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Commitments and Contingencies - Employee Relations (Details)	12 Months Ended
	Dec. 31, 2016 agreement
Collective bargaining arrangements
Percentage of employees represented by labor unions	20.00%
Simpson Strong-Tie | San Bernardino County
Collective bargaining arrangements
Collective bargaining agreements, number	2
Simpson Strong-Tie | San Bernardino County | Tool and die craftsmen and maintenance workers
Collective bargaining arrangements
Collective bargaining agreements, number	1
Simpson Strong-Tie | Stockton
Collective bargaining arrangements
Collective bargaining agreements, number	2

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- Definition

-- None. No documentation exists for this element. --

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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.

+ Details

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