Leases (Details)	12 Months Ended
	Dec. 31, 2019 agreement item
Lessee, Lease, Description [Line Items]
Remaining lease term	14 years
Option to renew - lessee	true
Number of sublease agreements	4
Number of renewal options reasonably certain to be exercised | item	0
Number of sublease agreements - contingent upon renewal	2
Number of sublease agreements - exercised	2
Minimum
Lessee, Lease, Description [Line Items]
Renewal of lease period	1 year
Maximum
Lessee, Lease, Description [Line Items]
Renewal of lease period	20 years
Master Lease
Lessee, Lease, Description [Line Items]
Number Of Renewal Terms | item	2
Percentage Of Increase In Operating Lease Rent	3.00%
Renewal of lease period	10 years