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Certain Balance Sheet Components Summary of the Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Summary of Allowance for Doubtful Accounts Activity [Line Items]    
Beginning balance $ 5,949 $ 6,195
Valuation Allowances and Reserves, Adjustments (8) 269
Accounts written-off (1,478) (16)
EffectsOfChangeInExchangeRates 78 (509)
Ending balance $ 4,541 $ 5,939