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Leases (Narrative) (Details)
Jun. 30, 2019
Lessee, Lease, Description [Line Items]  
Weighted average remaining lease term 6 years 8 months 8 days
Weighted average discount rate 4.06%
Real Estate | Minimum  
Lessee, Lease, Description [Line Items]  
Lease renewal term 1 year
Real Estate | Maximum  
Lessee, Lease, Description [Line Items]  
Lease renewal term 20 years
Equipment | Minimum  
Lessee, Lease, Description [Line Items]  
Lease term 2 years
Equipment | Maximum  
Lessee, Lease, Description [Line Items]  
Lease term 8 years
One Class of Equipment  
Lessee, Lease, Description [Line Items]  
Lease term 15 years