{"cik":1589526,"taxonomy":"us-gaap","tag":"Revenues","label":"Revenues","description":"Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).","entityName":"BLUE BIRD CORPORATION","units":{"USD":[{"start":"2012-09-30","end":"2013-09-28","val":776558000,"accn":"0001589526-15-000089","fy":2015,"fp":"FY","form":"10-K","filed":"2015-12-15","frame":"CY2013"},{"start":"2013-09-29","end":"2014-03-29","val":341665000,"accn":"0001589526-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-05-19"},{"start":"2013-12-29","end":"2014-03-29","val":195672000,"accn":"0001589526-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-05-19","frame":"CY2014Q1"},{"start":"2013-09-29","end":"2014-06-28","val":581991000,"accn":"0001589526-15-000063","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-08-18"},{"start":"2014-03-30","end":"2014-06-28","val":240326000,"accn":"0001589526-15-000063","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-08-18","frame":"CY2014Q2"},{"start":"2013-09-29","end":"2014-09-27","val":855735000,"accn":"0001589526-15-000089","fy":2015,"fp":"FY","form":"10-K","filed":"2015-12-15"},{"start":"2013-09-29","end":"2014-09-27","val":855735000,"accn":"0001589526-16-000199","fy":2016,"fp":"FY","form":"10-K","filed":"2016-12-15","frame":"CY2014"},{"start":"2014-09-28","end":"2015-01-03","val":165833000,"accn":"0001589526-16-000100","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-02-09","frame":"CY2014Q4"},{"start":"2014-09-28","end":"2015-04-04","val":348851000,"accn":"0001589526-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-05-19"},{"start":"2014-09-28","end":"2015-04-04","val":348851000,"accn":"0001589526-16-000130","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-05-23"},{"start":"2015-01-04","end":"2015-04-04","val":183018000,"accn":"0001589526-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-05-19"},{"start":"2015-01-04","end":"2015-04-04","val":183018000,"accn":"0001589526-16-000130","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-05-23","frame":"CY2015Q1"},{"start":"2014-09-28","end":"2015-07-04","val":611504000,"accn":"0001589526-15-000063","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-08-18"},{"start":"2014-09-28","end":"2015-07-04","val":611504000,"accn":"0001589526-16-000184","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-08-16"},{"start":"2015-04-05","end":"2015-07-04","val":262653000,"accn":"0001589526-15-000063","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-08-18"},{"start":"2015-04-05","end":"2015-07-04","val":262653000,"accn":"0001589526-16-000184","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-08-16","frame":"CY2015Q2"},{"start":"2014-09-28","end":"2015-10-03","val":919128000,"accn":"0001589526-15-000089","fy":2015,"fp":"FY","form":"10-K","filed":"2015-12-15"},{"start":"2014-09-28","end":"2015-10-03","val":919128000,"accn":"0001589526-16-000199","fy":2016,"fp":"FY","form":"10-K","filed":"2016-12-15"},{"start":"2014-09-28","end":"2015-10-03","val":919128000,"accn":"0001589526-17-000057","fy":2017,"fp":"FY","form":"10-K","filed":"2017-12-08","frame":"CY2015"},{"start":"2015-10-04","end":"2016-01-02","val":131333000,"accn":"0001589526-16-000100","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-02-09"},{"start":"2015-10-04","end":"2016-01-02","val":131333000,"accn":"0001589526-17-000009","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-02-09","frame":"CY2015Q4"},{"start":"2015-10-04","end":"2016-04-02","val":322541000,"accn":"0001589526-16-000130","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-05-23"},{"start":"2015-10-04","end":"2016-04-02","val":322541000,"accn":"0001589526-17-000039","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-05-12"},{"start":"2016-01-03","end":"2016-04-02","val":191208000,"accn":"0001589526-16-000130","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-05-23"},{"start":"2016-01-03","end":"2016-04-02","val":191208000,"accn":"0001589526-17-000039","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-05-12","frame":"CY2016Q1"},{"start":"2015-10-04","end":"2016-07-02","val":645596000,"accn":"0001589526-16-000184","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-08-16"},{"start":"2015-10-04","end":"2016-07-02","val":645596000,"accn":"0001589526-17-000049","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-08-04"},{"start":"2016-04-03","end":"2016-07-02","val":323055000,"accn":"0001589526-16-000184","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-08-16"},{"start":"2016-04-03","end":"2016-07-02","val":323055000,"accn":"0001589526-17-000049","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-08-04","frame":"CY2016Q2"},{"start":"2015-10-04","end":"2016-10-01","val":932010000,"accn":"0001589526-16-000199","fy":2016,"fp":"FY","form":"10-K","filed":"2016-12-15"},{"start":"2015-10-04","end":"2016-10-01","val":932010000,"accn":"0001589526-17-000057","fy":2017,"fp":"FY","form":"10-K","filed":"2017-12-08"},{"start":"2015-10-04","end":"2016-10-01","val":932010000,"accn":"0001589526-18-000102","fy":2018,"fp":"FY","form":"10-K","filed":"2018-12-12","frame":"CY2016"},{"start":"2016-10-02","end":"2016-12-31","val":136660000,"accn":"0001589526-17-000009","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-02-09"},{"start":"2016-10-02","end":"2016-12-31","val":136660000,"accn":"0001589526-18-000029","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-02-07","frame":"CY2016Q4"},{"start":"2016-10-02","end":"2017-04-01","val":345311000,"accn":"0001589526-17-000039","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-05-12"},{"start":"2016-10-02","end":"2017-04-01","val":345311000,"accn":"0001589526-18-000045","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-05-10"},{"start":"2017-01-01","end":"2017-04-01","val":208651000,"accn":"0001589526-17-000039","fy":2017,"fp":"Q2","form":"10-Q","filed":"2017-05-12"},{"start":"2017-01-01","end":"2017-04-01","val":208651000,"accn":"0001589526-18-000045","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-05-10","frame":"CY2017Q1"},{"start":"2016-10-02","end":"2017-07-01","val":677915000,"accn":"0001589526-17-000049","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-08-04"},{"start":"2016-10-02","end":"2017-07-01","val":677915000,"accn":"0001589526-18-000059","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-08-08"},{"start":"2017-04-02","end":"2017-07-01","val":332604000,"accn":"0001589526-17-000049","fy":2017,"fp":"Q3","form":"10-Q","filed":"2017-08-04"},{"start":"2017-04-02","end":"2017-07-01","val":332604000,"accn":"0001589526-18-000059","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-08-08","frame":"CY2017Q2"},{"start":"2016-10-02","end":"2017-09-30","val":990602000,"accn":"0001589526-17-000057","fy":2017,"fp":"FY","form":"10-K","filed":"2017-12-08"},{"start":"2016-10-02","end":"2017-09-30","val":990602000,"accn":"0001589526-18-000102","fy":2018,"fp":"FY","form":"10-K","filed":"2018-12-12"},{"start":"2016-10-02","end":"2017-09-30","val":990602000,"accn":"0001589526-19-000054","fy":2019,"fp":"FY","form":"10-K","filed":"2019-12-12","frame":"CY2017"},{"start":"2017-10-01","end":"2017-12-30","val":162549000,"accn":"0001589526-18-000029","fy":2018,"fp":"Q1","form":"10-Q","filed":"2018-02-07","frame":"CY2017Q4"},{"start":"2017-10-01","end":"2018-03-31","val":379177000,"accn":"0001589526-18-000045","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-05-10"},{"start":"2017-12-31","end":"2018-03-31","val":216628000,"accn":"0001589526-18-000045","fy":2018,"fp":"Q2","form":"10-Q","filed":"2018-05-10","frame":"CY2018Q1"},{"start":"2017-10-01","end":"2018-06-30","val":693363000,"accn":"0001589526-18-000059","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-08-08"},{"start":"2018-04-01","end":"2018-06-30","val":314186000,"accn":"0001589526-18-000059","fy":2018,"fp":"Q3","form":"10-Q","filed":"2018-08-08","frame":"CY2018Q2"},{"start":"2017-10-01","end":"2018-09-29","val":1024976000,"accn":"0001589526-18-000102","fy":2018,"fp":"FY","form":"10-K","filed":"2018-12-12"},{"start":"2017-10-01","end":"2018-09-29","val":1024976000,"accn":"0001589526-19-000054","fy":2019,"fp":"FY","form":"10-K","filed":"2019-12-12"},{"start":"2017-10-01","end":"2018-09-29","val":1024976000,"accn":"0001589526-20-000112","fy":2020,"fp":"FY","form":"10-K","filed":"2020-12-17","frame":"CY2018"},{"start":"2018-09-30","end":"2019-09-28","val":1018874000,"accn":"0001589526-19-000054","fy":2019,"fp":"FY","form":"10-K","filed":"2019-12-12"},{"start":"2018-09-30","end":"2019-09-28","val":1018874000,"accn":"0001589526-20-000112","fy":2020,"fp":"FY","form":"10-K","filed":"2020-12-17"},{"start":"2018-09-30","end":"2019-09-28","val":1018874000,"accn":"0001589526-21-000140","fy":2021,"fp":"FY","form":"10-K","filed":"2021-12-15","frame":"CY2019"},{"start":"2019-09-29","end":"2020-10-03","val":879221000,"accn":"0001589526-20-000112","fy":2020,"fp":"FY","form":"10-K","filed":"2020-12-17"},{"start":"2019-09-29","end":"2020-10-03","val":879221000,"accn":"0001589526-21-000140","fy":2021,"fp":"FY","form":"10-K","filed":"2021-12-15"},{"start":"2019-09-29","end":"2020-10-03","val":879221000,"accn":"0001589526-22-000091","fy":2022,"fp":"FY","form":"10-K","filed":"2022-12-12","frame":"CY2020"},{"start":"2020-10-04","end":"2021-10-02","val":683995000,"accn":"0001589526-21-000140","fy":2021,"fp":"FY","form":"10-K","filed":"2021-12-15"},{"start":"2020-10-04","end":"2021-10-02","val":683995000,"accn":"0001589526-22-000091","fy":2022,"fp":"FY","form":"10-K","filed":"2022-12-12"},{"start":"2020-10-04","end":"2021-10-02","val":683995000,"accn":"0001589526-23-000124","fy":2023,"fp":"FY","form":"10-K","filed":"2023-12-11","frame":"CY2021"},{"start":"2021-10-01","end":"2022-09-30","val":800637000,"accn":"0001589526-24-000119","fy":2024,"fp":"FY","form":"10-K","filed":"2024-11-25","frame":"CY2022"},{"start":"2021-10-03","end":"2022-10-01","val":800637000,"accn":"0001589526-22-000091","fy":2022,"fp":"FY","form":"10-K","filed":"2022-12-12"},{"start":"2021-10-03","end":"2022-10-01","val":800637000,"accn":"0001589526-23-000124","fy":2023,"fp":"FY","form":"10-K","filed":"2023-12-11"},{"start":"2022-10-01","end":"2023-09-30","val":1132793000,"accn":"0001589526-24-000119","fy":2024,"fp":"FY","form":"10-K","filed":"2024-11-25"},{"start":"2022-10-01","end":"2023-09-30","val":1132793000,"accn":"0001589526-25-000100","fy":2025,"fp":"FY","form":"10-K","filed":"2025-11-24","frame":"CY2023"},{"start":"2022-10-02","end":"2023-09-30","val":1132793000,"accn":"0001589526-23-000124","fy":2023,"fp":"FY","form":"10-K","filed":"2023-12-11"},{"start":"2023-10-01","end":"2024-09-28","val":1347154000,"accn":"0001589526-24-000119","fy":2024,"fp":"FY","form":"10-K","filed":"2024-11-25"},{"start":"2023-10-01","end":"2024-09-28","val":1347154000,"accn":"0001589526-25-000100","fy":2025,"fp":"FY","form":"10-K","filed":"2025-11-24","frame":"CY2024"},{"start":"2024-09-29","end":"2025-09-27","val":1480099000,"accn":"0001589526-25-000100","fy":2025,"fp":"FY","form":"10-K","filed":"2025-11-24","frame":"CY2025"}]}}