Fair Value Measurement (Tables)

12 Months Ended

Dec. 30, 2017

Fair Value Disclosures [Abstract]

Fair value measured on recurring basis

The following tables presents the Company's financial instruments that are measured at fair value on a recurring and nonrecurring basis as of December 30, 2017 and December 31, 2016 and are categorized using the fair value hierarchy under FASB authoritative guidance.  The fair value hierarchy has three levels based on the reliability of the inputs used to determine the fair value.

			Fair Value Measurements at December 30, 2017 Using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
(In thousands of dollars)	Total		(Level 1)		(Level 2)		(Level 3)
Assets
Derivative assets	$	4,346	$	—	$	4,346	$	—
Total Assets	4,346		—		4,346		—
Liabilities
Derivative liabilities	2,326		—		2,326		—
5.375% Senior Notes	513,100		—		513,100		—
4.75% Senior Notes	646,681		—		646,681		—
Term Loan A	95,883		—		95,883		—
Term Loan B	511,616		—		511,616		—
Total Liabilities	$	1,769,606	$	—	$	1,769,606	$	—

			Fair Value Measurements at December 31, 2016 Using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
(In thousands of dollars)	Total		(Level 1)		(Level 2)		(Level 3)
Assets
Derivative assets	$	13,325	$	—	$	13,325	$	—
Total Assets	13,325		—		13,325		—
Liabilities
Derivative liabilities	730		—		730		—
5.375% Senior Notes	520,300		—		520,300		—
4.75% Senior Notes	575,111		—		575,111		—
Term Loan A	120,403		—		120,403		—
Term Loan B	593,347		—		593,347		—
Revolver	5,201		—		5,201		—
Total Liabilities	$	1,815,092	$	—	$	1,815,092	$	—