Summary of Stock Option Activity (Detail) (USD $)	3 Months Ended
	Mar. 30, 2013
Share
Balance at beginning of period, Shares	5,212,738
Options granted, Shares	3,500
Options exercised, Shares	(100,016)
Options forfeited and expired, Shares	(113,173)
Balance at end of period, shares	5,003,049
Exercisable at end of period, Shares	2,881,728
Weighted average fair value of options granted (Black-Scholes)	$ 5.07
Wtd. Avg. Exercise Price
Balance at beginning of period, Weighted Average Exercise Price	$ 10.57
Options granted, Weighted Average Exercise Price	$ 9.76
Options exercised, Weighted Average Exercise Price	$ 5.32
Options forfeited and expired, Weighted Average Exercise Price	$ 8.89
Balance at end of period, Weighted Average Exercise Price	$ 10.71