Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Operating real estate	$ 2,241,061	$ 2,163,444
Construction in progress	50,498	73,121
Held for development	9,447	9,463
Total Real estate, at cost	2,301,006	2,246,028
Accumulated depreciation	(469,460)	(411,166)
Net real estate	1,831,546	1,834,862
Cash and cash equivalents	44,801	39,925
Restricted cash	9,950	11,623
Accounts receivable, net	9,330	7,518
Deferred rent receivables, net	38,452	38,422
Other assets, net	52,854	41,939
TOTAL ASSETS	1,986,933	1,974,289
LIABILITIES AND EQUITY
Secured notes payable	445,180	579,000
Unsecured notes payable	596,350	446,613
Unsecured line of credit	20,000	30,000
Accounts payable and accrued expenses	32,401	31,821
Security deposits payable	6,114	5,956
Other liabilities and deferred credits	48,337	51,972
Total liabilities	1,148,382	1,145,362
Commitments and contingencies (Note 12)
American Assets Trust, Inc. stockholders' equity
Common stock, $0.01 par value, 490,000,000 shares authorized, 45,732,109 and 45,407,719 shares issued and outstanding at December 31, 2016 and December 31, 2015, respectively	457	454
Additional paid-in capital	874,597	863,432
Accumulated dividends in excess of net income	(77,296)	(64,066)
Accumulated other comprehensive income (loss)	11,798	(258)
Total American Assets Trust, Inc. stockholders' equity	809,556	799,562
Noncontrolling interests	28,995	29,365
Total equity	838,551	828,927
TOTAL LIABILITIES AND EQUITY	1,986,933	1,974,289
American Assets Trust, L.P.
ASSETS
Operating real estate	2,241,061	2,163,444
Construction in progress	50,498	73,121
Held for development	9,447	9,463
Total Real estate, at cost	2,301,006	2,246,028
Accumulated depreciation	(469,460)	(411,166)
Net real estate	1,831,546	1,834,862
Cash and cash equivalents	44,801	39,925
Restricted cash	9,950	11,623
Accounts receivable, net	9,330	7,518
Deferred rent receivables, net	38,452	38,422
Other assets, net	52,854	41,939
TOTAL ASSETS	1,986,933	1,974,289
LIABILITIES AND EQUITY
Secured notes payable	445,180	579,000
Unsecured notes payable	596,350	446,613
Unsecured line of credit	20,000	30,000
Accounts payable and accrued expenses	32,401	31,821
Security deposits payable	6,114	5,956
Other liabilities and deferred credits	48,337	51,972
Total liabilities	1,148,382	1,145,362
American Assets Trust, Inc. stockholders' equity
Accumulated other comprehensive income (loss)	16,478	(339)
TOTAL LIABILITIES AND EQUITY	1,986,933	1,974,289
Partners' Capital [Abstract]
Limited partners' capital, 17,888,822 and 17,899,516 units issued and outstanding as of December 31, 2016 and December 31, 2015, respectively	24,315	29,446
General partner's capital, 45,732,109 and 45,407,719 units issued and outstanding as of December 31, 2016 and December 31, 2015, respectively	797,758	799,820
Total capital	$ 838,551	$ 828,927