Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Derivative Instruments

Schedule of fair value of outstanding derivative contracts

		December 31
Asset Derivatives	Balance Sheet Locations	2016		2015
Derivatives designated as hedging instruments:
Foreign exchange contracts	Other current assets	$	670	$	411
Natural gas contracts	Other current assets		255		—
Foreign exchange contracts	Other assets		179		6
Natural gas contracts	Other assets		43		—
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Other current assets		21		51
Total asset derivatives		$	1,168	$	468

		December 31
Liability Derivatives	Balance Sheet Locations	2016		2015
Derivatives designated as hedging instruments:
Foreign exchange contracts	Accounts payable and accrued liabilities	$	30	$	13
Natural gas contracts	Accounts payable and accrued liabilities		—		586
Foreign exchange contracts	Accrued pension and other liabilities		1		3
Natural gas contracts	Accrued pension and other liabilities		—		89
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Accounts payable and accrued liabilities		1,421		92
Total liability derivatives		$	1,452	$	783

Schedule of outstanding derivative contracts

	December 31
(in thousands except for mmbtu)	2016		2015		2014
Natural gas contracts (mmbtu)		540,000		955,000		810,000
Foreign exchange contracts	$	199,420	$	37,016	$	41,237

Schedule of gross and net amounts of derivative assets and liabilities

	December 31, 2016				December 31, 2015
	Fair Value		Fair Value		Fair Value		Fair Value
	of Assets		of Liabilities		of Assets		of Liabilities
Gross derivative amounts recognized in the balance sheet	$	1,168	$	1,452	$	468	$	783
Gross derivative amounts not offset in the balance sheet that are eligible for offsetting		(52)		(52)		(67)		(67)
Net amount	$	1,116	$	1,400	$	401	$	716

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)
	Year Ended December 31
	2016		2015		2014
Foreign exchange contracts	$	399	$	647	$	2,095
Natural gas contracts		835		(984)		(782)
Total	$	1,234	$	(337)	$	1,313

	Amount of Gain or (Loss) Recognized from
	Accumulated OCI into Earnings (Effective Portion) (1)
	Year Ended December 31
	2016		2015		2014
Foreign exchange contracts	$	206	$	2,077	$	484
Natural gas contracts		(339)		(941)		221
Total	$	(133)	$	1,136	$	705

(1) Assuming market rates remain constant with the rates as of December 31, 2016, a gain of $0.1 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
	Year Ended December 31
	2016		2015		2014
Foreign exchange contracts	$	4,425	$	(1,042)	$	(511)
Total	$	4,425	$	(1,042)	$	(511)