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Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended	12 Months Ended
Restructuring (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Dec. 31, 2019
Restructuring [Abstract]
Non-cash impairment charges					$ 48,600
Cash charges associated with restructuring					22,100
Employee severance					20,100
Other related restructuring charges					2,000
Restructuring Reserve [Roll Forward]
Beginning balance			$ 15,462		$ 15,462
Amounts paid			(15,046)
Adjustments			(416)
Ending balance			$ 0
Restructuring activity	$ 0	$ 0		$ 0