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Acquisitions, Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands |  |  | 1 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2017 | Feb. 01, 2017 | Jun. 30, 2018 | Feb. 28, 2018 | Jan. 31, 2018 | Jun. 30, 2017 | May 31, 2017 | Feb. 28, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Change in goodwill |  |  |  |  |  |  |  |  | $ 260 |
STLA |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of interests acquired |  |  |  |  |  |  |  |  | 100.00% |
Cash consideration |  |  | $ 14,845 |  |  |  |  |  |  |
STLA | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired intangible assets useful life |  |  | 15 years |  |  |  |  |  |  |
Hehr |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  | $ 51,460 |  |  |  |  |  |
Hehr | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired intangible assets useful life |  |  |  | 13 years |  |  |  |  |  |
Metallarte S.r.l. |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of interests acquired |  |  |  |  |  |  |  |  |  | 100.00%
Cash consideration |  |  |  |  |  | $ 14,100 |  |  |  |
Total purchase price | $ 15,867 |  |  |  |  |  |  |  |  |
Metallarte S.r.l. | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired intangible assets useful life |  |  |  |  |  | 15 years |  |  |  |
Taylor Made |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of interests acquired |  |  |  |  | 100.00% |  |  |  |  |
Cash consideration |  |  |  |  | $ 90,396 |  |  |  |  |
Taylor Made | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired intangible assets useful life |  |  |  |  | 15 years |  |  |  |  |
Lexington |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  |  |  |  | $ 40,062 |  |  |
Total purchase price |  |  |  |  |  |  | $ 40,100 |  |  |
Lexington | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired intangible assets useful life |  |  |  |  |  |  | 15 years |  |  |
SessaKlein S.p.A. |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of interests acquired |  |  |  |  |  |  |  | 100.00% |  |
Total purchase price |  | $ 10,340 |  |  |  |  |  | $ 6,500 |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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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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