Business Segments (Tables)

9 Months Ended

Oct. 01, 2011

Business Segments [Abstract]

Schedule Of Reportable Segments

	Mechanical Segment						Electrical Segment						Mechanical Segment						Electrical Segment
	Three Months Ended						Three Months Ended						Nine Months Ended						Nine Months Ended
	October 1, 2011			October 2, 2010			October 1, 2011			October 2, 2010			October 1, 2011			October 2, 2010			October 1, 2011			October 2, 2010
Net Sales	$	69,435		$	63,012		$	667,450		$	527,789		$	208,271		$	174,476		$	1,873,054		$	1,507,824
Income from Operations		8,769			7,845			69,375			62,038			27,273			22,232			169,800			177,215
% of Net Sales		12.6	%		12.4	%		10.4	%		11.8	%		13.1	%		12.7	%		9.1	%		11.8	%
Goodwill at end of period	$	11,942		$	11,261		$	1,123,760		$	699,982		$	11,942		$	11,261		$	1,123,760		$	699,982