Long-Term Debt (Components Of Long-Term Debt) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2019 USD ($) consecutive_years $ / shares	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Long-term debt	$ 4,053,000	$ 4,053,000
Trust Preferred Securities Liquidation Value | $ / shares	$ 1,000
Junior Subordinated Debenture Redemption Multiple	$ 1,000
Repayment Price Junior Subordinated Deferrable Interest Debentures	100.00%
Subordinated Borrowing, Interest Rate Spread Over 3Month LIBOR	1.83%	1.83%
Junior subordinated debentures, interest rate	4.43%	4.64%
Junior subordinated debentures, due date	Dec. 22, 2036	Dec. 22, 2036
Town Square Statutory Trust I
Debt Instrument [Line Items]
Long-term debt	$ 4,124,000	$ 4,124,000
Debt Instrument, Unamortized Discount	$ (71,000)	$ (71,000)
Maximum
Debt Instrument [Line Items]
Threshold Period for Discontinuance of Interest Accrual | consecutive_years	5