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Leases (Narrative) (Details)
9 Months Ended
Sep. 30, 2020
Lessee, Lease, Description [Line Items]  
Option to extend, additional periods 5 years
Minimum [Member]  
Lessee, Lease, Description [Line Items]  
Remaining lease term 1 year
Maximum [Member]  
Lessee, Lease, Description [Line Items]  
Remaining lease term 20 years
Renewal period 20 years