Leases - Narrative (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) campus state	Mar. 31, 2022 USD ($)
Property, Plant and Equipment [Line Items]
Extension term	1 year
Variable lease payments	$ 0
Lease expense	5,300,000	$ 5,000,000
Cash paid for amounts included in operating lease liabilities	4,900,000	4,800,000
Present value of operating lease liabilities	$ 192,000
Interest rate	3.75%
Finance lease expense	$ 30,000.00	$ 30,000.00
RU Segment
Property, Plant and Equipment [Line Items]
Number of campuses | campus	22
Number of states | state	6
HCN Segment | Ohio
Property, Plant and Equipment [Line Items]
Number of campuses | campus	8
Number of states | state	3