Reconciliation of Number of Common Shares used in Calculation of Basic and Diluted Earnings Per Share (EPS) (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Line Items]
Basic EPS, shares									17,087,104	16,910,830	16,503,773
Effect of dilutive securities, shares									154,011	218,298	364,698
Diluted EPS, shares									17,241,115	17,129,128	16,868,471
Basic EPS	$ 0.48	$ 0.29	$ 0.21	$ 0.27	$ 0.46	$ 0.22	$ 0.28	$ 0.40	$ 1.26	$ 1.36	$ 1.42
Effect of dilutive securities									$ (0.01)	$ (0.02)	$ (0.03)
Diluted EPS	$ 0.48	$ 0.29	$ 0.21	$ 0.27	$ 0.46	$ 0.21	$ 0.28	$ 0.39	$ 1.25	$ 1.34	$ 1.39