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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":"2013-06-30","val":3,"accn":"0001104659-13-060289","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-06"},{"start":"2013-01-01","end":"2013-09-30","val":3,"accn":"0001104659-13-081540","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-06"},{"start":"2014-01-01","end":"2014-03-31","val":3,"accn":"0001104659-14-035290","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-06","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-09-30","val":3,"accn":"0001104659-14-075382","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-10-31"},{"start":"2015-01-01","end":"2015-03-31","val":3,"accn":"0001104659-15-035677","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-07","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":3,"accn":"0001104659-15-057268","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-06"},{"start":"2015-01-01","end":"2015-09-30","val":3,"accn":"0001104659-15-077290","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-09"},{"start":"2016-01-01","end":"2016-03-31","val":3,"accn":"0001104659-16-114254","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-04-26","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":3,"accn":"0001104659-16-136568","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-03"},{"start":"2016-01-01","end":"2016-09-30","val":3,"accn":"0001104659-16-154573","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-03"}],"segment":[{"start":"2011-01-01","end":"2011-12-31","val":2,"accn":"0001047469-14-001401","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-26","frame":"CY2011"},{"start":"2013-01-01","end":"2013-12-31","val":3,"accn":"0001047469-14-001401","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-26","frame":"CY2013"},{"start":"2014-01-01","end":"2014-06-30","val":3,"accn":"0001104659-14-055807","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01"},{"start":"2014-01-01","end":"2014-12-31","val":3,"accn":"0001047469-15-001062","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-23","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":3,"accn":"0001047469-16-010284","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-22","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":3,"accn":"0001047469-17-000837","fy":2016,"fp":"FY","form":"10-K","filed":"2017-02-22","frame":"CY2016"},{"start":"2017-01-01","end":"2017-03-31","val":3,"accn":"0001104659-17-029668","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-04","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":3,"accn":"0001104659-17-050315","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-08"},{"start":"2017-01-01","end":"2017-09-30","val":3,"accn":"0001104659-17-066685","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-11-07"},{"start":"2017-01-01","end":"2017-12-31","val":3,"accn":"0001574774-18-000014","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-27","frame":"CY2017"},{"start":"2018-01-01","end":"2018-03-31","val":2,"accn":"0001574774-18-000026","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-04-27","frame":"CY2018Q1"},{"start":"2018-01-01","end":"2018-06-30","val":2,"accn":"0001574774-18-000051","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-07-27"},{"start":"2018-01-01","end":"2018-09-30","val":2,"accn":"0001574774-18-000062","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-10-31"}]}},"NumberOfReportableSegments":{"label":"Number of Reportable Segments","description":"Number of segments reported by the entity. 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