Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease cost	$ 2,600
Other lease costs and income:
Variable lease costs	775
Sublease income	(945)
Total net lease cost	2,430
ROU asset impairment	$ 555	$ 0