},{"end":"2020-06-30","val":8357266,"accn":"0001564590-20-039874","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-13","frame":"CY2020Q2I"},{"end":"2020-09-30","val":7150190,"accn":"0001564590-20-053375","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-12","frame":"CY2020Q3I"},{"end":"2020-12-31","val":7928988,"accn":"0001193125-21-095914","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-26","frame":"CY2020Q4I"},{"end":"2021-03-31","val":9643818,"accn":"0001193125-21-160053","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-13","frame":"CY2021Q1I"},{"end":"2021-06-30","val":8245579,"accn":"0001193125-21-245671","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-13","frame":"CY2021Q2I"}]}},"TimeDepositMaturitiesYearOne":{"label":"Time Deposit Maturities, Year One","description":"Amount of time deposit maturing in next fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2017-12-31","val":29502622,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20"},{"end":"2017-12-31","val":29502622,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2017Q4I"},{"end":"2018-06-30","val":29724972,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20","frame":"CY2018Q2I"},{"end":"2018-09-30","val":31354483,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2018Q3I"},{"end":"2018-12-31","val":31554160,"accn":"0001193125-19-088111","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-27"},{"end":"2018-12-31","val":31554160,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2018Q4I"},{"end":"2019-03-31","val":29874690,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2019Q1I"},{"end":"2019-06-30","val":29875663,"accn":"0001193125-19-220884","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2019Q2I"},{"end":"2019-09-30","val":28175940,"accn":"0001193125-19-292003","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2019Q3I"},{"end":"2019-12-31","val":27378762,"accn":"0001193125-20-087938","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-27","frame":"CY2019Q4I"},{"end":"2020-03-31","val":29264377,"accn":"0001193125-20-143561","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-15","frame":"CY2020Q1I"},{"end":"2020-06-30","val":30740008,"accn":"0001564590-20-039874","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-13","frame":"CY2020Q2I"},{"end":"2020-09-30","val":36677340,"accn":"0001564590-20-053375","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-12","frame":"CY2020Q3I"},{"end":"2020-12-31","val":35747543,"accn":"0001193125-21-095914","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-26","frame":"CY2020Q4I"},{"end":"2021-03-31","val":34726319,"accn":"0001193125-21-160053","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-13","frame":"CY2021Q1I"},{"end":"2021-06-30","val":36869341,"accn":"0001193125-21-245671","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-13","frame":"CY2021Q2I"}]}},"TimeDepositMaturitiesYearThree":{"label":"Time Deposit Maturities, Year Three","description":"Amount of time deposit maturing in third fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2017-12-31","val":10756925,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20"},{"end":"2017-12-31","val":10756925,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2017Q4I"},{"end":"2018-06-30","val":11847104,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20","frame":"CY2018Q2I"},{"end":"2018-09-30","val":14008759,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2018Q3I"},{"end":"2018-12-31","val":12350296,"accn":"0001193125-19-088111","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-27"},{"end":"2018-12-31","val":12350296,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2018Q4I"},{"end":"2019-03-31","val":13063739,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2019Q1I"},{"end":"2019-06-30","val":14524576,"accn":"0001193125-19-220884","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2019Q2I"},{"end":"2019-09-30","val":11996295,"accn":"0001193125-19-292003","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2019Q3I"},{"end":"2019-12-31","val":14240137,"accn":"0001193125-20-087938","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-27","frame":"CY2019Q4I"},{"end":"2020-03-31","val":14368762,"accn":"0001193125-20-143561","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-15","frame":"CY2020Q1I"},{"end":"2020-06-30","val":12508697,"accn":"0001564590-20-039874","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-13","frame":"CY2020Q2I"},{"end":"2020-09-30","val":12531165,"accn":"0001564590-20-053375","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-12","frame":"CY2020Q3I"},{"end":"2020-12-31","val":13318627,"accn":"0001193125-21-095914","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-26","frame":"CY2020Q4I"},{"end":"2021-03-31","val":13245039,"accn":"0001193125-21-160053","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-13","frame":"CY2021Q1I"},{"end":"2021-06-30","val":12841703,"accn":"0001193125-21-245671","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-13","frame":"CY2021Q2I"}]}},"TimeDepositMaturitiesYearTwo":{"label":"Time Deposit Maturities, Year Two","description":"Amount of time deposit maturing in second fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2017-12-31","val":20665546,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20"},{"end":"2017-12-31","val":20665546,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2017Q4I"},{"end":"2018-06-30","val":19105742,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20","frame":"CY2018Q2I"},{"end":"2018-09-30","val":16108011,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2018Q3I"},{"end":"2018-12-31","val":16108384,"accn":"0001193125-19-088111","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-27"},{"end":"2018-12-31","val":16108384,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2018Q4I"},{"end":"2019-03-31","val":17448908,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2019Q1I"},{"end":"2019-06-30","val":18325009,"accn":"0001193125-19-220884","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2019Q2I"},{"end":"2019-09-30","val":23389328,"accn":"0001193125-19-292003","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2019Q3I"},{"end":"2019-12-31","val":21243979,"accn":"0001193125-20-087938","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-27","frame":"CY2019Q4I"},{"end":"2020-03-31","val":19178981,"accn":"0001193125-20-143561","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-15","frame":"CY2020Q1I"},{"end":"2020-06-30","val":20899143,"accn":"0001564590-20-039874","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-13","frame":"CY2020Q2I"},{"end":"2020-09-30","val":17436787,"accn":"0001564590-20-053375","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-12","frame":"CY2020Q3I"},{"end":"2020-12-31","val":18036154,"accn":"0001193125-21-095914","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-26","frame":"CY2020Q4I"},{"end":"2021-03-31","val":18934675,"accn":"0001193125-21-160053","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-13","frame":"CY2021Q1I"},{"end":"2021-06-30","val":18338794,"accn":"0001193125-21-245671","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-13","frame":"CY2021Q2I"}]}},"TimeDeposits":{"label":"Time Deposits","description":"Amount of time deposit liabilities, including certificates of deposit.","units":{"USD":[{"end":"2017-12-31","val":75036115,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20"},{"end":"2017-12-31","val":75036115,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2017Q4I"},{"end":"2018-06-30","val":76300496,"accn":"0001193125-18-278404","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-09-20","frame":"CY2018Q2I"},{"end":"2018-09-30","val":76940408,"accn":"0001193125-18-326495","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-11-14","frame":"CY2018Q3I"},{"end":"2018-12-31","val":75627343,"accn":"0001193125-19-088111","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-27"},{"end":"2018-12-31","val":75627343,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2018Q4I"},{"end":"2019-03-31","val":75503848,"accn":"0001193125-19-147641","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-15","frame":"CY2019Q1I"},{"end":"2019-06-30","val":77069789,"accn":"0001193125-19-220884","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-14","frame":"CY2019Q2I"},{"end":"2019-09-30","val":78208735,"accn":"0001193125-19-292003","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-14","frame":"CY2019Q3I"},{"end":"2019-12-31","val":78342839,"accn":"0001193125-20-087938","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-27","frame":"CY2019Q4I"},{"end":"2020-03-31","val":78637728,"accn":"0001193125-20-143561","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-15","frame":"CY2020Q1I"},{"end":"2020-06-30","val":78093929,"accn":"0001564590-20-039874","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-13","frame":"CY2020Q2I"},{"end":"2020-09-30","val":78922076,"accn":"0001564590-20-053375","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-12","frame":"CY2020Q3I"},{"end":"2020-12-31","val":78834296,"accn":"0001193125-21-095914","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-26","frame":"CY2020Q4I"},{"end":"2021-03-31","val":78617841,"accn":"0001193125-21-160053","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-13","frame":"CY2021Q1I"},{"end":"2021-06-30","val":78204451,"accn":"0001193125-21-245671","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-13","frame":"CY2021Q2I"}]}},"TimeDepositsAtCarryingValue":{"label":"Time Deposits, at Carrying Value","description":"Any certificate of deposit or savings account held by a bank or other financial institution for a short-term specified period of time. Because of their short-term, time deposits are considered highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three 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