Federal Funds Purchased and Securities Sold Under Agreements to Repurchase (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Short-term Debt [Line Items]
Federal Funds Purchased	$ 0	$ 0	$ 0
Securities Sold under Agreements to Repurchase	102,353,000	116,319,000	130,791,000
Available-for-sale Securities Pledged as Collateral	176,400,000	192,800,000
Federal Funds Lines of Credit, Amount of Available Unused Funds	196,000,000	236,000,000
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Short-term Debt, Maximum Month-end Outstanding Amount	90,000,000	85,000,000	0
Short-term Debt, Average Outstanding Amount	4,732,000	9,907,000	9,000
Short-term Debt, Weighted Average Interest Rate	0.00%	0.00%	0.00%
Debt Instrument, Interest Rate During Period	0.30%	0.33%	0.68%
Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term Debt, Maximum Month-end Outstanding Amount	125,971,000	135,753,000	134,257,000
Short-term Debt, Average Outstanding Amount	$ 102,643,000	$ 125,443,000	$ 135,134,000
Short-term Debt, Weighted Average Interest Rate	0.05%	0.80%	1.30%
Debt Instrument, Interest Rate During Period	0.36%	1.25%	1.45%