Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenue:
Rental income	$ 54,964	$ 48,616	$ 109,284	$ 93,582
Other property income	2,845	2,484	5,563	4,401
Total revenue	57,809	51,100	114,847	97,983
Expenses:
Rental expenses	15,952	14,322	31,195	26,533
Real estate taxes	5,944	5,452	11,388	9,410
General and administrative	3,992	3,866	7,757	7,052
Depreciation and amortization	14,671	13,934	29,924	26,089
Total operating expenses	40,559	37,574	80,264	69,084
Operating income	17,250	13,526	34,583	28,899
Interest expense	(14,476)	(14,063)	(28,832)	(27,054)
Early extinguishment of debt				(25,867)
Loan transfer and consent fees				(9,019)
Gain on acquisition				46,371
Other income (expense), net	(150)	530	(256)	(71)
Income (loss) from continuing operations	2,624	(7)	5,495	13,259
Discontinued operations
Results from discontinued operations		462		792
Net income	2,624	455	5,495	14,051
Net income attributable to restricted shares	(131)	(132)	(263)	(218)
Net loss attributable to Predecessor's noncontrolling interests in consolidated real estate entities				2,458
Net (income) loss attributable to Predecessor's controlled owners' equity				(16,995)
Net income (Loss) attributable to American Assets Trust, Inc. stockholders	(804)	(104)	(1,687)	225
Net income (loss) attributable to American Assets Trust, Inc. stockholders	$ 1,689	$ 219	$ 3,545	$ (479)
Basic net income (loss) from continuing operations attributable to common stockholders per share	$ 0.04		$ 0.09	$ (0.03)
Basic net income from discontinued operations attributable to common stockholders per share		$ 0.01		$ 0.02
Basic net income (loss) attributable to common stockholders per share	$ 0.04	$ 0.01	$ 0.09	$ (0.01)
Weighted average shares of common stock outstanding-basic	38,659,155	38,655,084	38,658,162	34,810,932
Diluted net income (loss) from continuing operations attributable to common stockholders per share	$ 0.04		$ 0.09	$ (0.03)
Diluted net income from discontinued operations attributable to common stockholders per share		$ 0.01		$ 0.02
Diluted net income (loss) attributable to common stockholders per share	$ 0.04	$ 0.01	$ 0.09	$ (0.01)
Weighted average shares of common stock outstanding - diluted	57,055,244	57,051,173	57,054,509	34,810,932
Dividends declared per common share	$ 0.21	$ 0.21	$ 0.42	$ 0.38