Description of Business and Summary of Significant Accounting Policies (Fixed Assets) (Details) (Details)	12 Months Ended
Dec. 31, 2012
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	5 years
Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	7 years
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	30 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration