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Significant Accounting Policies (Details) (USD $) | 6 Months Ended |  |  | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 2013 Acquisitions Land segment item | Sep. 30, 2013 2012 Acquisitions Land segment Adjustment | Sep. 30, 2013 2012 Acquisitions Land segment Reclassification | Sep. 30, 2013 2012 Acquisitions Aviation segment Adjustment | Sep. 30, 2013 2012 Acquisitions Aviation segment Reclassification | Sep. 30, 2013 2012 Acquisitions Marine segment Adjustment
Significant Accounting Policies |  |  |  |  |  |  |  |  |
Incorrect cash flow presentation related to an acquisition payment | $ 17,700,000 |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |
Goodwill |  | 477,258,000 | 470,506,000 | 9,600,000 | (2,000,000) | (6,500,000) |  | 6,500,000 |
Number of businesses acquired |  |  |  | 2 |  |  |  |  |
Reclassification to identifiable intangible assets |  |  |  |  | 3,300,000 |  |  |  |
Increase (decrease) in acquired net assets |  |  |  |  | (900,000) |  |  |  |
Increase in assumed liabilities |  |  |  |  | 400,000 |  |  |  |
Reductions in goodwill due to foreign currency translation adjustments |  |  |  |  |  |  | $ (300,000) |  | $ (500,000)

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- Definition The amount of net tangible asset recognized, as of the acquisition date. + References No definition available. + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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