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Note 1. Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 12 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2013 Customer 1 [Member] Customer Concentration Risk [Member] Sales [Member] | Dec. 31, 2012 Customer 1 [Member] Customer Concentration Risk [Member] Sales [Member] | Dec. 31, 2011 Customer 1 [Member] Customer Concentration Risk [Member] Sales [Member] | Dec. 31, 2011 Customer 2 [Member] Customer Concentration Risk [Member] Sales [Member] | Dec. 31, 2013 Insurance Claims [Member] | Dec. 31, 2013 Tractors [Member] | Dec. 31, 2013 Trailers [Member] | Dec. 31, 2013 Service and other equipment [Member] Minimum [Member] | Dec. 31, 2013 Service and other equipment [Member] Maximum [Member] | Dec. 31, 2013 Building and Building Improvements [Member] Minimum [Member] | Dec. 31, 2013 Building and Building Improvements [Member] Maximum [Member] | Dec. 31, 2013 Tires In Service [Member] | Dec. 31, 2013 Geographic Concentration Risk [Member] UNITED STATES Sales [Member] | Mar. 27, 2013 MWL [Member]
Note 1. Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 45.00%
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  | 5 years | 7 years | 3 years | 15 years | 20 years | 40 years | 24 months |  |
Replacement of Equipment, Period After Purchase |  |  |  |  |  |  | 4 years 6 months | 5 years 6 months |  |  |  |  |  |  |
Property, Plant and Equipment, Salvage Value, Percentage |  |  |  |  |  |  | 25.00% | 35.00% |  |  |  |  |  |  |
Letters of Credit Outstanding, Amount (in Dollars) | $ 8.3 |  |  |  |  | $ 8.3 |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  | 8.00% | 9.00% | 11.00% | 10.00% |  |  |  |  |  |  |  |  | 99.00% |
Number of Operating Segments | 7 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Reportable Segments | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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