Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Stockholders' Equity (Unaudited)

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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2018 - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income
Accumulated Deficit
Treasury Stock
Beginning Balance (in shares) at Dec. 31, 2017   87,153       3,973
Beginning Balance at Dec. 31, 2017 $ 501,875 $ 87 $ 637,851 $ 243 $ (75,046) $ (61,260)
Cumulative effect of adoption of ASU 2014-09 at Dec. 31, 2017 2,221       2,221  
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Public offering of common stock, net of $16,399 of offering costs (in shares)   8,050        
Public offering of common stock, net of $17,056 of offering costs 441,794 $ 8 441,786      
Issuance of common stock at closing in connection with our acquisitions (in shares)   1,361        
Issuance of common stock in connection with our acquisitions 75,150 $ 2 75,148      
Stock option exercises (in shares)   (25)       (472)
Stock option exercises 9,953   4,389     $ 5,564
Issuance of restricted stock (in shares)           (1,597)
Issuance of restricted stock 0   (7,824)     $ 7,824
Treasury stock purchase, at cost (in shares)           660
Treasury stock purchases, at cost (22,122)   325     $ (22,447)
Stock-based compensation 38,435   38,435      
Interest rate swap agreements 410     410    
Foreign currency translation (33)     (33)    
Reclassification of realized gain on cash flow hedge to earnings, net of tax (413)     (413)    
Net income 28,453       28,453  
Ending Balance (in shares) at Sep. 30, 2018   96,589       2,564
Ending Balance at Sep. 30, 2018 $ 1,075,723 $ 97 $ 1,190,110 $ 207 $ (44,372) $ (70,319)