Balance Sheet Account Details (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Accrued expenses and other current liabilities
Taxes payable	$ 2,734	$ 7,399
Bonuses and commissions	6,284	6,080
Accrued compensation	7,674	3,570
Accrued third-party professional services	2,165	1,919
Other employee expenses	2,404	1,809
Other	8,397	4,831
Total accrued expenses and other current liabilities	$ 29,658	$ 25,608