Balance Sheet Account Details (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accrued expenses and other current liabilities
Taxes payable	$ 3,376	$ 7,399
Bonuses and commissions	6,710	6,080
Accrued compensation	5,895	3,570
Accrued third-party professional services	2,141	1,919
Other employee expenses	5,447	1,809
Current portion of facility exit obligation	597
Other	7,872	4,831
Total accrued expenses and other current liabilities	$ 32,038	$ 25,608