Acquisition - Summary of Net Sales and Earnings Before Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Business Combination, Separately Recognized Transactions [Abstract]
Net Sales	$ 159,563	$ 137,357	$ 460,636	$ 438,620
Earnings before income taxes	10,392	7,408	13,933	14,218
D And R Technology [Member]
Business Combination, Separately Recognized Transactions [Abstract]
Net Sales	11,820		37,716
Earnings before income taxes	$ 602		$ 2,458