PROPERTY AND EQUIPMENT, NET Property and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 63,552	$ 72,256
Less: acccumulated depreciation and amortization	49,730	52,206
Property and equipment, net	13,822	20,050
Construction in Progress, Gross	595	778
Impairment of long-lived assets	1,336	0	0
Capital lease obligation, current	315	467
Capital lease obligation, non-current	9	324
Capital lease obligations incurred	0	61
Noncash or part noncash acquisition, fixed assets acquired		3,949
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,395	10,889
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,379	7,840
Capitalized software costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	26,962	28,877
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 20,816	$ 24,650