Commitments And Contingencies Commitments and Contingencies (Schedule of Lease Commitments) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Maximum Commitment For All Active Development Projects	$ 28,579
Construction and Development Costs	(15,581)
Remaining Unfunded Development Commitment	12,998
Capital Improvement Commitment [Member] | EL FW Intermediary I, LLC [Member]
Maximum Commitment For All Active Development Projects	8,937
Construction and Development Costs	(8,937)
Remaining Unfunded Development Commitment	0
Capital Improvement Commitment [Member] | Bickford Senior Living [Member]
Maximum Commitment For All Active Development Projects	4,150
Construction and Development Costs	(1,647)
Remaining Unfunded Development Commitment	2,503
Capital Improvement Commitment [Member] | Senior Living Communities [Member]
Maximum Commitment For All Active Development Projects	6,830
Construction and Development Costs	(2,185)
Remaining Unfunded Development Commitment	4,645
Capital Improvement Commitment [Member] | Discovery Senior Living [Member]
Maximum Commitment For All Active Development Projects	500
Construction and Development Costs	0
Remaining Unfunded Development Commitment	500
Capital Improvement Commitment [Member] | Village Concepts [Member]
Maximum Commitment For All Active Development Projects	7,450
Construction and Development Costs	(2,750)
Remaining Unfunded Development Commitment	4,700
Development Commitment [Member] | Chancellor Healthcare [Member]
Maximum Commitment For All Active Development Projects	62
Construction and Development Costs	(62)
Remaining Unfunded Development Commitment	0
Development Commitment [Member] | Navion Senior Solutions [Member]
Maximum Commitment For All Active Development Projects	650
Construction and Development Costs	0
Remaining Unfunded Development Commitment	$ 650