FIXED ASSETS (Components of Fixed Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant, and Equipment [Line Items]
Property, plant and equipment, gross	$ 78,686	$ 75,768
Accumulated depreciation	(51,835)	(49,739)
Property, plant and equipment, net, total	26,851	26,029
Furniture and fixtures [Member]
Property, Plant, and Equipment [Line Items]
Property, plant and equipment, gross	5,673	5,687
Computer hardware and software [Member]
Property, Plant, and Equipment [Line Items]
Property, plant and equipment, gross	59,035	56,244
Equipment [Member]
Property, Plant, and Equipment [Line Items]
Property, plant and equipment, gross	2,621	2,622
Leasehold improvements [Member]
Property, Plant, and Equipment [Line Items]
Property, plant and equipment, gross	$ 11,357	$ 11,215