XML 67 R56.htm IDEA: XBRL DOCUMENT v3.19.2
Equity - Statement of Stockholders' Equity (Details) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period $ 421,798 $ 437,775 $ 827,957 $ 840,093 $ 437,775 $ 840,093
Net loss (15,565) (18,530) (237,634) (15,827) (34,095) (253,461)
Other comprehensive income, net of tax 20 38 (24) 24    
Share-based compensation expense 4,588 3,157 4,904 4,537    
Net issuance under employee stock plans 185 (642) (408) (426)    
Purchases of common stock     (865) (444)    
Balance at the end of the period 411,026 421,798 593,930 827,957 411,026 593,930
Common Stock            
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period $ 487 $ 485 $ 487 $ 482 $ 485 $ 482
Balance (in shares) 48,675 48,547 48,691 48,229 48,547 48,229
Net issuance under employee stock plans $ 3 $ 2   $ 5    
Net issuance under employee stock plans (in shares) 296 128 43 462    
Balance at the end of the period $ 490 $ 487 $ 487 $ 487 $ 490 $ 487
Balance (in shares) 48,971 48,675 48,734 48,691 48,971 48,734
Treasury Stock            
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period   $ (5,872)   $ (1,284) $ (5,872) $ (1,284)
Balance (in shares)   523   85 523 85
Net issuance under employee stock plans   $ 5,872 $ 865 $ 1,728    
Net issuance under employee stock plans (in shares)   (523) (57) (115)    
Purchases of common stock     $ (865) $ (444)    
Purchase of common stock (in shares)     57 30    
Additional Paid-in Capital            
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period $ 1,058,179 $ 1,061,325 $ 1,054,331 $ 1,051,953 $ 1,061,325 $ 1,051,953
Share-based compensation expense 4,588 3,157 4,904 4,537    
Net issuance under employee stock plans 182 (6,303) (1,273) (2,159)    
Balance at the end of the period 1,062,949 1,058,179 1,057,962 1,054,331 1,062,949 1,057,962
Accumulated Deficit            
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period (638,726) (619,983) (228,697) (212,870) (619,983) (212,870)
Net loss (15,565) (18,530) (237,634) (15,827)    
Net issuance under employee stock plans   (213)        
Balance at the end of the period (654,291) (638,726) (466,331) (228,697) (654,291) (466,331)
Accumulated Other Comprehensive Income            
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period 1,858 1,820 1,836 1,812 1,820 1,812
Other comprehensive income, net of tax 20 38 (24) 24    
Balance at the end of the period $ 1,878 $ 1,858 $ 1,812 $ 1,836 $ 1,878 $ 1,812