Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Financial Assets Measured at Fair Value on Recurring Basis

As of June 30, 2018, the following table represents the Company’s liabilities measured at fair value on a recurring basis and the basis for that measurement (in thousands):

	Carrying Value June 30, 2018		Fair Value Measurement June 30, 2018		Quoted Prices in Active Markets for Identical Asset (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Liabilities:
Derivative liabilities (other current liabilities)	$	2,595	$	2,595		—	$	2,595		—

As of December 31, 2017, the following table represents the Company’s assets measured at fair value on a recurring basis and the basis for that measurement (in thousands):

	Carrying Value December 31, 2017		Fair Value Measurement December 31, 2017		Quoted Prices in Active Markets for Identical Asset (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Derivative assets (other current assets)	$	5,179	$	5,179		—	$	5,179		—

Schedule of Fair Value of Long-term Borrowings

Fair Value of Long-term Borrowings

	June 30, 2018				December 31, 2017
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(In thousands of US dollars)
Long-term Borrowings:
5.0% Exchangeable Senior Notes due March 2021 (Level 2)	$	82,249	$	131,100	$	81,576	$	127,617
6.625% Senior Notes due July 2021 (Level 2)	$	222,240	$	218,700	$	221,840	$	224,719