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Goodwill And Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule Of Changes In The Carrying Value Of Goodwill
 
Total
 
(Dollars in Thousands)
Balance as of December 31, 2016
$
171,117

   Adjustments
—

Balance as of December 31, 2017
171,117

   Adjustments
—

Balance as of December 31, 2018
$
171,117
Schedule Of Intangible Assets With Determinable Useful Lives By Major Category
The following table summarizes acquired intangible assets with determinable useful lives by major category which are included in "Other Assets" on our consolidated balance sheets:
 
As of December 31, 2018
 
As of December 31, 2017
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
(Dollars in Thousands)
Trade name
$
22,500

 
$
(7,721
)
 
$
14,779

 
$
22,500

 
$
(5,512
)
 
$
16,988

Technology and know-how
55,300

 
(23,503
)
 
31,797

 
55,300

 
(17,265
)
 
38,035

Customer related intangible
64,500

 
(15,070
)
 
49,430

 
64,500

 
(10,637
)
 
53,863

Total finite-lived intangible assets
$
142,300

 
$
(46,294
)
 
$
96,006

 
$
142,300

 
$
(33,414
)
 
$
108,886