Leases - Quantitative Lease Data (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Finance Lease Amounts:
Right-of-Use Assets	$ 4,859	$ 5,036	$ 4,859	$ 5,036
Lease Liabilities	5,181	5,228	5,181	5,228	$ 5,217
Operating Lease Amounts:
Right-of-Use Assets	6,786	5,496	6,786	5,496
Lease Liabilities	$ 6,965	$ 5,577	6,965	5,577
Cash Paid For Amounts Included In The Measurement Of Lease Liabilities:
Operating Outgoing Cash Flows From Finance Leases			146	148
Operating Outgoing Cash Flows From Operating Leases			571	567
Financing Outgoing Cash Flows From Finance Leases			36	26
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			$ 2,126	$ 294
Weighted-average Remaining Lease Term - Finance Leases (Yrs.)	28 years 5 months 15 days	29 years 4 months 24 days	28 years 5 months 15 days	29 years 4 months 24 days
Weighted-average Remaining Lease Term - Operating Leases (Yrs.)	11 years 9 months 3 days	13 years 1 month 6 days	11 years 9 months 3 days	13 years 1 month 6 days
Weighted-average Discount Rate—Finance Leases	3.75%	3.75%	3.75%	3.75%
Weighted-average Discount Rate—Operating Leases	2.85%	3.27%	2.85%	3.27%
Finance Lease Cost:
Reduction of Right-of-Use Assets	$ 44	$ 44	$ 133	$ 133
Interest on Lease Liabilities	48	49	146	148
Operating Lease Cost	238	214	737	624
Short-term Lease Cost	15	11	28	32
Variable Lease Cost	69	77	203	165
Total Lease Cost	$ 414	$ 395	$ 1,247	$ 1,102