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Goodwill And Other Intangible Assets
6 Months Ended
Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill And Other Intangible Assets
Goodwill and Other Intangible Assets
We are required to review goodwill and indefinite-lived intangible assets annually for impairment. Goodwill impairment is tested at the graphite electrodes reporting unit level on an annual basis and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value.
The following tables represents the changes in the carrying value of goodwill and intangibles during three months ended June 30, 2017:
Goodwill
Balance as of December 31, 2016
$
171,117

   Adjustments

Balance as of June 30, 2017
$
171,117


Intangible Assets
 
As of December 31, 2016
 
As of June 30, 2017
 
Gross
Carrying
Amount
 
Accumulated
Amortization & Impairment
 
Net
Carrying
Amount
 
Gross
Carrying
Amount
 
Accumulated
Amortization & Impairment
 
Net
Carrying
Amount
 
(Dollars in Thousands)
Trade name
$
22,500

 
$
(3,235
)
 
$
19,265

 
$
22,500

 
$
(4,386
)
 
$
18,114

Technological know-how
55,300

 
(10,397
)
 
44,903

 
55,300

 
(13,949
)
 
41,351

Customer –related
    intangible
64,500

 
(6,177
)
 
58,323

 
64,500

 
(8,412
)
 
56,088

Total finite-lived
    intangible assets
$
142,300

 
$
(19,809
)
 
$
122,491

 
$
142,300

 
$
(26,747
)
 
$
115,553


Amortization expense of acquired intangible assets was $3.6 million and $7.2 million in the three and six months ended June 30, 2016 and $3.5 million and $6.9 million in the three and six months ended June 30, 2017. Estimated amortization expense will approximate $6.7 million in the remainder of 2017, $12.9 million in 2018, $12.2 million in 2019, $11.4 million in 2020 and $10.7 million in 2021.