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Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2017

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 September 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	$	5,448		$	—		$	5,448		$	—
Total Assets	$	5,448		$	—		$	5,448		$	—

Liabilities:
Derivative instruments	$	1,088		$	—		$	1,088		$	—
5.375% Senior notes	517,500			—			517,500			—
4.75% Senior notes	637,213			—			637,213			—
Term loan A	108,323			—			108,323			—
Term loan B	544,541			—			544,541			—
Total Liabilities	$	1,808,665		$	—		$	1,808,665		$	—



				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 instruments	$	13,325		$	—		$	13,325		$	—
Total Assets	$	13,325		$	—		$	13,325		$	—

Liabilities:
Derivative instruments	$	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 debt	5,201			—			5,201			—
Total Liabilities	$	1,815,092		$	—		$	1,815,092		$	—