Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012 Faculdade Do Vale DoI Ipojuca September 3, 2012	Sep. 30, 2013 Faculdade Diferencial Integral July 1, 2013
Business Acquisition [Line Items]
Current Assets	$ 4,414	$ 4,699
Property and Equipment	2,897	2,037
Other Long-term Assets	844	167
Intangible Assets	13,571	17,723
Goodwill	16,120	8,238
Total Assets Acquired	37,846	32,864
Liabilities Assumed	5,677	16,801
Net Assets Acquired	$ 32,169	$ 16,063