Leases - Quantitative Lease Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finance Lease Amounts:
Right-of-use Assets	$ 5,171
Lease Liabilities	5,254
Operating Lease Amounts:
Right-of-use Assets	5,644
Lease Liabilities	5,713
Cash Paid For Amounts Included In The Measurement Of Lease Liabilities:
Operating Outgoing Cash Flows From Finance Leases	99
Operating Outgoing Cash Flows From Operating Leases	779
Financing Outgoing Cash Flows From Finance Leases	28
Right-of-use Assets Obtained In Exchange For New Finance Lease Liabilities	5,271
Right-of-use Assets Obtained In Exchange For New Operating Lease Liabilities	$ 6,266
Weighted-average Remaining Lease Term—Finance Leases (Yrs.)	30 years 9 months 18 days
Weighted-average Remaining Lease Term—Operating Leases (Yrs.)	13 years 8 months 16 days
Weighted-average Discount Rate—Finance Leases %	3.75%
Weighted-average Discount Rate—Operating Leases %	3.35%
Finance Lease Cost:
Reduction in the Carrying Amount of Right-of-use assets	$ 100
Interest on Lease Liabilities	99	$ 0	$ 0
Operating Lease Cost	795
Short-term Lease Cost	85
Variable Lease Cost	205
Total Lease Cost	$ 1,284