Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
ASSETS
Operating real estate	$ 1,898,070	$ 1,891,549
Construction in progress	34,498	32,183
Held for development	15,007	14,944
Total Real estate, at cost	1,947,575	1,938,676
Accumulated depreciation	(283,020)	(270,494)
Net real estate	1,664,555	1,668,182
Cash and cash equivalents	43,972	42,479
Restricted cash	8,803	7,421
Accounts receivable, net	7,479	6,440
Deferred rent receivables, net	30,230	29,395
Other assets, net	69,431	73,670
TOTAL ASSETS	1,824,470	1,827,587
LIABILITIES AND EQUITY
Secured notes payable	1,044,467	1,044,682
Accounts payable and accrued expenses	35,599	29,509
Security deposits payable	5,067	4,856
Other liabilities and deferred credits	60,181	62,811
Total liabilities	1,145,314	1,141,858
Commitments and contingencies (Note 10)
American Assets Trust, Inc. stockholders' equity
Common stock $0.01 par value, 490,000,000 shares authorized, 39,664,212 and 39,664,212 shares outstanding at March 31, 2013 and December 31, 2012, respectively	397	397
Additional paid-in capital	664,265	663,589
Accumulated dividends in excess of net income	(30,584)	(25,625)
Total American Assets Trust, Inc. stockholders' equity	634,078	638,361
Noncontrolling interests	45,078	47,368
Total equity	679,156	685,729
TOTAL LIABILITIES AND EQUITY	$ 1,824,470	$ 1,827,587