Concentration - Summary of Segment Revenue Derived from Students by Primary Funding Source (Details) - Customer Concentration Risk - Revenue	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
APUS Segment | DoD tuition assistance programs
Concentration Risk [Line Items]
Concentration risk percentage	48.00%	45.00%
APUS Segment | VA education benefits
Concentration Risk [Line Items]
Concentration risk percentage	21.00%	21.00%
APUS Segment | Title IV programs
Concentration Risk [Line Items]
Concentration risk percentage	18.00%	20.00%
APUS Segment | Cash and other sources
Concentration Risk [Line Items]
Concentration risk percentage	13.00%	14.00%
RU Segment | VA education benefits
Concentration Risk [Line Items]
Concentration risk percentage	2.00%	2.00%
RU Segment | Title IV programs
Concentration Risk [Line Items]
Concentration risk percentage	74.00%	76.00%
RU Segment | Cash and other sources
Concentration Risk [Line Items]
Concentration risk percentage	24.00%	22.00%
HCN Segment | VA education benefits
Concentration Risk [Line Items]
Concentration risk percentage	2.00%	1.00%
HCN Segment | Title IV programs
Concentration Risk [Line Items]
Concentration risk percentage	79.00%	81.00%
HCN Segment | Cash and other sources
Concentration Risk [Line Items]
Concentration risk percentage	19.00%	18.00%