Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of restructuring costs

Reconciliations of the beginning and ending total restructuring liability balances are presented below:

	Year Ended December 31,
	2017						2016						2015
	(amounts in thousands)
	On-Going Benefit Costs			Exit Costs			On-Going Benefit Costs			Exit Costs			On-Going Benefit Costs			Exit Costs
Balance at beginning of period	$	325		$	273		$	44		$	338		$	—		$	—
Charged to restructuring costs	522			504			563			190			633			641
Payments	(760		)	(336		)	(282		)	(255		)	(589		)	(303		)
Balance at end of period	$	87		$	441		$	325		$	273		$	44		$	338