Derivative Instruments - Forward Interest Rate Swaps Amounts Recognized at their Fair Value Through Statement of Earnings in Other Income Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Dec. 31, 2013
Derivatives And Hedging Activities [Line Items]
Loss on forward interest-rate swaps	$ (2,433)	$ 0	$ (2,433)	$ 0
Liabilities:
Other long-term liabilities	17,674		17,674		15,477
Forward interest rate swap contracts [Member]
Derivatives And Hedging Activities [Line Items]
Loss on forward interest-rate swaps	(2,433)	0	(2,433)	0
Liabilities:
Other long-term liabilities	2,433		2,433		0
Total	$ 2,433		$ 2,433		$ 0