Leases (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	Jan. 01, 2019
Operating Lease, Weighted Average Remaining Lease Term	14 years
Lease, Cost	$ 3,773		$ 3,700
Operating lease right-of-use assets	26,792		0	$ 28,900
Operating lease liabilities	$ 28,861	[1]	$ 0	$ 30,900
Operating Lease, Weighted Average Discount Rate, Percent	3.67%
Number of operating leases not yet commenced	1
Minimum [Member]
Lease Expiration Period	4 months		5 months
Lessee, Operating Lease, Renewal Term	1 year
Maximum [Member]
Lease Expiration Period	21 years		22 years
Lessee, Operating Lease, Renewal Term	5 years

[1] Includes short-term operating lease liabilities of $2.5 million.