Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 8,686	$ 7,921	$ 8,613
Charged to cost and expenses	845	2,261	219
Write-offs (recoveries) of doubtful accounts	362	1,496	911
Balance at end of period	9,169	8,686	7,921
Student Loan [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	19,448	21,317	19,361
Charged to cost and expenses	18,659	16,529	19,834
Write-offs (recoveries) of doubtful accounts	15,196	18,398	17,878
Balance at end of period	$ 22,911	$ 19,448	$ 21,317