Leases - Quantitative Lease Data (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Finance Lease Amounts:
Right-of-Use Assets	$ 4,903	$ 5,080	$ 4,903	$ 5,080
Lease Liabilities	5,193	5,239	5,193	5,239	$ 5,217
Operating Lease Amounts:
Right-of-Use Assets	5,661	5,640	5,661	5,640
Lease Liabilities	$ 5,832	$ 5,718	5,832	5,718
Cash Paid For Amounts Included In The Measurement Of Lease Liabilities:
Operating Outgoing Cash Flows From Finance Leases			98	99
Operating Outgoing Cash Flows From Operating Leases			383	355
Financing Outgoing Cash Flows From Finance Leases			24	15
Right-of-Use Assets Obtained In Exchange For New Finance Lease Liabilities			0	0
Right-of-Use Assets Obtained In Exchange For New Operating Lease Liabilities			$ 805	$ 269
Weighted-average Remaining Lease Term - Finance Leases (Yrs.)	28 years 8 months 12 days	29 years 8 months 12 days	28 years 8 months 12 days	29 years 8 months 12 days
Weighted-average Remaining Lease Term - Operating Leases (Yrs.)	12 years 1 month 24 days	13 years 2 months 12 days	12 years 1 month 24 days	13 years 2 months 12 days
Weighted-average Discount Rate—Finance Leases	3.75%	3.75%	3.75%	3.75%
Weighted-average Discount Rate—Operating Leases	3.08%	3.27%	3.08%	3.27%
Finance Lease Cost:
Reduction of Right-of-Use Assets	$ 45	$ 45	$ 89	$ 89
Interest on Lease Liabilities	49	49	98	99
Operating Lease Cost	290	203	499	410
Short-term Lease Cost	8	14	13	21
Variable Lease Cost	30	33	134	88
Total Lease Cost	$ 422	$ 344	$ 833	$ 707