Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
Amount of leases not yet commenced	$ 13,932
Rent expense under operating leases	$ 127,990
Rent expense under operating leases		$ 143,513	$ 145,176
Minimum
Lessee, Lease, Description [Line Items]
Term of lease contracts (in years)	1 year
Term of lease contracts, majority (in years)	1 year
Lease extensions (in years)	3 years
Maximum
Lessee, Lease, Description [Line Items]
Term of lease contracts (in years)	60 years
Term of lease contracts, majority (in years)	8 years
Lease extensions (in years)	10 years