Goodwill and Intangible Assets (Schedule of Goodwill) (Details) $ in Thousands	9 Months Ended
	Oct. 01, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning	$ 129,286
Goodwill, ending	132,205
North American Residential
Goodwill [Roll Forward]
Goodwill, beginning	2,843
Foreign exchange fluctuations	24
Goodwill, ending	2,867
Europe
Goodwill [Roll Forward]
Goodwill, beginning	32,410
Foreign exchange fluctuations	2,672
Goodwill, ending	35,082
Architectural
Goodwill [Roll Forward]
Goodwill, beginning	94,033
Foreign exchange fluctuations	223
Goodwill, ending	94,256
Operating Segments
Goodwill [Roll Forward]
Goodwill, beginning	129,286
Foreign exchange fluctuations	2,919
Goodwill, ending	$ 132,205