Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ 1,646
Restructuring Reserve [Roll Forward]
Accrued Charges at beginning of period	1,315	4,685
Cost incurred		1,646
Costs paid	(434)	(1,986)
Accrued Charges at end of period	881	4,345
Severance Charges
Restructuring Reserve [Roll Forward]
Accrued Charges at beginning of period	526	3,896
Cost incurred		1,646
Costs paid	(434)	(1,986)
Accrued Charges at end of period	92	3,556
Other Associated Costs
Restructuring Reserve [Roll Forward]
Accrued Charges at beginning of period	789	789
Cost incurred		0
Costs paid	0	0
Accrued Charges at end of period	$ 789	$ 789