Concentration - Summary of Segment Revenue Derived from Students by Primary Funding Source (Details) - Customer Concentration Risk - Revenue	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
APUS Segment | DoD tuition assistance programs
Concentration Risk [Line Items]
Concentration risk percentage	46.00%	41.00%	47.00%	44.00%
APUS Segment | VA education benefits
Concentration Risk [Line Items]
Concentration risk percentage	22.00%	22.00%	21.00%	22.00%
APUS Segment | Title IV programs
Concentration Risk [Line Items]
Concentration risk percentage	18.00%	21.00%	18.00%	20.00%
APUS Segment | Cash and other sources
Concentration Risk [Line Items]
Concentration risk percentage	14.00%	16.00%	14.00%	14.00%
RU Segment | VA education benefits
Concentration Risk [Line Items]
Concentration risk percentage	2.00%	1.00%	2.00%	2.00%
RU Segment | Title IV programs
Concentration Risk [Line Items]
Concentration risk percentage	74.00%	76.00%	74.00%	76.00%
RU Segment | Cash and other sources
Concentration Risk [Line Items]
Concentration risk percentage	24.00%	23.00%	24.00%	22.00%
HCN Segment | VA education benefits
Concentration Risk [Line Items]
Concentration risk percentage	2.00%	2.00%	2.00%	1.00%
HCN Segment | Title IV programs
Concentration Risk [Line Items]
Concentration risk percentage	82.00%	81.00%	80.00%	81.00%
HCN Segment | Cash and other sources
Concentration Risk [Line Items]
Concentration risk percentage	16.00%	17.00%	18.00%	18.00%