Derivative Financial Instruments - CF Hedges Gain, Loss (Details) - Cash Flow Hedges - Derivatives designated as hedging instruments - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Gains and losses from derivatives
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivatives	$ 660,000	$ 175,000	$ 1,199,000	$ 1,349,000
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness			0	0
Interest Rate Swaps
Gains and losses from derivatives
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivatives	$ 660,000	186,000	$ 1,199,000	1,365,000
Interest Rate Cap
Gains and losses from derivatives
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivatives		$ (11,000)		$ (16,000)