Market Risks and Derivative Hedge Contracts Market Risks and Derivative Hedge Contracts (Tables)

9 Months Ended

Sep. 30, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions Table

Derivative Contracts	US Dollar Notional Amount		Traded Exchange Rate	Settlement Date
	(In Thousands)
Forward purchase Euro	$	1,879	1.20	10/18/2017
Forward purchase pounds sterling	6,980		1.32	10/18/2017
Forward sale Canadian dollar	3,270		1.22	10/18/2017
Forward purchase Mexican peso	6,951		17.93	10/18/2017
Forward sale Norwegian krone	3,009		7.88	10/18/2017
Forward sale Mexican peso	5,088		17.93	10/18/2017

Derivatives Designated as Hedging Instruments Table

Foreign currency derivative instruments	Balance Sheet Location	Fair Value at September 30, 2017			Fair Value at December 31, 2016
		(In Thousands)
Forward sale contracts	Current assets	$	187		$	81
Forward purchase contracts	Current assets	88			—
Forward purchase contracts	Current liabilities	(161		)	(371		)
Net asset (liability)		$	114		$	(290	)