Other Real Estate Owned ("OREO") (Narrative) (Details) - USD ($)	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Schedule of Trading Securities and Other Trading Assets [Line Items]
Additions of underlying property				$ 2,772,000	$ 2,718,000	$ 3,120,000
Gains (losses) on sale of OREO					(443,000)
Other real estate owned, carrying amount	$ 9,154,000		$ 8,460,000	9,154,000	8,460,000	7,763,000	$ 9,449,000
Valuation allowance	117,000		7,000	313,000	262,000	574,000
Residential Real Estate [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Impaired loans in foreclosure proceedings in process	$ 742,000			742,000		$ 353,000
One Residential Property [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Additions of underlying property					577,000
Other real estate owned, carrying amount			166,000		166,000
Three Residential Lots [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other real estate owned, carrying amount			106,000		106,000
Three Commercial Properties [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other real estate owned, carrying amount			875,000		875,000
Apartment And Condominium Property [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other real estate owned, carrying amount			$ 2,200,000		2,200,000
One Residential Property And Three Residential Lots [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Bank provided financing		$ 200,000
Improved Commercial Office Building [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Additions of underlying property					$ 2,100,000
Four Residential Properties And Multiple Residential Lots [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Gains (losses) on sale of OREO				36,000
Proceeds from sale of properties				$ 1,100,000