Business Combinations - Revenue and Net Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Revenues	$ 1,065,480	$ 1,131,686	$ 1,027,653
Net income	$ 46,670	$ 55,087	86,268
Torrens University and Related Assets in Australia and New Zealand (ANZ)
Business Acquisition [Line Items]
Revenues			23,400
Net income			$ (10,500)