Securities (Fair Value to Amortized Cost Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	$ 69,928	$ 54,565
Gross unrealized gains, available for sale	39	45
Gross unrealized losses, available for sale	1,682	1,577
Estimated fair value, available for sale	68,285	53,033
Amortized cost, Held-to-maturity Securities	99,246	109,247
Gross unrealized gains, held to maturity	197	502
Gross unrealized losses, held to maturity	1,436	1,715
Estimated Fair Value, held to maturity	98,007	108,034
Residential Mortgage Backed Securities Issued By US Government Sponsored Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	7,265	4,377
Gross unrealized losses, available for sale	178	194
Estimated fair value, available for sale	7,087	4,183
Amortized cost, Held-to-maturity Securities	29,113	34,735
Gross unrealized gains, held to maturity	135	367
Gross unrealized losses, held to maturity	261	569
Estimated Fair Value, held to maturity	28,987	34,533
Residential Collateralized Mortgage Obligations, Issued By US Government Sponsored Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	45,283	35,176
Gross unrealized gains, available for sale	12	18
Gross unrealized losses, available for sale	1,158	966
Estimated fair value, available for sale	44,137	34,228
Amortized cost, Held-to-maturity Securities	54,805	63,060
Gross unrealized gains, held to maturity	62	135
Gross unrealized losses, held to maturity	845	802
Estimated Fair Value, held to maturity	54,022	62,393
US Agency [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	12,863	10,589
Gross unrealized losses, available for sale	346	417
Estimated fair value, available for sale	12,517	10,172
Amortized cost, Held-to-maturity Securities	8,660	6,717
Gross unrealized losses, held to maturity	235	253
Estimated Fair Value, held to maturity	8,425	6,464
Residential Collateralized Mortgage Obligations, Issued By Private Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, Held-to-maturity Securities	651	884
Gross unrealized losses, held to maturity	52	81
Estimated Fair Value, held to maturity	599	803
US Government Agencies Callable Agency Bonds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, Held-to-maturity Securities	5,017	3,001
Gross unrealized losses, held to maturity	43	10
Estimated Fair Value, held to maturity	4,974	2,991
US Government Obligations [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, Held-to-maturity Securities	1,000	850
Estimated Fair Value, held to maturity	1,000	850
Corporate Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	37	37
Estimated fair value, available for sale	37	37
Bond Mutual Funds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	4,480	4,386
Gross unrealized gains, available for sale	27	27
Estimated fair value, available for sale	$ 4,507	$ 4,413

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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