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Long-Lived Assets (Details) (USD $) In Thousands, unless otherwise specified |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Land [Member] | Dec. 31, 2012 Land [Member] | Dec. 31, 2013 Buildings And Improvements [Member] | Dec. 31, 2012 Buildings And Improvements [Member] | Dec. 31, 2013 Automated Storage And Retrieval Equipment [Member] | Dec. 31, 2012 Automated Storage And Retrieval Equipment [Member] | Dec. 31, 2013 Equipment And Shelving [Member] | Dec. 31, 2012 Equipment And Shelving [Member] | Dec. 31, 2013 Transportation Equipment [Member] | Dec. 31, 2012 Transportation Equipment [Member] | Dec. 31, 2013 Construction In Progress [Member] | Dec. 31, 2012 Construction In Progress [Member] | Dec. 31, 2013 Minimum [Member] Buildings And Improvements [Member] | Dec. 31, 2013 Minimum [Member] Automated Storage And Retrieval Equipment [Member] | Dec. 31, 2013 Minimum [Member] Equipment And Shelving [Member] | Dec. 31, 2013 Minimum [Member] Transportation Equipment [Member] | Dec. 31, 2013 Maximum [Member] Buildings And Improvements [Member] | Dec. 31, 2013 Maximum [Member] Automated Storage And Retrieval Equipment [Member] | Dec. 31, 2013 Maximum [Member] Equipment And Shelving [Member] | Dec. 31, 2013 Maximum [Member] Transportation Equipment [Member]
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross property and equipment | $ 1,019,902 | $ 840,078 | $ 36,644 | $ 31,831 | $ 216,852 | $ 200,439 | $ 98,474 | $ 69,404 | $ 462,224 | $ 398,240 | $ 57,536 | $ 52,093 | $ 148,172 | $ 88,071 |  |  |  |  |  |  |  |
Less accumulated depreciation | (365,052) | (323,651) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net property and equipment | $ 654,850 | $ 516,427 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciable life in years |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 years | 5 years | 3 years | 3 years | 40 years | 30 years | 10 years | 5 years

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 14 -Article 5 + Details
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
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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
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