Fair Value of Financial Instruments (Narrative) (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) security	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gains or losses included in earnings attributable to the change in realized/unrealized gains or losses related to the assets	$ 0	$ 0
Amortized Cost	134,336,000		$ 135,008,000
Available-for-sale Securities	130,792,000		131,305,000
Fair value, assets, level 1 to level 2 transfers, amount	0	0
Fair value, assets, level 2 to level 1 transfer, amount	$ 0	$ 0
Collateralized debt obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquired trust preferred securities, number of securities | security	9
Amortized Cost	$ 18,470,000		18,443,000
Available-for-sale Securities	$ 12,380,000		$ 14,354,000