Certain Balance Sheet Components Summary of the Allowance for Doubtful Accounts (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Summary of Allowance for Doubtful Accounts Activity [Line Items]
Beginning balance	$ 8,758	$ 6,144	$ 8,368	$ 7,372
Valuation Allowances and Reserves, Adjustments	(795)	1,075	(189)	171
Accounts written-off	(558)	(198)	(790)	(303)
EffectsOfChangeInExchangeRates	(50)	(73)	(34)	(292)
Ending balance	$ 7,355	$ 6,948	$ 7,355	$ 6,948