SCHEDULE II Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2017

Valuation and Qualifying Accounts [Abstract]

SCHEDULE II Valuation and Qualifying Accounts

Valuation and Qualifying Accounts

(Dollars in thousands)	Balance at Beginning of Period		Charged to (Reduction of) Costs and Expenses			Taken Against Allowance			Other (Deductions) Recoveries		Balance at End of Period
Allowance for Doubtful Accounts
December 31, 2017	$	1,952	$	(275	)	$	(152	)	$	—	$	1,525
December 31, 2016	$	695	$	1,321		$	(64	)	$	—	$	1,952
December 31, 2015	$	476	$	1,085		$	(866	)	$	—	$	695

(Dollars in thousands)	Balance at Beginning of Period		Charged to (Reduction of) Costs and Expenses			Taken Against Allowance		Other (Deductions) Recoveries			Balance at End of Period
Valuation on Allowance for Deferred Tax Assets
December 31, 2017	$	6,388	$	2,366		$	—	$	—		$	8,754
December 31, 2016	$	6,202	$	186		$	—	$	—		$	6,388
December 31, 2015	$	7,691	$	(1,484	)	$	—	$	(5	)	$	6,202