Leases (Narrative) (Details) $ in Millions	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Remaining lease terms for finance leases	4 years
Weighted-average discount rate of operating leases	3.10%
Weighted-average discount rate of finance leases	4.20%
Weighted-average remaining term of operating leases	5 years 2 months 12 days
Weighted-average remaining term of finance leases	4 years
Commitments under operating leases not yet commenced	$ 1.6
Term of operating leases not yet commenced	5 years
Minimum [Member]
Lessee, Lease, Description [Line Items]
Remaining lease terms for operating leases	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Remaining lease terms for operating leases	9 years