Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions In March 2013, the Company extended its lease on a property in Addison, Illinois, which is co-owned by Gerald Hagel, a vice president of Simpson Strong-Tie Company Inc. since March 2007. The extension is for an additional five years through 2018. The Company paid $0.3 million in 2013 to lease the property from Mr. Hagel and his wife, Susan Hagel, a former employee of Simpson Strong-Tie Company Inc. In 2015, the Company paid Tacit Knowledge, Inc. ("Tacit Knowledge"), a consultant on a software implementation project, $2.1 million for its services. The Company did not make payments to Tacit Knowledge prior to 2015. The project is continuing in 2016. Chris Andrasick, the Company's Director James S. Andrasick’s son, co-founded Tacit Knowledge in 2002. Tacit Knowledge was sold to Newgistics, Inc. ("Newgistics") in 2013. Chris Andrasick was hired by Newgistics in 2013, as their Chief Strategy and Innovation Officer for Digital Commerce, and he remained interim Chief Executive Officer for Tacit Knowledge into 2015, but he had no financial interest in Tacit Knowledge since the 2013 acquisition other than in his role as an officer of Newgistics. The payments that the Company made to Tacit Knowledge in 2015 were less than one-half of one percent of Newgistics's consolidated gross revenues for the fiscal year ended December 31, 2015.

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.