Annual report pursuant to Section 13 and 15(d)

Operating Leases Lease, Cost (Details)

v3.20.4
Operating Leases Lease, Cost (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease expense $ 44,732,000 $ 42,863,000
Short-term lease expense (lease duration of twelve months or less at lease commencement) 24,585,000 22,992,000
Sublease income (35,038,000) (33,428,000)
Lease cost $ 34,279,000 $ 32,427,000