Segment Information, Net Sales by Major Product Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Segment Information [Abstract]
Percentage of net consolidated sales threshold constituting a major customer	10.00%	10.00%	10.00%
Revenue from External Customer [Line Items]
Net sales	$ 2,055,622	$ 2,100,002	$ 2,364,227
Tube and Fittings [Member]
Revenue from External Customer [Line Items]
Net sales	1,072,242	1,053,761	1,143,164
Brass Rod and Forgings [Member]
Revenue from External Customer [Line Items]
Net sales	371,237	436,456	556,985
OEM Components, Tube & Assemblies [Member]
Revenue from External Customer [Line Items]
Net sales	327,327	342,651	345,991
Valves and Plumbing Specialties [Member]
Revenue from External Customer [Line Items]
Net sales	209,217	198,012	262,504
Other [Member]
Revenue from External Customer [Line Items]
Net sales	$ 75,599	$ 69,122	$ 55,583