Derivative Instruments (Schedule of Information Related to Derivative Instruments) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Notional amount	$ 242,200,000	$ 17,200,000
Interest Rate Swaption [Member]
Derivative [Line Items]
Notional amount	225,000,000
Interest Rate Swaps [Member]
Derivative [Line Items]
Notional amount	$ 17,200,000	$ 17,200,000