Effect of Recording Equity-Based Compensation (Detail) (USD $)	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Equity Based Compensation Related to Employee Stock Purchase Programs [Line Items]
Total equity-based compensation	$ 697,000	$ 563,000
Tax benefit recognized	3,000	5,000
Stock Options
Equity Based Compensation Related to Employee Stock Purchase Programs [Line Items]
Total equity-based compensation	241,000	173,000
RSUs
Equity Based Compensation Related to Employee Stock Purchase Programs [Line Items]
Total equity-based compensation	292,000	76,000
Employee Stock Purchase Plan
Equity Based Compensation Related to Employee Stock Purchase Programs [Line Items]
Total equity-based compensation	$ 164,000	$ 314,000