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Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
Restructuring (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0		$ 104	$ 855	$ 1,405
Severance Costs	6,700			9,200
Accounts Payable and Accrued Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 100			$ 100
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 900