Derivatives and Hedging Activities (Textual) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative
Credit risk related contingent features termination value	$ 7,000,000
Percentage of collateral required to be posted (percent)	100.00%
Cross acceleration
Derivative
Credit risk related contingent features termination value	4,900,000
Other Credit Enhancements
Derivative
Credit risk related contingent features termination value	14,900,000
Termination
Derivative
Fair value of credit risk derivatives	20,000,000
Net liability position
Derivative
Credit risk related contingent features termination value	22,000,000
Interest Expense
Derivative
Change in fair value of derivatives, ineffective portion	37,000	(39,000)	(195,000)
Interest Expense | Cash Flow Hedges of Interest Rate Risk | Interest Rate Cap
Derivative
Change in fair value of interest rate derivatives included in AOCI and expected to be reclassified in the next 12 months	$ 11,100,000