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Restructuring and Other Charges (Tables)
 12 Months Ended
Dec. 31, 2014
Restructuring and Related Activities [Abstract]  
Movements in Restructuring and Related Accruals
Movements in related accruals during 2012, 2013 and 2014 are as follows: 
(DOLLARS IN THOUSANDS)
Employee-
Related
 
Pension
 
Asset -
Related/and
Other
 
Total
Balance at January 1, 2012
$
10,774

 
$
—

 
$
—

 
$
10,774

Additional charges (reversals), net
1,376

 
292

 
—

 
1,668

Non-cash charges
—

 
(292
)
 
—

 
(292
)
Payments and other costs
(9,001
)
 
—

 
—

 
(9,001
)
Balance at December 31, 2012
3,149

 
—

 
—

 
3,149

Additional charges (reversals), net
2,151

 
—

 
5,250

 
7,401

Non-cash charges
—

 
—

 
(5,250
)
 
(5,250
)
Payments and other costs
(3,184
)
 
—

 
—

 
(3,184
)
Balance at December 31, 2013
2,116

 
—

 
—

 
2,116

Additional charges (reversals), net
(46
)
 
—

 
6,444

 
6,398

Non-cash charges


 
—

 
(5,100
)
 
(5,100
)
Payments and other costs
(1,311
)
 
—

 
(1,344
)
 
(2,655
)
Balance at Balance at December 31, 2014
$
759

 
$
—

 
$
—

 
$
759