Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2017

Derivative Instruments

Schedule of fair value of outstanding derivative contracts

Asset Derivatives	Balance Sheet Locations	June 30, 2017		December 31, 2016
Derivatives designated as hedging instruments:
Foreign exchange contracts	Other current assets	$	232	$	670
Natural gas contracts	Other current assets		66		255
Foreign exchange contracts	Other assets		2		179
Natural gas contracts	Other assets		5		43
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Other current assets		557		21
Total asset derivatives		$	862	$	1,168

Liability Derivatives	Balance Sheet Locations	June 30, 2017		December 31, 2016
Derivatives designated as hedging instruments:
Foreign exchange contracts	Accounts payable and accrued liabilities	$	412	$	30
Natural gas contracts	Accounts payable and accrued liabilities		96		—
Foreign exchange contracts	Accrued pension and other liabilities		93		1
Natural gas contracts	Accrued pension and other liabilities		91		—
Interest rate swap contract	Accrued pension and other liabilities		397		—
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Accounts payable and accrued liabilities		169		1,421
Total liability derivatives		$	1,258	$	1,452

Schedule of outstanding derivative contracts

(in thousands except for millions of British Thermal Units (mmbtu))	June 30, 2017		December 31, 2016
Natural gas contracts (mmbtu)		1,470,000		540,000
Foreign exchange contracts	$	61,610	$	199,420
Interest rate swap contract	$	50,000	$	—

Schedule of gross and net amounts of derivative assets and liabilities

	June 30, 2017				December 31, 2016
	Fair Value		Fair Value		Fair Value		Fair Value
	of Assets		of Liabilities		of Assets		of Liabilities
Gross derivative amounts recognized in the balance sheet	$	862	$	1,258	$	1,168	$	1,452
Gross derivative amounts not offset in the balance sheet that are eligible for offsetting		(473)		(473)		(52)		(52)
Net amount	$	389	$	785	$	1,116	$	1,400

Schedule of amount of gain or (loss) on derivatives recognized in OCI and reclassified from accumulated OCI into earnings (effective portion)

	Amount of Gain or (Loss) Recognized
	in OCI on Derivatives (Effective Portion)
	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Foreign exchange contracts	$	(569)	$	(407)	$	(1,054)	$	(1,446)
Natural gas contracts		(140)		398		(369)		207
Interest rate swap contract		(489)		—		(489)		—
Total	$	(1,198)	$	(9)	$	(1,912)	$	(1,239)

	Amount of Gain or (Loss) Recognized from
	Accumulated OCI into Earnings (Effective Portion) (1)
	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Foreign exchange contracts	$	66	$	153	$	143	$	434
Natural gas contracts		15		(315)		27		(590)
Interest rate swap contract		(92)		—		(92)		—
Total	$	(11)	$	(162)	$	78	$	(156)

(1) Assuming market rates remain constant with the rates as of June 30, 2017, a gain of $0.2 million is expected to be recognized in earnings over the next 12 months.

Schedule of fair value gains and losses on derivative contracts not qualified for hedge accounting treatment

	Amount of Gain or (Loss) Recognized in Earnings on Derivatives
	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Foreign exchange contracts	$	(7,639)	$	(262)	$	(9,275)	$	1,290
Total	$	(7,639)	$	(262)	$	(9,275)	$	1,290