v3.19.3.a.u2
Goodwill and Amortizable Intangible Assets - Goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Goodwill [Line Items]              
Goodwill       $ 61,852 $ 61,852 $ 71,988  
Goodwill recognized in connection with business combination         425,346    
Impairment charge (current and cumulative) $ 0 $ (70,379) $ 0 0 (70,379) 0 $ 0
Foreign currency translation adjustments         1,531 (10,136)  
Goodwill 418,350       418,350 61,852 71,988
Graduate Program Segment              
Goodwill [Line Items]              
Goodwill       0 0 0  
Goodwill recognized in connection with business combination         0    
Impairment charge (current and cumulative)         0    
Foreign currency translation adjustments         0 0  
Goodwill 0       0 0 0
Alternative Credential Segment              
Goodwill [Line Items]              
Goodwill       $ 61,852 61,852 71,988  
Goodwill recognized in connection with business combination         425,346    
Impairment charge (current and cumulative)         (70,379)    
Foreign currency translation adjustments         1,531 (10,136)  
Goodwill $ 418,350       $ 418,350 $ 61,852 $ 71,988