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Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes 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. Includes effect from exchange rate 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Excludes amount for disposal group and discontinued operations. 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. 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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. 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This item includes treasury stock repurchased by the entity. 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This element refers to the Gain included in earnings and not to the cash proceeds of the sale.","units":{"USD":[{"start":"2011-02-01","end":"2011-07-31","val":996000,"accn":"0001157523-12-004817","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-09-10"},{"start":"2011-02-01","end":"2011-10-31","val":996000,"accn":"0001157523-12-006330","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-12-11"},{"start":"2011-02-01","end":"2012-01-31","val":996000,"accn":"0001157523-13-001805","fy":2012,"fp":"FY","form":"10-K","filed":"2013-04-16"},{"start":"2011-02-01","end":"2012-01-31","val":996000,"accn":"0001193125-13-425444","fy":0,"fp":"","form":"8-K","filed":"2013-11-04"},{"start":"2011-02-01","end":"2012-01-31","val":996000,"accn":"0001193125-14-177425","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-01"},{"start":"2011-02-01","end":"2012-01-31","val":996000,"accn":"0001193125-14-385713","fy":null,"fp":null,"form":"8-K","filed":"2014-10-29","frame":"CY2011"}]}},"GainsLossesOnExtinguishmentOfDebt":{"label":"Gain (Loss) on Extinguishment of Debt","description":"Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.","units":{"USD":[{"start":"2015-02-01","end":"2015-04-30","val":4236000,"accn":"0001564590-15-004922","fy":2016,"fp":"Q1","form":"10-Q","filed":"2015-06-09"},{"start":"2015-02-01","end":"2015-04-30","val":4236000,"accn":"0001564590-16-020326","fy":2017,"fp":"Q1","form":"10-Q","filed":"2016-06-07","frame":"CY2015Q1"},{"start":"2015-02-01","end":"2015-07-31","val":4236000,"accn":"0001564590-15-007803","fy":2016,"fp":"Q2","form":"10-Q","filed":"2015-09-09"},{"start":"2015-02-01","end":"2015-07-31","val":4236000,"accn":"0001564590-16-024939","fy":2017,"fp":"Q2","form":"10-Q","filed":"2016-09-06"},{"start":"2015-02-01","end":"2015-10-31","val":4236000,"accn":"0001564590-15-011377","fy":2016,"fp":"Q3","form":"10-Q","filed":"2015-12-10"},{"start":"2015-02-01","end":"2015-10-31","val":4236000,"accn":"0001564590-16-030020","fy":2017,"fp":"Q3","form":"10-Q","filed":"2016-12-08"},{"start":"2015-02-01","end":"2016-01-31","val":4236000,"accn":"0001564590-16-016121","fy":2016,"fp":"FY","form":"10-K","filed":"2016-04-13"},{"start":"2015-02-01","end":"2016-01-31","val":4236000,"accn":"0001564590-17-006314","fy":2017,"fp":"FY","form":"10-K","filed":"2017-04-10"},{"start":"2015-02-01","end":"2016-01-31","val":4236000,"accn":"0000950123-18-002720","fy":2017,"fp":null,"form":"8-K","filed":"2018-02-27"},{"start":"2015-02-01","end":"2016-01-31","val":4236000,"accn":"0001564590-18-007953","fy":2018,"fp":"FY","form":"10-K","filed":"2018-04-10","frame":"CY2015"}]}},"GainsLossesOnSalesOfInvestmentRealEstate":{"label":"Gains 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Alternate caption for the concept is permanent 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