Derivatives and Hedging Activities (Fair Value of Derivatives) (Details) (Derivatives not designated as a hedging instruments, USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 3,216	$ 2,046
Liability Derivatives	3,285	2,052
Other Assets | Interest rate products
Derivatives, Fair Value [Line Items]
Asset Derivatives	3,208	2,040
Other Assets | Credit contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives	8	6
Other Liabilities | Interest rate products
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 3,285	$ 2,052