Leases (Narrative) (Details) - USD ($)		3 Months Ended
	Jan. 01, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Right of use asset		$ 6,867,000		$ 7,155,000
Lease commitment liability		7,391,000		7,693,000
Reduction in retained earnings due to effect of adoption		36,913,000	$ 42,736,000	$ 48,756,000	$ 42,438,000
Increase (decrease) in other receivables		$ (29,618,000)	(3,894,000)
Weighted average remaining term		8 years 2 months 12 days
Weighted average discount rate		5.36%
Operating lease cash payments		$ 403,000
Cash payments to acquire right of use assets		0
Sublease Income		79,000	65,000
Rent expense		$ 378,000	390,000
Accounting Standards Update 2016-02 [Member]
Right of use asset	$ 8,416,000
Lease commitment liability	8,860,000
Increase (decrease) in other receivables	18,000
Reduction in other liabilities	$ (406,000)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-02 [Member]
Reduction in retained earnings due to effect of adoption			$ (20,000)