Fair Values of Financial Instruments (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010	Dec. 31, 2009
Assets
Cash and cash equivalents	$ 57,482	$ 21,812	$ 33,790	$ 107,397
Cash and cash equivalents, Fair Value	57,482	21,812
Secured loans receivable, net	302,264	149,263
Secured loans receivable, net, Fair Value	302,393	155,377
Derivative instruments, Carrying Value	8,536	99
Derivative instruments, Fair Value	8,536	99
Marketable debt securities, Carrying Value	42,788	66,675
Marketable debt securities, Fair Value	42,788	66,675
Unsecured loans receivable ,net, Carrying value	65,384	0
Unsecured loans receivable, net, Fair value	65,384	0
Liabilities:
Senior notes payable and other debt, gross, Carrying Value	6,065,856	2,926,954
Senior notes payable and other debt, gross, Fair Value	6,415,640	3,055,435
Derivative instruments, Fair value	24,537	3,722
Derivative instruments, Carrying value	24,537	3,722
Contingent consideration liability, Carrying value	56,218	0
Contingent consideration liability, Fair Value	56,218	0
Redeemable OP unitholder interests, Carrying value	92,817	0
Redeemable OP unitholder interests, Fair value	$ 92,817	$ 0

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Balance Type:	na
Period Type:	duration

For an unclassified balance sheet, total of debt securities categorized neither as held-to-maturity nor trading.

+ References

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

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