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Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair value measured on recurring basis

The fair value hierarchy has three levels based on the reliability of the inputs used to determine the fair value.



				Fair Value Measurements at March 31, 2018 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 instruments	$	1,052		$	—		$	1,052		$	—
Total Assets	$	1,052		$	—		$	1,052		$	—

Liabilities:
Derivative instruments	$	2,765		$	—		$	2,765		$	—
5.375% Senior notes	508,750			—			508,750			—
4.75% Senior notes	665,076			—			665,076			—
Term loan A	94,450			—			94,450			—
Term loan B	510,353			—			510,353			—
Revolver debt	54,544			—			54,544			—
Total Liabilities	$	1,835,938		$	—		$	1,835,938		$	—



				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 instruments	$	4,346		$	—		$	4,346		$	—
Total Assets	$	4,346		$	—		$	4,346		$	—

Liabilities:
Derivative instruments	$	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		$	—