Securities (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) security	Dec. 31, 2017 USD ($) security	Dec. 31, 2016 USD ($) security
Schedule of Trading Securities and Other Trading Assets [Line Items]
Asset-backed securities pledged to secure certain deposits	$ 41,300,000	$ 31,500,000
Asset-backed securities pledged as collateral	3,300,000	4,000,000
Amount	216,247,000	162,987,000
Amortized cost, available for sale	122,524,000	69,808,000
Other-than temporary impairment charges	$ 0	0	$ 0
Number of securities sold | security	0
Gain (Loss) On Sale Of Securities, Net		175,000	31,000
Percentage of principal payment to sell securities using safe harbor rule	15.00%
Securities held to maturity (HTM), at amortized cost	$ 96,271,000	99,246,000
Securities available for sale (AFS), at fair value	119,976,000	68,164,000
Estimated Fair Value, held to maturity	93,745,000	98,007,000
Gross unrealized losses, available for sale	2,757,000	1,682,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	84,941,000	62,999,000
Held-To-Maturity Securities, Continuous Unrealized Loss Position, Fair Value	83,047,000	82,325,000
Gross unrealized losses, held to maturity	2,672,000	1,436,000
Three Available For Sale Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Gross realized gains on sale of AFS securities		9,000
Securities available for sale (AFS), at fair value		$ 3,700,000
Number Of Available For Sale Securities Sold | security		3
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
Securities available for sale (AFS), at fair value			$ 6,500,000
Number Of Available For Sale Securities Sold | security			5
One Held To Maturity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Gross realized gains on sale of HTM securities			$ 8,000
Securities held to maturity (HTM), at amortized cost			$ 698,000
Number Of Held To Maturity Securities Sold | security			1
Nine Held To Maturity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Gross realized gains on sale of HTM securities		$ 166,000
Securities held to maturity (HTM), at amortized cost		$ 4,800,000
Number Of Held To Maturity Securities Sold | security		9
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	7,641,000	$ 7,265,000
Securities held to maturity (HTM), at amortized cost	25,948,000	29,113,000
Securities available for sale (AFS), at fair value	7,361,000	7,087,000
Estimated Fair Value, held to maturity	25,267,000	28,987,000
Gross unrealized losses, available for sale	281,000	178,000
Gross unrealized losses, held to maturity	756,000	261,000
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	102,411,000	45,283,000
Securities held to maturity (HTM), at amortized cost	52,375,000	54,805,000
Securities available for sale (AFS), at fair value	100,740,000	44,137,000
Estimated Fair Value, held to maturity	51,079,000	54,022,000
Gross unrealized losses, available for sale	1,870,000	1,158,000
Gross unrealized losses, held to maturity	$ 1,360,000	$ 845,000
Asset-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Held to maturity securities with unrealized losses, average life	4 years 10 months 17 days	5 years 7 days
Held to maturity securities with unrealized losses, average duration	4 years 3 months 4 days	4 years 5 months 5 days
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 84,941,000	$ 62,999,000
Held-To-Maturity Securities, Continuous Unrealized Loss Position, Fair Value	$ 77,707,000	$ 81,726,000
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	3 years 4 days	3 years 2 months 12 days
Held to maturity securities with unrealized losses, average duration	2 years 3 months 29 days	2 years 7 months 28 days
Held-To-Maturity Securities, Continuous Unrealized Loss Position, Fair Value	$ 441,000	$ 599,000
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 4 months 13 days	4 years 8 months 27 days
Available for sale securities, average duration	3 years 10 months 10 days	4 years 2 months 19 days
Held to maturity securities, average life	4 years 10 months 17 days	4 years 4 months 21 days
Held to maturity securities, average duration	4 years 3 months	4 years 11 months 12 days
Available for sale securities with unrealized losses, average life	4 years 3 months 26 days	4 years 8 months 16 days
Available for sale securities with unrealized losses, average duration	3 years 9 months 29 days	4 years 2 months 12 days
Amortized cost, available for sale	$ 122,500,000	$ 65,400,000
Residential Collateralized Mortgage Obligations, Issued By Private Enterprises [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities held to maturity (HTM), at amortized cost	482,000	651,000
Estimated Fair Value, held to maturity	441,000	599,000
Gross unrealized losses, held to maturity	41,000	52,000
Bond Mutual Funds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale		4,397,000
Securities available for sale (AFS), at fair value		4,423,000
US Government Obligations [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities held to maturity (HTM), at amortized cost	999,000	1,000,000
Estimated Fair Value, held to maturity	998,000	$ 1,000,000
Gross unrealized losses, held to maturity	$ 1,000
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	$ 215,764,000	$ 162,336,000
Standard Poor's, BB Rating [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amount	483,000	651,000
Standard Poor's, B+ Rating [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amount