PROPERTY AND EQUIPMENT, NET Property and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Capital Lease Obligations Incurred	$ 557
Payments for (Proceeds from) Leasehold Improvements Funded by Tenant Allowance	2,137
Property, Plant and Equipment, Gross	59,218	55,830
Less: acccumulated depreciation and amortization	47,187	43,841
Property and equipment, net	12,031	11,989
Property Plant and Equipment, Capital Expenditure Not Yet Placed in Service	830	595
Capital lease obligation, current	93	0
Capital lease obligation, non-current	396	0
Computer equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	9,697	8,933
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	5,251	5,438
Capitalized software costs
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	26,234	24,665
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 18,036	$ 16,794