Equity-Based Compensation - Summary of Status of Stock Options (Detail) (USD $)	6 Months Ended
	Jun. 29, 2014
Summary of Status of Stock Options
Outstanding, Options at beginning of year	123,000
Exercised, Options	(115,100)
Expired, Options	(2,700)
Forfeited, Options	0
Outstanding, Options at end of period	5,200
Exercisable, Options at end of period	5,200
Outstanding, Weighted - Average Exercise Price at beginning of year	$ 12.78
Exercised, Weighted - Average Exercise Price	$ 12.84
Expired, Weighted - Average Exercise Price	$ 11.04
Forfeited, Weighted - Average Exercise Price	$ 0
Outstanding, Weighted - Average Exercise Price at end of period	$ 12.35
Exercisable, Weighted - Average Exercise Price at end of period	$ 12.35
Stock Options [Member]
Summary of Status of Stock Options
Intrinsic values of share options exercised	$ 831,000
Weighted average remaining contractual life	1 year 4 months 24 days
Aggregate intrinsic values of options outstanding and options exercisable	$ 32,000