Securities - Realized Gains and Losses (Narrative) (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) security	Sep. 30, 2015 USD ($) security	Dec. 31, 2015 USD ($)
Schedule of Investments [Line Items]
Available-for-sale Securities, Realized gains	$ 12,000	$ 0	$ 187,000	$ 28,000
Available-for-sale Securities, impairment on securities					$ 0
Available-for-sale Securities, gross realized gain (loss)	11,000	0	186,000	28,000
Available-for-sale Securities pledged as collateral	17,500,000		17,500,000		$ 18,500,000
Municipal Securities
Schedule of Investments [Line Items]
Available-for-sale Securities, gross realized gain (loss)			$ 112,000
Number of securities sold | security			15
Available-for-sale Securities, book value	6,400,000		$ 6,400,000
SBA Securities | 3 Securities Sold
Schedule of Investments [Line Items]
Available-for-sale Securities, gross realized gain (loss)			$ 12,000
Number of securities sold | security			2
Available-for-sale Securities, book value	2,500,000		$ 2,500,000
SBA Securities | 1 Security Sold
Schedule of Investments [Line Items]
Available-for-sale Securities, gross realized gain (loss)			$ (1,000)
Number of securities sold | security			1
Available-for-sale Securities, book value	753,000		$ 753,000
Equity Securities | 3 Securities Sold
Schedule of Investments [Line Items]
Available-for-sale Securities, gross realized gain (loss)			$ 63,000
Number of securities sold | security			1
Available-for-sale Securities, book value	$ 40,000		$ 40,000
Corporate Bond
Schedule of Investments [Line Items]
Available-for-sale Securities, gross realized gain (loss)				$ 28,000
Number of securities sold | security				1
Available-for-sale Securities, book value		$ 500,000		$ 500,000