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Restructuring Charges Restructuring Charges (Tables)
 9 Months Ended
Sep. 30, 2017
Restructuring and Related Activities [Abstract]  
Roll-Forward of Accrued Restructuring Expense
A roll-forward of the remaining accrued restructuring expense for the nine months ended September 30, 2017 is as follows:
(Dollars in thousands)
Severance expenses
 
Write-downs and retirements of fixed assets
 
Lease cancellations
 
Total
Accrued at January 1, 2017
$
901

 
$
228

 
$
81

 
$
1,210

Payments
(832
)
 
—

 
(51
)
 
(883
)
Non-cash settlement
—

 
(228
)
 
—

 
(228
)
Accrued at September 30, 2017
$
69

 
$
—

 
$
30

 
$
99