PROPERTY AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 42,047	$ 60,754
Less: acccumulated depreciation and amortization	34,119	50,914
Property and equipment, net	7,928	9,840
Construction in Progress, Gross	513	1,006
Impairment of long-lived assets	0	662	$ 1,336
Capital lease obligation, current	62	77
Capital lease obligation, non-current	229	348
Capital lease obligations incurred	0	557
Noncash or part noncash acquisition, fixed assets acquired		1,221
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,911	8,806
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,668	5,352
Capitalized software costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	17,946	25,228
Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 15,522	$ 21,368