Represents the employer contribution as a percentage of participating employee's compensation.

No definition available.

Name:	ssd_DefinedContributionPlanEmployerContributionAsPercentageOfEmployeesCompensation
Namespace Prefix:	ssd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ssd_DefinedContributionPlanLineItems
Namespace Prefix:	ssd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of defined contribution retirement plans.

+ References

No definition available.

+ Details

Name:	ssd_NumberOfDefinedContributionRetirementPlans
Namespace Prefix:	ssd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

+ Details

Name:	us-gaap_PensionContributions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Retirement Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012	Dec. 31, 2011
Defined contribution plans
Number of defined contribution retirement plans	6
Cost of defined contribution plans	$ 8.2	$ 7.7	$ 6.7
Contributions to pension funds	$ 2.2	$ 2.1	$ 1.8
Defined contribution plan - U.S Plans
Defined contribution plans
Number of defined contribution retirement plans	2
Defined contribution plan - European and Canadian Plans
Defined contribution plans
Number of defined contribution retirement plans	4
Defined contribution plan - European and Canadian Plans \| Minimum
Defined contribution plans
Entity's contribution to retirement plans as percentage of employees' compensation	3.00%
Defined contribution plan - European and Canadian Plans \| Maximum
Defined contribution plans
Entity's contribution to retirement plans as percentage of employees' compensation	15.00%