Industry Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Summary of segment information [Abstract]
Net sales	$ 528,854	$ 514,165	$ 1,670,826	$ 1,685,932
Cost of goods sold	456,302	449,718	1,440,277	1,465,744
Depreciation and amortization	7,882	7,870	24,364	23,318
Selling, general, and administrative expense	32,921	32,120	99,078	97,209
Gain on sale of plastics fittings manufacturing assets	(39,765)	0	(39,765)	0
Impairment charges	4,304	0	4,304	0
Insurance settlement	0	0	(106,332)	(1,500)
Operating income	67,210	24,457	248,900	101,161
Interest expense	(1,243)	(353)	(2,940)	(5,711)
Other income (expense,) net	842	219	4,324	963
Income before income taxes	66,809	24,323	250,284	96,413
Plumbing and Refrigeration Segment [Member]
Summary of segment information [Abstract]
Net sales	301,622	297,913	942,109	944,955
Cost of goods sold	258,035	257,978	800,782	808,631
Depreciation and amortization	4,172	4,044	12,861	12,340
Selling, general, and administrative expense	20,736	18,298	61,245	57,028
Gain on sale of plastics fittings manufacturing assets	(39,765)		(39,765)
Impairment charges	4,173		4,173
Insurance settlement			(103,895)	(1,500)
Operating income	54,271	17,593	206,708	68,456
OEM Segment [Member]
Summary of segment information [Abstract]
Net sales	230,396	221,468	741,227	760,995
Cost of goods sold	201,399	196,789	651,875	676,635
Depreciation and amortization	3,150	3,437	9,854	9,908
Selling, general, and administrative expense	5,779	6,821	18,168	20,249
Gain on sale of plastics fittings manufacturing assets	0		0
Impairment charges	131		131
Insurance settlement			0	0
Operating income	19,937	14,421	61,199	54,203
Corporate and Eliminations [Member]
Summary of segment information [Abstract]
Net sales	(3,164)	(5,216)	(12,510)	(20,018)
Cost of goods sold	(3,132)	(5,049)	(12,380)	(19,522)
Depreciation and amortization	560	389	1,649	1,070
Selling, general, and administrative expense	6,406	7,001	19,665	19,932
Gain on sale of plastics fittings manufacturing assets	0		0
Impairment charges	0		0
Insurance settlement			(2,437)	0
Operating income	$ (6,998)	$ (7,557)	$ (19,007)	$ (21,498)