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CONSOLIDATED STATEMENT OF STOCKHOLDERS' DEFICIT - USD ($)
shares in Thousands, $ in Thousands
Total
Additional Paid-In Capital
Accumulated Deficit
Comprehensive Income
Class A Common Stock
Class A Common Stock
Common Stock
Class B Common Stock
Class B Common Stock
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Cumulative effect of new accounting principle     $ 18 $ (18)        
Beginning balance at Dec. 31, 2017 $ (37,862) $ 356,638 (395,107) 184   $ 413   $ 10
Beginning balance (in shares) at Dec. 31, 2017         41,298 41,298 988 988
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 20,096   20,096          
Other comprehensive income 1,120     1,120        
Issuances of Class A common stock 743 738       $ 5    
Issuances of Class A common stock (in shares)           484    
Stock-based compensation 6,366 6,366            
Issuance of Class A common stock - acquisition 4,258 4,257       $ 1    
Issuance of Class A common stock - acquisition (in shares)           150    
Ending balance at Sep. 30, 2018 $ (5,279) $ 367,999 $ (374,993) $ 1,286   $ 419   $ 10
Ending balance (in shares) at Sep. 30, 2018         41,932 41,932 988 988