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Acquisitions (Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Jul. 06, 2018 | Dec. 31, 2017 | Jan. 06, 2017 | Nov. 23, 2016
--- | --- | --- | --- | --- | ---
Assets: |  |  |  |  |
Goodwill | $ 264,885 |  | $ 237,107 |  |
Griswold |  |  |  |  |
Assets: |  |  |  |  |
Accounts receivable |  | $ 2,553 |  |  |
Other current assets |  | 155 |  |  |
Inventory |  | 2,951 |  |  |
Property, plant & equipment |  | 7,554 |  |  |
Other intangible assets |  | 34,120 |  |  |
Goodwill |  | 31,738 |  |  |
Total assets |  | 79,071 |  |  |
Liabilities: |  |  |  |  |
Accounts payable |  | 711 |  |  |
Accrued employee benefits and compensation |  | 299 |  |  |
Other accrued liabilities |  | 92 |  |  |
Total liabilities |  | 1,102 |  |  |
Fair value of net assets acquired |  | $ 77,969 |  |  |
Diversified Silicone Products, Inc. |  |  |  |  |
Assets: |  |  |  |  |
Accounts receivable |  |  |  | $ 2,724 |
Prepaid expenses |  |  |  | 21 |
Inventory |  |  |  | 2,433 |
Property, plant & equipment |  |  |  | 1,589 |
Other intangible assets |  |  |  | 35,860 |
Goodwill |  |  |  | 17,793 |
Total assets |  |  |  | 60,420 |
Liabilities: |  |  |  |  |
Accounts payable |  |  |  | 179 |
Accrued expenses |  |  |  | 50 |
Total liabilities |  |  |  | 229 |
Fair value of net assets acquired |  |  |  | $ 60,191 |
DeWAL |  |  |  |  |
Assets: |  |  |  |  |
Cash and equivalents |  |  |  |  | $ 1,539
Accounts receivable |  |  |  |  | 7,513
Other current assets |  |  |  |  | 691
Inventory |  |  |  |  | 9,915
Property, plant & equipment |  |  |  |  | 9,932
Other intangible assets |  |  |  |  | 73,500
Goodwill |  |  |  |  | 35,985
Other long-term assets |  |  |  |  | 101
Total assets |  |  |  |  | 139,176
Liabilities: |  |  |  |  |
Accounts payable |  |  |  |  | 2,402
Other current liabilities |  |  |  |  | 1,292
Total liabilities |  |  |  |  | 3,694
Fair value of net assets acquired |  |  |  |  | $ 135,482

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