Subsequent Events Subsequent Events (Narrative) (Details) - USD ($)	1 Months Ended	9 Months Ended
	Nov. 07, 2017	Sep. 30, 2017	Sep. 30, 2016	Nov. 03, 2017
Subsequent Event [Line Items]
Remaining Unfunded Development Commitment		$ 57,299,000
Payments to Acquire Real Estate		$ 133,251,000	$ 288,965,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Remaining Unfunded Development Commitment				$ 7,100,000
Capital Improvements Commitment Funded	$ 0