Industry Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Summary of segment information [Abstract]
Net sales	$ 559,690	$ 577,668
Cost of goods sold	482,850	493,175
Depreciation and amortization	8,154	7,529
Selling, general, and administrative expense	31,343	31,602
Insurance settlement	0	(1,500)
Operating income	37,343	46,862
Interest expense	(596)	(2,637)
Other income, net	3,163	254
Income before income taxes	39,910	44,479
Plumbing and Refrigeration Segment [Member]
Summary of segment information [Abstract]
Net sales	311,814	315,354
Cost of goods sold	264,814	265,471
Depreciation and amortization	4,247	4,145
Selling, general, and administrative expense	20,128	18,980
Insurance settlement		(1,500)
Operating income	22,625	28,258
OEM Segment [Member]
Summary of segment information [Abstract]
Net sales	253,787	270,976
Cost of goods sold	223,880	236,200
Depreciation and amortization	3,362	3,059
Selling, general, and administrative expense	6,222	6,992
Insurance settlement		0
Operating income	20,323	24,725
Corporate and Eliminations [Member]
Summary of segment information [Abstract]
Net sales	(5,911)	(8,662)
Cost of goods sold	(5,844)	(8,496)
Depreciation and amortization	545	325
Selling, general, and administrative expense	4,993	5,630
Insurance settlement		0
Operating income	$ (5,605)	$ (6,121)