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Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Jul. 09, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Assets: |  |  |
Goodwill | $ 266,304 |  | $ 237,107
Griswold |  |  |
Assets: |  |  |
Accounts receivable, less allowance for doubtful accounts |  | $ 2,553 |
Inventory |  | 2,998 |
Other current assets |  | 154 |
Property, plant & equipment |  | 7,554 |
Other intangible assets |  | 34,120 |
Goodwill |  | 32,305 |
Total assets |  | 79,684 |
Liabilities: |  |  |
Accounts payable |  | 711 |
Accrued employee benefits and compensation |  | 299 |
Other accrued liabilities |  | 103 |
Total liabilities |  | 1,113 |
Fair value of net assets acquired |  | $ 78,571 |

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