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Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related 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Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents.","units":{"USD":[{"end":"2013-12-31","val":420502000,"accn":"0001027884-18-000013","fy":null,"fp":null,"form":"8-K","filed":"2018-01-23","frame":"CY2013Q4I"},{"end":"2014-12-31","val":351323000,"accn":"0001027884-18-000013","fy":null,"fp":null,"form":"8-K","filed":"2018-01-23"},{"end":"2014-12-31","val":351323000,"accn":"0001027884-18-000045","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21","frame":"CY2014Q4I"},{"end":"2015-12-31","val":550221000,"accn":"0001027884-17-000156","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10"},{"end":"2015-12-31","val":550221000,"accn":"0001027884-17-000196","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2015-12-31","val":550221000,"accn":"0001027884-17-000206","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-10-31"},{"end":"2015-12-31","val":550221000,"accn":"0001027884-18-000013","fy":null,"fp":null,"form":"8-K","filed":"2018-01-23"},{"end":"2015-12-31","val":550221000,"accn":"0001027884-18-000045","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21","frame":"CY2015Q4I"},{"end":"2016-03-31","val":641485000,"accn":"0001027884-17-000156","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10","frame":"CY2016Q1I"},{"end":"2016-06-30","val":602912000,"accn":"0001027884-17-000196","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2016Q2I"},{"end":"2016-09-30","val":614966000,"accn":"0001027884-17-000206","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-10-31","frame":"CY2016Q3I"},{"end":"2016-12-31","val":505156000,"accn":"0001027884-17-000156","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10"},{"end":"2016-12-31","val":505156000,"accn":"0001027884-17-000196","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"end":"2016-12-31","val":505156000,"accn":"0001027884-17-000206","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-10-31"},{"end":"2016-12-31","val":505156000,"accn":"0001027884-18-000013","fy":null,"fp":null,"form":"8-K","filed":"2018-01-23"},{"end":"2016-12-31","val":505156000,"accn":"0001027884-18-000045","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21"},{"end":"2016-12-31","val":505156000,"accn":"0001027884-18-000058","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-04-24","frame":"CY2016Q4I"},{"end":"2017-03-31","val":420079000,"accn":"0001027884-17-000156","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10"},{"end":"2017-03-31","val":420079000,"accn":"0001027884-18-000058","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-04-24","frame":"CY2017Q1I"},{"end":"2017-06-30","val":354920000,"accn":"0001027884-17-000196","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09","frame":"CY2017Q2I"},{"end":"2017-09-30","val":341869000,"accn":"0001027884-17-000206","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-10-31","frame":"CY2017Q3I"},{"end":"2017-12-31","val":354639000,"accn":"0001027884-18-000045","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21"},{"end":"2017-12-31","val":354639000,"accn":"0001027884-18-000058","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-04-24","frame":"CY2017Q4I"},{"end":"2018-03-31","val":305229000,"accn":"0001027884-18-000058","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-04-24","frame":"CY2018Q1I"}]}},"CashAndCashEquivalentsFairValueDisclosure":{"label":"Cash and Cash Equivalents, Fair Value Disclosure","description":"Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. 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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":{"Segment":[{"start":"2014-01-01","end":"2014-12-31","val":4,"accn":"0001027884-15-000095","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-25"},{"start":"2014-01-01","end":"2014-12-31","val":4,"accn":"0001027884-15-000145","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-04-24"},{"start":"2014-01-01","end":"2014-12-31","val":4,"accn":"0001027884-15-000213","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-24"},{"start":"2014-01-01","end":"2014-12-31","val":4,"accn":"0001027884-15-000246","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-06","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":4,"accn":"0001027884-15-000145","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-04-24"},{"start":"2015-01-01","end":"2015-03-31","val":4,"accn":"0001027884-15-000246","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-06","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":4,"accn":"0001027884-15-000213","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-24"},{"start":"2015-01-01","end":"2015-09-30","val":4,"accn":"0001027884-15-000246","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-06"}],"segment":[{"start":"2014-01-01","end":"2014-12-31","val":4,"accn":"0001027884-16-000357","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":4,"accn":"0001027884-16-000357","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26","frame":"CY2015Q1"},{"end":"2015-10-01","val":4,"accn":"0001027884-16-000357","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26","frame":"CY2015Q3I"},{"start":"2015-01-01","end":"2015-12-31","val":4,"accn":"0001027884-16-000357","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-26"},{"start":"2015-01-01","end":"2015-12-31","val":4,"accn":"0001027884-16-000444","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-07-27"},{"start":"2015-01-01","end":"2015-12-31","val":4,"accn":"0001027884-16-000480","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-10-28","frame":"CY2015"},{"start":"2016-01-01","end":"2016-03-31","val":4,"accn":"0001027884-16-000392","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-04-21","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":4,"accn":"0001027884-16-000444","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-07-27"},{"start":"2016-01-01","end":"2016-09-30","val":4,"accn":"0001027884-16-000480","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-10-28"},{"end":"2016-10-01","val":3,"accn":"0001027884-18-000013","fy":null,"fp":null,"form":"8-K","filed":"2018-01-23","frame":"CY2016Q3I"},{"start":"2016-01-01","end":"2016-12-31","val":4,"accn":"0001027884-17-000082","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"start":"2016-01-01","end":"2016-12-31","val":2,"accn":"0001027884-18-000013","fy":null,"fp":null,"form":"8-K","filed":"2018-01-23","frame":"CY2016"},{"start":"2016-10-01","end":"2016-12-31","val":4,"accn":"0001027884-17-000082","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-01"},{"start":"2016-10-01","end":"2016-12-31","val":4,"accn":"0001027884-18-000013","fy":null,"fp":null,"form":"8-K","filed":"2018-01-23","frame":"CY2016Q4"},{"start":"2017-01-01","end":"2017-03-31","val":3,"accn":"0001027884-17-000156","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-10","frame":"CY2017Q1"},{"start":"2017-01-01","end":"2017-06-30","val":3,"accn":"0001027884-17-000196","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-08-09"},{"start":"2017-01-01","end":"2017-06-30","val":4,"accn":"0001027884-18-000045","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21"},{"start":"2017-01-01","end":"2017-09-30","val":2,"accn":"0001027884-17-000206","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-10-31"},{"start":"2017-07-01","end":"2017-09-30","val":2,"accn":"0001027884-18-000045","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21","frame":"CY2017Q3"},{"start":"2017-01-01","end":"2017-12-31","val":3,"accn":"0001027884-18-000045","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-31","val":3,"accn":"0001027884-18-000045","fy":2017,"fp":"FY","form":"10-K","filed":"2018-02-21","frame":"CY2017Q4"},{"start":"2018-01-01","end":"2018-03-31","val":3,"accn":"0001027884-18-000058","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-04-24","frame":"CY2018Q1"}]}},"NumberOfReportableSegments":{"label":"Number of Reportable Segments","description":"Number of segments reported by the entity. 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Amount excludes temporary equity. Alternate caption for the concept is permanent 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