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Fair Value Measurements
3 Months Ended
Mar. 31, 2018
Fair Value Disclosures [Abstract]  
Fair Value Measurements
Fair Value Measurements
The accounting guidance for fair value measurements establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value:
Level 1 – Quoted prices in active markets for identical assets or liabilities.
Level 2 – Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
From time to time we enter into various instruments that require fair value measurement, including foreign currency contracts, copper derivative contracts and interest rate swaps. Derivative instruments measured at fair value on a recurring basis, categorized by the level of inputs used in the valuation, include:
 
Derivative Instruments at Fair Value as of March 31, 2018
(Dollars in thousands)
Level 1
 
Level 2
 
Level 3
 
Total
Foreign currency contracts
$

 
$
(329
)
 
$

 
$
(329
)
Copper derivative contracts
$

 
$
1,105

 
$

 
$
1,105

Interest rate swap
$

 
$
1,030

 
$

 
$
1,030

 
Derivative Instruments at Fair Value as of December 31, 2017
(Dollars in thousands)
Level 1
 
Level 2
 
Level 3
 
Total
Foreign currency contracts
$

 
$
(396
)
 
$

 
$
(396
)
Copper derivative contracts
$

 
$
2,016

 
$

 
$
2,016

Interest rate swap
$

 
$
41

 
$

 
$
41