Business Segments (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($) segment	Dec. 31, 2025 USD ($)
Business Segments [Line Items]
Number of reportable segments | segment	7
Accounts Receivable, Current	$ 520,482	$ 576,754
Purdue University Global [Member] | Education [Member] | Higher Education [Member]
Business Segments [Line Items]
Accounts Receivable	72,900
Kaplan University Transaction [Member] | Purdue University Global [Member] | Education [Member] | Higher Education [Member]
Business Segments [Line Items]
Accounts Receivable, Current	$ 20,000