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Acquisition of New York Code and Design Academy (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jan. 13, 2016
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Intangibles:        
Goodwill   $ 21,042   $ 6,800
Less: contingent consideration   (14,600)    
Cash paid for acquisition, net of cash acquired   $ 1,635  
New York Code and Design Academy, Inc. ("NYCDA") [Member]        
Business Acquisition [Line Items]        
Cash $ 790      
Other assets 1,265      
Intangibles:        
Trade name 5,660      
Goodwill 14,242      
Liabilities assumed (5,032)      
Total assets acquired and liabilities assumed, net 16,925      
Less: contingent consideration (14,500)      
Less: cash acquired (790)      
Cash paid for acquisition, net of cash acquired $ 1,635      
Useful Life, Trade name Indefinite