Derivatives (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	May 31, 2014 Forward Contracts instrument	Dec. 31, 2013 Forward Contracts instrument	Apr. 30, 2013 Forward Contracts instrument
Derivative [Line Items]
Number of interest rate derivatives held			3	4	4
Derivative, Notional Amount			$ 225,000,000	$ 240,000,000	$ 240,000,000
Interest rate cash flow hedge liability, fair value					3,156,000
Amount of cash flow hedge reported in AOCI			6,312,000		3,141,000
Fair value of interest rate hedges recognized in other comprehensive income	13,972,000
Interest expense	736,000	306,000
Interest rate hedges gain (loss) to be reclassified into interest expense over next 12 months	$ 1,649,000