Derivative Financial Instruments (Narrative) (Details) $ in Thousands	Sep. 30, 2015 USD ($) derivative_instrument	Dec. 31, 2014 USD ($) derivative_instrument
Interest Rate Swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional Amount		$ 22,681
Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional Amount		165,795
Mirror swaps with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional Amount		165,795
Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional Amount		$ 0
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Interest Rate Swaps [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of Instruments Held | derivative_instrument	1	2
Notional Amount	$ 14,400	$ 22,681
Pledged collateral to derivative counterparties	550	939
Not Designated as Hedging Instrument [Member] | Interest rate swaps with customers [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional Amount	272,600	165,800
Not Designated as Hedging Instrument [Member] | Mirror swaps with counterparties [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional Amount	272,565	$ 165,795
Not Designated as Hedging Instrument [Member] | Risk participation-out agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional Amount	25,300
Not Designated as Hedging Instrument [Member] | Risk participation-in agreement [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional Amount	$ 8,000