Restructuring Charges (Tables)

6 Months Ended

Jun. 30, 2018

Restructuring And Related Activities [Abstract]

Changes to Restructuring Liability by Major Restructuring Activity

Changes to the restructuring liability by major restructuring activity are as follows:

	GES						Other Restructurings
(in thousands)	Severance & Employee Benefits			Facilities			Severance & Employee Benefits			Total
Balance at December 31, 2017	$	1,551		$	807		$	191		$	2,549
Restructuring charges		694			—			130			824
Cash payments		(694	)		(38	)		(295	)		(1,027	)
Adjustment to liability		437			(451	)		(14	)		(28	)
Balance at June 30, 2018	$	1,988		$	318		$	12		$	2,318