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May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.","units":{"shares":[{"end":"2011-12-31","val":74234667,"accn":"0001193125-13-118263","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-21","frame":"CY2011Q4I"},{"end":"2011-12-31","val":74234667,"accn":"0001193125-12-455907","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-07"},{"end":"2011-12-31","val":74234667,"accn":"0001193125-12-342527","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08"},{"end":"2012-06-30","val":74234667,"accn":"0001193125-12-342527","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-08","frame":"CY2012Q2I"},{"end":"2012-09-30","val":74234667,"accn":"0001193125-12-455907","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-07","frame":"CY2012Q3I"},{"end":"2012-12-31","val":74234667,"accn":"0001193125-13-431574","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07","frame":"CY2012Q4I"},{"end":"2012-12-31","val":74234667,"accn":"0001193125-13-325578","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"end":"2012-12-31","val":74234667,"accn":"0001193125-13-209161","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-09"},{"end":"2012-12-31","val":74234667,"accn":"0001193125-13-118263","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-21"},{"end":"2013-03-31","val":74234667,"accn":"0001193125-13-209161","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-09","frame":"CY2013Q1I"},{"end":"2013-06-30","val":74234667,"accn":"0001193125-13-325578","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2013Q2I"},{"end":"2013-09-30","val":74234667,"accn":"0001193125-13-431574","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07","frame":"CY2013Q3I"}]}},"PreferredStockValue":{"label":"Preferred Stock, Value, Issued","description":"Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. 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May be all or a portion of the number of preferred shares authorized. These shares represent the ownership interest of the preferred 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from Lines of Credit","description":"Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit 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