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Acquisitions - Narrative (Details) - USD ($) $ in Thousands |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Jan. 06, 2017 | Nov. 23, 2016 | Dec. 21, 2015 | Jan. 22, 2015 | Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 8 years 3 months 18 days |  |
Amortization expense |  |  |  |  |  | $ 14,800 | $ 11,200 | $ 10,900
Estimated future amortization expense for 2018 |  |  |  |  | $ 15,300 | 15,300 |  |
Estimated future amortization expense for 2019 |  |  |  |  | 15,100 | 15,100 |  |
Estimated future amortization expense for 2020 |  |  |  |  | 11,800 | 11,800 |  |
Estimated future amortization expense for 2021 |  |  |  |  | 11,100 | 11,100 |  |
Estimated future amortization expense for 2022 |  |  |  |  | 10,700 | 10,700 |  |
Proceeds from the sale of a business |  |  | $ 1,265 |  |  | 0 | 0 | 1,265
Loss on disposition of a business |  |  | $ 4,800 |  |  | $ 0 | 0 | $ 4,819
Customer relationships |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 9 years 7 months 6 days |  |
Technology |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 5 years 4 months 24 days |  |
Covenant not to compete |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 2 years 6 months |  |
Diversified Silicone Products, Inc. |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Purchase price | $ 60,200 |  |  |  |  |  |  |
Estimated future amortization expense for 2018 |  |  |  |  | 1,900 | $ 1,900 |  |
Estimated future amortization expense for 2019 |  |  |  |  | 1,800 | 1,800 |  |
Estimated future amortization expense for 2020 |  |  |  |  | 1,800 | 1,800 |  |
Estimated future amortization expense for 2021 |  |  |  |  | 1,800 | 1,800 |  |
Estimated future amortization expense for 2022 |  |  |  |  | 1,700 | 1,700 |  |
Business acquisition, acquiree revenue |  |  |  |  | 5,500 | $ 22,300 |  |
Diversified Silicone Products, Inc. | Customer relationships |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired | 30,500 |  |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 11 years 9 months 18 days |  |
Diversified Silicone Products, Inc. | Technology |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired | 1,800 |  |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 4 years 3 months 18 days |  |
Diversified Silicone Products, Inc. | Trademarks |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired | 3,300 |  |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 11 years 8 months 12 days |  |
Diversified Silicone Products, Inc. | Covenant not to compete |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired | 300 |  |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 4 years 1 month 6 days |  |
DeWAL |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Purchase price |  | $ 135,500 |  |  |  |  |  |
Cash from credit facility used to fund acquisition |  | 136,000 |  |  |  |  |  |
Estimated future amortization expense for 2018 |  |  |  |  | 3,700 | $ 3,700 |  |
Estimated future amortization expense for 2019 |  |  |  |  | 4,100 | 4,100 |  |
Estimated future amortization expense for 2020 |  |  |  |  | 4,300 | 4,300 |  |
Estimated future amortization expense for 2021 |  |  |  |  | 4,300 | 4,300 |  |
Estimated future amortization expense for 2022 |  |  |  |  | 4,300 | 4,300 |  |
Transaction costs |  |  |  |  |  | 100 | 2,100 |
Business acquisition, acquiree revenue |  |  |  |  |  | $ 62,000 | 5,400 |
DeWAL | Customer relationships |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired |  | 46,700 |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 13 years 6 months |  |
DeWAL | Technology |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired |  | 22,000 |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 8 years 7 months 6 days |  |
DeWAL | Trademarks |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired |  | 4,300 |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 5 years 2 months 12 days |  |
DeWAL | Covenant not to compete |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired |  | $ 500 |  |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 3 years 9 months 18 days |  |
Arlon |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Purchase price |  |  |  | $ 157,000 |  |  |  |
Cash from credit facility used to fund acquisition |  |  |  | 125,000 |  |  |  |
Estimated future amortization expense for 2018 |  |  |  |  | 5,800 | $ 5,800 |  |
Estimated future amortization expense for 2019 |  |  |  |  | 5,800 | 5,800 |  |
Estimated future amortization expense for 2020 |  |  |  |  | $ 5,800 | $ 5,800 |  |
Transaction costs |  |  |  |  |  |  | 1,500 |
Business acquisition, acquiree revenue |  |  |  |  |  |  | 100,000 |
Business acquisition, acquiree net income |  |  |  |  |  |  | $ 25,100 |
Arlon | Customer relationships |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  | 32,700 |  |  |  |
Weighted average useful life |  |  |  |  |  | 6 years |  |
Arlon | Technology |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  | 15,800 |  |  |  |
Weighted average useful life |  |  |  |  |  | 5 years 8 months 12 days |  |
Arlon | Trademarks |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Intangible assets acquired |  |  |  | $ 1,600 |  |  |  |
Weighted average useful life |  |  |  |  |  | 3 years 2 months 12 days |  |
Minimum | Diversified Silicone Products, Inc. |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Amortization expense |  |  |  |  |  | $ 1,100 |  |
Minimum | DeWAL |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Amortization expense |  |  |  |  |  | 2,400 |  |
Minimum | Arlon |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Amortization expense |  |  |  |  |  | 1,800 |  |
Maximum | Diversified Silicone Products, Inc. |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Amortization expense |  |  |  |  |  | 2,000 |  |
Maximum | DeWAL |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Amortization expense |  |  |  |  |  | 4,300 |  |
Maximum | Arlon |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Amortization expense |  |  |  |  |  | 5,800 |  |
Revolving Credit Facility | Diversified Silicone Products, Inc. |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Cash from credit facility used to fund acquisition | $ 30,000 |  |  |  |  |  |  |
Selling, General and Administrative Expenses | Diversified Silicone Products, Inc. |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Transaction costs |  |  |  |  |  | $ 500 |  |

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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