Transactions with related parties (Analysis of Activity with Respect to Loans to Officers and Directors of the Bank) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Increase (Decrease) In Loans To Officers And Directors [Roll Forward]
Balance at beginning of year	$ 2,253	$ 2,791
Additions	485	106
Repayments	(1,321)	(644)
Balance at end of year	$ 1,417	$ 2,253