Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Operating real estate	$ 2,163,444	$ 1,931,698
Construction in progress	73,121	195,736
Held for development	9,463	9,390
Total Real estate, at cost	2,246,028	2,136,824
Accumulated depreciation	(411,166)	(361,424)
Net real estate	1,834,862	1,775,400
Cash and cash equivalents	39,925	59,357
Restricted cash	11,623	10,994
Accounts receivable, net	7,518	6,727
Deferred rent receivables, net	38,422	35,883
Other assets, net	46,069	53,401
TOTAL ASSETS	1,978,419	1,941,762
LIABILITIES AND EQUITY
Secured notes payable	579,743	812,811
Unsecured notes payable	450,000	250,000
Unsecured line of credit	30,000	0
Accounts payable and accrued expenses	31,821	50,861
Security deposits payable	5,956	5,521
Other liabilities and deferred credits	51,972	55,993
Total liabilities	$ 1,149,492	$ 1,175,186
Commitments and contingencies (Note 12)
American Assets Trust, Inc. stockholders' equity
Common stock, $0.01 par value, 490,000,000 shares authorized, 45,407,719 and 43,701,669 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively	$ 454	$ 437
Additional paid-in capital	863,432	795,065
Accumulated dividends in excess of net income	(64,066)	(60,291)
Accumulated other comprehensive income	(258)	92
Total American Assets Trust, Inc. stockholders' equity	799,562	735,303
Noncontrolling interests	29,365	31,273
Total equity	828,927	766,576
TOTAL LIABILITIES AND EQUITY	1,978,419	1,941,762
American Assets Trust, L.P.
ASSETS
Operating real estate	2,163,444	1,931,698
Construction in progress	73,121	195,736
Held for development	9,463	9,390
Total Real estate, at cost	2,246,028	2,136,824
Accumulated depreciation	(411,166)	(361,424)
Net real estate	1,834,862	1,775,400
Cash and cash equivalents	39,925	59,357
Restricted cash	11,623	10,994
Accounts receivable, net	7,518	6,727
Deferred rent receivables, net	38,422	35,883
Other assets, net	46,069	53,401
TOTAL ASSETS	1,978,419	1,941,762
LIABILITIES AND EQUITY
Secured notes payable	579,743	812,811
Unsecured notes payable	450,000	250,000
Unsecured line of credit	30,000	0
Accounts payable and accrued expenses	31,821	50,861
Security deposits payable	5,956	5,521
Other liabilities and deferred credits	51,972	55,993
Total liabilities	1,149,492	1,175,186
American Assets Trust, Inc. stockholders' equity
Accumulated other comprehensive income	(339)	130
TOTAL LIABILITIES AND EQUITY	1,978,419	1,941,762
Partners' Capital [Abstract]
Limited partners' capital, 17,899,516 and 17,905,257 units issued and outstanding as of December 31, 2015 and December 31, 2014, respectively	29,446	31,235
General partner's capital, 45,407,719 and 43,701,669 units issued and outstanding as of December 31, 2015 and December 31, 2014, respectively	799,820	735,211
Total capital	$ 828,927	$ 766,576