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Leases - Summary of Supplemental Balance Sheet Information Related to Leases (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]      
Operating lease right-of-use assets $ 262,196 $ 266,864 $ 286,194
Operating lease liabilities $ 262,169 $ 266,846 $ 285,991
Weighted average remaining lease term 16 years 16 years 17 years
Weighted average discount rate% 3.08% 3.12% 3.23%