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Commitments and Contingencies (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract] |  |  |
Rental expense | $ 6,900,000 us-gaap_OperatingLeasesRentExpenseNet | $ 6,900,000 us-gaap_OperatingLeasesRentExpenseNet | $ 6,900,000 us-gaap_OperatingLeasesRentExpenseNet
Minimum rental commitments |  |  |
2015 | 6,658,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent |  |
2016 | 4,668,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears |  |
2017 | 2,710,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears |  |
2018 | 2,218,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears |  |
2019 | 993,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears |  |
Thereafter | 1,947,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter |  |
Minimum rental commitments under all non-cancelable leases | 19,194,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue |  |
Future minimum commitments |  |  |
2015 | 26,031,000 us-gaap_ContractualObligationDueInNextTwelveMonths |  |
2016 | 481,000 us-gaap_ContractualObligationDueInSecondYear |  |
2017 | 294,000 us-gaap_ContractualObligationDueInThirdYear |  |
2018 | 30,000 us-gaap_ContractualObligationDueInFourthYear |  |
2019 | 0 us-gaap_ContractualObligationDueInFifthYear |  |
Thereafter | 0 us-gaap_ContractualObligationDueAfterFifthYear |  |
Total commitments | 26,836,000 us-gaap_ContractualObligation |  |
Purchase Obligations |  |  |
Future minimum commitments |  |  |
2015 | 25,581,000 us-gaap_ContractualObligationDueInNextTwelveMonths / us-gaap_OtherCommitmentsAxis = ssd_PurchaseCommitmentIncludingLongTermCommitmentMember |  |
2016 | 31,000 us-gaap_ContractualObligationDueInSecondYear / us-gaap_OtherCommitmentsAxis = ssd_PurchaseCommitmentIncludingLongTermCommitmentMember |  |
2017 | 31,000 us-gaap_ContractualObligationDueInThirdYear / us-gaap_OtherCommitmentsAxis = ssd_PurchaseCommitmentIncludingLongTermCommitmentMember |  |
2018 | 30,000 us-gaap_ContractualObligationDueInFourthYear / us-gaap_OtherCommitmentsAxis = ssd_PurchaseCommitmentIncludingLongTermCommitmentMember |  |
2019 | 0 us-gaap_ContractualObligationDueInFifthYear / us-gaap_OtherCommitmentsAxis = ssd_PurchaseCommitmentIncludingLongTermCommitmentMember |  |
Thereafter | 0 us-gaap_ContractualObligationDueAfterFifthYear / us-gaap_OtherCommitmentsAxis = ssd_PurchaseCommitmentIncludingLongTermCommitmentMember |  |
Total commitments | 25,673,000 us-gaap_ContractualObligation / us-gaap_OtherCommitmentsAxis = ssd_PurchaseCommitmentIncludingLongTermCommitmentMember |  |
Debt Interest Obligations |  |  |
Future minimum commitments |  |  |
2015 | 450,000 us-gaap_ContractualObligationDueInNextTwelveMonths / us-gaap_OtherCommitmentsAxis = us-gaap_DebtMember |  |
2016 | 450,000 us-gaap_ContractualObligationDueInSecondYear / us-gaap_OtherCommitmentsAxis = us-gaap_DebtMember |  |
2017 | 263,000 us-gaap_ContractualObligationDueInThirdYear / us-gaap_OtherCommitmentsAxis = us-gaap_DebtMember |  |
2018 | 0 us-gaap_ContractualObligationDueInFourthYear / us-gaap_OtherCommitmentsAxis = us-gaap_DebtMember |  |
2019 | 0 us-gaap_ContractualObligationDueInFifthYear / us-gaap_OtherCommitmentsAxis = us-gaap_DebtMember |  |
Thereafter | 0 us-gaap_ContractualObligationDueAfterFifthYear / us-gaap_OtherCommitmentsAxis = us-gaap_DebtMember |  |
Total commitments | $ 1,163,000 us-gaap_ContractualObligation / us-gaap_OtherCommitmentsAxis = us-gaap_DebtMember |  |

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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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