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Goodwill and Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014 | Mar. 31, 2014
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Carrying amount of goodwill by reportable segment |  |  |
Goodwill | $ 122,923 us-gaap_Goodwill | $ 123,881 us-gaap_Goodwill | $ 129,433 us-gaap_Goodwill
North America |  |  |
Carrying amount of goodwill by reportable segment |  |  |
Goodwill | 84,216 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = ssd_NorthAmericaSegmentMember | 84,526 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = ssd_NorthAmericaSegmentMember | 84,690 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = ssd_NorthAmericaSegmentMember
Europe |  |  |
Carrying amount of goodwill by reportable segment |  |  |
Goodwill | 37,256 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = ssd_EuropeSegmentMember | 37,788 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = ssd_EuropeSegmentMember | 42,982 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = ssd_EuropeSegmentMember
Asia/Pacific |  |  |
Carrying amount of goodwill by reportable segment |  |  |
Goodwill | $ 1,451 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = ssd_AsiaPacificSegmentMember | $ 1,567 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = ssd_AsiaPacificSegmentMember | $ 1,761 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = ssd_AsiaPacificSegmentMember

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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