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Goodwill and Identifiable Intangible Assets (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Identifiable intangible assets |  |  |
Gross Carrying Amount | $ 241,662,000 | $ 226,502,000 |
Accumulated Amortization | 95,632,000 | 73,236,000 |
Net | 146,030,000 | 153,266,000 |
Total intangible assets, Gross carrying value | 262,834,000 | 245,509,000 |
Total intangible assets, Net carrying value | 167,202,000 | 172,273,000 |
Increase (decrease) goodwill | 483,591,000 | 470,506,000 | 346,246,000
Intangible amortization expense | 22,400,000 | 18,100,000 | 25,000,000
Future estimated amortization of identifiable intangible assets |  |  |
2014 | 21,426,000 |  |
2015 | 18,823,000 |  |
2016 | 16,512,000 |  |
2017 | 14,443,000 |  |
2018 | 13,041,000 |  |
Thereafter | 61,785,000 |  |
Land segment |  |  |
Identifiable intangible assets |  |  |
Total intangible assets, Net carrying value | 129,840,000 | 126,743,000 |
Increase (decrease) goodwill | 298,996,000 | 291,243,000 | 173,215,000
Aviation segment |  |  |
Identifiable intangible assets |  |  |
Total intangible assets, Net carrying value | 31,632,000 | 38,874,000 |
Increase (decrease) goodwill | 115,507,000 | 109,332,000 | 102,509,000
2012 Acquisitions |  |  |
Identifiable intangible assets |  |  |
Increase (decrease) goodwill |  | 121,188,000 |
Increase (decrease) identifiable intangible assets |  | 87,150,000 |
2012 Acquisitions | Land segment | Adjustment |  |  |
Identifiable intangible assets |  |  |
Increase (decrease) goodwill | (2,000,000) |  |
Increase (decrease) identifiable intangible assets | 3,300,000 |  |
Increase (decrease) in identifiable intangible assets | (900,000) |  |
Increase in assumed liabilities | 400,000 |  |
2012 Acquisitions | Land segment | Reclassification |  |  |
Identifiable intangible assets |  |  |
Increase (decrease) goodwill | (6,500,000) |  |
2012 Acquisitions | Aviation segment | Reclassification |  |  |
Identifiable intangible assets |  |  |
Increase (decrease) goodwill | 6,500,000 |  |
2011 Acquisitions |  |  |
Identifiable intangible assets |  |  |
Increase (decrease) goodwill |  |  | 46,282,000
Increase (decrease) identifiable intangible assets |  |  | 23,414,000
2011 Acquisitions | Land segment | Reclassification |  |  |
Identifiable intangible assets |  |  |
Increase (decrease) goodwill |  | 2,900,000 |
2011 Acquisitions | Aviation segment | Adjustment |  |  |
Identifiable intangible assets |  |  |
Increase (decrease) goodwill |  | 1,800,000 |
Increase (decrease) identifiable intangible assets |  | (1,100,000) |
2011 Acquisitions | Aviation segment | Reclassification |  |  |
Identifiable intangible assets |  |  |
Increase (decrease) goodwill |  | (2,900,000) |
Trademark/trade name rights |  |  |
Identifiable intangible assets |  |  |
Indefinite lived Intangible Assets | 21,172,000 | 19,007,000 |
Customer relationships |  |  |
Identifiable intangible assets |  |  |
Gross Carrying Amount | 188,276,000 | 173,376,000 |
Accumulated Amortization | 79,688,000 | 61,562,000 |
Net | 108,588,000 | 111,814,000 |
Supplier agreements |  |  |
Identifiable intangible assets |  |  |
Gross Carrying Amount | 33,648,000 | 33,248,000 |
Accumulated Amortization | 7,310,000 | 5,531,000 |
Net | 26,338,000 | 27,717,000 |
Others |  |  |
Identifiable intangible assets |  |  |
Gross Carrying Amount | 19,738,000 | 19,878,000 |
Accumulated Amortization | 8,634,000 | 6,143,000 |
Net | $ 11,104,000 | $ 13,735,000 |

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