Derivative Financial Instruments and Hedging Activities (Details) - Other Derivative Instruments (Other Derivative Instruments, USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Other Derivative Instruments
Derivative [Line Items]
Gross notional amount outstanding	$ 432,977		$ 256,638
Derivative asset fair value	4,916		2,235
Derivative liability fair value	(4,916)		(2,235)
Fair value of assets needed to settle derivative transactions	$ 4,899	[1]	$ 1,305	[1]

[1] This amount represents the fair value if credit risk related contingent features were triggered.