Capitalized Software, Furniture, Equipment and Leasehold Improvements (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Accumulated depreciation and amortization	$ (30,470)	$ (31,264)
Total capitalized software, furniture, equipment and leasehold improvements, net of accumulated depreciation and amortization	14,460	12,545
Software development costs [Member]
Property, Plant and Equipment [Line Items]
Total capitalized software, furniture, equipment and leasehold improvements, net of accumulated depreciation and amortization	24,440	21,195
Computer hardware and related software [Member]
Property, Plant and Equipment [Line Items]
Total capitalized software, furniture, equipment and leasehold improvements, net of accumulated depreciation and amortization	11,126	13,534
Office hardware [Member]
Property, Plant and Equipment [Line Items]
Total capitalized software, furniture, equipment and leasehold improvements, net of accumulated depreciation and amortization	1,832	1,630
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total capitalized software, furniture, equipment and leasehold improvements, net of accumulated depreciation and amortization	1,446	1,449
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total capitalized software, furniture, equipment and leasehold improvements, net of accumulated depreciation and amortization	4,667	4,582
Computer hardware under capital lease [Member]
Property, Plant and Equipment [Line Items]
Total capitalized software, furniture, equipment and leasehold improvements, net of accumulated depreciation and amortization	$ 1,419	$ 1,419