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Shares issued include shares outstanding and shares held in the treasury.","units":{"shares":[{"end":"2010-12-31","val":15663331,"accn":"0001193125-11-219801","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":15663331,"accn":"0001193125-11-295132","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":15663331,"accn":"0001193125-12-092103","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-01","frame":"CY2010Q4I"},{"end":"2011-06-30","val":30967679,"accn":"0001193125-11-219801","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":30289813,"accn":"0001193125-11-295132","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":30289813,"accn":"0001193125-12-092103","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-01"},{"end":"2011-12-31","val":30289813,"accn":"0001193125-12-208504","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":30289813,"accn":"0001193125-12-331750","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":34891101,"accn":"0001193125-12-460864","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":30289813,"accn":"0001193125-13-085186","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2011Q4I"},{"end":"2012-03-31","val":33641501,"accn":"0001193125-12-208504","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":33732448,"accn":"0001193125-12-331750","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":34891101,"accn":"0001193125-12-460864","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-10-30","val":9775000,"accn":"0001193125-12-460864","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2012-12-31","val":44905683,"accn":"0001193125-13-085186","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01"},{"end":"2012-12-31","val":44905683,"accn":"0001193125-13-196378","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":44905683,"accn":"0001193125-13-314867","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":44905683,"accn":"0001193125-13-432753","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07"},{"end":"2012-12-31","val":44905683,"accn":"0001193125-14-073449","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-27","frame":"CY2012Q4I"},{"end":"2013-03-31","val":47033085,"accn":"0001193125-13-196378","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":48026373,"accn":"0001193125-13-314867","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":48172773,"accn":"0001193125-13-432753","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07","frame":"CY2013Q3I"},{"end":"2013-12-31","val":48381365,"accn":"0001193125-14-073449","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-27"},{"end":"2013-12-31","val":48381365,"accn":"0001193125-14-178354","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":48381365,"accn":"0001193125-14-289344","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-07-31"},{"end":"2013-12-31","val":48381365,"accn":"0001193125-14-400735","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-06"},{"end":"2013-12-31","val":48381365,"accn":"0001193125-15-070428","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":48455186,"accn":"0001193125-14-178354","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02","frame":"CY2014Q1I"},{"end":"2014-06-30","val":61116598,"accn":"0001193125-14-289344","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-07-31","frame":"CY2014Q2I"},{"end":"2014-09-30","val":61116408,"accn":"0001193125-14-400735","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-06","frame":"CY2014Q3I"},{"end":"2014-12-31","val":61113372,"accn":"0001193125-15-070428","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":61113372,"accn":"0001193125-15-166387","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-01"},{"end":"2014-12-31","val":61113372,"accn":"0001193125-15-271104","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-30","frame":"CY2014Q4I"},{"end":"2015-03-31","val":63403152,"accn":"0001193125-15-166387","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-01","frame":"CY2015Q1I"},{"end":"2015-06-30","val":63415748,"accn":"0001193125-15-271104","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-30","frame":"CY2015Q2I"}]}},"CommonStockSharesOutstanding":{"label":"Common Stock, Shares, Outstanding","description":"Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.","units":{"shares":[{"end":"2010-12-31","val":15663331,"accn":"0001193125-11-219801","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11"},{"end":"2010-12-31","val":15663331,"accn":"0001193125-11-295132","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":15663331,"accn":"0001193125-12-092103","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-01","frame":"CY2010Q4I"},{"end":"2011-06-30","val":30967679,"accn":"0001193125-11-219801","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-11","frame":"CY2011Q2I"},{"end":"2011-09-30","val":30289813,"accn":"0001193125-11-295132","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":30289813,"accn":"0001193125-12-092103","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-01"},{"end":"2011-12-31","val":30289813,"accn":"0001193125-12-208504","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03"},{"end":"2011-12-31","val":30289813,"accn":"0001193125-12-331750","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":30289813,"accn":"0001193125-12-460864","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"end":"2011-12-31","val":30289813,"accn":"0001193125-13-085186","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2011Q4I"},{"end":"2012-03-31","val":33641501,"accn":"0001193125-12-208504","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-05-03","frame":"CY2012Q1I"},{"end":"2012-06-30","val":33732448,"accn":"0001193125-12-331750","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":30289813,"accn":"0001193125-12-460864","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":44905683,"accn":"0001193125-13-085186","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01"},{"end":"2012-12-31","val":44905683,"accn":"0001193125-13-196378","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02"},{"end":"2012-12-31","val":44905683,"accn":"0001193125-13-314867","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01"},{"end":"2012-12-31","val":44905683,"accn":"0001193125-13-432753","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07"},{"end":"2012-12-31","val":44905683,"accn":"0001193125-14-073449","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-27","frame":"CY2012Q4I"},{"end":"2013-03-31","val":47033085,"accn":"0001193125-13-196378","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-02","frame":"CY2013Q1I"},{"end":"2013-06-30","val":48026373,"accn":"0001193125-13-314867","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-01","frame":"CY2013Q2I"},{"end":"2013-09-30","val":48172773,"accn":"0001193125-13-432753","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-07","frame":"CY2013Q3I"},{"end":"2013-12-31","val":48381365,"accn":"0001193125-14-073449","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-27"},{"end":"2013-12-31","val":48381365,"accn":"0001193125-14-178354","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02"},{"end":"2013-12-31","val":48381365,"accn":"0001193125-14-289344","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-07-31"},{"end":"2013-12-31","val":48381365,"accn":"0001193125-14-400735","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-06"},{"end":"2013-12-31","val":48381365,"accn":"0001193125-15-070428","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02","frame":"CY2013Q4I"},{"end":"2014-03-31","val":48455186,"accn":"0001193125-14-178354","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-02","frame":"CY2014Q1I"},{"end":"2014-06-30","val":61116598,"accn":"0001193125-14-289344","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-07-31","frame":"CY2014Q2I"},{"end":"2014-09-30","val":61116408,"accn":"0001193125-14-400735","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-06","frame":"CY2014Q3I"},{"end":"2014-12-31","val":61113372,"accn":"0001193125-15-070428","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-02"},{"end":"2014-12-31","val":61113372,"accn":"0001193125-15-166387","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-01"},{"end":"2014-12-31","val":61113372,"accn":"0001193125-15-271104","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-30","frame":"CY2014Q4I"},{"end":"2015-03-31","val":63403152,"accn":"0001193125-15-166387","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-01","frame":"CY2015Q1I"},{"end":"2015-06-30","val":63415748,"accn":"0001193125-15-271104","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-30","frame":"CY2015Q2I"}]}},"CommonStockValue":{"label":"Common Stock, Value, Issued","description":"Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. 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y":{"label":"Contribution 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Includes, but is not limited to, notes and loan 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