Commitments and Contingences (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Operating Leases
Total lease liability	$ 8,397		$ 8,495
Right-of-use assets	$ 8,257		8,382
Weighted average remaining lease term	18 years 8 months 12 days
Weighted average discount rate	3.50%
Lease cost	$ 198		$ 231
Operating lease, payments	$ 172	$ 183
Minimum [Member]
Operating Leases
Remaining lease term	1 year 4 months 24 days
Maximum [Member]
Operating Leases
Remaining lease term	25 years