Leases - Narrative (Details)	3 Months Ended
	Mar. 31, 2025 USD ($) campus state	Mar. 31, 2024 USD ($) campus	Dec. 31, 2024 USD ($)
Property, Plant and Equipment [Line Items]
Extension term (or more)	1 year
Variable lease payments	$ 0
Lease expense	4,900,000	$ 5,200,000
Cash paid for amounts included in operating lease liabilities	4,700,000	4,800,000
Loss on lease termination	0	2,936,000
Operating lease assets, net	92,649,000		$ 94,776,000
Present value of operating lease liabilities	104,578,000
Present value of operating lease liabilities	$ 382,000
Interest rate	7.00%
Finance lease expense	$ 46,000	27,000
Minnesota
Property, Plant and Equipment [Line Items]
Loss on lease termination		800,000
RU Segment
Property, Plant and Equipment [Line Items]
Number of campuses | campus	20
Number of states | state	6
Operating lease assets, net		5,000,000
Present value of operating lease liabilities		4,200,000
RU Segment | Texas
Property, Plant and Equipment [Line Items]
Lease termination fee		2,200,000
Loss on lease termination		$ 2,100,000
RU Segment | Minnesota
Property, Plant and Equipment [Line Items]
Number of consolidated campuses | campus		2
HCN Segment
Property, Plant and Equipment [Line Items]
Number of campuses | campus	8
Number of states | state	3