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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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Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting 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Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.","units":{"pure":[{"start":"2010-01-01","end":"2010-12-31","val":0.892,"accn":"0001193125-13-112464","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-18","frame":"CY2010"},{"start":"2011-04-01","end":"2011-06-30","val":0.844,"accn":"0001144204-12-048414","fy":2012,"fp":"Q2","form":"10-Q/A","filed":"2012-08-28","frame":"CY2011Q2"},{"start":"2011-07-01","end":"2011-09-30","val":0.8326,"accn":"0001144204-12-060430","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2011Q3"},{"start":"2011-01-01","end":"2011-12-31","val":0.8326,"accn":"0001193125-13-112464","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-18"},{"start":"2011-01-01","end":"2011-12-31","val":0.8326,"accn":"0001193125-14-080282","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":0.8348,"accn":"0001193125-13-204366","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-07","frame":"CY2012Q1"},{"start":"2012-04-01","end":"2012-06-30","val":0.8336,"accn":"0001144204-12-048414","fy":2012,"fp":"Q2","form":"10-Q/A","filed":"2012-08-28"},{"start":"2012-04-01","end":"2012-06-30","val":0.8336,"accn":"0001193125-13-326769","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08","frame":"CY2012Q2"},{"start":"2012-07-01","end":"2012-09-30","val":0.8337,"accn":"0001144204-12-060430","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":0.8337,"accn":"0001193125-13-406591","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-22","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":0.8336,"accn":"0001193125-13-112464","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-18"},{"start":"2012-01-01","end":"2012-12-31","val":0.8336,"accn":"0001193125-14-080282","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2012-01-01","end":"2012-12-31","val":0.8336,"accn":"0001193125-15-065956","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":0.834,"accn":"0001193125-13-204366","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-07"},{"start":"2013-01-01","end":"2013-03-31","val":0.834,"accn":"0001193125-14-189905","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-08","frame":"CY2013Q1"},{"start":"2013-07-01","end":"2013-09-30","val":0.9496,"accn":"0001193125-13-406591","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-22"},{"start":"2013-07-01","end":"2013-09-30","val":0.9496,"accn":"0001193125-14-389572","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-10-30","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":0.834,"accn":"0001193125-14-080282","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-03"},{"start":"2013-01-01","end":"2013-12-31","val":0.834,"accn":"0001193125-15-065956","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26"},{"start":"2013-01-01","end":"2013-12-31","val":0.834,"accn":"0001193125-16-475875","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-24","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":0.9446,"accn":"0001193125-14-189905","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-08"},{"start":"2014-01-01","end":"2014-03-31","val":0.9446,"accn":"0001193125-15-177165","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-12-31","val":0.8522,"accn":"0001193125-15-065956","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26"},{"start":"2014-01-01","end":"2014-12-31","val":0.8522,"accn":"0001193125-16-475875","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-24"},{"start":"2014-01-01","end":"2014-12-31","val":0.8522,"accn":"0001193125-17-046668","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-16","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":0.8548,"accn":"0001193125-15-177165","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07"},{"start":"2015-01-01","end":"2015-03-31","val":0.8548,"accn":"0001193125-16-585559","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-09-30","val":0.8001,"accn":"0001193125-16-764305","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-09"},{"start":"2015-01-01","end":"2015-12-31","val":0.7913,"accn":"0001193125-16-475875","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-24"},{"start":"2015-01-01","end":"2015-12-31","val":0.7913,"accn":"0001193125-17-046668","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-16"},{"start":"2015-01-01","end":"2015-12-31","val":0.7913,"accn":"0001193125-18-067077","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-01","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":0.7915,"accn":"0001193125-16-585559","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-10"},{"start":"2016-01-01","end":"2016-03-31","val":0.7915,"accn":"0001193125-17-151749","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-01","frame":"CY2016Q1"},{"start":"2016-04-01","end":"2016-06-30","val":0.807,"accn":"0001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