Significant Accounting Policies Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2012
Equipment | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Equipment | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Furniture | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Furniture | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Software
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Building [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	30 years