Investment Securities (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) security shares	Dec. 31, 2016 USD ($) security shares	Dec. 31, 2015 USD ($) security
Schedule of Investments [Line Items]
Proceeds from sale of available for sale securities	$ 6,510	$ 14,406	$ 9,846
U.S. Treasury bonds [Member]
Schedule of Investments [Line Items]
Number of securities sold | security		9
Proceeds from sale of available for sale securities		$ 14,400
Gross realized gains		$ 1,600
Federal Home Loan Mortgage Corporation [Member]
Schedule of Investments [Line Items]
Equity securities common stock shares owned | shares	22,368	22,368
Municipal bonds [Member]
Schedule of Investments [Line Items]
Number of securities sold | security	18		27
Proceeds from sale of available for sale securities	$ 6,500
Gross realized gains	$ 244
Mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Number of securities sold | security			2
Asset-backed securities - Private label [Member]
Schedule of Investments [Line Items]
Number of securities in unrealized losses less than twelve months category | security	1
Municipal Bonds And Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Proceeds from sale of available for sale securities			$ 9,800
Gross realized gains			$ 440
Securities Pledged as Collateral With Federal Reserve Bank (“FRB”) Of New York [Member] | Municipal bonds [Member]
Schedule of Investments [Line Items]
Investment owned balance, positions | security	33	34
Investment owned, at cost	$ 11,300	$ 11,100
Investment owned, at fair value	$ 11,700	$ 11,500
Securities Pledged As Collateral For Customer Deposits [Member] | Municipal bonds [Member]
Schedule of Investments [Line Items]
Investment owned balance, positions | security	20	14
Investment owned, at cost	$ 5,100	$ 3,600
Investment owned, at fair value	$ 5,300	$ 3,700