Segment Information - Summary of Consolidated Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets:
Total Assets	$ 555,271	$ 615,056
Corporate and Other
Assets:
Total Assets	181,043	141,060
APUS Segment | Operating Segments
Assets:
Total Assets	93,918	113,551
RU Segment | Operating Segments
Assets:
Total Assets	220,819	300,625
HCN Segment | Operating Segments
Assets:
Total Assets	$ 59,491	$ 59,820