Leases - Lease Cost and Other Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Cash Flow, Operating Activities, Lessee [Abstract]
Cash paid for operating lease liabilities	$ 22,225	$ 20,554
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 3,501	$ 14,547
Weighted average remaining lease term:
Weighted average remaining lease term for operating leases	4 years 4 months 24 days		4 years 6 months
Operating Leases, Weighted Average Discount Rate, Percent [Abstract]
Weighted average discount rate for operating leases	2.60%		2.60%