{"cik":1013934,"taxonomy":"us-gaap","tag":"LongTermDebt","label":"Long-term Debt","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","entityName":"Strategic Education, Inc.","units":{"USD":[{"end":"2011-12-31","val":117500000,"accn":"0001193125-12-070612","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-21","frame":"CY2011Q4I"},{"end":"2012-03-31","val":92500000,"accn":"0001193125-12-196460","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-30","frame":"CY2012Q1I"},{"end":"2012-06-30","val":85000000,"accn":"0001213900-12-004101","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-07-31","frame":"CY2012Q2I"},{"end":"2012-09-30","val":77500000,"accn":"0001213900-12-006002","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-09","frame":"CY2012Q3I"},{"end":"2012-12-31","val":125000000,"accn":"0001213900-13-000794","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-19","frame":"CY2012Q4I"},{"end":"2013-03-31","val":124219000,"accn":"0001213900-13-002186","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-03","frame":"CY2013Q1I"},{"end":"2013-06-30","val":123438000,"accn":"0001213900-13-003810","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-07-26","frame":"CY2013Q2I"},{"end":"2013-09-30","val":122656000,"accn":"0001213900-13-006030","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-11-01","frame":"CY2013Q3I"},{"end":"2013-12-31","val":121875000,"accn":"0001213900-14-001156","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-26","frame":"CY2013Q4I"},{"end":"2014-03-31","val":121094000,"accn":"0001213900-14-003059","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-09","frame":"CY2014Q1I"},{"end":"2014-06-30","val":120313000,"accn":"0001213900-14-005298","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-01","frame":"CY2014Q2I"},{"end":"2014-09-30","val":119532000,"accn":"0001213900-14-007691","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-03","frame":"CY2014Q3I"},{"end":"2014-12-31","val":118750000,"accn":"0001213900-15-001283","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-20"},{"end":"2014-12-31","val":118800000,"accn":"0001213900-16-011094","fy":2015,"fp":"FY","form":"10-K","filed":"2016-02-19","frame":"CY2014Q4I"},{"end":"2015-03-31","val":117188000,"accn":"0001213900-15-003407","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-08","frame":"CY2015Q1I"},{"end":"2015-06-30","val":115625000,"accn":"0001213900-15-005560","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-07-30","frame":"CY2015Q2I"}]}}