Acquisitions (Details)
$ in Thousands, € in Millions, BRL in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2015
EUR (€)
Jun. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2014
BRL
May 31, 2016
USD ($)
May 31, 2015
USD ($)
May 31, 2016
USD ($)
May 31, 2015
USD ($)
May 31, 2016
BRL
May 31, 2016
EUR (€)
Dec. 10, 2015
USD ($)
Aug. 31, 2015
USD ($)
Jun. 11, 2015
USD ($)
Dec. 04, 2014
USD ($)
Purchase price allocation [Line Items]                              
Fair value of contingent consideration             $ 0   $ 0            
Goodwill           $ 265,765   $ 265,765         $ 247,190    
Cash paid for acquisition, net of cash acquired               101,196 $ 21,166            
Career Partner GmbH [Member]                              
Purchase price allocation [Line Items]                              
Initial cash payment $ 105,000 € 96                          
Contingent consideration maximum           12,300   12,300     € 11        
Fair value of contingent consideration $ (10,700)         0   (10,717)              
Purchase price reduction           3,500                  
Transaction costs           2,000   2,000              
Property and equipment                       $ 13,682      
Goodwill                       92,840      
Other assets                       2,092      
Deferred revenue                       28,380      
Capital lease obligations                       22,734      
Other liabilities                       (20,340)      
Total assets acquired and liabilities assumed, net                       112,980      
Cash acquired                       (4,580)      
Finite-lived intangible assets, weighted average useful life 5 years 5 years                          
Career Partner GmbH [Member] | Trademarks [Member]                              
Purchase price allocation [Line Items]                              
Indefinite-lived intangibles                       30,469      
Career Partner GmbH [Member] | Accreditations [Member]                              
Purchase price allocation [Line Items]                              
Indefinite-lived intangibles                       27,948      
Career Partner GmbH [Member] | Student and customer relationships [Member]                              
Purchase price allocation [Line Items]                              
Finite-lived Intangibles                       9,097      
Finite-lived intangible asset, useful life 5 years 5 years                          
Career Partner GmbH [Member] | Curriculum [Member]                              
Purchase price allocation [Line Items]                              
Finite-lived Intangibles                       $ 3,726      
Finite-lived intangible asset, useful life 5 years 5 years                          
The Iron Yard [Member]                              
Purchase price allocation [Line Items]                              
Percentage of shares acquired                           62.00%  
Initial cash payment     $ 15,900                        
Tangible assets (net of acquired liabilities)                           $ 5,262  
Indefinite-lived intangibles                           0  
Finite-lived Intangibles                           4,690  
Goodwill                           15,888  
Total assets acquired and liabilities assumed, net                           25,840  
Fair value of redeemable noncontrolling interests                           (9,900)  
Total fair value of consideration transferred                           15,940  
Cash acquired                           $ (5,401)  
Cash paid for acquisition, net of cash acquired     $ 10,539                        
FAEL [Member]                              
Purchase price allocation [Line Items]                              
Percentage of shares acquired                             75.00%
Initial cash payment       $ 28,900 BRL 73.8                    
Contingent consideration maximum           $ 9,500   $ 9,500   BRL 34.0          
Tangible assets (net of acquired liabilities)                             $ (2,807)
Indefinite-lived intangibles                             15,163
Finite-lived Intangibles                             5,394
Goodwill                             14,538
Total assets acquired and liabilities assumed, net                             32,288
Fair value of redeemable noncontrolling interests                             (3,437)
Total fair value of consideration transferred                             28,851
Cash acquired                             $ (7,685)
Cash paid for acquisition, net of cash acquired       $ 21,166