Industry Segments (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Industry Segments [Abstract]
Decrease in accruals related to import duties included in cost of goods sold	$ 3,100,000
Summary of segment information [Abstract]
Net sales	649,691,000	582,282,000	1,224,065,000	1,141,972,000
Cost of goods sold	557,775,000	501,125,000	1,053,552,000	983,975,000
Depreciation and amortization	8,592,000	8,328,000	16,699,000	16,482,000
Selling, general, and administrative expense	35,120,000	34,814,000	67,303,000	66,157,000
Insurance settlement	0	(106,332,000)	0	(106,332,000)
Operating income	48,204,000	144,347,000	86,511,000	181,690,000
Interest expense	(1,457,000)	(1,101,000)	(2,483,000)	(1,697,000)
Other income, net	127,000	319,000	215,000	3,482,000
Income before income taxes	46,874,000	143,565,000	84,243,000	183,475,000
Corporate and Eliminations [Member]
Summary of segment information [Abstract]
Net sales	(2,908,000)	(3,435,000)	(6,591,000)	(9,346,000)
Cost of goods sold	(2,873,000)	(3,404,000)	(6,524,000)	(9,248,000)
Depreciation and amortization	604,000	543,000	1,208,000	1,089,000
Selling, general, and administrative expense	6,703,000	8,265,000	12,931,000	13,259,000
Insurance settlement		(2,437,000)		(2,437,000)
Operating income	(7,342,000)	(6,402,000)	(14,206,000)	(12,009,000)
Plumbing and Refrigeration Segment [Member] | Operating Segments [Member]
Summary of segment information [Abstract]
Net sales	397,190,000	328,673,000	735,217,000	640,487,000
Cost of goods sold	336,256,000	277,933,000	625,281,000	542,747,000
Depreciation and amortization	5,096,000	4,443,000	9,516,000	8,689,000
Selling, general, and administrative expense	23,508,000	20,382,000	44,205,000	40,509,000
Insurance settlement		(103,895,000)		(103,895,000)
Operating income	32,330,000	129,810,000	56,215,000	152,437,000
OEM Segment [Member] | Operating Segments [Member]
Summary of segment information [Abstract]
Net sales	255,409,000	257,044,000	495,439,000	510,831,000
Cost of goods sold	224,392,000	226,596,000	434,795,000	450,476,000
Depreciation and amortization	2,892,000	3,342,000	5,975,000	6,704,000
Selling, general, and administrative expense	4,909,000	6,167,000	10,167,000	12,389,000
Insurance settlement		0		0
Operating income	$ 23,216,000	$ 20,939,000	$ 44,502,000	$ 41,262,000