Property and Equipment - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Loss on disposal of long-lived assets	$ (1,282)	$ (851)	$ (556)
Depreciation expense	12,700	13,000	$ 15,300
APUS Segment
Property, Plant and Equipment [Line Items]
Loss on disposal of long-lived assets	(500)	(400)
Net sales price	$ 700	$ 800