Financial Statement Detail (Details 2) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Summary of prepaid expenses and other assets
Prepaid contract expense	$ 10,318,000	$ 9,798,000
Deferred commissions	6,411,000	7,370,000
Prepaid income tax	5,854,000
Debt issuance costs	1,417,000
Other	6,917,000	8,700,000
Total prepaid expenses and other	30,917,000	25,868,000
Summary of other assets
Prepaid contract expense, long-term	4,409,000	3,598,000
Debt issuance costs	5,254,000	1,146,000
Long-term deferred commissions	3,452,000	3,909,000
Deposits	2,610,000	2,555,000
Other	299,000	1,786,000
Total other assets	16,024,000	12,994,000
Restricted cash balance	1,300,000	1,300,000
Summary of accrued liabilities
Salaries and benefits payable	20,569,000	23,365,000
Deferred rent, current portion	1,868,000	1,353,000
Accrued restructuring, current portion	245,000	3,142,000
Other	13,031,000	9,236,000
Total accrued liabilities	35,713,000	37,096,000
Summary of other long-term liabilities
Deferred rent	9,397,000	10,502,000
Long-term deferred tax liability	1,656,000	2,141,000
Other	503,000	496,000
Total other long-term liabilities	$ 11,556,000	$ 13,139,000