Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Reconciliation of weighted-average number of ordinary shares        
Weighted average shares outstanding, basic 32,694,354 33,249,419 32,537,940 32,921,016
Weighted average shares issuable upon exercise/vesting of outstanding share options/RSUs/RSAs 1,486,209 1,107,571 1,099,627 1,504,272
Shares used in computing diluted net income per share 34,180,563 34,356,990 33,637,567 34,425,288
Weighted average anti-dilutive shares excluded from diluted net income per share 39,265 906,850 380,136 916,209
Other Income and Expenses [Abstract]        
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 5,756 $ (1,086) $ 13,398 $ (7,526)
Foreign Currency Transaction Gain (Loss), Realized 2,535 [1] 970 [1] 16,884 [1] (625) [1]
Other income (expense), net $ 8,291 $ (116) $ 30,282 $ (8,151)
[1] (2) We have significant non-functional currency intercompany financing relationships subject to currency exchange rate volatility primarily due to changes in our corporate entity operating structure, effective October 1, 2013, which required us to alter our intercompany transactional and financing activities. The net currency related gains for the three and nine months ended March 31, 2015 are substantially driven by this intercompany activity.