Derivatives and Hedging Activities (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Derivative [Line Items]
Term of written loan commitments, days	60
Default Assumptions Percentage	100.00%
Government Agency Issued Bonds or MBS
Derivative [Line Items]
Collateral posted against derivative liabilities	53,600,000	$ 53,500,000	$ 67,700,000
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative Asset, Notional Amount	250,000,000	$ 250,000,000	$ 5,389,000