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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 (basic).","units":{"shares":[{"start":"2012-01-01","end":"2012-06-30","val":29538381,"accn":"0001144204-13-045044","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-13"},{"start":"2012-04-01","end":"2012-06-30","val":29706704,"accn":"0001144204-13-045044","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-13","frame":"CY2012Q2"},{"start":"2013-01-01","end":"2013-06-30","val":29799523,"accn":"0001144204-13-045044","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-13"},{"start":"2013-04-01","end":"2013-06-30","val":29799523,"accn":"0001144204-13-045044","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-13","frame":"CY2013Q2"}]}},"WeightedAverageNumberOfSharesOutstandingBasic":{"label":"Weighted Average Number of Shares Outstanding, Basic","description":"Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that 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