Restructuring Charges (Tables)

12 Months Ended

Dec. 31, 2018

Restructuring Charges

Schedule of restructuring accrual activities

	Personnel		Facility
	Severance and		Related Costs
	Related Costs		and Other		Total
	(in thousands)
Balance - December 31, 2015	$	824	$	—	$	824
Provision		4,544		1,098		5,642
Changes in estimate		(2)		—		(2)
Payments		(3,570)		(1,098)		(4,668)
Balance - December 31, 2016		1,796		—		1,796
Provision		4,714		5,257		9,971
Payments		(4,990)		(5,257)		(10,247)
Balance - December 31, 2017		1,520		—		1,520
Provision		4,681		2,714		7,395
Payments		(4,058)		(2,644)		(6,702)
Balance - December 31, 2018	$	2,143	$	70	$	2,213