Goodwill and Other Intangible Assets - Summary of Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Subject to amortization:
Accumulated Amortization	$ (91,123)	$ (102,044)
Total	1,431	25,429
Not subject to amortization:
Tradenames	1,119,454	1,126,244
Gross Carrying Amount	1,212,008	1,253,717
Net Carrying Amount	1,120,885	1,151,673
Tradenames
Not subject to amortization:
Tradenames	1,119,454	1,126,244
Student rosters
Subject to amortization:
Gross Carrying Amount	67,579	69,540
Accumulated Amortization	(67,579)	(69,253)
Total	$ 0	$ 287
Not subject to amortization:
Weighted Average Amortization Period (Yrs)	0 days	27 days
Other
Subject to amortization:
Gross Carrying Amount	$ 24,975	$ 57,933
Accumulated Amortization	(23,544)	(32,791)
Total	$ 1,431	$ 25,142
Not subject to amortization:
Weighted Average Amortization Period (Yrs)	2 years 1 month 6 days	11 years 2 months 12 days