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BUSINESS COMBINATIONS - Additional Information (Detail) $ in Millions			3 Months Ended
	Feb. 05, 2018 USD ($)	Nov. 01, 2017 USD ($) Number	Mar. 31, 2018 USD ($)
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets		$ 0.4
Sao Judas Tadeu [Member]
Business Acquisition [Line Items]
Number Of Students In Degree Programs \| Number		2,700
Payments to Acquire Businesses, Gross		$ 1.0
Business Combination, Consideration Transferred		$ 6.0
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Business Combination, Contingent Consideration		$ 5.0
Sao Judas Tadeu [Member] \| Trade Name [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets		$ 0.2
Edupristine [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 3.2		$ 1.3
Business Acquisition, Percentage of Voting Interests Acquired	64.00%		69.00%
Equity Method Investment, Ownership Percentage	36.00%
Equity Method Investments, Fair Value Disclosure	$ 4.1
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value	4.1
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee	1.2
Edupristine [Member] \| Trade Name [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	$ 1.4