Restructuring Costs - Schedule of Restructuring Reserve by Cost Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		21 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 152	$ 403	$ 3,620	$ 403	$ 7,859
Severance and related charges
Restructuring Cost and Reserve [Line Items]
Restructuring expense	150		1,868		6,107
Facility relocation and closure charges
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 2		$ 1,752		$ 1,752