INCOME TAX PROVISION Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets
Net operating loss	$ 7,231	$ 212
Accrued compensation	2,783	1,108
Stock based compensation	2,777
Tenant Improvement allowance	3,097
Other deferred tax assets	861	2,201
Tax credits	8	20
Deferred tax assets	16,757	3,541
Deferred Tax Liabilities
Deferred revenue	(1,290)	(1,404)
Prepaid expenses	(139)	(187)
Depreciation	(6,138)	(1,958)
Intangible assets amortization	(23,562)	(15,472)
Deferred tax liabilities	(31,129)	(19,021)
Net deferred liabilities	$ (14,372)	$ (15,480)