Acquisitions Acquisition (Details 2) - EFCO Corporation $ in Thousands	Jun. 12, 2017 USD ($)
Business Acquisition
Total other intangible assets	$ 71,500
Tradename
Business Acquisition
Total other intangible assets	32,400
Customer relationships
Business Acquisition
Total other intangible assets	$ 34,800
Estimated useful life (in years)	16 years
Backlog
Business Acquisition
Total other intangible assets	$ 4,300
Estimated useful life (in years)	1 year 6 months