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This item includes treasury stock repurchased by the entity. 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This element is used when state law does not recognize treasury stock.","units":{"USD":[{"start":"2013-10-01","end":"2014-06-30","val":1587000,"accn":"0001553326-14-000047","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-08-06"},{"start":"2013-10-01","end":"2014-06-30","val":-1587000,"accn":"0001553326-15-000044","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-07-31"},{"start":"2013-10-01","end":"2014-09-30","val":4120000,"accn":"0001553326-14-000056","fy":2014,"fp":"FY","form":"10-K","filed":"2014-12-09"},{"start":"2013-10-01","end":"2014-09-30","val":4120000,"accn":"0001553326-15-000053","fy":2015,"fp":"FY","form":"10-K","filed":"2015-12-10","frame":"CY2014"},{"start":"2014-10-01","end":"2014-12-31","val":833000,"accn":"0001553326-15-000008","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-01-30"},{"start":"2014-10-01","end":"2014-12-31","val":833000,"accn":"0001553326-16-000066","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-01-29","frame":"CY2014Q4"},{"start":"2014-10-01","end":"2015-03-31","val":9369000,"accn":"0001553326-15-000023","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-04-30"},{"start":"2014-10-01","end":"2015-03-31","val":9369000,"accn":"0001553326-16-000086","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-05-03"},{"start":"2014-10-01","end":"2015-06-30","val":11379000,"accn":"0001553326-15-000044","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-07-31"},{"start":"2014-10-01","end":"2015-06-30","val":11379000,"accn":"0001553326-16-000100","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-07-29"},{"start":"2014-10-01","end":"2015-09-30","val":-12784000,"accn":"0001553326-15-000053","fy":2015,"fp":"FY","form":"10-K","filed":"2015-12-10"},{"start":"2014-10-01","end":"2015-09-30","val":12784000,"accn":"0001553326-16-000106","fy":2016,"fp":"FY","form":"10-K","filed":"2016-12-02","frame":"CY2015"},{"start":"2015-10-01","end":"2015-12-31","val":506000,"accn":"0001553326-16-000066","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-01-29"},{"start":"2015-10-01","end":"2015-12-31","val":506000,"accn":"0001553326-17-000008","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-01-24","frame":"CY2015Q4"},{"start":"2015-10-01","end":"2016-03-31","val":3242000,"accn":"0001553326-16-000086","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-05-03"},{"start":"2015-10-01","end":"2016-03-31","val":3242000,"accn":"0001553326-17-000020","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-04-28"},{"start":"2015-10-01","end":"2016-06-30","val":4342000,"accn":"0001553326-16-000100","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-07-29"},{"start":"2015-10-01","end":"2016-06-30","val":4342000,"accn":"0001553326-17-000032","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-07-27"},{"start":"2015-10-01","end":"2016-09-30","val":4542000,"accn":"0001553326-16-000106","fy":2016,"fp":"FY","form":"10-K","filed":"2016-12-02"},{"start":"2015-10-01","end":"2016-09-30","val":4542000,"accn":"0001553326-17-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2017-12-05","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":618000,"accn":"0001553326-17-000008","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-01-24","frame":"CY2016Q4"},{"start":"2016-10-01","end":"2017-03-31","val":1409000,"accn":"0001553326-17-000020","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-04-28"},{"start":"2016-10-01","end":"2017-06-30","val":2362000,"accn":"0001553326-17-000032","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-07-27"},{"start":"2016-10-01","end":"2017-09-30","val":2706000,"accn":"0001553326-17-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2017-12-05","frame":"CY2017"}]}},"TimeDepositMaturitiesYearFive":{"label":"Time Deposit Maturities, Year Five","description":"Amount of time deposit maturing in fifth 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":"2013-09-30","val":3472000,"accn":"0001553326-13-000005","fy":2013,"fp":"FY","form":"10-K","filed":"2013-12-24","frame":"CY2013Q3I"},{"end":"2014-09-30","val":10472000,"accn":"0001553326-14-000056","fy":2014,"fp":"FY","form":"10-K","filed":"2014-12-09","frame":"CY2014Q3I"},{"end":"2015-09-30","val":12199000,"accn":"0001553326-15-000053","fy":2015,"fp":"FY","form":"10-K","filed":"2015-12-10","frame":"CY2015Q3I"},{"end":"2016-09-30","val":5089000,"accn":"0001553326-16-000106","fy":2016,"fp":"FY","form":"10-K","filed":"2016-12-02","frame":"CY2016Q3I"},{"end":"2017-09-30","val":10480000,"accn":"0001553326-17-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2017-12-05","frame":"CY2017Q3I"}]}},"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":"2013-09-30","val":2500000,"accn":"0001553326-13-000005","fy":2013,"fp":"FY","form":"10-K","filed":"2013-12-24","frame":"CY2013Q3I"},{"end":"2014-09-30","val":9719000,"accn":"0001553326-14-000056","fy":2014,"fp":"FY","form":"10-K","filed":"2014-12-09","frame":"CY2014Q3I"},{"end":"2015-09-30","val":15697000,"accn":"0001553326-15-000053","fy":2015,"fp":"FY","form":"10-K","filed":"2015-12-10","frame":"CY2015Q3I"},{"end":"2016-09-30","val":15018000,"accn":"0001553326-16-000106","fy":2016,"fp":"FY","form":"10-K","filed":"2016-12-02","frame":"CY2016Q3I"},{"end":"2017-09-30","val":7125000,"accn":"0001553326-17-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2017-12-05","frame":"CY2017Q3I"}]}},"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":"2013-09-30","val":55565000,"accn":"0001553326-13-000005","fy":2013,"fp":"FY","form":"10-K","filed":"2013-12-24","frame":"CY2013Q3I"},{"end":"2014-09-30","val":40585000,"accn":"0001553326-14-000056","fy":2014,"fp":"FY","form":"10-K","filed":"2014-12-09","frame":"CY2014Q3I"},{"end":"2015-09-30","val":51150000,"accn":"0001553326-15-000053","fy":2015,"fp":"FY","form":"10-K","filed":"2015-12-10","frame":"CY2015Q3I"},{"end":"2016-09-30","val":67602000,"accn":"0001553326-16-000106","fy":2016,"fp":"FY","form":"10-K","filed":"2016-12-02","frame":"CY2016Q3I"},{"end":"2017-09-30","val":102922000,"accn":"0001553326-17-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2017-12-05","frame":"CY2017Q3I"}]}},"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":"2013-09-30","val":8809000,"accn":"0001553326-13-000005","fy":2013,"fp":"FY","form":"10-K","filed":"2013-12-24","frame":"CY2013Q3I"},{"end":"2014-09-30","val":19047000,"accn":"0001553326-14-000056","fy":2014,"fp":"FY","form":"10-K","filed":"2014-12-09","frame":"CY2014Q3I"},{"end":"2015-09-30","val":17820000,"accn":"0001553326-15-000053","fy":2015,"fp":"FY","form":"10-K","filed":"2015-12-10","frame":"CY2015Q3I"},{"end":"2016-09-30","val":23379000,"accn":"0001553326-16-000106","fy":2016,"fp":"FY","form":"10-K","filed":"2016-12-02","frame":"CY2016Q3I"},{"end":"2017-09-30","val":27869000,"accn":"0001553326-17-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2017-12-05","frame":"CY2017Q3I"}]}},"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":"2013-09-30","val":19361000,"accn":"0001553326-13-000005","fy":2013,"fp":"FY","form":"10-K","filed":"2013-12-24","frame":"CY2013Q3I"},{"end":"2014-09-30","val":16548000,"accn":"0001553326-14-000056","fy":2014,"fp":"FY","form":"10-K","filed":"2014-12-09","frame":"CY2014Q3I"},{"end":"2015-09-30","val":25393000,"accn":"0001553326-15-000053","fy":2015,"fp":"FY","form":"10-K","filed":"2015-12-10","frame":"CY2015Q3I"},{"end":"2016-09-30","val":35434000,"accn":"0001553326-16-000106","fy":2016,"fp":"FY","form":"10-K","filed":"2016-12-02","frame":"CY2016Q3I"},{"end":"2017-09-30","val":36193000,"accn":"0001553326-17-000047","fy":2017,"fp":"FY","form":"10-K","filed":"2017-12-05","frame":"CY2017Q3I"}]}},"TimeDeposits":{"label":"Time Deposits","description":"Amount of time deposit liabilities, including certificates of 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