Borrowed Funds (Summary of Short Term Borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Short-term Debt [Line Items]
Outstanding at end of year	$ 35,828	$ 39,801
Weighted average interest rate at end of period	0.16%	0.15%
Maximum amount outstanding as of any month end	$ 47,131	$ 53,819
Average amount outstanding	$ 35,908	$ 45,702
Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Approximate weighted average rate during the period	0.16%	0.13%