Quarterly report pursuant to Section 13 or 15(d)

Investments - Additional Information (Detail)

v2.4.0.8
Investments - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Mutual Funds [Member]
Schedule of Available-for-Sale Securities [Line Items]    
Recognized gross realized losses $ 0 $ 4