Leases - Narrative (Details)	1 Months Ended	3 Months Ended		12 Months Ended
	May 31, 2024 campus	Jun. 30, 2024 USD ($) campus	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) state campus	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Property, Plant and Equipment [Line Items]
Extension term				1 year
Variable lease payment				$ 0
Lease expense				18,900,000	$ 20,700,000	$ 19,900,000
Cash paid for amounts included in operating lease liabilities				18,500,000	20,200,000	19,500,000
Loss on lease termination				3,715,000	0	0
Present value of operating lease liabilities				$ 428,000
Interest rate				7.00%
Finance lease expense				$ 200,000	$ 100,000	$ 100,000
RU Segment
Property, Plant and Equipment [Line Items]
Number of campuses | campus				20
Number of states | state				6
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]
Lease termination fee		$ 1,200,000
Number of consolidated campuses | campus		2
RU Segment | WISCONSIN
Property, Plant and Equipment [Line Items]
Number of campuses to be closed | campus	2
Lease impairment		$ 400,000
HCN Segment
Property, Plant and Equipment [Line Items]
Number of campuses | campus				8
Number of states | state				3