Industry Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Summary of segment information [Abstract]
Net sales	$ 594,099	$ 652,923	$ 1,171,767	$ 1,340,604
Cost of goods sold	522,851	573,877	1,016,026	1,163,751
Depreciation and amortization	7,919	9,166	15,448	18,865
Selling, general, and administrative expense	33,487	33,330	65,089	68,699
Litigation settlement				(10,500)
Insurance settlement	0	0	(1,500)	0
Operating income	29,842	36,550	76,704	99,789
Interest expense	(2,721)	(2,834)	(5,358)	(6,182)
Other income, net	490	264	744	1,323
Income before income taxes	27,611	33,980	72,090	94,930
Plumbing and Refrigeration Segment [Member]
Summary of segment information [Abstract]
Net sales	331,688	347,069	647,042	727,658
Cost of goods sold	285,182	296,033	550,653	619,228
Depreciation and amortization	4,151	5,349	8,296	11,183
Selling, general, and administrative expense	19,750	20,897	38,730	42,774
Litigation settlement				0
Insurance settlement			(1,500)
Operating income	22,605	24,790	50,863	54,473
OEM Segment [Member]
Summary of segment information [Abstract]
Net sales	268,551	314,086	539,527	633,422
Cost of goods sold	243,646	285,944	479,846	564,736
Depreciation and amortization	3,412	3,479	6,471	7,071
Selling, general, and administrative expense	6,436	5,847	13,428	13,153
Litigation settlement				0
Insurance settlement			0
Operating income	15,057	18,816	39,782	48,462
Corporate and Eliminations [Member]
Summary of segment information [Abstract]
Net sales	(6,140)	(8,232)	(14,802)	(20,476)
Cost of goods sold	(5,977)	(8,100)	(14,473)	(20,213)
Depreciation and amortization	356	338	681	611
Selling, general, and administrative expense	7,301	6,586	12,931	12,772
Litigation settlement				(10,500)
Insurance settlement			0
Operating income	$ (7,820)	$ (7,056)	$ (13,941)	$ (3,146)