Derivative Financial Instruments and Hedging Activities (Details) - Interest Rate Derivatives Portfolio (Fair Value Hedging, USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2014		Dec. 31, 2013
Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional amount outstanding	$ 13,854		$ 14,730
Derivative liability fair value	(1,103)		(1,472)
Weighted-average interest rate received (percent)	2.07%		2.08%
Weighted-average interest rate paid (percent)	6.38%		6.39%
Weighted-average maturity (in years)	3 years 0 months 8 days		3 years 9 months 5 days
Fair value of assets needed to settle derivative transactions	$ 1,130	[1]	$ 1,502

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