Real Estate Loans Receivable (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016
Advances on real estate loans receivable:
Investments in new loans		$ 11,315	$ 8,223
Draws on existing loans		58,736	97,273
Net cash advances on real estate loans		70,051	105,496
Receipts on real estate loans receivable:
Loan payoffs		202,892	278,596
Principal payments on loans		1,121	6,553
Sub-total		204,013	285,149
Less : Non-cash activity	[1],[2]	(121,750)	(60,057)
Total receipts on real estate loans		82,263	225,092
Net advances (receipts) on real estate loans		(12,212)	(119,596)
Change in balance due to foreign currency translation		8,183	(9,819)
Net change Real Estate Loans Receivable		(125,779)	(189,472)
Triple Net [Member]
Advances on real estate loans receivable:
Investments in new loans		11,315	8,223
Draws on existing loans		58,736	94,622
Net cash advances on real estate loans		70,051	102,845
Receipts on real estate loans receivable:
Loan payoffs		142,392	251,293
Principal payments on loans		1,121	6,553
Sub-total		143,513	257,846
Less : Non-cash activity	[1],[2]	(61,250)	(45,044)
Total receipts on real estate loans		82,263	212,802
Net advances (receipts) on real estate loans		(12,212)	(109,957)
Change in balance due to foreign currency translation		8,183	(9,819)
Net change Real Estate Loans Receivable		(65,279)	(164,820)
Outpatient Medical [Member]
Advances on real estate loans receivable:
Investments in new loans		0	0
Draws on existing loans		0	2,651
Net cash advances on real estate loans		0	2,651
Receipts on real estate loans receivable:
Loan payoffs		60,500	27,303
Principal payments on loans		0	0
Sub-total		60,500	27,303
Less : Non-cash activity	[1],[2]	(60,500)	(15,013)
Total receipts on real estate loans		0	12,290
Net advances (receipts) on real estate loans		0	(9,639)
Change in balance due to foreign currency translation		0	0
Net change Real Estate Loans Receivable		$ (60,500)	$ (24,652)

[1] Current year outpatient medical represents a deed in lieu of foreclosure on a previously financed first mortgage property.

[2] Triple-net and prior year outpatient medical represents acquisitions of assets previously financed as real estate loans.