Nature of Operations and Summary of Significant Accounting Policies Fixed Assets (Details)	12 Months Ended
	Dec. 31, 2012
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	.2
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	.3
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	30
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	Shorter of useful life or lease term
Capital Lease Obligations [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives	Lease term which approximates its useful life