Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Real estate investments, net	$ 1,992,607	$ 1,806,471
Real estate notes receivable, net	20,000	57,459
Cash and cash equivalents	15,956	69,491
Accounts and other receivables, net	13,317	12,658
Restricted cash and escrow deposits	17,623	16,718
Identified intangible assets, net	282,934	272,390
Other assets, net	71,653	56,442
Total assets	2,414,090	2,291,629
Liabilities:
Debt, net	1,037,359	639,149
Accounts payable and accrued liabilities	63,443	47,801
Derivative financial instruments - interest rate swaps	9,370	1,792
Security deposits, prepaid rent and other liabilities	24,450	19,930
Identified intangible liabilities, net	11,309	11,832
Total liabilities	1,145,931	720,504
Commitments and contingencies
Redeemable noncontrolling interest of limited partners	3,564	3,785
Equity:
Preferred stock, $0.01 par value; 200,000,000 shares authorized; none issued and outstanding	0	0
Additional paid-in capital	1,885,836	2,032,305
Cumulative dividends in excess of earnings	(633,717)	(467,249)
Total stockholders’ equity	1,254,266	1,567,340
Noncontrolling interest	10,329	0
Total equity	1,264,595	1,567,340
Total liabilities and equity	2,414,090	2,291,629
Common stock
Equity:
Common stock, $0.01 par value	0	2,284
Class A
Equity:
Common stock, $0.01 par value	1,001	0
Class B
Equity:
Common stock, $0.01 par value	$ 1,146	$ 0