Derivative Financial Instruments (Narrative) (Details) (USD $)	Mar. 31, 2014 derivative_instrument	Dec. 31, 2013 derivative_instrument
Interest rate swap contracts [Member] | Derivatives Designated as Cash Flow Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Number of Instruments Held	2	2
Derivative asset notional amount	$ 22,700,000	$ 22,700,000
Pledged collateral to derivative counterparties	1,600,000	1,600,000
Interest rate swaps with customers [Member] | Derivatives not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative asset notional amount	112,000,000	105,600,000
Mirror swaps with counterparties [Member] | Derivatives not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative asset notional amount	$ 111,986,000	$ 105,582,000