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INTANGIBLE ASSETS (Summary of Goodwill Balances by Reporting Unit) (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Jun. 30, 2019
Sep. 30, 2018
Goodwill [Line Items]      
Goodwill $ 686,992 $ 687,256 $ 627,239
Chamberlain University [Member]      
Goodwill [Line Items]      
Goodwill 4,716 4,716 4,716
AUC [Member]      
Goodwill [Line Items]      
Goodwill 68,321 68,321 68,321
RUSM and RUSVM [Member]      
Goodwill [Line Items]      
Goodwill 237,173 237,173 237,173
Financial Services      
Goodwill [Line Items]      
Goodwill $ 376,782 $ 377,046 $ 317,029