Equity Investment in Real Estate and the Managed REITs (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Combined Equity Investments
Equity Method Investment Summarized Financial Information
Real estate, net	$ 1,038,422	$ 1,106,640
Other assets	146,635	179,654
Total assets	1,185,057	1,286,294
Debt	(695,429)	(740,595)
Accounts payable, accrued expenses, and other liabilities	(77,819)	(58,827)
Total liabilities	(773,248)	(799,422)
Redeemable noncontrolling interest	0	(21,747)
Noncontrolling interests	176	0
Stockholders’ equity	411,985	465,125
Managed REITs
Equity Method Investment Summarized Financial Information
Real estate, net	7,218,177	6,049,926
Other assets	2,128,862	2,002,620
Total assets	9,347,039	8,052,546
Debt	(4,237,044)	(3,509,394)
Accounts payable, accrued expenses, and other liabilities	(571,097)	(450,362)
Total liabilities	(4,808,141)	(3,959,756)
Redeemable noncontrolling interest	0	(21,747)
Noncontrolling interests	(192,492)	(170,140)
Stockholders’ equity	$ 4,346,406	$ 3,900,903