XML 80 R65.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Business Acquisitions - Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination (Details) - Conwed $ in Millions | Jan. 20, 2017 USD ($)
--- | ---
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Fair Value | $ 134.4
Trade names |
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Fair Value | 7.1
Total amortizable intangible assets |
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Fair Value | 127.3
Customer relationships |
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Fair Value | $ 108.0
Weighted-Average Amortization Period (Years) | 15 years
Developed technology |
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Fair Value | $ 18.1
Weighted-Average Amortization Period (Years) | 17 years 2 months 12 days
Non-competition agreements |
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items] |
Fair Value | $ 1.2
Weighted-Average Amortization Period (Years) | 7 years 2 months 12 days

X
- Definition [Line Items] for Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table] + References No definition available. + Details
Name: | swm_FiniteLivedandIndefiniteLivedIntangibleAssetsAcquiredasPartofBusinessCombinationLineItems
Namespace Prefix: | swm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -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
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=swm_ConwedPlasticsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_FiniteLivedIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_DevelopedTechnologyRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |