Commitments and Contingences (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Operating Leases
Total lease liability	$ 8,296		$ 8,296		$ 8,495
Right-of-use assets	$ 8,132		$ 8,132		$ 8,382
Weighted average remaining lease term	18 years 6 months		18 years 6 months		18 years 9 months 18 days
Weighted average discount rate	3.51%		3.51%		3.50%
Operating lease cost	$ 198	$ 217	$ 397	$ 436
Cash paid for lease liability	$ 174	$ 186	$ 346	$ 368
Minimum
Operating Leases
Remaining lease term			1 year 2 months 12 days		0 years
Maximum
Operating Leases
Remaining lease term			25 years		25 years