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Commitments and Contingencies (Details 2)	12 Months Ended	1 Months Ended
	Dec. 31, 2012 lawsuit	Feb. 28, 2012 Nishimura Case [Member] lawsuit	Jul. 20, 2011 Nishimura Case [Member] lawsuit	Dec. 31, 2012 Simpson Strong-Tie San Bernardino County agreement	Dec. 31, 2012 Simpson Strong-Tie San Bernardino County Tool and die craftsmen and maintenance workers agreement	Dec. 31, 2012 Simpson Strong-Tie Stockton agreement
Commitments and Contingencies.
Percentage of employees represented by labor unions	14.00%
Collective bargaining arrangements
Collective bargaining agreements, number				2	1	2
Litigation
Number of lawsuits filed against the entity	4		5
Number of lawsuits dismissed		3

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- Definition

Represents the number of collective bargaining agreements.

+ References

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- Definition

Represents the percentage of employees who are represented by labor unions.

+ References

No definition available.

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- Definition

The number of claims settled and dismissed during the period.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The total amount of pending claims pertaining to a loss contingency accrual as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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