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Regulation (Details)
 12 Months Ended
Jan. 08, 2017
item
Oct. 21, 2014
item
Sep. 26, 2014
item
Sep. 11, 2014
item
Aug. 20, 2014
item
Dec. 31, 2018
state
item
Dec. 31, 2014
item
Apr. 29, 2015
USD ($)
Regulation [Line Items]                
Number of debt-to-earnings measures           2    
Failed programs 0              
Number of ineligible years           3 years    
Number of consecutive years program has to fail both metrics to become ineligible           2 years    
Number of consecutive years program has to fail one metric to become ineligible           4 years    
Number of metrics that can't be failed for consecutive years           1    
Minimum                
Regulation [Line Items]                
Average of median annual earning percentage           8.00%    
Average of median discretionary percentage           20.00%    
Maximum                
Regulation [Line Items]                
Average of median annual earning percentage           12.00%    
Average of median discretionary percentage           30.00%    
Capella University                
Regulation [Line Items]                
Number of current programs in the Zone           1    
Strayer University                
Regulation [Line Items]                
Number of current programs in the Zone           2    
Number of conducted compliance reviews           4    
Number of reviews in which no further action was required   1            
Number of on-site reviews conducted     2 1 1      
Number of states in which compliance reviews were conducted | state           3    
Number of reviews also covered compliance with additional agencies             2  
Strayer University | Maximum                
Regulation [Line Items]                
Amount due to department of education | $               $ 500