Leases - Other Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Cash outflows for amounts included in the measurement of lease liabilities	$ 20,533	$ 21,491
Right-of-use assets obtained in exchange for lease obligations, net of modifications	$ 1,833	$ 21,579
Weighted-average remaining lease term (in years)	3 years 9 months 10 days	4 years 8 months 4 days
Weighted-average discount rate	3.10%	2.10%