Concentration - Summary of Segment Revenue Derived from Students by Primary Funding Source (Details) - Revenue - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
APUS | DoD tuition assistance programs
Concentration Risk [Line Items]
Concentration risk percentage	47.00%	45.00%	43.00%
APUS | VA education benefits
Concentration Risk [Line Items]
Concentration risk percentage	21.00%	21.00%	22.00%
APUS | Title IV programs
Concentration Risk [Line Items]
Concentration risk percentage	18.00%	20.00%	21.00%
APUS | Cash and other sources
Concentration Risk [Line Items]
Concentration risk percentage	13.00%	14.00%	14.00%
RU Segment | VA education benefits
Concentration Risk [Line Items]
Concentration risk percentage	2.00%	2.00%	2.00%
RU Segment | Title IV programs
Concentration Risk [Line Items]
Concentration risk percentage	74.00%	76.00%	77.00%
RU Segment | Cash and other sources
Concentration Risk [Line Items]
Concentration risk percentage	24.00%	22.00%	21.00%
HCN Segment | VA education benefits
Concentration Risk [Line Items]
Concentration risk percentage	2.00%	2.00%	2.00%
HCN Segment | Title IV programs
Concentration Risk [Line Items]
Concentration risk percentage	80.00%	81.00%	82.00%
HCN Segment | Cash and other sources
Concentration Risk [Line Items]
Concentration risk percentage	18.00%	17.00%	16.00%