Revolving Credit Facility - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended	3 Months Ended		3 Months Ended			3 Months Ended		1 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Oct. 28, 2011 2011 Revolving Credit Facility	Mar. 31, 2013 2011 Revolving Credit Facility	Mar. 31, 2013 Minimum	Mar. 31, 2013 Minimum 2011 Revolving Credit Facility	Oct. 28, 2011 Minimum 2011 Revolving Credit Facility	Mar. 31, 2013 Maximum	Mar. 31, 2013 Maximum 2011 Revolving Credit Facility	Oct. 28, 2011 Maximum 2011 Revolving Credit Facility	Oct. 28, 2011 Scenario One 2011 Revolving Credit Facility	Oct. 28, 2011 Scenario Two 2011 Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity of revolving credit facility			$ 500.0
Line of credit facility maturity date			Oct. 28, 2016
Additional borrowing capacity under revolving credit facility			200.0
LIBOR applicable margin							0.875%			1.625%		1.00%
Interest rate in addition to Federal Funds rate											0.50%
Additional margin over LIBOR										0.625%
Prime interest rate				3.25%
LIBOR rate, minimum				0.20%
LIBOR rate, maximum				0.21%
Commitment fee percentage						0.15%			0.30%
Letters of credit, issued but undrawn				$ 10.9
Weighted average effective interest rate incurred on borrowings	1.70%	1.70%
Minimum fixed charge coverage ratio					1.5
Maximum leverage ratio								3.0
Maximum leverage ratio for payment of dividends and stock repurchases									2.75