Securities (Narrative) (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) security	Dec. 31, 2015 USD ($) security	Dec. 31, 2014 USD ($) security
Schedule of Trading Securities and Other Trading Assets [Line Items]
Asset-backed securities pledged to secure certain deposits	$ 21,500,000	$ 21,400,000
Asset-backed securities pledged as collateral	1,600,000	1,900,000
Amount	157,830,000	139,360,000
Amortized cost, available for sale	54,565,000	35,530,000
Held To Maturity Securities	109,247,000	109,420,000
Gain (Loss) On Sale Of Securities, Net	31,000	4,000	$ 19,000
Securities held to maturity (HTM), at amortized cost	109,247,000	109,420,000
Securities available for sale (AFS), at fair value	53,033,000	35,116,000
Estimated Fair Value, held to maturity	108,034,000	109,309,000
Gross unrealized losses, available for sale	1,577,000	557,000
Fair value of AFS Securities with unrealized losses		22,000,000
Fair value of HTM Securities with unrealized losses	85,000,000	53,800,000
Gross unrealized losses, held to maturity	1,715,000	941,000
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Held-to-maturity Securities	0	0	0
Five Available For Sale Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Gross realized gains on sale of AFS securities	23,000		8,000
Securities available for sale (AFS), at fair value	$ 6,500,000		$ 2,100,000
Number Of Available For Sale Securities Sold | security	5		5
An Available For Sale Security Agency Bond [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Gross realized gains on sale of AFS securities		5,000
Securities available for sale (AFS), at fair value		2,000,000
One Held To Maturity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Held To Maturity Securities	$ 698,000	67,000
Gross realized gains on sale of HTM securities	8,000	(1,000)
Securities held to maturity (HTM), at amortized cost	$ 698,000	$ 67,000
Number Of Held To Maturity Securities Sold | security	1	1
Twelve Held To Maturity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Held To Maturity Securities			$ 4,200,000
Gross realized gains on sale of HTM securities			11,000
Securities held to maturity (HTM), at amortized cost			$ 4,200,000
Number Of Held To Maturity Securities Sold | security			12
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	$ 4,377,000	$ 22,000
Held To Maturity Securities	34,735,000	34,085,000
Securities held to maturity (HTM), at amortized cost	34,735,000	34,085,000
Securities available for sale (AFS), at fair value	4,183,000	26,000
Estimated Fair Value, held to maturity	34,533,000	34,395,000
Gross unrealized losses, available for sale	194,000
Gross unrealized losses, held to maturity	569,000	242,000
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	35,176,000	31,182,000
Held To Maturity Securities	63,060,000	73,492,000
Securities held to maturity (HTM), at amortized cost	63,060,000	73,492,000
Securities available for sale (AFS), at fair value	34,228,000	30,664,000
Estimated Fair Value, held to maturity	62,393,000	73,171,000
Gross unrealized losses, available for sale	966,000	557,000
Fair value of AFS Securities with unrealized losses	46,100,000
Gross unrealized losses, held to maturity	802,000	$ 599,000
Asset-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available for sale securities, average life		4 years 4 months 21 days
Available for sale securities, average duration		4 years 15 days
Held to maturity securities, average life		5 years 26 days
Held to maturity securities, average duration		4 years 6 months 29 days
Amortized cost, available for sale	50,100,000
Fair value of HTM Securities with unrealized losses	$ 84,200,000
Asset-backed Securities, Issued by Private Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Held to maturity securities with unrealized losses, average life	4 years 1 month 24 days	4 years 15 days
Held to maturity securities with unrealized losses, average duration	3 years 3 months 15 days	3 years 3 months 15 days
Held To Maturity Securities	$ 884,000	$ 1,100,000
Securities held to maturity (HTM), at amortized cost	884,000	1,100,000
Fair value of HTM Securities with unrealized losses	803,000	993,000
Gross unrealized losses, held to maturity	$ 81,000	$ 100,000
Asset-backed securities issued by GSEs [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available for sale securities, average life	4 years 11 months 16 days
Available for sale securities, average duration	4 years 5 months 5 days
Held to maturity securities, average life	5 years 3 months 18 days
Held to maturity securities, average duration	4 years 8 months 16 days
Available for sale securities with unrealized losses, average life	4 years 10 months 28 days	4 years 5 months 12 days
Available for sale securities with unrealized losses, average duration	4 years 4 months 13 days	4 years 15 days
Held to maturity securities with unrealized losses, average life	5 years 22 days	5 years 5 months 1 day
Held to maturity securities with unrealized losses, average duration	4 years 5 months 27 days	4 years 9 months 11 days
Amortized cost, available for sale		$ 31,200,000
Held To Maturity Securities	$ 108,400,000	107,600,000
Securities held to maturity (HTM), at amortized cost	108,400,000	107,600,000
Gross unrealized losses, available for sale	1,600,000	557,000
Fair value of HTM Securities with unrealized losses		52,800,000
Gross unrealized losses, held to maturity	1,600,000	841,000
Residential Collateralized Mortgage Obligations, Issued By Private Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Held To Maturity Securities	884,000	1,093,000
Securities held to maturity (HTM), at amortized cost	884,000	1,093,000
Estimated Fair Value, held to maturity	803,000	993,000
Gross unrealized losses, held to maturity	81,000	100,000
Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Held To Maturity Securities	105,396,000	108,670,000
Securities held to maturity (HTM), at amortized cost	105,396,000	108,670,000
Estimated Fair Value, held to maturity	104,193,000	108,559,000
Gross unrealized losses, held to maturity	1,705,000	941,000
Corporate Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	37,000	37,000
Securities available for sale (AFS), at fair value	37,000	39,000
Bond Mutual Funds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	4,386,000	4,289,000
Securities available for sale (AFS), at fair value	4,413,000	4,387,000
US Government Obligations [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Held To Maturity Securities	850,000	750,000
Securities held to maturity (HTM), at amortized cost	850,000	750,000
Estimated Fair Value, held to maturity	$ 850,000	$ 750,000
Standard Poor's, AAA Rating [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Percentage of asset backed securities in investment portfolio	99.00%	99.00%
Amount	$ 156,947,000	$ 138,267,000
Standard Poor's, BB Rating [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amount	411,000	518,000
Standard Poor's, B+ Rating [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amount	$ 472,000	$ 575,000