Derivatives and Hedging Activities (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivatives, Fair Value [Line Items]
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net	$ (200,000)
Amount of gain (loss) recognized in income on derivative (ineffective portion, reclassifications of missed forecasted transactions and amounts excluded from effectiveness testing)	(8,048,000)	(5,000)
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Assets needed for immediate settlement, aggregate fair value	10,300,000
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Interest Expense [Member]
Derivatives, Fair Value [Line Items]
Derivative instruments, gain (loss) reclassification from accumulated OCI to income, estimated net amount to be transferred	10,300,000
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Amount of gain (loss) recognized in income on derivative (ineffective portion, reclassifications of missed forecasted transactions and amounts excluded from effectiveness testing)	$ 8,000,000