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Acquisition - Allocation of Purchase Price (Details) - USD ($) $ in Thousands |  |  | 9 Months Ended | 10 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 31, 2018 | Jun. 12, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Mar. 31, 2018 | Dec. 31, 2017
Business Acquisition |  |  |  |  |  |
Total consideration, net of cash acquired |  |  | $ 1,006 | $ 41,572 |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |  |
Goodwill |  |  | 1,262,979 |  |  | $ 1,305,956
Sovitec Mondial S.A. |  |  |  |  |  |
Business Acquisition |  |  |  |  |  |
Total consideration, net of cash acquired | $ 41,572 | $ 41,572 |  |  |  |
Measurement Period Adjustments, Total consideration, net of cash acquired |  |  |  |  | $ 0 |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |  |  |  |
Receivables | 14,305 | 14,305 |  |  | 14,305 |
Measurement Period Adjustments, Receivables |  |  |  |  | 0 |
Inventories | 9,248 | 7,645 |  |  | 9,248 |
Measurement Period Adjustments, Inventories |  |  | 1,603 |  | 1,603 |
Prepaid and other current assets | 400 | 400 |  |  | 400 |
Measurement Period Adjustments, Prepaids and other current assets |  |  |  |  | 0 |
Property, plant and equipment | 24,980 | 9,020 |  |  | 24,980 |
Measurement Period Adjustments, Property, plant and equipment |  |  |  |  | 15,960 |
Other intangible assets | 5,753 | 0 | $ 5,753 |  | 5,753 |
Measurement Period Adjustments, Other intangible assets |  |  |  |  | 5,753 |
Other long-term assets | 16,050 | 129 |  |  | 16,050 |
Measurement Period Adjustments, other long-term assets |  |  |  |  | 15,921 |
Fair value of assets acquired | 70,736 | 31,499 |  |  | 70,736 |
Measurement Period Adjustments, fair value of assets acquired |  |  |  |  | 39,237 |
Current debt | (6,420) | (6,420) |  |  | (6,420) |
Measurement Period Adjustments, Current debt |  |  |  |  | 0 |
Accounts payable | (10,748) | (10,748) |  |  | (10,748) |
Measurement Period Adjustments, Accounts payable |  |  |  |  | 0 |
Long-term debt | (10,189) | (10,189) |  |  | (10,189) |
Measurement Period Adjustments, Long-term liabilities |  |  |  |  | 0 |
Deferred income taxes | (4,426) | 0 |  |  | (4,426) |
Measurement Period Adjustments, Deferred income taxes |  |  |  |  | (4,426) |
Other long-term liabilities | (154) | (154) |  |  | (154) |
Measurement Period Adjustments, Other long-term liabilities |  |  |  |  | 0 |
Fair value of net assets acquired | 38,799 | 3,988 |  |  | 38,799 |
Measurement Period Adjustments, Fair value of net assets acquired |  |  |  |  | 34,811 |
Goodwill | 2,773 | 37,584 |  |  | 2,773 |
Measurement Period Adjustments, Goodwill |  |  |  |  | (34,811) |
Net assets including goodwill acquired | $ 41,572 | $ 41,572 |  |  | 41,572 |
Measurement Period Adjustments, Net assets including goodwill |  |  |  |  | $ 0 |

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