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ACQUISITIONS - Summary of Preliminary Estimated Fair Values of Faiveley Transport Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Nov. 30, 2016
--- | --- | --- | ---
Assets acquired |  |  |
Goodwill | $ 2,460,103 | $ 2,078,765 |
Faiveley |  |  |
Assets acquired |  |  |
Cash and cash equivalents |  |  | $ 178,318
Accounts receivable |  |  | 439,631
Inventories |  |  | 205,649
Other current assets |  |  | 70,930
Property, plant & equipment |  |  | 148,746
Goodwill |  |  | 1,262,350
Other noncurrent assets |  |  | 184,564
Total assets acquired |  |  | 3,071,246
Liabilities assumed |  |  |
Current liabilities |  |  | 819,493
Debt |  |  | 409,899
Other noncurrent liabilities |  |  | 335,039
Total liabilities assumed |  |  | 1,564,431
Net assets acquired |  |  | 1,506,815
Faiveley | Trade Names |  |  |
Assets acquired |  |  |
Acquired intangible assets |  |  | 346,328
Faiveley | Customer Relationships |  |  |
Assets acquired |  |  |
Acquired intangible assets |  |  | 233,529
Faiveley | Patents |  |  |
Assets acquired |  |  |
Acquired intangible assets |  |  | $ 1,201

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