Short-term Borrowings (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Short-term Debt	$ 0	$ 0	$ 0
Short-term Debt, Weighted Average Interest Rate	0.00%	0.00%	0.00%
Short-term Debt, Average Outstanding Amount	16	43	225
Short-term Debt, Weighted Average Interest Rate During Year	0.90%	0.92%	0.96%
Short-term Debt, Maximum Month-end Outstanding Amount	0	2,376	1,925
Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term Debt	4,681	3,363	2,689
Short-term Debt, Weighted Average Interest Rate	0.50%	0.50%	0.50%
Short-term Debt, Average Outstanding Amount	3,797	2,774	2,746
Short-term Debt, Weighted Average Interest Rate During Year	0.50%	0.50%	0.50%
Short-term Debt, Maximum Month-end Outstanding Amount	$ 4,681	$ 3,363	$ 3,174