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An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.","units":{"item":[{"start":"2013-01-01","end":"2013-03-31","val":5,"accn":"0001104659-13-038930","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-08","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":5,"accn":"0001104659-13-061744","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-08"},{"start":"2013-01-01","end":"2013-09-30","val":5,"accn":"0001104659-13-082842","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-08"},{"start":"2014-01-01","end":"2014-03-31","val":5,"accn":"0001104659-14-036580","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-08","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":5,"accn":"0001104659-14-058925","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-08"},{"start":"2014-01-01","end":"2014-09-30","val":5,"accn":"0001104659-14-079854","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-12"},{"start":"2015-01-01","end":"2015-03-31","val":5,"accn":"0001104659-15-036288","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-08","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":5,"accn":"0001104659-15-056562","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-05"},{"start":"2015-01-01","end":"2015-09-30","val":5,"accn":"0001104659-15-076761","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-06"},{"start":"2016-01-01","end":"2016-03-31","val":5,"accn":"0001104659-16-118795","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-06","frame":"CY2016Q1"}],"segment":[{"start":"2012-01-01","end":"2012-06-30","val":4,"accn":"0001104659-12-054155","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-03"},{"start":"2012-01-01","end":"2012-09-30","val":4,"accn":"0001104659-12-073692","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-02"},{"start":"2012-01-01","end":"2012-12-31","val":4,"accn":"0001104659-13-012759","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-21","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":5,"accn":"0001104659-14-012776","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-24","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":5,"accn":"0001104659-15-013463","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-24","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":5,"accn":"0001104659-16-099794","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-25","frame":"CY2015"},{"start":"2016-01-01","end":"2016-06-30","val":5,"accn":"0001104659-16-137643","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-05"},{"start":"2016-01-01","end":"2016-09-30","val":5,"accn":"0001104659-16-155559","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-08"},{"start":"2016-01-01","end":"2016-12-31","val":5,"accn":"0001104659-17-013038","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":5,"accn":"0001104659-17-031548","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":5,"accn":"0001104659-17-049926","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-07"}]}},"NumberOfReportingUnits":{"label":"Number of Reporting Units","description":"Number of reporting units tested for impairment of goodwill. 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