Restructuring Expenses - Components of Restructuring Expenses (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Restructuring Reserve [Roll Forward]
Accrued restructuring, beginning of period	$ 797
Payments	(329)
Accrued restructuring, end of period	468
Workforce reduction
Restructuring Reserve [Roll Forward]
Accrued restructuring, beginning of period	797
Payments	(329)
Accrued restructuring, end of period	468
Contract termination
Restructuring Reserve [Roll Forward]
Accrued restructuring, beginning of period	0
Payments	0
Accrued restructuring, end of period	0
Other
Restructuring Reserve [Roll Forward]
Accrued restructuring, beginning of period	0
Payments	0
Accrued restructuring, end of period	$ 0