Nature of Operations and Summary of Significant Accounting Policies Fixed Assets (Details)
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12 Months Ended |
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Dec. 31, 2012
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|
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 |