Leases - Lease Cost and Other Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash Flow, Operating Activities, Lessee [Abstract]
Cash paid for operating lease liabilities	$ 84,569	$ 78,152
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 37,786	$ 32,170
Supplemental Balance Sheet Information
Weighted average remaining lease term for operating leases	4 years 6 months	4 years 9 months 18 days
Weighted average discount rate for operating leases	2.60%	3.00%