Short-Term Borrowings (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Average balances and cost of funds of short-term borrowings
Average Balances	$ 22,233	$ 13,179	$ 12,377
Cost of Funds (percent)	0.17%	0.17%	0.17%
Federal funds purchased
Average balances and cost of funds of short-term borrowings
Average Balances	17,899	8,072	4,346
Cost of Funds (percent)	0.17%	0.17%	0.15%
Securities sold under agreements to repurchase
Average balances and cost of funds of short-term borrowings
Average Balances	$ 4,334	$ 5,107	$ 8,031
Cost of Funds (percent)	0.15%	0.17%	0.18%