Real Estate Loans Receivable (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Advances on real estate loans receivable:
Investments in new loans		$ 8,445	$ 530,497	$ 122,632
Draws on existing loans		121,439	68,225	79,575
Net cash advances on real estate loans		129,884	598,722	202,207
Receipts On Real Estate Loans Receivable 1 [Abstract]
Loan payoffs		302,742	121,778	119,262
Principal Payments On Loans		6,867	33,340	32,070
Sub-total		309,609	155,118	151,332
Less : Non-cash activity	[1]	(60,057)	(23,288)	(45,836)
Net cash receipts on real estate loans		249,552	131,830	105,496
Net cash advances (receipts) on real estate loans		(119,668)	466,892	96,711
Change in balance due to foreign currency translation		(14,086)	(4,281)	(2,852)
Loan Impairment	[2]	(3,053)	0	0
Net Change Real Estate Loans Receivable		(196,864)	439,323	48,023
Summary of real estate loans receivable
Real estate loans receivable		622,628	819,492
Mortgage Receivable [Member]
Summary of real estate loans receivable
Real estate loans receivable		485,735	635,492
Other Real Estate Loans Receivables [Member]
Summary of real estate loans receivable
Real estate loans receivable		136,893	184,000
Outpatient Medical [Member]
Advances on real estate loans receivable:
Investments in new loans		0	0	60,902
Draws on existing loans		2,651	2,611	20,155
Net cash advances on real estate loans		2,651	2,611	81,057
Receipts On Real Estate Loans Receivable 1 [Abstract]
Loan payoffs		27,303	0	48,258
Principal Payments On Loans		0	0	72
Sub-total		27,303	0	48,330
Less : Non-cash activity	[1]	(15,013)	0	(45,836)
Net cash receipts on real estate loans		12,290	0	2,494
Net cash advances (receipts) on real estate loans		(9,639)	2,611	78,563
Change in balance due to foreign currency translation		0	0	0
Loan Impairment	[2]	(3,053)	0	0
Net Change Real Estate Loans Receivable		(27,705)	2,611	32,727
Triple Net [Member]
Advances on real estate loans receivable:
Investments in new loans		8,445	530,497	61,730
Draws on existing loans		118,788	65,614	59,420
Net cash advances on real estate loans		127,233	596,111	121,150
Receipts On Real Estate Loans Receivable 1 [Abstract]
Loan payoffs		275,439	121,778	71,004
Principal Payments On Loans		6,867	33,340	31,998
Sub-total		282,306	155,118	103,002
Less : Non-cash activity	[1]	(45,044)	(23,288)	0
Net cash receipts on real estate loans		237,262	131,830	103,002
Net cash advances (receipts) on real estate loans		(110,029)	464,281	18,148
Change in balance due to foreign currency translation		(14,086)	(4,281)	(2,852)
Loan Impairment	[2]	0	0	0
Net Change Real Estate Loans Receivable		$ (169,159)	$ 436,712	$ 15,296

[1] Represents an acquisition of assets previously financed as a real estate loan. Please see Note 3 for additional information.

[2] Represents a direct write down of an impaired loan receivable