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Goodwill and other intangible assets (Tables)
 6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
Schedule Of Changes In The Carrying Value Of Goodwill
The following tables represent the changes in the carrying value of goodwill and intangibles for the six months ended June 30, 2018:
Goodwill
(Dollars in thousands)
Balance as of December 31, 2017
$
171,117

   Adjustments
—

Balance as of June 30, 2018
$
171,117

                                                                                                                                                                                                          

 

 

 

 

​  

​  

​  

​

 

 

Total

 

​  

​ 

​  

​

 

 

(Dollars in thousands)

 

Balance as of December 31, 2015

 

$
172,059

 

Adjustments (See Note 2)

 
1,058

 

Goodwill transferred to discontinued operations

 
(2,000

)

​

​

​  

​

Balance as of December 31, 2016

 

$
171,117

 

Adjustments

 

—

 

​

​

​  

​

Balance as of December 31, 2017

 

$
171,117

 

​  

​  

​  

​

 

Schedule Of Intangible Assets With Determinable Useful Lives By Major Category
Intangible Assets
 
As of June 30, 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

 
$
(6,629
)
 
$
15,871

 
$
22,500

 
$
(5,512
)
 
$
16,988

Technological know-how
55,300

 
(20,502
)
 
34,798

 
55,300

 
(17,265
)
 
38,035

Customer –related
    intangible
64,500

 
(12,859
)
 
51,641

 
64,500

 
(10,637
)
 
53,863

Total finite-lived
    intangible assets
$
142,300

 
$
(39,990
)
 
$
102,310

 
$
142,300

 
$
(33,414
)
 
$
108,886

                                                                                                                                                                                                             

 

 

 

 

 

 

 

 

 

 

 

 

 

 

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​

 

 

As of December 31, 2017

 

As of December 31, 2016

 

​

​

​  

​ 

​  

​ 

​  

​

​  

​ 

​  

​ 

​  

​

 

 

Gross
carrying
amount

 

Accumulated
amortization

 

Net
carrying
amount

 

Gross
carrying
amount

 

Accumulated
amortization

 

Net
carrying
amount

 

​  

​ 

​  

​ 

​  

​ 

​  

​ 

​  

​ 

​  

​ 

​  

​

 

 

(Dollars in thousands)

 

Trade name

 

$
22,500

 

$
(5,512

)

$
16,988

 

$
22,500

 

$
(3,235

)

$
19,265

 

Technology and know-how

 
55,300

 
(17,265

)
38,035

 
55,300

 
(10,397

)
44,903

 

Customer related intangible

 
64,500

 
(10,637

)
53,863

 
64,500

 
(6,177

)
58,323

 

​

​

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​

Total finite-lived intangible assets

 

$
142,300

 

$
(33,414

)

$
108,886

 

$
142,300

 

$
(19,809

)

$
122,491

 

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​  

​