{"cik":1159281,"taxonomy":"us-gaap","tag":"OperatingLeaseLiabilityCurrent","label":"Operating Lease, Liability, Current","description":"Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.","entityName":"AlerisLife Inc.","units":{"USD":[{"end":"2019-03-31","val":149381000,"accn":"0001159281-19-000017","fy":2019,"fp":"Q1","form":"10-Q","filed":"2019-05-08","frame":"CY2019Q1I"},{"end":"2019-06-30","val":94368000,"accn":"0001159281-19-000028","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-07","frame":"CY2019Q2I"},{"end":"2019-09-30","val":94432000,"accn":"0001159281-19-000038","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-06","frame":"CY2019Q3I"},{"end":"2019-12-31","val":2872000,"accn":"0001159281-20-000016","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-02"},{"end":"2019-12-31","val":2872000,"accn":"0001159281-20-000033","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07"},{"end":"2019-12-31","val":2872000,"accn":"0001159281-20-000046","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-06"},{"end":"2019-12-31","val":2872000,"accn":"0001159281-20-000056","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05"},{"end":"2019-12-31","val":2872000,"accn":"0001159281-21-000019","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-25","frame":"CY2019Q4I"},{"end":"2020-03-31","val":2925000,"accn":"0001159281-20-000033","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-07","frame":"CY2020Q1I"},{"end":"2020-06-30","val":2977000,"accn":"0001159281-20-000046","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-06","frame":"CY2020Q2I"},{"end":"2020-09-30","val":2773000,"accn":"0001159281-20-000056","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-05","frame":"CY2020Q3I"},{"end":"2020-12-31","val":2567000,"accn":"0001159281-21-000019","fy":2020,"fp":"FY","form":"10-K","filed":"2021-02-25"},{"end":"2020-12-31","val":2567000,"accn":"0001159281-21-000039","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-05"},{"end":"2020-12-31","val":2567000,"accn":"0001159281-21-000063","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-04"},{"end":"2020-12-31","val":2567000,"accn":"0001159281-21-000067","fy":2021,"fp":"Q2","form":"10-Q/A","filed":"2021-08-05"},{"end":"2020-12-31","val":2567000,"accn":"0001159281-21-000094","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-03"},{"end":"2020-12-31","val":2567000,"accn":"0001159281-22-000026","fy":2021,"fp":"FY","form":"10-K","filed":"2022-02-24","frame":"CY2020Q4I"},{"end":"2021-03-31","val":2230000,"accn":"0001159281-21-000039","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-05","frame":"CY2021Q1I"},{"end":"2021-06-30","val":2201000,"accn":"0001159281-21-000063","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-04"},{"end":"2021-06-30","val":2201000,"accn":"0001159281-21-000067","fy":2021,"fp":"Q2","form":"10-Q/A","filed":"2021-08-05","frame":"CY2021Q2I"},{"end":"2021-09-30","val":417000,"accn":"0001159281-21-000094","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-03","frame":"CY2021Q3I"},{"end":"2021-12-31","val":699000,"accn":"0001159281-22-000026","fy":2021,"fp":"FY","form":"10-K","filed":"2022-02-24"},{"end":"2021-12-31","val":699000,"accn":"0001159281-22-000049","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-03"},{"end":"2021-12-31","val":699000,"accn":"0001159281-22-000075","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-03"},{"end":"2021-12-31","val":699000,"accn":"0001159281-22-000092","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-02","frame":"CY2021Q4I"},{"end":"2022-03-31","val":476000,"accn":"0001159281-22-000049","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-03","frame":"CY2022Q1I"},{"end":"2022-06-30","val":419000,"accn":"0001159281-22-000075","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-03","frame":"CY2022Q2I"},{"end":"2022-09-30","val":501000,"accn":"0001159281-22-000092","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-02","frame":"CY2022Q3I"}]}}