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Recent Accounting Pronouncements (Property and Equipment) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013
Property, Plant and Equipment [Line Items] |
Unamortized amount of capitalized software | $ 4.7
Buildings and leasehold improvements [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 2 years
Buildings and leasehold improvements [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 30 years
Machinery, equipment and rental tools [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 7 years
Machinery, equipment and rental tools [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 10 years
Furniture and fixtures [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 3 years
Transportation equipment [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 2 years
Transportation equipment [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 5 years
Computer Equipment and Software [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 3 years
Computer Equipment and Software [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 7 years
Computer software [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 3 years
Computer software [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment, useful life | 7 years

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- Definition The gross amount of capitalized computer software costs as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
Name: | us-gaap_CapitalizedComputerSoftwareGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition 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. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration