Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 28, 2010
Income Tax Disclosure [Abstract]
Income tax expense	$ 95,339,000	$ 347,000	$ 114,114,000	$ 3,472,000
Effective tax rate	40.00%	44.80%	40.00%	38.40%
Tax Separation Agreement date	Apr. 17, 2009
Income tax examination, period of letters issued to prior parent for proposed changes in specified tax years	30 days
Excise tax contested					$ 4,200,000