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Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, 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.","units":{"USD":[{"end":"2016-09-30","val":48226000,"accn":"0001193125-19-300565","fy":2019,"fp":"FY","form":"10-K","filed":"2019-11-26","frame":"CY2016Q3I"},{"end":"2017-09-30","val":58072000,"accn":"0001193125-19-034030","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-02-11"},{"end":"2017-09-30","val":58072000,"accn":"0001193125-19-139559","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-05-07"},{"end":"2017-09-30","val":58072000,"accn":"0001193125-19-214674","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-08-07"},{"end":"2017-09-30","val":58072000,"accn":"0001193125-19-300565","fy":2019,"fp":"FY","form":"10-K","filed":"2019-11-26"},{"end":"2017-09-30","val":58072000,"accn":"0001193125-20-300813","fy":2020,"fp":"FY","form":"10-K","filed":"2020-11-23","frame":"CY2017Q3I"},{"end":"2017-12-31","val":55711000,"accn":"0001193125-19-034030","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-02-11","frame":"CY2017Q4I"},{"end":"2018-03-31","val":57400000,"accn":"0001193125-19-139559","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-05-07","frame":"CY2018Q1I"},{"end":"2018-06-30","val":58930000,"accn":"0001193125-19-214674","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-08-07","frame":"CY2018Q2I"},{"end":"2018-09-30","val":60763000,"accn":"0001193125-19-034030","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-02-11"},{"end":"2018-09-30","val":60763000,"accn":"0001193125-19-139559","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-05-07"},{"end":"2018-09-30","val":60763000,"accn":"0001193125-19-214674","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-08-07"},{"end":"2018-09-30","val":60763000,"accn":"0001193125-19-300565","fy":2019,"fp":"FY","form":"10-K","filed":"2019-11-26"},{"end":"2018-09-30","val":60763000,"accn":"0001193125-20-027769","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-02-07"},{"end":"2018-09-30","val":60763000,"accn":"0001193125-20-137039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-05-08"},{"end":"2018-09-30","val":60763000,"accn":"0001193125-20-300813","fy":2020,"fp":"FY","form":"10-K","filed":"2020-11-23"},{"end":"2018-09-30","val":60763000,"accn":"0001193125-21-337663","fy":2021,"fp":"FY","form":"10-K","filed":"2021-11-23","frame":"CY2018Q3I"},{"end":"2018-12-31","val":62523000,"accn":"0001193125-19-034030","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-02-11"},{"end":"2018-12-31","val":62523000,"accn":"0001193125-20-027769","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-02-07","frame":"CY2018Q4I"},{"end":"2019-03-31","val":67097000,"accn":"0001193125-19-139559","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-05-07"},{"end":"2019-03-31","val":67097000,"accn":"0001193125-20-137039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-05-08","frame":"CY2019Q1I"},{"end":"2019-06-30","val":55192000,"accn":"0001193125-19-214674","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-08-07","frame":"CY2019Q2I"},{"end":"2019-09-30","val":62397000,"accn":"0001193125-19-300565","fy":2019,"fp":"FY","form":"10-K","filed":"2019-11-26"},{"end":"2019-09-30","val":62397000,"accn":"0001193125-20-027769","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-02-07"},{"end":"2019-09-30","val":62397000,"accn":"0001193125-20-137039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-05-08"},{"end":"2019-09-30","val":62397000,"accn":"0001193125-20-300813","fy":2020,"fp":"FY","form":"10-K","filed":"2020-11-23"},{"end":"2019-09-30","val":62397000,"accn":"0001193125-21-029901","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-02-05"},{"end":"2019-09-30","val":62397000,"accn":"0001193125-21-154105","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-05-07"},{"end":"2019-09-30","val":62397000,"accn":"0001193125-21-238736","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-08-06"},{"end":"2019-09-30","val":62397000,"accn":"0001193125-21-337663","fy":2021,"fp":"FY","form":"10-K","filed":"2021-11-23","frame":"CY2019Q3I"},{"end":"2019-12-31","val":68557000,"accn":"0001193125-20-027769","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-02-07"},{"end":"2019-12-31","val":68557000,"accn":"0001193125-21-029901","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-02-05","frame":"CY2019Q4I"},{"end":"2020-03-31","val":49550000,"accn":"0001193125-20-137039","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-05-08"},{"end":"2020-03-31","val":49550000,"accn":"0001193125-21-154105","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":63445000,"accn":"0001193125-21-238736","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-08-06","frame":"CY2020Q2I"},{"end":"2020-09-30","val":53514000,"accn":"0001193125-20-300813","fy":2020,"fp":"FY","form":"10-K","filed":"2020-11-23"},{"end":"2020-09-30","val":53514000,"accn":"0001193125-21-029901","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-02-05"},{"end":"2020-09-30","val":53514000,"accn":"0001193125-21-154105","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-05-07"},{"end":"2020-09-30","val":53514000,"accn":"0001193125-21-238736","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-08-06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