Leases (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Oct. 01, 2019
Lessee, Lease, Description [Line Items]
Right-of-use asset, amount	$ 14,700	$ 15,700
Right-of-use asset, balance sheet location	us-gaap:OtherAssets
Lease liability, amount	$ 14,713	$ 15,500
Lease liability, balance sheet location	us-gaap:AccountsPayableAndOtherAccruedLiabilities	us-gaap:AccountsPayableAndOtherAccruedLiabilities
Operating leases, weighted average remaining lease term	23 years 6 months
Operating leases, weighted average discount rate	2.59%
Minimum [Member]
Lessee, Lease, Description [Line Items]
Operating leases, remaining term	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Operating leases, remaining term	47 years