Industry Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Industry Segments [Abstract]
Decrease in accruals related to import duties included in cost of goods sold				$ (3,100)
Summary of segment information [Abstract]
Net sales	$ 535,184	$ 602,820	$ 1,628,019	1,826,885
Cost of goods sold	467,167	521,278	1,398,366	1,574,830
Depreciation and amortization	8,749	8,952	24,790	25,651
Selling, general, and administrative expense	32,241	34,004	98,492	100,512
Gain on sale of assets	0	0	(15,376)	(1,417)
Severance	0	860	3,442	3,072
Operating income	27,027	37,726	118,305	124,237
Interest expense	(1,682)	(1,430)	(5,977)	(3,913)
Other income, net	164	225	534	440
Income before income taxes	25,509	36,521	112,862	120,764
Corporate and Eliminations [Member]
Summary of segment information [Abstract]
Net sales	(2,434)	(2,906)	(7,649)	(9,497)
Cost of goods sold	(2,389)	(2,874)	(7,530)	(9,398)
Depreciation and amortization	442	517	1,395	1,725
Selling, general, and administrative expense	5,323	5,858	17,841	18,789
Gain on sale of assets			0	0
Severance		0	0	0
Operating income	(5,810)	(6,407)	(19,355)	(20,613)
Plumbing and Refrigeration Segment [Member] | Operating Segments [Member]
Summary of segment information [Abstract]
Net sales	325,022	357,843	957,375	1,093,060
Cost of goods sold	280,891	308,927	819,591	934,208
Depreciation and amortization	4,468	5,287	13,568	14,803
Selling, general, and administrative expense	20,104	22,613	61,117	66,023
Gain on sale of assets			(15,376)	(1,417)
Severance		860	3,442	3,072
Operating income	19,559	20,156	75,033	76,371
OEM Segment [Member] | Operating Segments [Member]
Summary of segment information [Abstract]
Net sales	212,596	247,883	678,293	743,322
Cost of goods sold	188,665	215,225	586,305	650,020
Depreciation and amortization	3,839	3,148	9,827	9,123
Selling, general, and administrative expense	6,814	5,533	19,534	15,700
Gain on sale of assets			0	0
Severance		0	0	0
Operating income	$ 13,278	$ 23,977	$ 62,627	$ 68,479