Summary of Significant Accounting Policies - Summary of Revenues Disaggregated by Nature of Transfer of Services (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenues			$ 613,675
Scholarships			(101,176)
Net Revenues	$ 213,247	$ 177,548	512,499	$ 844,096	$ 778,643	$ 845,501
Tuition Revenues
Disaggregation of Revenue [Line Items]
Total revenues			522,430
Ancillary Revenues
Disaggregation of Revenue [Line Items]
Total revenues			$ 91,245