Certain Balance Sheet Components Summary of the Allowance for Doubtful Accounts (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Summary of Allowance for Doubtful Accounts Activity [Line Items]
Beginning balance	$ 6,948	$ 5,381	$ 7,372	$ 6,049
Provision (release) of doubtful accounts, net	1,290	(124)	1,461	(414)
Accounts written-off	(164)	(53)	(467)	(314)
Effect of change in exchange rates	153	151	(139)	34
Ending balance	$ 8,227	$ 5,355	$ 8,227	$ 5,355