Leases - Quantitative Lease Data (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Finance Lease Amounts:
Right-of-use Assets	$ 5,080	$ 5,226	$ 5,080	$ 5,226
Lease Liabilities	5,239	5,270	5,239	5,270	$ 5,254
Operating Lease Amounts:
Right-of-use Assets	5,640	5,859	5,640	5,859
Lease Liabilities	$ 5,718	$ 5,918	5,718	5,918
Cash Paid For Amounts Included In The Measurement Of Lease Liabilities:
Operating Outgoing Cash Flows From Finance Leases			99	43
Operating Outgoing Cash Flows From Operating Leases			355	355
Financing Outgoing Cash Flows From Finance Leases			15	12
Right-of-use Assets Obtained In Exchange For New Finance Lease Liabilities			0	5,271
Right-of-use Assets Obtained In Exchange For New Operating Lease Liabilities			$ 269	$ 6,147
Weighted-average Remaining Lease Term—Finance Leases (Yrs.)	29 years 8 months 12 days	31 years 3 months 18 days	29 years 8 months 12 days	31 years 3 months 18 days
Weighted-average Remaining Lease Term—Operating Leases (Yrs.)	13 years 2 months 12 days	14 years 1 month 6 days	13 years 2 months 12 days	14 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	3.27%	3.47%	3.27%	3.47%
Finance Lease Cost:
Reduction of Right-of-use assets	$ 45	$ 27	$ 89	$ 44
Interest on Lease Liabilities	49	28	99	43
Operating Lease Cost	203	193	410	366
Short-term Lease Cost	14	23	21	56
Variable Lease Cost	33	39	88	95
Total Lease Cost	$ 344	$ 310	$ 707	$ 604