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ivableWithNoRelatedAllowanceRecordedInvestment":{"label":"Impaired 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Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-12-31","val":20000000,"accn":"0001193125-14-114221","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-25","frame":"CY2013Q4I"},{"end":"2014-12-31","val":0,"accn":"0001193125-15-106774","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-26","frame":"CY2014Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree":{"label":"Long-Term Debt, Maturity, Year Three","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-12-31","val":10500000,"accn":"0001193125-13-126801","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-26","frame":"CY2012Q4I"},{"end":"2013-12-31","val":5000000,"accn":"0001193125-14-114221","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-25","frame":"CY2013Q4I"},{"end":"2014-12-31","val":20000000,"accn":"0001193125-15-106774","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-26","frame":"CY2014Q4I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo":{"label":"Long-Term Debt, Maturity, Year Two","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. 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of Dividends","description":"Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling 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Weighted average relates to the portion of time within a reporting period that common shares have been issued and outstanding to the total time in that period. Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share 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