Restructuring Charges (Tables)

12 Months Ended

Dec. 31, 2016

Restructuring and Related Activities [Abstract]

Roll Forward of Accrued Restructuring Expense

A roll-forward of the accrued restructuring expense is as follows:

(Dollars in thousands)	Severance expenses			Write-downs and retirements of fixed assets			Lease cancellations			Total
Accrued at January 1, 2016	$	—		$	228		$	834		$	1,062
Restructuring charges	1,207			409			115			1,731
Payments	(306		)	—			(868		)	(1,174		)
Accelerated depreciation	—			(409		)	—			(409		)
Accrued at December 31, 2016	$	901		$	228		$	81		$	1,210