Property, Plant And Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	$ 35,873	$ 42,310
Less: accumulated depreciation and amortization	31,767	34,349
Net Property, Plant and Equipment	4,106	7,961
Building
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	308	285
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	5,288	5,541
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	8,268	10,174
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	$ 22,009	$ 26,310