ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES Accrued Expenses and Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Payables and Accruals [Abstract]
Salaries, commissions and benefits	$ 30,051	$ 44,625
Sales, use and income taxes	11,161	13,119
Fees for professional services	1,773	1,635
Rent	2,299	1,806
Deferred revenue	1,623	1,840
Other accruals	9,053	11,223
Total accrued expenses and other liabilities	$ 55,960	$ 74,248