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Market Risks and Derivative Hedge Contracts Market Risks and Derivative Hedge Contracts (Tables)
 6 Months Ended
Jun. 30, 2015
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
 
$
2,403

 
1.12
 
7/17/2015
Forward purchase pounds sterling
 
$
7,491

 
1.57
 
7/17/2015
Forward sale Canadian dollar
 
$
2,918

 
1.25
 
7/17/2015
Forward sale Mexican peso
 
$
7,617

 
15.71
 
7/17/2015
Forward sale Norwegian krone
 
$
1,640

 
7.84
 
7/17/2015
Forward sale Saudi Arabia Riyal
 
$
1,000

 
3.75
 
7/17/2015
Forward sale Canadian dollar
 
$
780

 
1.25
 
7/17/2015
Forward sale Mexican peso
 
$
2,066

 
15.71
 
7/17/2015
Derivatives Designated as Hedging Instruments Table
Foreign currency derivative instruments
Balance Sheet Location
 
 Fair Value at
June 30, 2015
 
 Fair Value at December 31, 2014

 

 
(In Thousands)
Forward purchase contracts
 
Current assets
 
$
128

 
$
—

Forward sale contracts
 
Current liabilities
 
(115
)
 
(91
)
Forward purchase contracts
 
Current liabilities
 
(30
)
 
(83
)
Net liability
 

 
$
(17
)
 
$
(174
)