Restructurings - Components of Restructuring Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Total restructuring expense	$ 0	$ 0	$ 0	$ 592
Total Restructuring Expense
Restructuring Cost and Reserve [Line Items]
Total restructuring expense	0	0	0	592
Operating expenses
Restructuring Cost and Reserve [Line Items]
Employee severance and benefits	$ 0	$ 0	$ 0	$ 592