Quarterly report pursuant to Section 13 or 15(d)

Financial Statement Components - Accumulated Other Comprehensive Income (Loss) (Details)

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Financial Statement Components - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss)    
Stockholders' equity $ 1,463,956 $ 1,326,417
Currency Translation Adjustments    
Accumulated Other Comprehensive Income (Loss)    
Stockholders' equity (29,599) (30,654)
Unrealized Gains (Losses) on Available-for-Sale Securities    
Accumulated Other Comprehensive Income (Loss)    
Stockholders' equity (3,272) (3,869)
Unrealized Gains (Losses) on Cash Flow Hedges    
Accumulated Other Comprehensive Income (Loss)    
Stockholders' equity 4,145 5,221
Unrealized Gains (Losses) on Defined Benefit Plans    
Accumulated Other Comprehensive Income (Loss)    
Stockholders' equity (22,055) (22,021)
Accumulated Other Comprehensive Income (Loss)    
Accumulated Other Comprehensive Income (Loss)    
Stockholders' equity $ (50,781) $ (51,323)