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Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.","units":{"USD":[{"end":"2011-12-31","val":72082000,"accn":"0001193125-13-040818","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-06","frame":"CY2011Q4I"},{"end":"2011-12-31","val":72082000,"accn":"0001193125-12-439947","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-10-29"},{"end":"2011-12-31","val":72082000,"accn":"0001193125-12-332622","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-03"},{"end":"2012-06-30","val":72161000,"accn":"0001193125-12-332622","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-03","frame":"CY2012Q2I"},{"end":"2012-09-30","val":63106000,"accn":"0001193125-12-439947","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-10-29","frame":"CY2012Q3I"},{"end":"2012-12-31","val":60089000,"accn":"0001445305-13-001002","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-01"},{"end":"2012-12-31","val":60089000,"accn":"0001288469-13-000003","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q4I"},{"end":"2012-12-31","val":60089000,"accn":"0001193125-13-040818","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-06"},{"end":"2013-03-31","val":60111000,"accn":"0001445305-13-001002","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-01","frame":"CY2013Q1I"},{"end":"2013-06-30","val":60121000,"accn":"0001288469-13-000003","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"}]}},"AvailableForSaleSecuritiesGrossUnrealizedLosses1":{"label":"Available-for-sale Securities, Gross Unrealized Losses (Deprecated 2013-01-31)","description":"This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.","units":{"USD":[{"end":"2011-12-31","val":30000,"accn":"0001193125-13-040818","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-06","frame":"CY2011Q4I"},{"end":"2011-12-31","val":30000,"accn":"0001193125-12-439947","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-10-29"},{"end":"2011-12-31","val":-30000,"accn":"0001193125-12-332622","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-03"},{"end":"2012-06-30","val":-17000,"accn":"0001193125-12-332622","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-03","frame":"CY2012Q2I"},{"end":"2012-09-30","val":4000,"accn":"0001193125-12-439947","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-10-29","frame":"CY2012Q3I"},{"end":"2012-12-31","val":4000,"accn":"0001445305-13-001002","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-01"},{"end":"2012-12-31","val":4000,"accn":"0001288469-13-000003","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2012Q4I"},{"end":"2012-12-31","val":4000,"accn":"0001193125-13-040818","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-06"},{"end":"2013-03-31","val":16000,"accn":"0001445305-13-001002","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-01","frame":"CY2013Q1I"},{"end":"2013-06-30","val":43000,"accn":"0001288469-13-000003","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"}]}},"AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions":{"label":"Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions (Deprecated 2013-01-31)","description":"Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). 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Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, 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