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Restructuring (Tables)
 6 Months Ended
Jun. 30, 2017
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs
Severance activity related to the headquarters relocation is presented in the table below for the six months ended June 30, 2017:
(Dollars in thousands)
Severance related to headquarters relocation
Balance at December 31, 2016
$
470

Provisions
320

Payments
(566
)
Balance at June 30, 2017
$
224