American Assets Trust (AAT) 10-K 19 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 19, 2016	Jun. 30, 2015
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Trading Symbol	AAT
Entity Registrant Name	AMERICAN ASSETS TRUST, INC.
Entity Central Index Key	1,500,217
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		45,407,402
Entity Public Float			$ 1,485,600,000
American Assets Trust, L.P.
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Entity Registrant Name	AMERICAN ASSETS TRUST, L.P.
Entity Central Index Key	1,509,570
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		0
Entity Public Float			$ 0

Consolidated Balance Sheets

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

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	490,000,000	490,000,000
Common stock, shares outstanding	45,407,719	43,701,669
American Assets Trust, L.P.
Limited Partners' Capital Account, Units Issued	17,899,516	17,905,257
Limited Partners' Capital Account, Units Outstanding	17,899,516	17,905,257
General Partners' Capital Account, Units Issued	45,407,719	43,701,669
General Partners' Capital Account, Units Outstanding	45,407,719	43,701,669
Common Stock
Common stock, shares issued	45,407,719	43,701,669

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
REVENUE:
Rental income		$ 261,887	$ 246,078	$ 242,757
Other property income		13,736	13,922	12,300
Total revenue		275,623	260,000	255,057
EXPENSES:
Rental expenses		73,187	68,267	68,608
Real estate taxes		24,819	22,964	21,378
General and administrative		20,074	18,532	17,195
Depreciation and amortization		63,392	66,568	66,775
Total operating expenses		181,472	176,331	173,956
Operating income (loss)		94,151	83,669	81,101
Interest expense		(47,260)	(52,965)	(58,020)
Gain on sale of real estate		7,121	0	0
Other income (expense), net		(97)	441	(487)
Net income		53,915	31,145	22,594
Net income attributable to restricted shares		(168)	(374)	(536)
Net income attributable to unitholders in the Operating Partnership		(15,238)	(9,015)	(6,838)
NET INCOME ATTRIBUTABLE TO AMERICAN ASSETS TRUST, INC. STOCKHOLDERS		$ 38,509	$ 21,756	$ 15,220
EARNINGS PER COMMON SHARE, BASIC
Basic net income attributable to common stockholders per share (in dollars per share)		$ 0.87	$ 0.52	$ 0.38
Weighted average shares of common stock outstanding-basic (in shares)		44,439,112	42,041,126	39,539,457
EARNINGS PER COMMON SHARE, DILUTED
Diluted net income attributable to common stockholders per share (in dollars per share)		$ 0.86	$ 0.51	$ 0.38
Weighted average shares of common stock outstanding-diluted (in shares)		62,339,163	59,947,474	57,515,810
COMPREHENSIVE INCOME
Net income		$ 53,915	$ 31,145	$ 22,594
Reclassification of amortization of forward starting swap included in interest expense		231	39	0
Comprehensive income		53,446	31,275	22,594
Comprehensive income attributable to non-controlling interest		(15,119)	(9,053)	(6,838)
Comprehensive income attributable to American Assets Trust, Inc.		38,327	22,222	15,756
American Assets Trust, L.P.
REVENUE:
Rental income		261,887	246,078	242,757
Other property income		13,736	13,922	12,300
Total revenue		275,623	260,000	255,057
EXPENSES:
Rental expenses		73,187	68,267	68,608
Real estate taxes		24,819	22,964	21,378
General and administrative		20,074	18,532	17,195
Depreciation and amortization		63,392	66,568	66,775
Total operating expenses		181,472	176,331	173,956
Operating income (loss)		94,151	83,669	81,101
Interest expense		(47,260)	(52,965)	(58,020)
Gain on sale of real estate		7,121	0	0
Other income (expense), net		(97)	441	(487)
Net income		53,915	31,145	22,594
Net income attributable to restricted shares		(168)	(374)	(536)
NET INCOME ATTRIBUTABLE TO AMERICAN ASSETS TRUST, INC. STOCKHOLDERS		$ 53,747	$ 30,771	$ 22,058
EARNINGS PER COMMON SHARE, BASIC
Basic net income attributable to common stockholders per share (in dollars per share)		$ 0.86	$ 0.51	$ 0.38
Weighted average shares of common stock outstanding-basic (in shares)		62,339,163	59,947,474	57,515,810
EARNINGS PER COMMON SHARE, DILUTED
Diluted net income attributable to common stockholders per share (in dollars per share)		$ 0.86	$ 0.51	$ 0.38
Weighted average shares of common stock outstanding-diluted (in shares)		62,339,163	59,947,474	57,515,810
DISTRIBUTIONS PER UNIT (in dollars per share)		$ 0.9475	$ 0.8925	$ 0.85
COMPREHENSIVE INCOME
Net income		$ 53,915	$ 31,145	$ 22,594
Other comprehensive loss - unrealized loss on swap derivative during the period		(238)	(1,448)	0
Reclassification of amortization of forward starting swap included in interest expense		231	39	0
Comprehensive income		53,446	31,275	22,594
American Assets Trust, L.P. | Limited Partner
EXPENSES:
Net income	[1]	15,238	9,015	6,838
COMPREHENSIVE INCOME
Net income	[1]	15,238	9,015	6,838
Comprehensive income attributable to American Assets Trust, Inc.		(15,119)	(9,053)	(6,838)
American Assets Trust, L.P. | General Partner
EXPENSES:
Net income	[2]	38,677	22,130	15,756
COMPREHENSIVE INCOME
Net income	[2]	38,677	22,130	15,756
Comprehensive income attributable to American Assets Trust, Inc.		38,327	22,222	15,756
Swap
COMPREHENSIVE INCOME
Other comprehensive loss - unrealized loss on swap derivative during the period		(238)	(1,448)	0
Swap | American Assets Trust, L.P.
COMPREHENSIVE INCOME
Other comprehensive loss - unrealized loss on swap derivative during the period		(238)	(1,448)
Forward Contracts
COMPREHENSIVE INCOME
Other comprehensive loss - unrealized loss on swap derivative during the period		0	1,617	0
Forward Contracts | American Assets Trust, L.P.
COMPREHENSIVE INCOME
Other comprehensive loss - unrealized loss on swap derivative during the period		$ 0	$ 1,617	$ 0
[1]	Consists of limited partnership interests held by third parties.
[2]	Consists of general and limited partnership interests held by American Assets Trust, Inc.

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands		Total	American Assets Trust, L.P.	Limited PartnerAmerican Assets Trust, L.P.	[1]	General PartnerAmerican Assets Trust, L.P.		Accumulated Other Comprehensive Income (Loss)American Assets Trust, L.P.	Swap	SwapAmerican Assets Trust, L.P.	SwapAccumulated Other Comprehensive Income (Loss)American Assets Trust, L.P.	Forward Contracts	Forward ContractsAmerican Assets Trust, L.P.	Forward ContractsAccumulated Other Comprehensive Income (Loss)American Assets Trust, L.P.	Common Stock	Common StockAmerican Assets Trust, L.P.	Additional Paid-in Capital	Accumulated dividends in excess of net income	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss)Swap	Accumulated Other Comprehensive Income (Loss)Forward Contracts	Noncontrolling Interests - Unitholders in the Operating Partnership	Noncontrolling Interests - Unitholders in the Operating PartnershipSwap	Noncontrolling Interests - Unitholders in the Operating PartnershipForward Contracts
Beginning balance (in shares) at Dec. 31, 2012															39,664,212
Beginning balance at Dec. 31, 2012		$ 685,729													$ 397		$ 663,589	$ (25,625)	$ 0			$ 47,368
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		22,594	$ 22,594	$ 6,838		$ 15,756	[2]											15,756				6,838
Common shares issued (in shares)															741,452
Common shares issued		24,910													$ 7		24,903
Conversion of operating partnership units (in shares)															106,326	106,326
Conversion of operating partnership units		0													$ 1		859					(860)
Issuance of restricted stock (in shares)															5,004
Issuance of restricted stock		0													$ 0
Forfeiture of restricted stock (in shares)															(4,431)
Forfeiture of restricted stock		0													$ 0
Dividends declared and paid		(49,500)																(34,221)				(15,279)
Stock-based compensation		2,845															2,845
Other comprehensive income (loss) unrealized gain (loss) on derivatives			0						$ 0			$ 0	$ 0
Reclassification of amortization of forward starting swap included in interest expense		0	0
Ending balance (in shares) at Dec. 31, 2013															40,512,563
Ending balance at Dec. 31, 2013		686,578													$ 405		692,196	(44,090)	0			38,067
Beginning balance (in shares) at Dec. 31, 2012				18,023,435		39,664,212	[2]
Beginning balance at Dec. 31, 2012			685,729	$ 47,368		$ 638,361	[2]	$ 0
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		22,594	22,594	$ 6,838		$ 15,756	[2]											15,756				6,838
Contributions from American Assets Trust, Inc. (in shares)	[2]					741,452
Contributions from American Assets Trust, Inc.			24,910			$ 24,910	[2]
Conversion of operating partnership units (in shares)				(106,326)		106,326	[2]
Conversion of operating partnership units				$ (860)		$ 860	[2]
Issuance of restricted units (in shares)	[2]					5,004
Forfeiture of restricted units (in shares)	[2]					(4,431)
Distributions			(49,500)	$ (15,279)		$ (34,221)	[2]
Stock-based compensation			2,845			$ 2,845	[2]
Other comprehensive income (loss) unrealized gain (loss) on derivatives			0						0			0	0
Ending balance (in shares) at Dec. 31, 2013				17,917,109		40,512,563	[2]
Ending balance at Dec. 31, 2013			686,578	$ 38,067		$ 648,511	[2]	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		31,145	31,145	9,015		$ 22,130	[2]											22,130				9,015
Common shares issued (in shares)															3,110,067
Common shares issued		104,148													$ 31		104,117
Conversion of operating partnership units (in shares)															11,852	11,852
Conversion of operating partnership units		0															(133)					133
Issuance of restricted stock (in shares)															216,748
Issuance of restricted stock		0													$ 2		(2)
Forfeiture of restricted stock (in shares)															(1,192)
Forfeiture of restricted stock		0													$ 0
Dividends declared and paid		(54,311)																(38,331)				(15,980)
Stock-based compensation		3,666															3,666
Shares withheld for employee taxes (in shares)						(148,369)	[2]								(148,369)
Shares withheld for employee taxes		(4,780)	(4,780)			$ (4,780)	[2]								$ (1)		(4,779)
Other comprehensive income (loss) unrealized gain (loss) on derivatives			(1,448)						(1,448)	$ (1,448)	$ (1,448)	1,617	1,617	$ 1,617						$ (1,024)	$ 1,144		$ (424)	$ 473
Reclassification of amortization of forward starting swap included in interest expense		(39)	(39)																(28)			(11)
Ending balance (in shares) at Dec. 31, 2014															43,701,669
Ending balance at Dec. 31, 2014		766,576													$ 437		795,065	(60,291)	92			31,273
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		31,145	31,145	$ 9,015		$ 22,130	[2]											22,130				9,015
Contributions from American Assets Trust, Inc. (in shares)	[2]					3,110,067
Contributions from American Assets Trust, Inc.			104,148			$ 104,148	[2]
Conversion of operating partnership units (in shares)				(11,852)		11,852	[2]
Conversion of operating partnership units				$ 133		$ (133)	[2]
Issuance of restricted units (in shares)	[2]					216,748
Forfeiture of restricted units (in shares)	[2]					(1,192)
Distributions			(54,311)	$ (15,980)		$ (38,331)	[2]
Stock-based compensation			3,666			$ 3,666	[2]
Shares withheld for employee taxes (in shares)						(148,369)	[2]								(148,369)
Shares withheld for employee taxes		(4,780)	(4,780)			$ (4,780)	[2]								$ (1)		(4,779)
Other comprehensive income (loss) unrealized gain (loss) on derivatives			(1,448)						(1,448)	(1,448)	(1,448)	1,617	1,617	$ 1,617						$ (1,024)	$ 1,144		$ (424)	$ 473
Reclassification of amortization of forward starting swap included in interest expense			(39)					(39)
Ending balance (in shares) at Dec. 31, 2014				17,905,257		43,701,669	[2]
Ending balance at Dec. 31, 2014			766,576	$ 31,235		$ 735,211	[2]	130
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		53,915	53,915	15,238		$ 38,677	[2]											38,677				15,238
Common shares issued (in shares)															1,812,451
Common shares issued		72,836													$ 18		72,818
Conversion of operating partnership units (in shares)															5,741	5,741
Conversion of operating partnership units		0															67					(67)
Issuance of restricted stock (in shares)															98,354
Issuance of restricted stock		0													$ 1		(1)
Forfeiture of restricted stock (in shares)															(40,687)
Forfeiture of restricted stock		0
Dividends declared and paid		(59,412)																(42,452)				(16,960)
Stock-based compensation		2,877															2,877
Shares withheld for employee taxes (in shares)						(169,809)	[2]								(169,809)
Shares withheld for employee taxes		(7,396)	(7,396)			$ (7,396)	[2]								$ (2)		(7,394)
Other comprehensive income (loss) unrealized gain (loss) on derivatives			(238)						(238)	(238)	(238)	0	0						(184)			(54)
Reclassification of amortization of forward starting swap included in interest expense		(231)	(231)					(231)											(166)			(65)
Ending balance (in shares) at Dec. 31, 2015															45,407,719
Ending balance at Dec. 31, 2015		828,927													$ 454		863,432	(64,066)	(258)			29,365
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		53,915	53,915	$ 15,238		$ 38,677	[2]											$ 38,677				15,238
Contributions from American Assets Trust, Inc. (in shares)	[2]					1,812,451
Contributions from American Assets Trust, Inc.			72,836			$ 72,836	[2]
Conversion of operating partnership units (in shares)				(5,741)		5,741	[2]
Conversion of operating partnership units				$ (67)		$ 67	[2]
Issuance of restricted units (in shares)	[2]					98,354
Forfeiture of restricted units (in shares)	[2]					(40,687)
Distributions			(59,412)	$ (16,960)		$ (42,452)	[2]
Stock-based compensation			2,877			$ 2,877	[2]
Shares withheld for employee taxes (in shares)						(169,809)	[2]								(169,809)
Shares withheld for employee taxes		$ (7,396)	(7,396)			$ (7,396)	[2]								$ (2)		$ (7,394)
Other comprehensive income (loss) unrealized gain (loss) on derivatives			(238)						$ (238)	$ (238)	$ (238)	$ 0	$ 0						$ (184)			$ (54)
Reclassification of amortization of forward starting swap included in interest expense			(231)
Ending balance (in shares) at Dec. 31, 2015				17,899,516		45,407,719	[2]
Ending balance at Dec. 31, 2015			$ 828,927	$ 29,446		$ 799,820	[2]	$ (339)
[1]	Consists of limited partnership interests held by third parties.
[2]	Consists of general and limited partnership interests held by American Assets Trust, Inc.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OPERATING ACTIVITIES
Net income	$ 53,915	$ 31,145	$ 22,594
Adjustments to reconcile income from continuing operations to net cash provided by operating activities:
Deferred rent revenue and amortization of lease intangibles	(5,587)	(4,623)	(4,997)
Depreciation and amortization	63,392	66,568	66,775
Amortization of debt issuance costs and debt fair value adjustments	4,214	4,075	3,932
Gain on sale of real estate	(7,121)	0	0
Stock-based compensation expense	2,877	3,666	2,845
Settlement of forward interest rate swap agreement	0	1,617	0
Other noncash interest expense	(231)	(39)	0
Other, net	878	(95)	848
Changes in operating assets and liabilities
Change in restricted cash	265	1,198	(755)
Change in accounts receivable	(1,011)	279	(45)
Change in other assets	(243)	(107)	(88)
Change in accounts payable and accrued expenses	(1,081)	1,381	1,167
Change in security deposits payable	493	358	307
Change in other liabilities and deferred credits	(36)	188	151
Net cash provided by operating activities	110,724	105,611	92,734
INVESTING ACTIVITIES
Capital expenditures	(134,174)	(144,674)	(55,675)
Proceeds from sale of real estate, net of selling costs	12,259	0	0
Change in restricted cash, reserves for capital improvements	(893)	(3,068)	453
Leasing commissions	(4,461)	(5,098)	(3,032)
Net cash used in investing activities	(127,269)	(152,840)	(58,254)
FINANCING ACTIVITIES
Change in restricted cash	0	0	(1,400)
Repayment of secured notes payable	(235,980)	(142,276)	(95,420)
Proceeds from term loan	0	100,000	0
Proceeds from unsecured line of credit	65,000	0	93,000
Repayment of unsecured line of credit	35,000	93,000	0
Proceeds from issuance of unsecured notes payable	200,000	150,000	0
Debt issuance costs	(2,881)	(2,141)	0
Proceeds from issuance of common stock, net	72,782	104,107	25,348
Dividends and distributions	(59,412)	(54,311)	(49,500)
Shares withheld for employee taxes	(7,396)	(4,780)	0
Net cash provided by (used in) financing activities	(2,887)	57,599	(27,972)
Net (decrease) increase in cash and cash equivalents	(19,432)	10,370	6,508
Cash and cash equivalents, beginning of period	59,357	48,987	42,479
Cash and cash equivalents, end of period	39,925	59,357	48,987
American Assets Trust, L.P.
OPERATING ACTIVITIES
Net income	53,915	31,145	22,594
Adjustments to reconcile income from continuing operations to net cash provided by operating activities:
Deferred rent revenue and amortization of lease intangibles	(5,587)	(4,623)	(4,997)
Depreciation and amortization	63,392	66,568	66,775
Amortization of debt issuance costs and debt fair value adjustments	4,214	4,075	3,932
Gain on sale of real estate	(7,121)	0	0
Stock-based compensation expense	2,877	3,666	2,845
Settlement of forward interest rate swap agreement	0	1,617	0
Other noncash interest expense	(231)	(39)	0
Other, net	878	(95)	848
Changes in operating assets and liabilities
Change in restricted cash	265	1,198	(755)
Change in accounts receivable	(1,011)	279	(45)
Change in other assets	(243)	(107)	(88)
Change in accounts payable and accrued expenses	(1,081)	1,381	1,167
Change in security deposits payable	493	358	307
Change in other liabilities and deferred credits	(36)	188	151
Net cash provided by operating activities	110,724	105,611	92,734
INVESTING ACTIVITIES
Capital expenditures	(134,174)	(144,674)	(55,675)
Proceeds from sale of real estate, net of selling costs	12,259	0	0
Change in restricted cash, reserves for capital improvements	(893)	(3,068)	453
Leasing commissions	(4,461)	(5,098)	(3,032)
Net cash used in investing activities	(127,269)	(152,840)	(58,254)
FINANCING ACTIVITIES
Change in restricted cash	0	0	(1,400)
Repayment of secured notes payable	(235,980)	(142,276)	(95,420)
Proceeds from term loan	0	100,000	0
Proceeds from unsecured line of credit	65,000	0	93,000
Repayment of unsecured line of credit	35,000	93,000	0
Proceeds from issuance of unsecured notes payable	200,000	150,000	0
Debt issuance costs	(2,881)	(2,141)	0
Contributions from American Assets Trust, Inc.	72,782	104,107	25,348
Dividends and distributions	(59,412)	(54,311)	(49,500)
Shares withheld for employee taxes	(7,396)	(4,780)	0
Net cash provided by (used in) financing activities	(2,887)	57,599	(27,972)
Net (decrease) increase in cash and cash equivalents	(19,432)	10,370	6,508
Cash and cash equivalents, beginning of period	59,357	48,987	42,479
Cash and cash equivalents, end of period	$ 39,925	$ 59,357	$ 48,987

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Business and Organization American Assets Trust, Inc. (which may be referred to in these financial statements as the “company,” “we,” “us,” or “our”) is a Maryland corporation formed on July 16, 2010 that did not have any operating activity until the consummation of our initial public offering (the “Offering”) and the related acquisition on January 19, 2011 of certain assets of a combination of entities whose assets included entities owned and/or controlled by Ernest S. Rady and his affiliates, including the Rady Trust, which in turn owned (1) controlling interests in entities owning 17 properties and the property management business of American Assets, Inc. and (2) noncontrolling interests in entities owning four properties. The company is the sole general partner of American Assets Trust, L.P., a Maryland limited partnership formed on July 16, 2010 (the “Operating Partnership”). The company's operations are carried on through our Operating Partnership and its subsidiaries, including our taxable REIT subsidiary. Since the formation of our Operating Partnership, the company has controlled our Operating Partnership as its general partner and has consolidated its assets, liabilities and results of operations. We are a vertically integrated and self-administered REIT with 131 employees providing substantial in-house expertise in asset management, property management, property development, leasing, tenant improvement construction, acquisitions, repositioning, redevelopment and financing. Any reference to the number of properties or units and square footage or acres; or references to beneficial ownership interests, are unaudited and outside the scope of our independent registered public accounting firm's audit of our financial statements in accordance with the standards of the United States Public Company Accounting Oversight Board. As of December 31, 2015 , we owned or had a controlling interest in 23 office, retail, multifamily and mixed-use operating properties, the operations of which we consolidate. Additionally, as of December 31, 2015 , we owned land at five of our properties that we classify as held for development and construction in progress. A summary of the properties owned by us is as follows: Retail Carmel Country Plaza Del Monte Center Carmel Mountain Plaza Geary Marketplace South Bay Marketplace The Shops at Kalakaua Lomas Santa Fe Plaza Waikele Center Solana Beach Towne Centre Alamo Quarry Market Office Torrey Reserve Campus Lloyd District Portfolio Solana Beach Corporate Centre City Center Bellevue The Landmark at One Market One Beach Street First & Main Multifamily Loma Palisades Imperial Beach Gardens Mariner's Point Santa Fe Park RV Resort Hassalo on Eighth Mixed-Use Waikiki Beach Walk Retail and Embassy Suites™ Hotel Held for Development and Construction in Progress Solana Beach Corporate Centre – Land Solana Beach – Highway 101 – Land Torrey Point (formerly Sorrento Pointe) – Construction in Progress Torrey Reserve – Construction in Progress Lloyd District Portfolio – Construction in Progress Basis of Presentation Our consolidated financial statements include the accounts of the company, our Operating Partnership and our subsidiaries. The equity interests of other investors in our Operating Partnership are reflected as noncontrolling interests. All significant intercompany transactions and balances are eliminated in consolidation. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, referred to as “GAAP,” requires management to make estimates and assumptions that in certain circumstances affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities, and revenues and expenses. These estimates are prepared using management's best judgment, after considering past, current and expected events and economic conditions. Actual results could differ from these estimates. Consolidated Statements of Cash Flows-Supplemental Disclosures The following table provides supplemental disclosures related to the Consolidated Statements of Cash Flows (in thousands): Year Ended December 31, 2015 2014 2013 Supplemental cash flow information Total interest costs incurred $ 54,829 $ 58,455 $ 60,133 Interest capitalized $ 7,569 $ 5,490 $ 2,113 Interest expense $ 47,260 $ 52,965 $ 58,020 Cash paid for interest, net of amounts capitalized $ 42,691 $ 48,032 $ 54,345 Cash paid for income taxes $ 633 $ 404 $ 901 Supplemental schedule of noncash investing and financing activities Accounts payable and accrued liabilities for construction in progress $ (14,733 ) $ 9,908 $ 5,001 Accrued leasing commissions $ (901 ) $ 763 $ 1,385 Accrued placement fees for senior guaranteed notes payable $ — $ 750 $ — Reduction to capital for prepaid equity financing costs $ 54 $ 40 $ 437 Revenue Recognition and Accounts Receivable Our leases with tenants are classified as operating leases. Substantially all such leases contain fixed rent escalations which occur at specified times during the term of the lease. Base rents are recognized on a straight-line basis from when the tenant controls the space through the term of the related lease, net of valuation adjustments, based on management's assessment of credit, collection and other business risks. When we determine that we are the owner of tenant improvements and the tenant has reimbursed us for a portion or all of the tenant improvement costs, we consider the amount paid to be additional rent, which is recognized on a straight-line basis over the term of the related lease. For first generation tenants, in instances in which we fund tenant improvements and the improvements are deemed to be owned by us, revenue recognition will commence when the improvements are substantially completed and possession or control of the space is turned over to the tenant. When we determine that the tenant is the owner of tenant improvements, tenant allowances are recorded as lease incentives and we commence revenue recognition and lease incentive amortization when possession or control of the space is turned over to the tenant for tenant work to begin. Percentage rents, which represent additional rents based upon the level of sales achieved by certain tenants, are recognized at the end of the lease year or earlier if we have determined the required sales level is achieved and the percentage rents are collectible. Real estate tax and other cost reimbursements are recognized on an accrual basis over the periods in which the related expenditures are incurred. Other property income includes parking income, general excise tax billed to tenants and fees charged to tenants at our multifamily properties. Other property income is recognized when earned. We recognize general excise tax gross, with the amounts billed to tenants and customers recorded in other property income and the related taxes paid as rental expense. The general excise tax included in other income was $3.7 million , $3.4 million and $3.5 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. For a tenant to terminate its lease agreement prior to the end of the agreed term, we may require that they pay a fee to cancel the lease agreement. Lease termination fees for which the tenant has relinquished control of the space are generally recognized on the termination date. When a lease is terminated early but the tenant continues to control the space under a modified lease agreement, the lease termination fee is generally recognized evenly over the remaining term of the modified lease agreement. We recognize revenue on the hotel portion of our mixed-use property from the rental of hotel rooms and guest services when the rooms are occupied and services have been provided. Food and beverage sales are recognized when the customer has been served or at the time the transaction occurs. Revenue from room rental is included in rental revenue on the statement of income. Revenue from other sales and services provided is included in other property income on the statement of income. We make estimates of the collectability of our accounts receivable related to minimum rents, straight-line rents, expense reimbursements and other revenue. Accounts receivable and deferred rent receivable are carried net of this allowance for doubtful accounts. We generally do not require collateral or other security from our tenants, other than letters of credit or security deposits. Our determination as to the collectability of accounts receivable and correspondingly, the adequacy of this allowance, is based primarily upon evaluations of individual receivables, current economic conditions, historical experience and other relevant factors. The allowance for doubtful accounts is increased or decreased through bad debt expense. In some cases, primarily relating to straight-line rents, the collection of these amounts extends beyond one year. Our experience relative to unbilled straight-line rents is that a portion of the amounts otherwise recognizable as revenue is never billed to or collected from tenants due to early lease terminations, lease modifications, bankruptcies and other factors. Accordingly, the extended collection period for straight-line rents along with our evaluation of tenant credit risk may result in the nonrecognition of a portion of straight-line rental income until the collection of such income is reasonably assured. If our evaluation of tenant credit risk changes indicating more straight-line revenue is reasonably collectible than previously estimated and realized, the additional straight-line rental income is recognized as revenue. If our evaluation of tenant credit risk changes indicating a portion of realized straight-line rental income is no longer collectible, a reserve and bad debt expense is recorded. At December 31, 2015 and December 31, 2014 , our allowance for doubtful accounts was $0.5 million and $0.8 million , respectively, and our allowance for deferred rent receivables was $1.3 million and $1.2 million , respectively. Total bad debt expense was $0.4 million , $0.2 million and $0.1 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. We recognize gains on sales of properties upon the closing of the transaction with the purchaser. Gains on properties sold are recognized using the full accrual method when (1) the collectability of the sales price is reasonably assured, (2) we are not obligated to perform significant activities after the sale, (3) the initial investment from the buyer is sufficient and (4) other profit recognition criteria have been satisfied. Gains on sales of properties may be deferred in whole or in part until the requirements for gain recognition have been met. Real Estate Land, buildings and improvements are recorded at cost. Depreciation is computed using the straight-line method. Estimated useful lives range generally from 30 years to a maximum of 40 years on buildings and major improvements. Minor improvements, furniture and equipment are capitalized and depreciated over useful lives ranging from 3 years to 15 years . Maintenance and repairs that do not improve or extend the useful lives of the related assets are charged to operations as incurred. Tenant improvements are capitalized and depreciated over the life of the related lease or their estimated useful life, whichever is shorter. If a tenant vacates its space prior to the contractual termination of its lease, the undepreciated balance of any tenant improvements are written off if they are replaced or have no future value. For the years ended December 31, 2015 , 2014 and 2013 , real estate depreciation expense was $54.2 million , $56.0 million and $52.0 million , respectively. Acquisitions of properties are accounted for in accordance with the authoritative accounting guidance on acquisitions and business combinations. Our methodology of allocating the cost of acquisitions to assets acquired and liabilities assumed is based on estimated fair values, replacement cost and appraised values. When we acquire operating real estate properties, the purchase price is allocated to land and buildings, intangibles such as in-place leases, and to current assets and liabilities acquired, if any. Such valuations include a consideration of the noncancelable terms of the respective leases as well as any applicable renewal periods. The fair values associated with below market renewal options are determined based on a review of several qualitative and quantitative factors on a lease-by-lease basis at acquisition to determine whether it is probable that the tenant would exercise its option to renew the lease agreement. These factors include: (1) the type of tenant in relation to the property it occupies, (2) the quality of the tenant, including the tenant's long term business prospects and (3) whether the fixed rate renewal option was sufficiently lower than the fair rental of the property at the date the option becomes exercisable such that it would appear to be reasonably assured that the tenant would exercise the option to renew. The value allocated to in-place leases is amortized over the related lease term and reflected as depreciation and amortization in the statement of income. The value of above and below market leases associated with the original noncancelable lease terms are amortized to rental income over the terms of the respective noncancelable lease periods and are reflected as either an increase (for below market leases) or a decrease (for above market leases) to rental income in the statement of income. The value of the leases associated with below market lease renewal options that are likely to be exercised are amortized to rental income over the respective renewal periods. If a tenant vacates its space prior to contractual termination of its lease or the lease is not renewed, the unamortized balance of any in-place lease value is written off to rental income and amortization expense. Acquisition-related expenses are expensed in the period incurred. Capitalized Costs We capitalize certain costs related to the development and redevelopment of real estate including pre-construction costs, real estate taxes, insurance and construction costs and salaries and related costs of personnel directly involved. Additionally, we capitalize interest costs related to development and significant redevelopment activities. Capitalization of these costs begins when the activities and related expenditures commence and cease when the project is substantially complete and ready for its intended use, at which time the project is placed in service and depreciation commences. Additionally, we make estimates as to the probability of certain development and redevelopment projects being completed. If we determine that the completion of development or redevelopment is no longer probable, we expense all capitalized costs which are not recoverable. Impairment of Long Lived Assets We review for impairment on a property by property basis. Impairment is recognized on properties held for use when the expected undiscounted cash flows for a property are less than its carrying amount at which time the property is written-down to fair value. Properties held for sale are recorded at the lower of the carrying amount or the expected sales price less costs to sell. Financial Instruments The estimated fair values of financial instruments are determined using available market information and appropriate valuation methods. Considerable judgment is necessary to interpret market data and develop estimated fair values. The use of different market assumptions or estimation methods may have a material effect on the estimated fair value amounts. Accordingly, estimated fair values are not necessarily indicative of the amounts that could be realized in current market exchanges. Derivative Instruments At times, we may use derivative instruments to manage exposure to variable interest rate risk. We may enter into interest rate swaps to manage our exposure to variable interest rate risk. If and when we enter into derivative instruments, we ensure that such instruments qualify as cash flow hedges and would not enter into derivative instruments for speculative purposes. Any interest rate swaps associated with our cash flow hedges are recorded at fair value on a recurring basis. We assess effectiveness of our cash flow hedges both at inception and on an ongoing basis. The effective portion of changes in fair value of the interest rate swaps associated with our cash flow hedges is recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into interest expense as interest is incurred on the related variable rate debt. Our cash flow hedges become ineffective if critical terms of the hedging instrument and the debt instrument do not perfectly match such as notional amounts, settlement dates, reset dates, calculation period and LIBOR rate. In addition, we evaluate the default risk of the counterparty by monitoring the credit worthiness of the counterparty. When ineffectiveness exists, the ineffective portion of changes in fair value of the interest rate swaps associated with our cash flow hedges is recognized in earnings in the period affected. We had no hedging instruments outstanding during 2013. Concurrent with the closing of the amended and restated credit facility, we entered into an interest rate swap agreement that is intended to fix the interest rate associated with the term loan at approximately 3.08% through its maturity date and extension options, subject to adjustments based on our consolidated leverage ratio (see Note 8 ). Cash and Cash Equivalents We define cash and cash equivalents as cash on hand, demand deposits with financial institutions and short term liquid investments with an initial maturity of less than 3 months . Cash balances in individual banks may exceed the federally insured limit of $250,000 by the Federal Deposit Insurance Corporation (the "FDIC"). No losses have been experienced related to such accounts. At December 31, 2015 and December 31, 2014 , we had $32.8 million and $32.4 million , respectively, in excess of the FDIC insured limit. At December 31, 2015 and December 31, 2014 , we had $0.1 million and $20.0 million , respectively, in money market funds that are not FDIC insured. Restricted Cash Restricted cash consists of amounts held by lenders to provide for future real estate tax expenditures, insurance expenditures and reserves for capital improvements. Activity for accounts related to real estate tax and insurance expenditures is classified as operating activities in the statement of cash flows. Changes in reserves for capital improvements are classified as investing activities in the statement of cash flows. At December 31, 2015 and 2014 , we had $11.6 million and $11.0 million , respectively, in restricted cash. Other Assets Other assets consist primarily of lease costs, lease incentives, acquired in-place leases, acquired above market leases and debt issuance costs. Capitalized lease costs are direct costs incurred which were essential to originate a lease and would not have been incurred had the leasing transaction not taken place and include third party commissions related to obtaining a lease. Capitalized lease costs are amortized over the life of the related lease and included in depreciation and amortization expense on the statement of income. If a tenant vacates its space prior to the contractual termination of its lease, the unamortized balance of any lease costs are written off. We view these lease costs as part of the up-front initial investment we made in order to generate a long-term cash inflow. Therefore, we classify cash outflows for lease costs as an investing activity in our consolidated statements of cash flows. Costs related to the issuance of debt instruments are capitalized and are amortized as interest expense over the estimated life of the related issue using the straight-line method which approximates the effective interest method. If a debt instrument is paid off prior to its original maturity date, the unamortized balance of debt issuance costs are written off to interest expense or, if significant, included in “early extinguishment of debt.” For the years ended December 31, 2015 , 2014 and 2013 there were no early extinguishments of debt or write offs of debt issuance costs. Variable Interest Entities Certain entities that do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support from other parties or in which equity investors do not have the characteristics of a controlling financial interest qualify as variable interest entities (“VIEs”). VIEs are required to be consolidated by their primary beneficiary. The primary beneficiary of a VIE is the party that has a controlling interest in the VIE. Identifying the party with the controlling interest requires a focus on which entity has the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and (1) the obligation to absorb the expected losses of the VIE or (2) the right to receive the benefits from the VIE. At December 31, 2014 and December 31, 2015 we had no investments in real estate joint ventures, and accordingly we had no VIEs which needed to be consolidated. Stock-Based Compensation We grant stock-based compensation awards to our employees and directors typically in the form of restricted shares of common stock, options to purchase common stock and/or shares of common stock. We measure stock-based compensation expense based on the fair value of the award on the grant date and recognize the expense ratably over the vesting period. Deferred Compensation Our Operating Partnership has adopted the American Assets Trust Executive Deferral Plan V (“EDP V”) and the American Assets Trust Executive Deferral Plan VI (“EDP VI”). These plans were adopted by our Operating Partnership as successor plans to those deferred compensation plans maintained by American Assets Inc. ("AAI") in which certain employees of AAI, who were transferred to us in connection with the Offering (the “Transferred Participants”), participated prior to the Offering. EDP V and EDP VI contain substantially the same terms and conditions as these predecessor plans. AAI transferred to our Operating Partnership the Transferred Participants' account balances under the predecessor plans. These transferred account balances represent amounts deferred by the Transferred Participants prior to the Offering while they were employed by AAI. At the time eligible participants defer compensation, we record compensation cost and a corresponding deferred compensation plan liability, which is included in other liabilities and deferred credits on our consolidated balance sheets. This liability is adjusted to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each participant, and the impact of adjusting the liability to fair value is recorded as an increase or decrease to compensation cost. Income Taxes We elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”) commencing with the taxable year ending December 31, 2011. To maintain our qualification as a REIT, we are required to distribute at least 90% of our REIT taxable income to our stockholders and meet the various other requirements imposed by the Code relating to such matters as operating results, asset holdings, distribution levels and diversity of stock ownership. Provided we maintain our qualification for taxation as a REIT, we are generally not subject to corporate level income tax on the earnings distributed currently to our stockholders that we derive from our REIT qualifying activities. If we fail to maintain our qualification as a REIT in any taxable year, and are unable to avail ourselves of certain savings provisions set forth in the Code, all of our taxable income would be subject to federal income tax at regular corporate rates, including any applicable alternative minimum tax. We are subject to certain state and local income taxes. We, together with one of our subsidiaries, have elected to treat such subsidiary as a taxable REIT subsidiary (a “TRS”) for federal income tax purposes. Certain activities that we undertake must be conducted by a TRS, such as non-customary services for our tenants, and holding assets that we cannot hold directly. A TRS is subject to federal and state income taxes. Segment Information Segment information is prepared on the same basis that our management reviews information for operational decision-making purposes. We operate in four business segments: the acquisition, redevelopment, ownership and management of retail real estate, office real estate, multifamily real estate and mixed-use real estate. The products for our retail segment primarily include rental of retail space and other tenant services, including tenant reimbursements, parking and storage space rental. The products for our office segment primarily include rental of office space and other tenant services, including tenant reimbursements, parking and storage space rental. The products for our multifamily segment include rental of apartments and other tenant services. The products of our mixed-use segment include rental of retail space and other tenant services, including tenant reimbursements, parking and storage space rental and operation of a 369 -room all-suite hotel. Recent Accounting Pronouncements In April 2014, the FASB issued ASU 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. ASU 2014-08 revises the definition of a discontinued operation to a disposal, sale or held-for-sale component or group of components that represents a strategic shift that will have a major effect on an entity's operations and financial results. This pronouncement is effective in 2015, however, calendar year-end companies may early adopt during the first quarter of 2014. We have chosen to early adopt this pronouncement and it became effective for us in the first quarter of 2014. The adoption of this pronouncement resulted in the gain on sale of real estate of $7.1 million for the year ended December 31, 2015 included in continuing operations as opposed to discontinued operations under the previous standard. In May 2014, the FASB issued Update No. 2014-09, Revenue from Contracts with Customers. Update No. 2014-09 establishes that companies may recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This pronouncement is effective for annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period; early adoption is not permitted. We are in the process of evaluating the impact this pronouncement will have on our consolidated financial statements. In February 2015, the FASB issued an ASU that requires reporting entities to evaluate whether they should consolidate certain legal entities. The ASU modifies the evaluation of whether limited partnerships and similar legal entities are VIEs or voting interest entities and eliminates the presumption that a general partner should consolidate a limited partnership. This affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The ASU is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply the amendments in the ASU using: (i) a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption; or (ii) by applying the amendments retrospectively. We do not expect the adoption of this pronouncement to have a significant impact on our consolidated financial statements. In April 2015, the FASB issued an ASU that requires reporting entities to present debt issuance cost related to a note as a direct deduction from the face amount of that note presented in the balance sheet. The ASU requires the amortization of debt issuance costs presented as interest expense. The ASU is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply the amendments in the ASU retrospectively to all prior periods. We do not expect the adoption of this pronouncement to have a significant impact on our consolidated financial statements.

Real Estate (Notes)

Real Estate (Notes)	12 Months Ended
	Dec. 31, 2015
Real Estate [Abstract]
REAL ESTATE	REAL ESTATE A summary of our real estate investments is as follows (in thousands): Retail Office Multifamily Mixed-Use Total December 31, 2015 Land $ 245,588 $ 143,575 $ 24,696 $ 76,635 $ 490,494 Buildings 500,075 665,431 210,093 125,860 1,501,459 Land improvements 40,203 8,273 3,280 2,363 54,119 Tenant improvements 54,993 63,880 — 1,846 120,719 Furniture, fixtures, and equipment 491 1,265 7,638 5,671 15,065 Construction in progress 20,817 41,669 1,649 37 64,172 (1) 862,167 924,093 247,356 212,412 2,246,028 Accumulated depreciation (223,274 ) (127,320 ) (38,626 ) (21,946 ) (411,166 ) Net real estate $ 638,893 $ 796,773 $ 208,730 $ 190,466 $ 1,834,862 December 31, 2014 Land $ 248,386 $ 143,575 $ 25,507 $ 76,635 $ 494,103 Buildings 500,088 621,343 42,270 125,798 1,289,499 Land improvements 39,999 8,273 3,085 2,363 53,720 Tenant improvements 50,504 56,127 — 1,679 108,310 Furniture, fixtures, and equipment 491 750 5,832 5,383 12,456 Construction in progress 5,327 31,878 141,205 326 178,736 (1) 844,795 861,946 217,899 212,184 2,136,824 Accumulated depreciation (205,339 ) (104,092 ) (35,431 ) (16,562 ) (361,424 ) Net real estate $ 639,456 $ 757,854 $ 182,468 $ 195,622 $ 1,775,400 (1) Land related to held for development and construction in progress is included in the Held for Development and Construction in Progress classifications on the consolidated balance sheets. Dispositions On August 6, 2015, we sold Rancho Carmel Plaza. The property is located in San Diego, California and was previously included in our retail segment. The sales price of this property of approximately $12.7 million , less costs to sell, resulted in net proceeds to us of approximately $12.3 million . Accordingly, we recorded a gain on sale of approximately $7.1 million for the year ended December 31, 2015.

Acquired In-Place Leases and Ab

Acquired In-Place Leases and Above/Below Market Leases (Notes)	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
ACQUIRED IN-PLACE LEASES AND ABOVE/BELOW MARKET LEASES	ACQUIRED IN-PLACE LEASES AND ABOVE/BELOW MARKET LEASES The following summarizes our acquired lease intangibles, which are included in other assets and other liabilities and deferred credits (in thousands): December 31, 2015 December 31, 2014 In-place leases $ 52,289 $ 53,967 Accumulated amortization (38,425 ) (35,336 ) Above market leases 22,201 22,500 Accumulated amortization (18,864 ) (17,397 ) Acquired lease intangible assets, net $ 17,201 $ 23,734 Below market leases $ 68,973 $ 70,013 Accumulated accretion (30,806 ) (27,161 ) Acquired lease intangible liabilities, net $ 38,167 $ 42,852 The value allocated to in-place leases is amortized over the related lease term as depreciation and amortization expense in the statement of income. Above and below market leases are amortized over the related lease term as additional rental income for below market leases or a reduction of rental income for above market leases in the statement of income. Rental income (loss) includes net amortization from acquired above and below market leases of $2.9 million , $2.8 million and $2.4 million in 2015 , 2014 and 2013 , respectively. The remaining weighted-average amortization period as of December 31, 2015 , is 2.0 years, 0.7 years and 7.8 years for in-place leases, above market leases and below market leases, respectively. Below market leases include $17.5 million related to below market renewal options, and the weighted-average period prior to the commencement of the renewal options is 9.8 years. Increases (decreases) in net income as a result of amortization of our in-place leases, above market leases and below market leases are as follows (in thousands): Year Ended December 31, 2015 2014 2013 Amortization of in-place leases $ (4,767 ) $ (5,903 ) $ (9,120 ) Amortization of above market leases (1,767 ) (2,296 ) (4,052 ) Amortization of below market leases 4,686 5,057 6,440 Net loss $ (1,848 ) $ (3,142 ) $ (6,732 ) As of December 31, 2015 , the amortization for acquired leases during the next five years and thereafter, assuming no early lease terminations, is as follows (in thousands): In-Place Leases Above Market Leases Below Market Leases Year Ending December 31, 2016 $ 3,931 $ 1,248 $ 4,605 2017 3,189 932 4,235 2018 1,893 628 3,572 2019 1,452 319 3,481 2020 909 99 2,917 Thereafter 2,490 111 19,357 $ 13,864 $ 3,337 $ 38,167

Fair Value of Financial Instrum

Fair Value of Financial Instruments (Notes)	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
FAIR VALUE OF FINANCIAL INSTRUMENTS	FAIR VALUE OF FINANCIAL INSTRUMENTS A fair value measurement is based on the assumptions that market participants would use in pricing an asset or liability. The hierarchy for inputs used in measuring fair value is as follows: 1. Level 1 Inputs—quoted prices in active markets for identical assets or liabilities 2. Level 2 Inputs—observable inputs other than quoted prices in active markets for identical assets and liabilities 3. Level 3 Inputs—unobservable inputs In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement. Except as disclosed below, the carrying amount of our financial instruments approximates their fair value. Financial assets and liabilities whose fair values we measure on a recurring basis using Level 2 inputs consist of our deferred compensation liability and interest rate swap liability. We measure the fair values of these liabilities based on prices provided by independent market participants that are based on observable inputs using market-based valuation techniques provided by third parties using proprietary valuation models and analytical tools as of December 31, 2015 and 2014 . These valuation models and analytical tools use market pricing or similar instruments that are both objective and publicly available, including matrix pricing or reported trades, benchmark yields, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids and/or offers. A summary of our financial liabilities that are measured at fair value on a recurring basis by level within the fair value hierarchy is as follows (in thousands): December 31, 2015 December 31, 2014 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Deferred compensation liability $ — $ 929 $ — $ 929 $ — $ 981 $ — $ 981 Interest rate swap liability $ — $ 1,686 $ — $ 1,686 $ — $ 1,448 $ — $ 1,448 The fair value of our secured notes payable and unsecured notes payable is sensitive to fluctuations in interest rates. Discounted cash flow analysis (Level 2) is generally used to estimate the fair value of our mortgages and notes payable, using rates ranging from 3.5% to 6.4% . Considerable judgment is necessary to estimate the fair value of financial instruments. The estimates of fair value presented herein are not necessarily indicative of the amounts that could be realized upon disposition of the financial instruments. The carrying values of our line of credit and term loan set forth below are deemed to be at fair value since the outstanding debt is directly tied to monthly LIBOR contracts. A summary of the carrying amount and fair value of our financial instruments, all of which are based on Level 2 inputs, is as follows (in thousands): December 31, 2015 December 31, 2014 Carrying Value Fair Value Carrying Value Fair Value Secured notes payable $ 579,743 $ 592,956 $ 812,811 $ 850,475 Unsecured term loan $ 100,000 $ 100,000 $ 100,000 $ 100,000 Unsecured senior guaranteed notes $ 350,000 $ 357,779 $ 150,000 $ 154,560 Unsecured line of credit $ 30,000 $ 30,000 $ — $ —

Other Assets (Notes)

Other Assets (Notes)	12 Months Ended
	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
OTHER ASSETS	OTHER ASSETS Other assets consist of the following (in thousands): December 31, 2015 December 31, 2014 Leasing commissions, net of accumulated amortization of $23,565 and $20,659 respectively $ 18,952 $ 19,484 Acquired above market leases, net 3,337 5,103 Acquired in-place leases, net 13,864 18,631 Lease incentives, net of accumulated amortization of $3,341 and $2,960, respectively 509 740 Other intangible assets, net of accumulated amortization of $1,904 and $1,590, respectively 941 453 Debt issuance costs, net of accumulated amortization of $4,648 and $4,147, respectively 4,130 5,361 Prepaid expenses, deposits and other 4,336 3,629 Total other assets $ 46,069 $ 53,401 Lease incentives are amortized over the term of the related lease and included as a reduction of rental income in the statement of income.

Other Liabilities and Deferred

Other Liabilities and Deferred Credits (Notes)	12 Months Ended
	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
OTHER LIABILITIES AND DEFERRED CREDITS	OTHER LIABILITIES AND DEFERRED CREDITS Other liabilities and deferred credits consist of the following (in thousands): December 31, 2015 December 31, 2014 Acquired below market leases, net $ 38,167 $ 42,852 Prepaid rent and deferred revenue 8,203 7,288 Interest rate swap liability 1,686 1,448 Straight-line rent liability 2,319 2,533 Deferred rent expense and lease intangible 434 584 Deferred compensation 929 981 Deferred tax liability 174 219 Other liabilities 60 88 Total other liabilities and deferred credits, net $ 51,972 $ 55,993 Straight-line rent liability relates to leases which have rental payments that decrease over time or one-time upfront payments for which the rental revenue is deferred and recognized on a straight-line basis.

Debt (Notes)

Debt (Notes)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
DEBT	DEBT Debt of American Assets Trust, Inc. American Assets Trust, Inc. does not hold any indebtedness. All debt is held directly or indirectly by the Operating Partnership; however, American Assets Trust, Inc. has guaranteed the Operating Partnership's amended and restated credit facility, term loan and carve-out guarantees on property-level debt. Debt of American Assets Trust, L.P. Secured notes payable The following is a summary of the Operating Partnership's total secured notes payable outstanding as of December 31, 2015 and December 31, 2014 (in thousands): Description of Debt Principal Balance as of Stated Interest Rate Stated Maturity Date December 31, 2015 December 31, 2014 as of December 31, 2015 The Shops at Kalakaua (1)(2) — 19,000 — % May 1, 2015 The Landmark at One Market (1)(3) — 133,000 — % July 5, 2015 Del Monte Center (1)(4) — 82,300 — % July 8, 2015 First & Main (1) 84,500 84,500 3.97 % July 1, 2016 Imperial Beach Gardens (1) 20,000 20,000 6.16 % September 1, 2016 Mariner’s Point (1) 7,700 7,700 6.09 % September 1, 2016 South Bay Marketplace (1) 23,000 23,000 5.48 % February 10, 2017 Waikiki Beach Walk—Retail (1) 130,310 130,310 5.39 % July 1, 2017 Solana Beach Corporate Centre III-IV (5) 35,920 36,376 6.39 % August 1, 2017 Loma Palisades (1) 73,744 73,744 6.09 % July 1, 2018 One Beach Street (1) 21,900 21,900 3.94 % April 1, 2019 Torrey Reserve—North Court (5) 20,749 21,075 7.22 % June 1, 2019 Torrey Reserve—VCI, VCII, VCIII (5) 6,995 7,101 6.36 % June 1, 2020 Solana Beach Corporate Centre I-II (5) 11,119 11,302 5.91 % June 1, 2020 Solana Beach Towne Centre (5) 37,065 37,675 5.91 % June 1, 2020 City Center Bellevue (1) 111,000 111,000 3.98 % November 1, 2022 Total 584,002 819,983 Unamortized fair value adjustment (4,259 ) (7,172 ) Total Secured Notes Payable $ 579,743 $ 812,811 (1) Interest only. (2) Loan repaid in full, without premium or penalty, on February 2, 2015. (3) Loan repaid in full, without premium or penalty, on April 6, 2015. (4) Loan repaid in full, without premium or penalty, on February 6, 2015. (5) Principal payments based on a 30 -year amortization schedule. Unsecured notes payable The following is a summary of the Operating Partnership's total unsecured notes payable outstanding as of December 31, 2015 and December 31, 2014 (in thousands): Description of Debt Principal Balance as of Stated Interest Rate Stated Maturity Date December 31, 2015 December 31, 2014 as of December 31, 2015 Term Loan $ 100,000 $ 100,000 Variable (1) January 9, 2019 (2) Senior Guaranteed Notes, Series A 150,000 150,000 4.04 % (3) October 31, 2021 Senior Guaranteed Notes, Series B 100,000 — 4.45 % February 2, 2025 Senior Guaranteed Notes, Series C 100,000 — 4.50 % April 1, 2025 Total Unsecured Notes Payable $ 450,000 $ 250,000 (1) The company has entered into an interest rate swap agreement that is intended to fix the interest rate associated with the Term Loan at approximately 3.08% through its maturity date and extension options, subject to adjustments based on the Operating Partnership's consolidated leverage ratio. (2) The Operating Partnership has an option to extend the Term Loan up to two times, with each such extension for a 12 -month period. The foregoing extension options are exercisable by the Operating Partnership subject to the satisfaction of certain conditions. (3) The company entered into a one -month forward-starting seven -year swap contract on August 19, 2014, which was settled on September 19, 2014 at a gain of approximately $1.6 million (see Note 8 ). The forward-starting seven-year swap contract was deemed to be a highly effective cash flow hedge, accordingly, the effective interest rate is approximately 3.88% per annum. On October 31, 2014, the Operating Partnership entered into a note purchase agreement (the "Note Purchase Agreement") with a group of institutional purchasers that provided for the private placement of an aggregate of $350 million of senior guaranteed notes, of which (i) $150 million are designated as 4.04% Senior Guaranteed Notes, Series A, due October 31, 2021 (the “Series A Notes”), (ii) $100 million are designated as 4.45% Senior Guaranteed Notes, Series B, due February 2, 2025 (the “Series B Notes”) and (iii) $100 million are designated as 4.50% Senior Guaranteed Notes, Series C, due April 1, 2025 (the “Series C Notes”, and collectively with the Series A Notes and Series B Notes, are referred to herein as, the “Notes”). The Series A Notes were issued on October 31, 2014, the Series B Notes were issued on February 2, 2015 and the Series C Notes were issued on April 2, 2015. The Notes will pay interest quarterly on the last day of January, April, July and October until their respective maturities. The Operating Partnership may prepay at any time all, or from time to time any part of, the Notes, in an amount not less than 5% of the aggregate principal amount of any series of the Notes then outstanding in the case of a partial prepayment, at 100% of the principal amount so prepaid plus a Make-Whole Amount (as defined in the Note Purchase Agreement). The Note Purchase Agreement contains a number of customary financial covenants, including, without limitation, tangible net worth thresholds, secured and unsecured leverage ratios and fixed charge coverage ratios. Subject to the terms of the Note Purchase Agreement and the Notes, upon certain events of default, including, but not limited to, (i) a default in the payment of any principal, Make-Whole Amount or interest under the Notes, and (ii) a default in the payment of certain other indebtedness by us or our subsidiaries, the principal, accrued and unpaid interest, and the Make-Whole Amount on the outstanding Notes will become due and payable at the option of the purchasers. The Operating Partnership's obligations under the Notes are fully and unconditionally guaranteed by the Operating Partnership and certain of the Operating Partnership's subsidiaries. Certain loans require the Operating Partnership to comply with various financial covenants, including the maintenance of minimum debt coverage ratios. As of December 31, 2015 , the Operating Partnership was in compliance with all loan covenants. Scheduled principal payments on secured and unsecured notes payable as of December 31, 2015 are as follows (in thousands): 2016 $ 113,974 2017 190,139 2018 75,224 2019 142,662 2020 51,003 Thereafter 461,000 $ 1,034,002 Credit Facility On January 19, 2011, the company and the Operating Partnership entered into a revolving credit facility, or the credit facility. A group of lenders for which an affiliate of Merrill Lynch, Pierce, Fenner & Smith Incorporated acts as administrative agent and joint arranger, and an affiliate of Wells Fargo Securities, LLC acts as syndication agent and joint arranger, provided commitments for a revolving credit facility allowing borrowings of up to $250.0 million . The credit facility also had an accordion feature that allowed the Operating Partnership to increase the availability thereunder up to a maximum of $400.0 million , subject to meeting specified requirements and obtaining additional commitments from lenders. The credit facility bore interest at the rate of either LIBOR or a base rate, in each case plus a margin that varied depending on our leverage ratio. The amount available for us to borrow under the credit facility was subject to the net operating income of our properties that form the borrowing base of the facility and a minimum implied debt yield of such properties. On March 7, 2011, the credit facility was amended to allow the company or the Operating Partnership to purchase GNMA securities with maturities of up to 30 years. On January 10, 2012, the credit facility was amended a second time to (1) extend the maturity date to January 10, 2016 (with a one -year extension option), (2) decrease the applicable interest rates and (3) modify certain financial covenants contained therein. On September 7, 2012, the credit facility was amended a third time to allow our consolidated total secured indebtedness to be up to 55% of our secured total asset value for the period commencing upon the date that a material acquisition (generally, greater than $100 million ) was consummated through and including the last day of the third fiscal quarter that followed such date. On January 9, 2014, the company and the Operating Partnership entered into an amended and restated credit agreement, or the amended and restated credit facility, which amended and restated the then in-place credit facility. The amended and restated credit facility provides for aggregate, unsecured borrowing of $350 million , consisting of a revolving line of credit of $250 million (the "Revolver Loan") and a term loan of $100 million (the "Term Loan"). The amended and restated credit facility has an accordion feature that may allow the Operating Partnership to increase the availability thereunder up to an additional $250 million , subject to meeting specified requirements and obtaining additional commitments from lenders. At December 31, 2015, $30 million was outstanding under the Revolver Loan. On October 16, 2014, we entered into a first amendment to the amended and restated credit agreement that amends provisions of the amended and restated credit agreement to, among other things, (1) describe the treatment of our pari passu obligations under the amended and restated credit agreement and (2) remove the material acquisition provisions previously set forth in the amended and restated credit agreement. Borrowings under the amended and restated credit facility initially bear interest at floating rates equal to, at our option, either (1) LIBOR , plus a spread which ranges from (a) 1.35% - 1.95% (with respect to the Revolver Loan) and (b) 1.30% to 1.90% (with respect to the Term Loan), in each case based on our consolidated leverage ratio, or (2) a base rate equal to the highest of (a) the prime rate , (b) the federal funds rate plus 50 bps or (c) the Eurodollar rate plus 100 bps, plus a spread which ranges from (i) 0.35% - 0.95% (with respect to the Revolver Loan) and (ii) 0.30% to 0.90% (with respect to the Term Loan), in each case based on our consolidated leverage ratio. The foregoing rates are more favorable than previously contained in the credit agreement in place as of December 31, 2013. If American Assets Trust, Inc. obtains an investment-grade debt rating, under the terms set forth in the amended and restated credit facility, the spreads will further improve. For the year-ended December 31, 2015, the weighted average interest rate on the Revolver Loan was 1.54% . The Revolver Loan initially matures on January 9, 2018, subject to the Operating Partnership's option to extend the Revolver Loan up to two times, with each such extension for a six -month period. The Term Loan initially matures on January 9, 2016, subject to our option to extend the Term Loan up to three times, with each such extension for a 12 -month period. The foregoing extension options are exercisable by us subject to the satisfaction of certain conditions. Effective as of January 8, 2016, the Operating Partnership exercised the first of three options to extend the maturity date of the Term Loan to January 9, 2017. Concurrent with the closing of the amended and restated credit facility, the Operating Partnership drew down on the entirety of the $100 million Term Loan remains outstanding and is included in unsecured notes payable as discussed above. Additionally, the amended and restated credit facility includes a number of financial covenants, including: • A maximum leverage ratio (defined as total indebtedness net of certain cash and cash equivalents to total asset value) of 60% , • A maximum secured leverage ratio (defined as total secured debt to secured total asset value) of 40% , • A minimum fixed charge coverage ratio (defined as consolidated earnings before interest, taxes, depreciation and amortization to consolidated fixed charges) of 1.50x, • A minimum unsecured interest coverage ratio of 1.75x, • A maximum unsecured leverage ratio of 60% , • A minimum tangible net worth of $721.16 million , and 75% of the net proceeds of any additional equity issuances (other than additional equity issuances in connection with any dividend reinvestment program), and • Recourse indebtedness at any time cannot exceed 15% of total asset value. The amended and restated credit facility provides that American Assets Trust, Inc.'s annual distributions may not exceed the greater of (1) 95% of our funds from operations (“FFO”) or (2) the amount required for us to (a) qualify and maintain our REIT status and (b) avoid the payment of federal or state income or excise tax. If certain events of default exist or would result from a distribution, we may be precluded from making distributions other than those necessary to qualify and maintain our status as a REIT. American Assets Trust, Inc. and certain of its subsidiaries guaranteed the obligations under the amended and restated credit facility, and certain of its subsidiaries pledged specified equity interests in our subsidiaries as collateral for our obligations under the amended and restated credit facility. As of December 31, 2015 , the Operating Partnership was in compliance with all then in-place amended and restated credit facility covenants.

Derivative and Hedging (Notes)

Derivative and Hedging (Notes)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE AND HEDGING ACTIVITIES	DERIVATIVE AND HEDGING ACTIVITIES Our objectives in using interest rate derivatives are to add stability to interest expense and to manage exposure to interest rate movement. To accomplish these objectives, we use interest rate swaps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for us making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Concurrent with the closing of our amended and restated credit facility, we entered into an interest rate swap agreement that is intended to fix the interest rate associated with our term loan of $100 million at approximately 3.08% through its maturity date and extension options, subject to adjustments based on our consolidated leverage ratio. The following is a summary of the terms of the interest rate swap as of December 31, 2015 (dollars in thousands): Swap Counterparty Notional Amount Effective Date Maturity Date Fair Value Bank of America, N.A. $100,000 1/9/2014 1/9/2019 $ 1,686 The effective portion of changes in the fair value of the derivatives that are designated as cash flow hedges are being recorded as accumulated other comprehensive income and will be subsequently reclassified into earnings during the period in which the hedged forecasted transaction affects earnings. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of the derivative. This analysis reflects the contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs, including interest rate curves, and implied volatilities. The fair value of the interest rate swaps is determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves. Forward Starting Swap On August 19, 2014, we entered into a one -month forward-starting seven -year swap contract with Wells Fargo Bank, N.A. to reduce the interest rate variability exposure of the projected interest cash flows of our then-prospective Series A Notes. The forward-starting seven-year swap contract had a notional amount of $150 million , a termination date of October 31, 2014, a fixed pay rate of 2.1305% , a receive rate equal to the one-month LIBOR, with fixed rate payments due quarterly on the last day of each January, April, July and October commencing January 30, 2015, floating payments due quarterly on the last day of each January, April, July and October commencing January 30, 2015, and floating reset dates two days prior to the first day of each calculation period. The forward-starting seven-year swap contract's accrual period, October 31, 2014 to October 31, 2021, was designed to match the expected tenor of the Series A Notes. The forward-starting seven-year swap contract was deemed to be a highly effective cash flow hedge and we elected to designate the forward-starting swap contract as an accounting hedge. We settled the forward-starting seven-year swap contract on September 19, 2014, resulting in a gain of approximately $1.6 million . This gain is included in accumulated other comprehensive income and will be amortized to interest expense over the life of the Series A Notes.

Partners Capital of American As

Partners Capital of American Assets Trust, L.P. (Notes)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
PARTNERS' CAPITAL OF AMERICAN ASSETS TRUST, L.P.	PARTNERS' CAPITAL OF AMERICAN ASSETS TRUST, L.P. As of December 31, 2015 , the Operating Partnership had 17,899,516 common units (the “Noncontrolling Common Units”) outstanding. American Assets Trust, Inc. owned 71.7% of the Operating Partnership at December 31, 2015 . The remaining 28.3% of the partnership interests are owned by non-affiliated investors and certain of our directors and executive officers. Common units and shares of the company's common stock have essentially the same economic characteristics in that common units and shares of the company's common stock share equally in the total net income or loss distributions of the Operating Partnership. American Assets Trust, Inc. is the Operating Partnership’s general partner and is responsible for the management of the Operating Partnership’s business. As the general partner of the Operating Partnership, the company effectively controls the ability to issue common stock of American Assets Trust, Inc. upon a limited partner’s notice of redemption. Investors who own common units have the right to cause the Operating Partnership to redeem any or all of their common units for cash equal to the then-current market value of one share of the company's common stock, or, at the company's election, shares of the company's common stock on a one-for-one basis. In addition, American Assets Trust, Inc. has generally acquired common units upon a limited partner’s notice of redemption in exchange for shares of the company's common stock. The redemption provisions of common units owned by limited partners that permit the Operating Partnership to settle in either cash or common stock at the option of the company are further evaluated in accordance with applicable accounting guidance to determine whether temporary or permanent equity classification on the balance sheet is appropriate. The Operating Partnership evaluated this guidance, including the requirement to settle in unregistered shares, and determined that these common units meet the requirements to qualify for presentation as permanent equity. During the years ended December 31, 2015 , 2014 and 2013 , approximately 5,741 , 11,852 and 106,326 , respectively, common units were converted into shares of the company's common stock.

Equity of American Assets Trust

Equity of American Assets Trust, Inc. (Notes)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
EQUITY OF AMERICAN ASSETS TRUST, INC.	EQUITY OF AMERICAN ASSETS TRUST, INC. Stockholders' Equity On May 6, 2013, we entered into an at-the-market (“ATM”) equity program with four sales agents pursuant to which we may, from time to time, offer and sell shares of our common stock having an aggregate offering price of up to $150.0 million . We completed $150.0 million of issuances under such ATM program on May 21, 2015. On May 27, 2015, we entered into a new ATM equity program with five sales agents under which we may, from time to time, offer and sell shares of our common stock having an aggregate offering price of up to $250.0 million . The sales of shares of our common stock made through the ATM equity program are made in "at-the-market" offerings as defined in Rule 415 of the Securities Act of 1933, as amended ("the Securities Act"). For the year ended December 31, 2015 , we issued 1,612,451 shares of common stock through the ATM equity program at a weighted average price per share of $40.77 for gross proceeds of $65.7 million and paid $0.7 million in sales agent compensation and $0.4 million in additional offering expenses related to the sales of these shares of common stock. As of December 31, 2015 , we had the capacity to issue up to an additional $216.6 million in shares of our common stock under our active ATM equity program. Actual future sales will depend on a variety of factors including, but not limited to, market conditions, the trading price of our common stock and our capital needs. We have no obligation to sell the remaining shares available for sale under the active ATM equity program. On March 9, 2015, we entered into a common stock purchase agreement (the “Purchase Agreement”) with Explorer Insurance Company, a California corporation ("EIC"), an entity owned and controlled by Ernest Rady, our Chairman, President and Chief Executive Officer. The Purchase Agreement provided for the sale by us to EIC, in a private placement, of 200,000 shares of our common stock at a purchase price of $40.54 per share, resulting in gross proceeds to us of approximately $8.1 million . The price per share paid by EIC was equal to the closing price of a share of our common stock on the New York Stock Exchange on the date of the Purchase Agreement. These shares were registered on March 27, 2015 by virtue of our filing of a prospectus supplement to our universal shelf registration statement on Form S-3 filed on February 6, 2015. On September 12, 2014, we entered into a common stock purchase agreement (the “Purchase Agreement”) with Insurance Company of the West, a California corporation ("ICW") which is an insurance company owned and controlled by Ernest Rady. The Purchase Agreement provided for the sale by the company to ICW, in a private placement, of 400,000 shares of the company's common stock at a purchase price of $33.76 per share, resulting in gross proceeds to the company of approximately $13.5 million . The price per share paid by ICW was equal to the closing price of a share of the company's common stock on the New York Stock Exchange on the date of the Purchase Agreement. These shares were registered in connection with the filing of our universal shelf registration statement on Form S-3 ASR on February 6, 2015. Preferred Stock Authorized Shares We have been authorized to issue 10,000,000 shares of preferred stock with a par value of $0.01 , of which no shares were outstanding at December 31, 2015 . Upon issuance, our Board of Directors has the ability to define the terms of the preferred shares, including voting rights, liquidation preferences, conversion and redemption provisions and dividend rates. Dividends The following table lists the dividends declared and paid on our shares of common stock and Noncontrolling Common Units for the years ended December 31, 2015 , 2014 and 2013 : Period Amount per Share/Unit Period Covered Dividend Paid Date First Quarter 2013 $ 0.2100 January 1, 2013 to March 31, 2013 March 29, 2013 Second Quarter 2013 $ 0.2100 April 1, 2013 to June 30, 2013 June 28, 2013 Third Quarter 2013 $ 0.2100 July 1, 2013 to September 30, 2013 September 27, 2013 Fourth Quarter 2013 $ 0.2200 October 1, 2013 to December 31, 2013 December 27, 2013 First Quarter 2014 $ 0.2200 January 1, 2014 to March 31, 2014 March 28, 2014 Second Quarter 2014 $ 0.2200 April 1, 2014 to June 30, 2014 June 27, 2014 Third Quarter 2014 $ 0.2200 July 1, 2014 to September 30, 2014 September 26, 2014 Fourth Quarter 2014 $ 0.2325 October 1, 2014 to December 31, 2014 December 26, 2014 First Quarter 2015 $ 0.2325 January 1, 2015 to March 31, 2015 March 27, 2015 Second Quarter 2015 $ 0.2325 April 1, 2015 to June 30, 2015 June 26, 2015 Third Quarter 2015 $ 0.2325 July 1, 2015 to September 30, 2015 September 25, 2015 Fourth Quarter 2015 $ 0.2500 October 1, 2015 to December 31, 2015 December 23, 2015 Taxability of Dividends Earnings and profits, which determine the taxability of distributions to stockholders and holders of common units, may differ from income reported for financial reporting purposes due to the differences for federal income tax purposes in the treatment of loss on extinguishment of debt, revenue recognition and compensation expense and in the basis of depreciable assets and estimated useful lives used to compute depreciation. A summary of the income tax status of dividends per share paid is as follows: Year Ended December 31, 2015 2014 2013 Per Share % Per Share % Per Share % Ordinary income $ 0.72 75.9 % $ 0.61 68.9 % $ 0.83 97.6 % Capital gain 0.04 4.4 % — — % — — % Return of capital 0.19 19.7 % 0.28 31.1 % 0.02 2.4 % Total $ 0.95 100.0 % $ 0.89 100.0 % $ 0.85 100.0 % Stock-Based Compensation The company has established the 2011 Equity Incentive Award Plan (the "2011 Plan"), which provides for grants to directors, employees and consultants of the company and the Operating Partnership of stock options, restricted stock, dividend equivalents, stock payments, performance shares, LTIP units, stock appreciation rights and other incentive awards. An aggregate of 4,054,411 shares of our common stock are authorized for issuance under awards granted pursuant to the 2011 Plan, and as of December 31, 2015 , 3,093,627 shares of common stock remain available for future issuance. The following shares of restricted common stock have been issued as of December 31, 2015 : Grant Price at Grant Date Number January 19, 2012 (1) $11.91 - $12.61 2,000 July 10, 2012 (2) $25.05 8,015 July 13, 2013 (2) $31.97 5,004 March 25, 2014 (3) $28.89 - $31.25 112,119 June 17, 2014 (4) $34.10 5,864 December 1, 2014 (5) $36.28 - $36.32 98,765 June 16, 2015 (4) $39.64 5,044 December 1, 2015 (6) $13.67 - $26.39 93,310 (1) Restricted common stock issued to certain of the company's senior management and other employees, which are subject to performance-based vesting. These shares vest in two substantially equal installments, with the first installment vested on the third anniversary of the date of grant and the second installment vesting on the fourth anniversary of the date of grant, subject to the employee's continued employment on those dates. (2) Restricted common stock issued to members of the company's non-employee directors. These awards of restricted stock vest ratably as to one-third of the shares granted on each of the first three anniversaries of the date of grant, subject to the director's continued service on our Board of Directors. (3) Restricted common stock issued to certain of the company's senior management and other employees, which are subject to pre-defined market specific performance criteria based vesting. Up to one-third of the shares of restricted stock may vest on each of November 30, 2014, 2015 and 2016, subject to the employee's continued employment on those dates. (4) Restricted common stock issued to members of the company's non-employee directors. These awards of restricted stock will vest subject to the director's continued service on the Board of Directors on the earlier of (i) the one year anniversary of the date of grant or (ii) the date of the next annual meeting of our stockholders, if such non-employee director continues his or her service on the Board of Directors until the next annual meeting of stockholders, but not thereafter, pursuant to our independent director compensation policy. (5) Restricted common stock issued to certain of the company's senior management and other employees, which are subject to pre-defined market specific performance criteria based vesting. Up to one-third of the shares of restricted stock may vest on each of November 30, 2015, 2016 and 2017, subject to the employee's continued employment on those dates. (6) Restricted common stock issued to certain of the company's senior management and other employees, which are subject to pre-defined market specific performance criteria based vesting. Up to one-third of the shares of restricted stock may vest on each of November 30, 2016, 2017 and 2018, subject to the employee's continued employment on those dates. For the performance-based stock awards, the fair value of the awards was estimated using a Monte Carlo Simulation model. Our stock price, along with the stock prices of the group of peer REITs, is assumed to follow the Multivariate Geometric Brownian Motion Process. Multivariate Geometric Brownian Motion is a common assumption when modeling in financial markets, as it allows the modeled quantity (in this case, the stock price) to vary randomly from its current value and take any value greater than zero. The volatilities of the returns on the stock price of the company and the group REITs were estimated based on a three year look-back period. The expected growth rate of the stock prices over the “derived service period” of the employee is determined with consideration of the risk free rate as of the grant date. For the restricted stock grants that are time-vesting, we estimate the stock compensation expense based on the fair value of the stock at the grant date. The following table summarizes the activity of non-vested restricted stock awards during the year ended December 31, 2015 : 2015 Units Weighted Average Grant Date Fair Value Balance at beginning of year 493,539 $ 22.01 Granted 98,354 22.11 Vested (376,462 ) 18.51 Forfeited (40,687 ) 32.78 Balance at end of year 174,744 $ 27.11 We recognize noncash compensation expense ratably over the vesting period, and accordingly, we recognized $2.9 million , $3.7 million and $2.8 million in noncash compensation expense for the years ended December 31, 2015 , 2014 and 2013 , each of which is included in general and administrative expense on the statement of income. Unrecognized compensation expense was $2.8 million at December 31, 2015 , which will be recognized over a weighted-average period of 1.6 years. Earnings Per Share We have calculated earnings per share (“EPS”) under the two-class method. The two-class method is an earnings allocation methodology whereby EPS for each class of common stock and participating security is calculated according to dividends declared and participation rights in undistributed earnings. For the years ended December 31, 2015 , 2014 and 2013 , we had a weighted average of approximately 184,545 shares , 430,584 shares and 630,130 unvested shares outstanding, respectively, which are considered participating securities. Therefore, we have allocated our earnings for basic and diluted EPS between common shares and unvested shares. Diluted EPS is calculated by dividing the net income attributable to common stockholders for the period by the weighted average number of common and dilutive instruments outstanding during the period using the treasury stock method. For the year ended December 31, 2015 , diluted shares exclude incentive restricted stock as these awards are considered contingently issuable. Additionally, the unvested restricted stock awards subject to time vesting are anti-dilutive for all periods presented and accordingly, have been excluded from the weighted average common shares used to compute diluted EPS. Earnings Per Unit of the Operating Partnership Basic earnings (loss) per unit (“EPU”) of the Operating Partnership is computed by dividing income (loss) applicable to unitholders by the weighted average Operating Partnership units outstanding, as adjusted for the effect of participating securities. Operating Partnership units granted in equity-based payment transactions are considered participating securities prior to vesting. The impact of unvested Operating Partnership unit awards on EPU has been calculated using the two-class method whereby earnings are allocated to the unvested Operating Partnership unit awards based on distributions and the unvested Operating Partnership units’ participation rights in undistributed earnings (losses). The calculation of diluted earnings per unit for the year ended December 31, 2015 , 2014 , and 2013 does not include 184,545 units, 430,584 units, and 630,130 unvested weighted average Operating Partnership units, respectively, as these equity securities are either considered contingently issuable or the effect of including these equity securities was anti-dilutive. The computation of basic and diluted EPS is presented below (dollars in thousands, except share and per share amounts): Year Ended December 31, 2015 2014 2013 NUMERATOR Income from operations $ 53,915 $ 31,145 $ 22,594 Less: Net income attributable to restricted shares (168 ) (374 ) (536 ) Less: Income from operations attributable to unitholders in the Operating Partnership (15,238 ) (9,015 ) (6,838 ) Net income attributable to common stockholders—basic $ 38,509 $ 21,756 $ 15,220 Income from operations attributable to American Assets Trust, Inc. common stockholders—basic $ 38,509 $ 21,756 $ 15,220 Plus: Income from operations attributable to unitholders in the Operating Partnership 15,238 9,015 6,838 Net income attributable to common stockholders—diluted $ 53,747 $ 30,771 $ 22,058 DENOMINATOR Weighted average common shares outstanding—basic 44,439,112 42,041,126 39,539,457 Effect of dilutive securities—conversion of Operating Partnership units 17,900,051 17,906,348 17,976,353 Weighted average common shares outstanding—diluted 62,339,163 59,947,474 57,515,810 Earnings per common share, basic $ 0.87 $ 0.52 $ 0.38 Earnings per common share, diluted $ 0.86 $ 0.51 $ 0.38

Income Taxes (Notes)

Income Taxes (Notes)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES We elected to be taxed as a REIT and operate in a manner that allows us to qualify as a REIT, for federal income tax purposes commencing with our taxable year ending December 31, 2011. As a REIT, we are generally not subject to corporate level income tax on the earnings distributed currently to our stockholders that we derive from our REIT qualifying activities. Taxable income from non-REIT activities managed through our TRS is subject to federal and state income taxes. We lease our hotel property to a wholly owned TRS that is subject to federal and state income taxes. We account for income taxes using the asset and liability method, under which deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between GAAP carrying amounts and their respective tax bases. Additionally, we classify certain state taxes as income taxes for financial reporting purposes in accordance with ASC Topic 740, Income Taxes. A deferred tax liability is included in our consolidated balance sheets of $0.2 million as of December 31, 2015 and 2014 , in relation to real estate asset basis differences and prepaid expenses for our TRS. The income tax provision included in other income (expense) on the consolidated statement of income is as follows (in thousands): Year Ended December 31, 2015 Year Ended December 31, 2014 Year Ended December 31, 2013 Current: Federal $ 305 $ 190 $ 370 State 35 284 362 Deferred: Federal $ — $ — $ (47 ) State (45 ) (14 ) (40 ) Provision for income taxes $ 295 $ 460 $ 645

Commitments and Contingencies (

Commitments and Contingencies (Notes)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Legal We are sometimes involved in various disputes, lawsuits, warranty claims, environmental and other matters arising in the ordinary course of business. Management makes assumptions and estimates concerning the likelihood and amount of any potential loss relating to these matters. We are currently a party to various legal proceedings. We accrue a liability for litigation if an unfavorable outcome is probable and the amount of loss can be reasonably estimated. If an unfavorable outcome is probable and a reasonable estimate of the loss is a range, we accrue the best estimate within the range; however, if no amount within the range is a better estimate than any other amount, the minimum within the range is accrued. Legal fees related to litigation are expensed as incurred. We do not believe that the ultimate outcome of these matters, either individually or in the aggregate, could have a material adverse effect on our financial position or overall trends in results of operations; however, litigation is subject to inherent uncertainties. Also, under our leases, tenants are typically obligated to indemnify us from and against all liabilities, costs and expenses imposed upon or asserted against us as owner of the properties due to certain matters relating to the operation of the properties by the tenant. Commitments At The Landmark at One Market, we lease, as lessee, a building adjacent to The Landmark under an operating lease effective through June 30, 2021, which we have the option to extend until 2031 by way of two five -year extension options. At Waikiki Beach Walk, we sublease a portion of the building of which Quiksilver is currently in possession, under an operating lease effective through December 31, 2021, which we have the option to extend at fair rental value in the event the sublessor extends its lease for the space with the master landlord. The lease payments under the lease will increase by approximately 3.4% annually through 2017 and, thereafter, will be equal to fair rental value, as defined in the lease, through lease expiration. Current minimum annual payments under the leases are as follows, as of December 31, 2015 (in thousands): 2016 $ 2,096 2017 3,097 (1) 2018 3,167 2019 3,240 2020 3,315 Thereafter 28,176 (2) Total $ 43,091 (1) Lease payments on the Waikiki Beach Walk lease will be equal to fair rental value from March 2017 through the end of the lease term. In the table, we have shown the lease payments for this period based on the stated rate for the month of February 2017 of $61,690 . (2) Lease payments on The Landmark at One Market lease will be equal to fair rental value from July 2021 through the end of the options lease term. In the table, we have shown the option lease payments for this period based on the stated rate for the month of June 2021 of $217,744 . We have management agreements with Outrigger Hotels & Resorts or an affiliate thereof (“Outrigger”) pursuant to which Outrigger manages each of the retail and hotel portions of the Waikiki Beach Walk property. Under the management agreement with Outrigger relating to the retail portion of Waikiki Beach Walk (the “retail management agreement”), we pay Outrigger a monthly management fee of 3.0% of net revenues from the retail portion of Waikiki Beach Walk. Pursuant to the terms of the retail management agreement, if the agreement is terminated in certain instances, including our election not to repair damage or destruction at the property, a condemnation or our failure to make required working capital infusions, we would be obligated to pay Outrigger a termination fee equal to the sum of the management fees paid for the two calendar months immediately preceding the termination date. The retail management agreement may not be terminated by us or by Outrigger without cause. Under our management agreement with Outrigger relating to the hotel portion of Waikiki Beach Walk (the “hotel management agreement”), we pay Outrigger a monthly management fee of 6.0% of the hotel's gross operating profit, as well as 3.0% of the hotel's gross revenues; provided that the aggregate management fee payable to Outrigger for any year shall not exceed 3.5% of the hotel's gross revenues for such fiscal year. Pursuant to the terms of the hotel management agreement, if the agreement is terminated in certain instances, including upon a transfer by us of the hotel or upon a default by us under the hotel management agreement, we would be required to pay a cancellation fee calculated by multiplying (1) the management fees for the previous 12 months by (2) (a) eight , if the agreement is terminated in the first 11 years of its term, or (b) four , three , two or one , if the agreement is terminated in the twelfth, thirteenth, fourteenth or fifteenth year, respectively, of its term. The hotel management agreement may not be terminated by us or by Outrigger without cause. A wholly owned subsidiary of our Operating Partnership, WBW Hotel Lessee LLC, entered into a franchise license agreement with Embassy Suites Franchise LLC, the franchisor of the brand “Embassy Suites™,” to obtain the non-exclusive right to operate the hotel under the Embassy Suites brand for 20 years. The franchise license agreement provides that WBW Hotel Lessee LLC must comply with certain management, operational, record keeping, accounting, reporting and marketing standards and procedures. In connection with this agreement, we are also subject to the terms of a product improvement plan pursuant to which we expect to undertake certain actions to ensure that our hotel's infrastructure is maintained in compliance with the franchisor's brand standards. In addition, we must pay to Embassy Suites Franchise LLC a monthly franchise royalty fee equal to 4.0% of the hotel's gross room revenue through December 2021 and 5.0% of the hotel's gross room revenue thereafter, as well as a monthly program fee equal to 4.0% of the hotel's gross room revenue. If the franchise license is terminated due to our failure to make required improvements or to otherwise comply with its terms, we may be liable to the franchisor for a termination payment, which could be as high as $6.8 million based on operating performance through December 31, 2015 . Our Del Monte Center property has ongoing environmental remediation related to ground water contamination. The environmental issue existed at purchase and is currently in the final stages of remediation. The final stages of the remediation will include routine, long term ground monitoring by the appropriate regulatory agency over the next five to seven years. The work performed is financed through an escrow account funded by the seller upon our purchase of the Del Monte Center. We believe the funds in the escrow account are sufficient for the remaining work to be performed. However, if further work is required costing more than the remaining escrow funds, we could be required to pay such overage, although we may have a contractual claim for such costs against the prior owner or our environmental remediation consultant. In connection with the Offering, we entered into tax protection agreements with certain limited partners of our Operating Partnership. These agreements provide that if we dispose of any interest with respect to Carmel Country Plaza, Carmel Mountain Plaza, Del Monte Center, Loma Palisades, Lomas Santa Fe Plaza, Waikele Center or the ICW Plaza portion of Torrey Reserve Campus, in a taxable transaction during the period from the closing of the Offering through January 19, 2018, we will indemnify such limited partners for their tax liabilities attributable to their share of the built-in gain that existed with respect to such property interest as of the time of the Offering and tax liabilities incurred as a result of the reimbursement payment. Subject to certain exceptions and limitations, the indemnification rights will terminate for any such protected partner that sells, exchanges or otherwise disposes of more than 50% of his or her common units. We have no present intention to sell or otherwise dispose of the properties or interest therein in taxable transactions during the restriction period. If we were to trigger the tax protection provisions under these agreements, we would be required to pay damages in the amount of the taxes owed by these limited partners (plus additional damages in the amount of the taxes incurred as a result of such payment). As of December 31, 2015 , the company accrued approximately $6.6 million for transfer taxes in connection with its Offering. The company believes that it has filed all necessary forms with the requisite taxing authorities. Concentrations of Credit Risk Our properties are located in Southern California, Northern California, Hawaii, Oregon, Texas and Washington. The ability of the tenants to honor the terms of their respective leases is dependent upon the economic, regulatory and social factors affecting the markets in which the tenants operate. Eleven of our consolidated properties, representing 28.7% of our total revenue for the year ended December 31, 2015 , are located in Southern California, which exposes us to greater economic risks than if we owned a more geographically diverse portfolio. Our mixed-use property located in Honolulu, Hawaii accounted for 21.7% of total revenues for the year ended December 31, 2015 . Tenants in the retail industry accounted for 35.8% and 37.0% of total revenues for the years December 31, 2015 and 2014 , respectively. This makes us susceptible to demand for retail rental space and subject to the risks associated with an investment in real estate with a concentration of tenants in the retail industry. Two retail properties, Alamo Quarry Market and Waikele Center, accounted for 15.0% and 15.6% of total revenues for the years ended December 31, 2015 and 2014 , respectively. Tenants in the office industry accounted for 35.4% and 35.6% of total revenues for the years December 31, 2015 and 2014 , respectively. This makes us susceptible to demand for office rental space and subject to the risks associated with an investment in real estate with a concentration of tenants in the office industry. For the years ended December 31, 2015 and 2014 , no tenant accounted for more than 10.0% of our total rental revenue. At December 31, 2015 , salesforce.com, inc. at The Landmark at One Market accounted for 7.9% of total annualized base rent. Three other tenants ( Autodesk, Inc. , Kmart , and Lowe's ) comprise 8.7% of our total annualized base rent at December 31, 2015 , in the aggregate. No other tenants represent greater than 2.0% of our total annualized base rent. Total annualized base rent used for the percentage calculations includes the annualized base rent as of December 31, 2015 for our office properties, retail properties and the retail portion of our mixed-use property.

Operating Leases (Notes)

Operating Leases (Notes)	12 Months Ended
	Dec. 31, 2015
Leases, Operating [Abstract]
OPERATING LEASES	OPERATING LEASES At December 31, 2015 , our retail, office and mixed-use properties are located in five states: California, Oregon, Hawaii, Washington and Texas. At December 31, 2015 , we had approximately 804 leases with office and retail tenants, including the retail portion of our mixed-use property. Our multifamily properties are located in Southern California, and we had approximately 1,038 leases with residential tenants at December 31, 2015 , excluding Santa Fe Park RV Resort. Our leases with office, retail, mixed-use and residential tenants are classified as operating leases. Leases at our office and retail properties and the retail portion of our mixed-use property generally range from three to ten years (certain leases with anchor tenants may be longer), and in addition to minimum rents, usually provide for cost recoveries for the tenant's share of certain operating costs and also may include percentage rents based on the tenant's level of sales achieved. Leases on apartments generally range from seven to fifteen months, with a majority having 12 month lease terms. Rooms at the hotel portion of our mixed-use property are rented on a nightly basis. As of December 31, 2015 , minimum future rentals from noncancelable operating leases before any reserve for uncollectible amounts and assuming no early lease terminations, at our office and retail properties and the retail portion of our mixed-use property are as follows for the years ended December 31 (in thousands): 2016 $ 167,417 2017 156,368 2018 123,262 2019 87,738 2020 65,087 Thereafter 181,245 Total $ 781,117 The above future minimum rentals exclude residential leases, which are typically range from seven to fifteen months, and exclude the hotel, as rooms are rented on a nightly basis.

Component of Rental Income and

Component of Rental Income and Expense (Notes)	12 Months Ended
	Dec. 31, 2015
Operating Leases, Income Statement, Lease Revenue [Abstract]
COMPONENTS OF RENTAL INCOME AND EXPENSE	COMPONENTS OF RENTAL INCOME AND EXPENSE The principal components of rental income are as follows (in thousands): Year Ended December 31, 2015 2014 2013 Minimum rents Retail $ 72,999 $ 70,573 $ 69,374 Office 87,125 82,018 81,845 Multifamily 18,137 15,732 14,926 Mixed-Use 10,313 10,004 9,549 Cost reimbursement 30,796 29,052 27,583 Percentage rent 2,834 3,107 2,655 Hotel revenue 38,191 33,911 35,137 Other 1,492 1,681 1,688 Total rental income $ 261,887 $ 246,078 $ 242,757 Minimum rents include $2.7 million , $1.9 million and $2.6 million for the years ended December 31, 2015 , 2014 and 2013 , respectively, to recognize minimum rents on a straight-line basis. In addition, minimum rents include $2.9 million , $2.8 million and $2.4 million for the years ended December 31, 2015 , 2014 and 2013 , respectively, to recognize the amortization of above and below market leases. The principal components of rental expenses are as follows (in thousands): Year Ended December 31, 2015 2014 2013 Rental operating $ 27,611 $ 26,371 $ 26,028 Hotel operating 23,112 21,488 22,115 Repairs and maintenance 11,503 10,600 10,514 Marketing 2,104 1,623 1,547 Rent 2,511 2,452 2,442 Hawaii excise tax 4,408 3,981 4,153 Management fees 1,938 1,752 1,809 Total rental expenses $ 73,187 $ 68,267 $ 68,608

Other Income (Expenses) (Notes)

Other Income (Expenses) (Notes)	12 Months Ended
	Dec. 31, 2015
Other Income and Expenses [Abstract]
OTHER INCOME (EXPENSE)	OTHER INCOME (EXPENSE) The principal components of other income (expense), net are as follows (in thousands): Year Ended December 31, 2015 2014 2013 Interest and investment income $ 90 $ 155 $ 148 Income tax expense (295 ) (460 ) (645 ) Other non-operating income 108 746 10 Total other income (expense) $ (97 ) $ 441 $ (487 )

Related Party Transactions (Not

Related Party Transactions (Notes)	12 Months Ended
	Dec. 31, 2015
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS At Torrey Reserve Campus, we lease space to ICW, an entity owned and controlled by Ernest Rady. Rental revenue recognized on the leases of $2.2 million , $2.2 million and $2.2 million for the years ended December 31, 2015 , 2014 and 2013 , respectively, is included in rental income. Additionally, on July 1, 2014, we entered into a workers' compensation insurance policy with ICW. The policy premium is approximately $0.4 million for the period July 1, 2014 through July 1, 2015. We renewed this policy with ICW on July 1, 2015 and the premium is approximately $0.2 million for the period July 1, 2015 through July 1, 2016. On occasion, the company utilizes aircraft services provided by AAI Aviation, Inc. ("AAIA"), an entity owned and controlled by Ernest Rady. For the years ending December 31, 2015 , 2014 and 2013 , we incurred approximately $0.2 million , $0.1 million and $0.1 million , respectively, of expenses related to aircraft services of AAIA or reimbursement to Mr. Rady (or his trust) for use of the aircraft owned by AAIA. These expenses are recorded as general and administrative expenses in our consolidated statements of comprehensive income. On March 9, 2015, we entered into a common stock Purchase Agreement with EIC, an entity owned and controlled by Ernest Rady. The Purchase Agreement provided for the sale by us to EIC, in a private placement, of 200,000 shares of common stock at a price of $40.54 per share, resulting in gross proceeds to us of approximately $8.1 million . The price per share paid by EIC was equal to the closing price of a share of our common stock on the New York Stock Exchange on the date of the Purchase Agreement. On September 12, 2014, the company entered into a common stock Purchase Agreement with ICW. The Purchase Agreement provides for the sale by the company to ICW, in a private placement, of 400,000 shares of common stock at a price of $33.76 per share, resulting in gross proceeds to the company of approximately $13.5 million . See Note 10. As of December 31, 2015 , Mr. Rady and his affiliates owned approximately 10.1% of our outstanding common stock and 23.5% of our outstanding common units, which together represent an approximate 33.6% beneficial interest in our company on a fully diluted basis. The Waikiki Beach Walk entities have a 47.7% investment in WBW CHP LLC, an entity that was formed to, among other things, construct a chilled water plant to provide air conditioning to the property and other adjacent facilities. The operating expenses of WBW CHP LLC are recovered through reimbursements from its members, and reimbursements to WBW CHP LLC of $1.0 million , $1.1 million and $1.1 million were made for the years ended December 31, 2015 , 2014 and 2013 and included in rental expenses on the statements of income.

Segment Reporting (Notes)

Segment Reporting (Notes)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
SEGMENT REPORTING	SEGMENT REPORTING Segment information is prepared on the same basis that our management reviews information for operational decision-making purposes. We review operating and financial information for each property on an individual basis and therefore, each property represents an individual operating segment. However, we have aggregated our properties into reportable segments as the properties share similar long-term economic characteristics and have other similarities including the fact that they are operated using consistent business strategies. We operate in four business segments: the acquisition, redevelopment, ownership and management of retail real estate, office real estate, multifamily real estate and mixed-use real estate. The products for our retail segment primarily include rental of retail space and other tenant services, including tenant reimbursements, parking and storage space rental. The products for our office segment primarily include rental of office space and other tenant services, including tenant reimbursements, parking and storage space rental. The products for our multifamily segment include rental of apartments and other tenant services. The products of our mixed-use segment include rental of retail space and other tenant services, including tenant reimbursements, parking and storage space rental and operation of a 369 -room all-suite hotel. We evaluate the performance of our segments based on segment profit which is defined as property revenue less property expenses. We do not use asset information as a measure to assess performance and make decisions to allocate resources. Therefore, depreciation and amortization expense is not allocated among segments. General and administrative expenses, interest expense, depreciation and amortization expense and other income and expense are not included in segment profit as our internal reporting addresses these items on a corporate level. Segment profit is not a measure of operating income or cash flows from operating activities as measured by GAAP, and it is not indicative of cash available to fund cash needs and should not be considered an alternative to cash flows as a measure of liquidity. Not all companies calculate segment profit in the same manner. We consider segment profit to be an appropriate supplemental measure to net income because it assists both investors and management in understanding the core operations of our properties. The following table represents operating activity within our reportable segments (in thousands): Year Ended December 31, 2015 2014 2013 Total Retail Property revenue $ 98,795 $ 96,140 $ 93,449 Property expense (25,672 ) (25,451 ) (23,900 ) Segment profit 73,123 70,689 69,549 Total Office Property revenue 97,651 92,474 90,527 Property expense (28,843 ) (27,003 ) (26,688 ) Segment profit 68,808 65,471 63,839 Total Multifamily Property revenue 19,455 16,976 16,125 Property expense (8,334 ) (6,099 ) (5,917 ) Segment profit 11,121 10,877 10,208 Total Mixed-Use Property revenue 59,722 54,410 54,956 Property expense (35,157 ) (32,678 ) (33,481 ) Segment profit 24,565 21,732 21,475 Total segments’ profit $ 177,617 $ 168,769 $ 165,071 The following table is a reconciliation of segment profit to net income attributable to stockholders (in thousands): Year Ended December 31, 2015 2014 2013 Total segments' profit $ 177,617 $ 168,769 $ 165,071 General and administrative (20,074 ) (18,532 ) (17,195 ) Depreciation and amortization (63,392 ) (66,568 ) (66,775 ) Interest expense (47,260 ) (52,965 ) (58,020 ) Gain on sale of real estate 7,121 — — Other income (expense), net (97 ) 441 (487 ) Net income 53,915 31,145 22,594 Net income attributable to restricted shares (168 ) (374 ) (536 ) Net income attributable to unitholders in the Operating Partnership (15,238 ) (9,015 ) (6,838 ) Net income attributable to American Assets Trust, Inc. stockholders $ 38,509 $ 21,756 $ 15,220 The following table shows net real estate and secured note payable balances for each of the segments, along with their capital expenditures for each year (in thousands): December 31, 2015 December 31, 2014 Net real estate Retail $ 638,893 $ 639,456 Office 796,773 757,854 Multifamily 208,730 182,468 Mixed-Use 190,466 195,622 $ 1,834,862 $ 1,775,400 Secured Notes Payable (1) Retail $ 60,065 $ 161,975 Office 292,183 426,254 Multifamily 101,444 101,444 Mixed-Use 130,310 130,310 $ 584,002 $ 819,983 Capital Expenditures (2) Retail $ 7,393 $ 8,671 Office 49,049 34,577 Multifamily 81,559 101,392 Mixed-Use 634 5,132 $ 138,635 $ 149,772 (1) Excludes unamortized fair market value adjustment of $4.3 million and $7.2 million as of December 31, 2015 and 2014 , respectively. (2) Capital expenditures represent cash paid for capital expenditures during the year and includes leasing commissions paid.

Quarterly Financial Information

Quarterly Financial Information (Unaudited) (Notes)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)	QUARTERLY FINANCIAL INFORMATION (UNAUDITED) The tables below reflect selected American Assets Trust, Inc. quarterly information for 2015 and 2014 (in thousands, except per shares data): Three Months Ended December 31, 2015 September 30, 2015 June 30, 2015 March 31, 2015 Total revenue $ 71,530 $ 71,289 $ 66,769 $ 66,035 Operating income 23,893 23,510 23,504 23,244 Net income 11,226 19,026 12,284 11,379 Net income attributable to restricted shares (53 ) (32 ) (40 ) (43 ) Net income attributable to unitholders in the Operating Partnership (2,961 ) (5,432 ) (3,536 ) (3,309 ) Net income attributable to American Assets Trust, Inc. stockholders $ 8,212 $ 13,562 $ 8,708 $ 8,027 Net income per share attributable to common stockholders - basic and diluted $ 0.18 $ 0.30 $ 0.20 $ 0.18 Three Months Ended December 31, September 30, June 30, March 31, Total revenue $ 66,478 $ 67,343 $ 62,199 $ 63,980 Operating income 22,526 23,036 17,726 20,381 Net income 10,046 9,090 5,351 6,658 Net income attributable to restricted shares (115 ) (95 ) (94 ) (70 ) Net income attributable to unitholders in the Operating Partnership (2,907 ) (2,578 ) (1,544 ) (1,986 ) Net income attributable to American Assets Trust, Inc. stockholders $ 7,024 $ 6,417 $ 3,713 $ 4,602 Net income per share attributable to common stockholders - basic and diluted $ 0.16 $ 0.15 $ 0.09 $ 0.11 The tables below reflect selected American Assets Trust, L.P. quarterly information for 2015 and 2014 (in thousands, except per shares data): Three Months Ended December 31, 2015 September 30, 2015 June 30, 2015 March 31, 2015 Total revenue $ 71,530 $ 71,289 $ 66,769 $ 66,035 Operating income 23,893 23,510 23,504 23,244 Net income 11,226 19,026 12,284 11,379 Net income attributable to restricted shares (53 ) (32 ) (40 ) (43 ) Net income attributable to American Assets Trust, L.P. unit holders $ 11,173 $ 18,994 $ 12,244 $ 11,336 Net income per unit attributable to unit holders - basic and diluted $ 0.18 $ 0.3 $ 0.2 $ 0.18 Three Months Ended December 31, 2014 September 30, 2014 June 30, 2014 March 31, 2014 Total revenue $ 66,478 $ 67,343 $ 62,199 $ 63,980 Operating income 22,526 23,036 17,726 20,381 Net income 10,046 9,090 5,351 6,658 Net income attributable to restricted shares (115 ) (95 ) (94 ) (70 ) Net income attributable to American Assets Trust, L.P. unit holders $ 9,931 $ 8,995 $ 5,257 $ 6,588 Net income per unit attributable to common unit holders - basic and diluted $ 0.16 $ 0.15 $ 0.09 $ 0.11

Subsequent Events (Notes)

Subsequent Events (Notes)	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS On January 29, 2016, we entered into a forward-starting interest rate swap contract with U.S. Bank National Association to reduce the interest rate variability exposure of the projected interest cash flows of our prospective new seven-year term loan (anticipated to close on March 1, 2016 ). The forward-starting seven -year swap contract had a notional amount of $100 million , a termination date of March 1, 2023 , a fixed pay rate of 1.4485% , a receive rate equal to the one-month LIBOR, with fixed rate payments due monthly commencing April 1, 2016, floating payments due monthly commencing April 1, 2016, and floating reset dates two days prior to the first day of each calculation period. The forward-starting seven -year swap contract accrual period, March 1, 2016 to March 1, 2023, was designed to match the expected tenor of our prospective new seven -year term loan (anticipated to close on March 1, 2016). The forward-starting interest rate swap contract was deemed to be a highly effective cash flow hedge and we elected to designate the forward-starting swap contract as an accounting hedge.

SCHEDULE III-Consolidated Real

SCHEDULE III-Consolidated Real Estate and Accumulated Depreciation (Notes)	9 Months Ended
	Sep. 30, 2015
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
SCHEDULE III-Consolidated Real Estate and Accumulated Depreciation	Encumbrance as of December 31, 2015 Initial Cost Cost Capitalized Subsequent to Acquisition Gross Carrying Amount at December 31, 2015 Accumulated Depreciation and Amortization Year Built/ Renovated Date Acquired Life on which depreciation in latest income statements is computed Description Land Building and Improvements Land Building and Improvements Alamo Quarry Market $ — $ 26,396 $ 109,294 $ 13,181 $ 26,816 $ 122,055 $ (45,920 ) 1997/1999 12/9/2003 35 years Carmel Country Plaza — 4,200 — 11,759 4,200 11,759 (7,210 ) 1991 1/10/1989 35 years Carmel Mountain Plaza — 22,477 65,217 26,896 31,035 83,555 (31,794 ) 1994/2014 3/28/2003 35 years Del Monte Center — 27,412 87,570 22,949 27,117 110,814 (49,887 ) 1967/1984/2006 4/8/2004 35 years Geary Marketplace — 8,239 12,353 165 8,238 12,519 (1,222 ) 2012 12/19/2012 35 years Lomas Santa Fe Plaza — 8,600 11,282 11,873 8,620 23,135 (13,874 ) 1972/1997 6/12/1995 35 years The Shops at Kalakaua — 13,993 10,817 100 14,006 10,904 (3,576 ) 1971/2006 3/31/2005 35 years Solana Beach Towne Centre 37,065 40,980 38,842 2,175 40,980 41,017 (6,652 ) 1973/2000/2004 1/19/2011 35 years South Bay Marketplace 23,000 4,401 — 10,774 4,401 10,774 (6,396 ) 1997 9/16/1995 35 years Waikele Center — 55,593 126,858 59,449 70,643 171,257 (56,553 ) 1993/2008 9/16/2004 35 years City Center Bellevue 111,000 25,135 190,998 16,889 25,135 207,887 (22,444 ) 1987 8/21/2012 40 years First & Main 84,500 14,697 109,739 5,704 14,697 115,443 (17,262 ) 2010 3/11/2011 40 years The Landmark at One Market — 34,575 141,196 7,817 34,575 149,013 (25,437 ) 1917/2000 6/30/2010 40 years Lloyd District Portfolio — 18,660 61,401 62,580 12,461 130,180 (12,360 ) 1940-2011/present 7/1/2011 40 years One Beach Street 21,900 15,332 18,017 2,349 15,332 20,366 (2,666 ) 1924/1972/1987/1992 1/24/2012 40 years Solana Beach Corporate Centre: Solana Beach Corporate Centre I-II 11,119 7,111 17,100 3,616 7,111 20,716 (3,235 ) 1982/2005 1/19/2011 40 years Solana Beach Corporate Centre III-IV 35,920 7,298 27,887 1,896 7,298 29,783 (4,763 ) 1982/2005 1/19/2011 40 years Solana Beach Corporate Centre Land — 487 — 60 547 — — N/A 1/19/2011 N/A Torrey Reserve: ICW Plaza — 4,095 — 41,128 5,408 39,815 (11,998 ) 1996-1997/2014 6/6/1989 40 years Pacific North Court 20,749 3,263 — 21,217 4,309 20,171 (9,592 ) 1997-1998 6/6/1989 40 years Pacific South Court — 3,285 — 32,054 4,226 31,113 (10,927 ) 1996-1997 6/6/1989 40 years Pacific VC 6,995 1,413 — 8,251 2,148 7,516 (4,252 ) 1998/2000 6/6/1989 40 years Pacific Torrey Daycare — 715 — 1,685 911 1,489 (801 ) 1996-1997 6/6/1989 40 years Torrey Reserve Building 6 — — — 7,945 682 7,263 (588 ) 2013 6/6/1989 40 years Torrey Reserve Building 5 — — — 3,468 1,017 2,451 (31 ) 2015 6/6/1989 40 years Torrey Reserve Land — 229 — 11,266 2,188 9,307 — 2014-present 6/6/1989 N/A Imperial Beach Gardens 20,000 1,281 4,820 4,400 1,281 9,220 (7,793 ) 1959/2008 7/31/1985 30 years Loma Palisades 73,744 14,000 16,570 18,539 14,051 35,058 (24,954 ) 1958/2001-2008 7/20/1990 30 years Mariner’s Point 7,700 2,744 4,540 1,234 2,744 5,774 (2,712 ) 1986 5/9/2001 30 years Santa Fe Park RV Resort — 401 928 824 401 1,752 (1,430 ) 1971/2007-2008 6/1/1979 30 years Hassalo on Eighth - Residential — — — 177,074 6,220 170,854 (1,738 ) 2015 7/1/2011 30 years Waikiki Beach Walk: Retail 130,310 45,995 74,943 209 45,995 75,152 (11,690 ) 2006 1/19/2011 35 years Hotel — 30,640 60,029 595 30,640 60,624 (10,256 ) 2008/2014 1/19/2011 35 years Solana Beach - Highway 101 Land — 7,847 202 867 8,916 — (189 ) N/A 9/20/2011 N/A Torrey Point — 2,073 741 10,129 6,145 6,798 (964 ) N/A 5/9/1997 N/A $ 584,002 $ 453,567 $ 1,191,344 $ 601,117 $ 490,494 $ 1,755,534 $ (411,166 ) (1) For Federal tax purposes, the aggregate tax basis is approximately $1.6 billion as of December 31, 2015 . Year Ended December 31, 2015 2014 2013 Real estate assets Balance, beginning of period $ 2,136,824 1,995,417 1,938,676 Additions: Improvements 119,719 154,594 60,677 Deductions: Cost of Real Estate Sold (7,396 ) — — Other (1) (3,119 ) (13,187 ) (3,936 ) Balance, end of period $ 2,246,028 $ 2,136,824 $ 1,995,417 Accumulated depreciation Balance, beginning of period $ 361,424 $ 318,581 $ 270,494 Additions—depreciation 54,534 55,159 51,949 Deductions: Cost of Real Estate Sold (2,334 ) — — Other (1) (2,458 ) (12,316 ) (3,862 ) Balance, end of period $ 411,166 $ 361,424 $ 318,581 (1) Other deductions for the years ended December 31, 2015 , 2014 and 2013 represent the write-off of fully depreciated assets.

Summary of Significant Accoun27

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Business and Organization	Business and Organization American Assets Trust, Inc. (which may be referred to in these financial statements as the “company,” “we,” “us,” or “our”) is a Maryland corporation formed on July 16, 2010 that did not have any operating activity until the consummation of our initial public offering (the “Offering”) and the related acquisition on January 19, 2011 of certain assets of a combination of entities whose assets included entities owned and/or controlled by Ernest S. Rady and his affiliates, including the Rady Trust, which in turn owned (1) controlling interests in entities owning 17 properties and the property management business of American Assets, Inc. and (2) noncontrolling interests in entities owning four properties. The company is the sole general partner of American Assets Trust, L.P., a Maryland limited partnership formed on July 16, 2010 (the “Operating Partnership”). The company's operations are carried on through our Operating Partnership and its subsidiaries, including our taxable REIT subsidiary. Since the formation of our Operating Partnership, the company has controlled our Operating Partnership as its general partner and has consolidated its assets, liabilities and results of operations. We are a vertically integrated and self-administered REIT with 131 employees providing substantial in-house expertise in asset management, property management, property development, leasing, tenant improvement construction, acquisitions, repositioning, redevelopment and financing. Any reference to the number of properties or units and square footage or acres; or references to beneficial ownership interests, are unaudited and outside the scope of our independent registered public accounting firm's audit of our financial statements in accordance with the standards of the United States Public Company Accounting Oversight Board. As of December 31, 2015 , we owned or had a controlling interest in 23 office, retail, multifamily and mixed-use operating properties, the operations of which we consolidate. Additionally, as of December 31, 2015 , we owned land at five of our properties that we classify as held for development and construction in progress. A summary of the properties owned by us is as follows: Retail Carmel Country Plaza Del Monte Center Carmel Mountain Plaza Geary Marketplace South Bay Marketplace The Shops at Kalakaua Lomas Santa Fe Plaza Waikele Center Solana Beach Towne Centre Alamo Quarry Market Office Torrey Reserve Campus Lloyd District Portfolio Solana Beach Corporate Centre City Center Bellevue The Landmark at One Market One Beach Street First & Main Multifamily Loma Palisades Imperial Beach Gardens Mariner's Point Santa Fe Park RV Resort Hassalo on Eighth Mixed-Use Waikiki Beach Walk Retail and Embassy Suites™ Hotel Held for Development and Construction in Progress Solana Beach Corporate Centre – Land Solana Beach – Highway 101 – Land Torrey Point (formerly Sorrento Pointe) – Construction in Progress Torrey Reserve – Construction in Progress Lloyd District Portfolio – Construction in Progress
Basis of Presentation	Basis of Presentation Our consolidated financial statements include the accounts of the company, our Operating Partnership and our subsidiaries. The equity interests of other investors in our Operating Partnership are reflected as noncontrolling interests. All significant intercompany transactions and balances are eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, referred to as “GAAP,” requires management to make estimates and assumptions that in certain circumstances affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities, and revenues and expenses. These estimates are prepared using management's best judgment, after considering past, current and expected events and economic conditions. Actual results could differ from these estimates.
Consolidated Statements of Cash Flows-Supplemental Disclosures	Consolidated Statements of Cash Flows-Supplemental Disclosures The following table provides supplemental disclosures related to the Consolidated Statements of Cash Flows (in thousands): Year Ended December 31, 2015 2014 2013 Supplemental cash flow information Total interest costs incurred $ 54,829 $ 58,455 $ 60,133 Interest capitalized $ 7,569 $ 5,490 $ 2,113 Interest expense $ 47,260 $ 52,965 $ 58,020 Cash paid for interest, net of amounts capitalized $ 42,691 $ 48,032 $ 54,345 Cash paid for income taxes $ 633 $ 404 $ 901 Supplemental schedule of noncash investing and financing activities Accounts payable and accrued liabilities for construction in progress $ (14,733 ) $ 9,908 $ 5,001 Accrued leasing commissions $ (901 ) $ 763 $ 1,385 Accrued placement fees for senior guaranteed notes payable $ — $ 750 $ — Reduction to capital for prepaid equity financing costs $ 54 $ 40 $ 437
Revenue Recognition and Accounts Receivable	Revenue Recognition and Accounts Receivable Our leases with tenants are classified as operating leases. Substantially all such leases contain fixed rent escalations which occur at specified times during the term of the lease. Base rents are recognized on a straight-line basis from when the tenant controls the space through the term of the related lease, net of valuation adjustments, based on management's assessment of credit, collection and other business risks. When we determine that we are the owner of tenant improvements and the tenant has reimbursed us for a portion or all of the tenant improvement costs, we consider the amount paid to be additional rent, which is recognized on a straight-line basis over the term of the related lease. For first generation tenants, in instances in which we fund tenant improvements and the improvements are deemed to be owned by us, revenue recognition will commence when the improvements are substantially completed and possession or control of the space is turned over to the tenant. When we determine that the tenant is the owner of tenant improvements, tenant allowances are recorded as lease incentives and we commence revenue recognition and lease incentive amortization when possession or control of the space is turned over to the tenant for tenant work to begin. Percentage rents, which represent additional rents based upon the level of sales achieved by certain tenants, are recognized at the end of the lease year or earlier if we have determined the required sales level is achieved and the percentage rents are collectible. Real estate tax and other cost reimbursements are recognized on an accrual basis over the periods in which the related expenditures are incurred. Other property income includes parking income, general excise tax billed to tenants and fees charged to tenants at our multifamily properties. Other property income is recognized when earned. We recognize general excise tax gross, with the amounts billed to tenants and customers recorded in other property income and the related taxes paid as rental expense. The general excise tax included in other income was $3.7 million , $3.4 million and $3.5 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. For a tenant to terminate its lease agreement prior to the end of the agreed term, we may require that they pay a fee to cancel the lease agreement. Lease termination fees for which the tenant has relinquished control of the space are generally recognized on the termination date. When a lease is terminated early but the tenant continues to control the space under a modified lease agreement, the lease termination fee is generally recognized evenly over the remaining term of the modified lease agreement. We recognize revenue on the hotel portion of our mixed-use property from the rental of hotel rooms and guest services when the rooms are occupied and services have been provided. Food and beverage sales are recognized when the customer has been served or at the time the transaction occurs. Revenue from room rental is included in rental revenue on the statement of income. Revenue from other sales and services provided is included in other property income on the statement of income. We make estimates of the collectability of our accounts receivable related to minimum rents, straight-line rents, expense reimbursements and other revenue. Accounts receivable and deferred rent receivable are carried net of this allowance for doubtful accounts. We generally do not require collateral or other security from our tenants, other than letters of credit or security deposits. Our determination as to the collectability of accounts receivable and correspondingly, the adequacy of this allowance, is based primarily upon evaluations of individual receivables, current economic conditions, historical experience and other relevant factors. The allowance for doubtful accounts is increased or decreased through bad debt expense. In some cases, primarily relating to straight-line rents, the collection of these amounts extends beyond one year. Our experience relative to unbilled straight-line rents is that a portion of the amounts otherwise recognizable as revenue is never billed to or collected from tenants due to early lease terminations, lease modifications, bankruptcies and other factors. Accordingly, the extended collection period for straight-line rents along with our evaluation of tenant credit risk may result in the nonrecognition of a portion of straight-line rental income until the collection of such income is reasonably assured. If our evaluation of tenant credit risk changes indicating more straight-line revenue is reasonably collectible than previously estimated and realized, the additional straight-line rental income is recognized as revenue. If our evaluation of tenant credit risk changes indicating a portion of realized straight-line rental income is no longer collectible, a reserve and bad debt expense is recorded. At December 31, 2015 and December 31, 2014 , our allowance for doubtful accounts was $0.5 million and $0.8 million , respectively, and our allowance for deferred rent receivables was $1.3 million and $1.2 million , respectively. Total bad debt expense was $0.4 million , $0.2 million and $0.1 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. We recognize gains on sales of properties upon the closing of the transaction with the purchaser. Gains on properties sold are recognized using the full accrual method when (1) the collectability of the sales price is reasonably assured, (2) we are not obligated to perform significant activities after the sale, (3) the initial investment from the buyer is sufficient and (4) other profit recognition criteria have been satisfied. Gains on sales of properties may be deferred in whole or in part until the requirements for gain recognition have been met.
Real Estate	Real Estate Land, buildings and improvements are recorded at cost. Depreciation is computed using the straight-line method. Estimated useful lives range generally from 30 years to a maximum of 40 years on buildings and major improvements. Minor improvements, furniture and equipment are capitalized and depreciated over useful lives ranging from 3 years to 15 years . Maintenance and repairs that do not improve or extend the useful lives of the related assets are charged to operations as incurred. Tenant improvements are capitalized and depreciated over the life of the related lease or their estimated useful life, whichever is shorter. If a tenant vacates its space prior to the contractual termination of its lease, the undepreciated balance of any tenant improvements are written off if they are replaced or have no future value. For the years ended December 31, 2015 , 2014 and 2013 , real estate depreciation expense was $54.2 million , $56.0 million and $52.0 million , respectively. Acquisitions of properties are accounted for in accordance with the authoritative accounting guidance on acquisitions and business combinations. Our methodology of allocating the cost of acquisitions to assets acquired and liabilities assumed is based on estimated fair values, replacement cost and appraised values. When we acquire operating real estate properties, the purchase price is allocated to land and buildings, intangibles such as in-place leases, and to current assets and liabilities acquired, if any. Such valuations include a consideration of the noncancelable terms of the respective leases as well as any applicable renewal periods. The fair values associated with below market renewal options are determined based on a review of several qualitative and quantitative factors on a lease-by-lease basis at acquisition to determine whether it is probable that the tenant would exercise its option to renew the lease agreement. These factors include: (1) the type of tenant in relation to the property it occupies, (2) the quality of the tenant, including the tenant's long term business prospects and (3) whether the fixed rate renewal option was sufficiently lower than the fair rental of the property at the date the option becomes exercisable such that it would appear to be reasonably assured that the tenant would exercise the option to renew. The value allocated to in-place leases is amortized over the related lease term and reflected as depreciation and amortization in the statement of income. The value of above and below market leases associated with the original noncancelable lease terms are amortized to rental income over the terms of the respective noncancelable lease periods and are reflected as either an increase (for below market leases) or a decrease (for above market leases) to rental income in the statement of income. The value of the leases associated with below market lease renewal options that are likely to be exercised are amortized to rental income over the respective renewal periods. If a tenant vacates its space prior to contractual termination of its lease or the lease is not renewed, the unamortized balance of any in-place lease value is written off to rental income and amortization expense. Acquisition-related expenses are expensed in the period incurred.
Capitalized Costs	Capitalized Costs We capitalize certain costs related to the development and redevelopment of real estate including pre-construction costs, real estate taxes, insurance and construction costs and salaries and related costs of personnel directly involved. Additionally, we capitalize interest costs related to development and significant redevelopment activities. Capitalization of these costs begins when the activities and related expenditures commence and cease when the project is substantially complete and ready for its intended use, at which time the project is placed in service and depreciation commences. Additionally, we make estimates as to the probability of certain development and redevelopment projects being completed. If we determine that the completion of development or redevelopment is no longer probable, we expense all capitalized costs which are not recoverable.
Impairment of Long Lived Assets	Impairment of Long Lived Assets We review for impairment on a property by property basis. Impairment is recognized on properties held for use when the expected undiscounted cash flows for a property are less than its carrying amount at which time the property is written-down to fair value. Properties held for sale are recorded at the lower of the carrying amount or the expected sales price less costs to sell.
Financial Instruments	Financial Instruments The estimated fair values of financial instruments are determined using available market information and appropriate valuation methods. Considerable judgment is necessary to interpret market data and develop estimated fair values. The use of different market assumptions or estimation methods may have a material effect on the estimated fair value amounts. Accordingly, estimated fair values are not necessarily indicative of the amounts that could be realized in current market exchanges.
Derivative Instruments	Derivative Instruments At times, we may use derivative instruments to manage exposure to variable interest rate risk. We may enter into interest rate swaps to manage our exposure to variable interest rate risk. If and when we enter into derivative instruments, we ensure that such instruments qualify as cash flow hedges and would not enter into derivative instruments for speculative purposes. Any interest rate swaps associated with our cash flow hedges are recorded at fair value on a recurring basis. We assess effectiveness of our cash flow hedges both at inception and on an ongoing basis. The effective portion of changes in fair value of the interest rate swaps associated with our cash flow hedges is recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into interest expense as interest is incurred on the related variable rate debt. Our cash flow hedges become ineffective if critical terms of the hedging instrument and the debt instrument do not perfectly match such as notional amounts, settlement dates, reset dates, calculation period and LIBOR rate. In addition, we evaluate the default risk of the counterparty by monitoring the credit worthiness of the counterparty. When ineffectiveness exists, the ineffective portion of changes in fair value of the interest rate swaps associated with our cash flow hedges is recognized in earnings in the period affected. We had no hedging instruments outstanding during 2013. Concurrent with the closing of the amended and restated credit facility, we entered into an interest rate swap agreement that is intended to fix the interest rate associated with the term loan at approximately 3.08% through its maturity date and extension options, subject to adjustments based on our consolidated leverage ratio (see Note 8 ).
Cash and Cash Equivalents	Cash and Cash Equivalents We define cash and cash equivalents as cash on hand, demand deposits with financial institutions and short term liquid investments with an initial maturity of less than 3 months . Cash balances in individual banks may exceed the federally insured limit of $250,000 by the Federal Deposit Insurance Corporation (the "FDIC"). No losses have been experienced related to such accounts.
Restricted Cash	Restricted Cash Restricted cash consists of amounts held by lenders to provide for future real estate tax expenditures, insurance expenditures and reserves for capital improvements. Activity for accounts related to real estate tax and insurance expenditures is classified as operating activities in the statement of cash flows. Changes in reserves for capital improvements are classified as investing activities in the statement of cash flows.
Other Assets	Other Assets Other assets consist primarily of lease costs, lease incentives, acquired in-place leases, acquired above market leases and debt issuance costs. Capitalized lease costs are direct costs incurred which were essential to originate a lease and would not have been incurred had the leasing transaction not taken place and include third party commissions related to obtaining a lease. Capitalized lease costs are amortized over the life of the related lease and included in depreciation and amortization expense on the statement of income. If a tenant vacates its space prior to the contractual termination of its lease, the unamortized balance of any lease costs are written off. We view these lease costs as part of the up-front initial investment we made in order to generate a long-term cash inflow. Therefore, we classify cash outflows for lease costs as an investing activity in our consolidated statements of cash flows. Costs related to the issuance of debt instruments are capitalized and are amortized as interest expense over the estimated life of the related issue using the straight-line method which approximates the effective interest method. If a debt instrument is paid off prior to its original maturity date, the unamortized balance of debt issuance costs are written off to interest expense or, if significant, included in “early extinguishment of debt.”
Variable Interest Entities	Variable Interest Entities Certain entities that do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support from other parties or in which equity investors do not have the characteristics of a controlling financial interest qualify as variable interest entities (“VIEs”). VIEs are required to be consolidated by their primary beneficiary. The primary beneficiary of a VIE is the party that has a controlling interest in the VIE. Identifying the party with the controlling interest requires a focus on which entity has the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and (1) the obligation to absorb the expected losses of the VIE or (2) the right to receive the benefits from the VIE.
Stock-Based Compensation	Stock-Based Compensation We grant stock-based compensation awards to our employees and directors typically in the form of restricted shares of common stock, options to purchase common stock and/or shares of common stock. We measure stock-based compensation expense based on the fair value of the award on the grant date and recognize the expense ratably over the vesting period.
Deferred Compensation	Deferred Compensation Our Operating Partnership has adopted the American Assets Trust Executive Deferral Plan V (“EDP V”) and the American Assets Trust Executive Deferral Plan VI (“EDP VI”). These plans were adopted by our Operating Partnership as successor plans to those deferred compensation plans maintained by American Assets Inc. ("AAI") in which certain employees of AAI, who were transferred to us in connection with the Offering (the “Transferred Participants”), participated prior to the Offering. EDP V and EDP VI contain substantially the same terms and conditions as these predecessor plans. AAI transferred to our Operating Partnership the Transferred Participants' account balances under the predecessor plans. These transferred account balances represent amounts deferred by the Transferred Participants prior to the Offering while they were employed by AAI. At the time eligible participants defer compensation, we record compensation cost and a corresponding deferred compensation plan liability, which is included in other liabilities and deferred credits on our consolidated balance sheets. This liability is adjusted to fair value at the end of each accounting period based on the performance of the benchmark funds selected by each participant, and the impact of adjusting the liability to fair value is recorded as an increase or decrease to compensation cost.
Income Taxes	Income Taxes We elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”) commencing with the taxable year ending December 31, 2011. To maintain our qualification as a REIT, we are required to distribute at least 90% of our REIT taxable income to our stockholders and meet the various other requirements imposed by the Code relating to such matters as operating results, asset holdings, distribution levels and diversity of stock ownership. Provided we maintain our qualification for taxation as a REIT, we are generally not subject to corporate level income tax on the earnings distributed currently to our stockholders that we derive from our REIT qualifying activities. If we fail to maintain our qualification as a REIT in any taxable year, and are unable to avail ourselves of certain savings provisions set forth in the Code, all of our taxable income would be subject to federal income tax at regular corporate rates, including any applicable alternative minimum tax. We are subject to certain state and local income taxes. We, together with one of our subsidiaries, have elected to treat such subsidiary as a taxable REIT subsidiary (a “TRS”) for federal income tax purposes. Certain activities that we undertake must be conducted by a TRS, such as non-customary services for our tenants, and holding assets that we cannot hold directly. A TRS is subject to federal and state income taxes.
Segment Information	Segment Information Segment information is prepared on the same basis that our management reviews information for operational decision-making purposes. We operate in four business segments: the acquisition, redevelopment, ownership and management of retail real estate, office real estate, multifamily real estate and mixed-use real estate. The products for our retail segment primarily include rental of retail space and other tenant services, including tenant reimbursements, parking and storage space rental. The products for our office segment primarily include rental of office space and other tenant services, including tenant reimbursements, parking and storage space rental. The products for our multifamily segment include rental of apartments and other tenant services. The products of our mixed-use segment include rental of retail space and other tenant services, including tenant reimbursements, parking and storage space rental and operation of a 369 -room all-suite hotel.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In April 2014, the FASB issued ASU 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. ASU 2014-08 revises the definition of a discontinued operation to a disposal, sale or held-for-sale component or group of components that represents a strategic shift that will have a major effect on an entity's operations and financial results. This pronouncement is effective in 2015, however, calendar year-end companies may early adopt during the first quarter of 2014. We have chosen to early adopt this pronouncement and it became effective for us in the first quarter of 2014. The adoption of this pronouncement resulted in the gain on sale of real estate of $7.1 million for the year ended December 31, 2015 included in continuing operations as opposed to discontinued operations under the previous standard. In May 2014, the FASB issued Update No. 2014-09, Revenue from Contracts with Customers. Update No. 2014-09 establishes that companies may recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This pronouncement is effective for annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period; early adoption is not permitted. We are in the process of evaluating the impact this pronouncement will have on our consolidated financial statements. In February 2015, the FASB issued an ASU that requires reporting entities to evaluate whether they should consolidate certain legal entities. The ASU modifies the evaluation of whether limited partnerships and similar legal entities are VIEs or voting interest entities and eliminates the presumption that a general partner should consolidate a limited partnership. This affects the consolidation analysis of reporting entities that are involved with VIEs, particularly those that have fee arrangements and related party relationships. The ASU is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply the amendments in the ASU using: (i) a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption; or (ii) by applying the amendments retrospectively. We do not expect the adoption of this pronouncement to have a significant impact on our consolidated financial statements. In April 2015, the FASB issued an ASU that requires reporting entities to present debt issuance cost related to a note as a direct deduction from the face amount of that note presented in the balance sheet. The ASU requires the amortization of debt issuance costs presented as interest expense. The ASU is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015, with early adoption permitted. A reporting entity may apply the amendments in the ASU retrospectively to all prior periods. We do not expect the adoption of this pronouncement to have a significant impact on our consolidated financial statements.
Fair Value Measurements	FAIR VALUE OF FINANCIAL INSTRUMENTS A fair value measurement is based on the assumptions that market participants would use in pricing an asset or liability. The hierarchy for inputs used in measuring fair value is as follows: 1. Level 1 Inputs—quoted prices in active markets for identical assets or liabilities 2. Level 2 Inputs—observable inputs other than quoted prices in active markets for identical assets and liabilities 3. Level 3 Inputs—unobservable inputs In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement.

Summary of Significant Accoun28

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Properties Owned	A summary of the properties owned by us is as follows: Retail Carmel Country Plaza Del Monte Center Carmel Mountain Plaza Geary Marketplace South Bay Marketplace The Shops at Kalakaua Lomas Santa Fe Plaza Waikele Center Solana Beach Towne Centre Alamo Quarry Market Office Torrey Reserve Campus Lloyd District Portfolio Solana Beach Corporate Centre City Center Bellevue The Landmark at One Market One Beach Street First & Main Multifamily Loma Palisades Imperial Beach Gardens Mariner's Point Santa Fe Park RV Resort Hassalo on Eighth Mixed-Use Waikiki Beach Walk Retail and Embassy Suites™ Hotel Held for Development and Construction in Progress Solana Beach Corporate Centre – Land Solana Beach – Highway 101 – Land Torrey Point (formerly Sorrento Pointe) – Construction in Progress Torrey Reserve – Construction in Progress Lloyd District Portfolio – Construction in Progress A summary of our real estate investments is as follows (in thousands): Retail Office Multifamily Mixed-Use Total December 31, 2015 Land $ 245,588 $ 143,575 $ 24,696 $ 76,635 $ 490,494 Buildings 500,075 665,431 210,093 125,860 1,501,459 Land improvements 40,203 8,273 3,280 2,363 54,119 Tenant improvements 54,993 63,880 — 1,846 120,719 Furniture, fixtures, and equipment 491 1,265 7,638 5,671 15,065 Construction in progress 20,817 41,669 1,649 37 64,172 (1) 862,167 924,093 247,356 212,412 2,246,028 Accumulated depreciation (223,274 ) (127,320 ) (38,626 ) (21,946 ) (411,166 ) Net real estate $ 638,893 $ 796,773 $ 208,730 $ 190,466 $ 1,834,862 December 31, 2014 Land $ 248,386 $ 143,575 $ 25,507 $ 76,635 $ 494,103 Buildings 500,088 621,343 42,270 125,798 1,289,499 Land improvements 39,999 8,273 3,085 2,363 53,720 Tenant improvements 50,504 56,127 — 1,679 108,310 Furniture, fixtures, and equipment 491 750 5,832 5,383 12,456 Construction in progress 5,327 31,878 141,205 326 178,736 (1) 844,795 861,946 217,899 212,184 2,136,824 Accumulated depreciation (205,339 ) (104,092 ) (35,431 ) (16,562 ) (361,424 ) Net real estate $ 639,456 $ 757,854 $ 182,468 $ 195,622 $ 1,775,400 (1) Land related to held for development and construction in progress is included in the Held for Development and Construction in Progress classifications on the consolidated balance sheets.
Consolidated Statements of Cash Flows-Supplemental Disclosures	The following table provides supplemental disclosures related to the Consolidated Statements of Cash Flows (in thousands): Year Ended December 31, 2015 2014 2013 Supplemental cash flow information Total interest costs incurred $ 54,829 $ 58,455 $ 60,133 Interest capitalized $ 7,569 $ 5,490 $ 2,113 Interest expense $ 47,260 $ 52,965 $ 58,020 Cash paid for interest, net of amounts capitalized $ 42,691 $ 48,032 $ 54,345 Cash paid for income taxes $ 633 $ 404 $ 901 Supplemental schedule of noncash investing and financing activities Accounts payable and accrued liabilities for construction in progress $ (14,733 ) $ 9,908 $ 5,001 Accrued leasing commissions $ (901 ) $ 763 $ 1,385 Accrued placement fees for senior guaranteed notes payable $ — $ 750 $ — Reduction to capital for prepaid equity financing costs $ 54 $ 40 $ 437

Real Estate (Tables)

Real Estate (Tables)	12 Months Ended
	Dec. 31, 2015
Real Estate [Abstract]
Summary of Real Estate Investments	A summary of the properties owned by us is as follows: Retail Carmel Country Plaza Del Monte Center Carmel Mountain Plaza Geary Marketplace South Bay Marketplace The Shops at Kalakaua Lomas Santa Fe Plaza Waikele Center Solana Beach Towne Centre Alamo Quarry Market Office Torrey Reserve Campus Lloyd District Portfolio Solana Beach Corporate Centre City Center Bellevue The Landmark at One Market One Beach Street First & Main Multifamily Loma Palisades Imperial Beach Gardens Mariner's Point Santa Fe Park RV Resort Hassalo on Eighth Mixed-Use Waikiki Beach Walk Retail and Embassy Suites™ Hotel Held for Development and Construction in Progress Solana Beach Corporate Centre – Land Solana Beach – Highway 101 – Land Torrey Point (formerly Sorrento Pointe) – Construction in Progress Torrey Reserve – Construction in Progress Lloyd District Portfolio – Construction in Progress A summary of our real estate investments is as follows (in thousands): Retail Office Multifamily Mixed-Use Total December 31, 2015 Land $ 245,588 $ 143,575 $ 24,696 $ 76,635 $ 490,494 Buildings 500,075 665,431 210,093 125,860 1,501,459 Land improvements 40,203 8,273 3,280 2,363 54,119 Tenant improvements 54,993 63,880 — 1,846 120,719 Furniture, fixtures, and equipment 491 1,265 7,638 5,671 15,065 Construction in progress 20,817 41,669 1,649 37 64,172 (1) 862,167 924,093 247,356 212,412 2,246,028 Accumulated depreciation (223,274 ) (127,320 ) (38,626 ) (21,946 ) (411,166 ) Net real estate $ 638,893 $ 796,773 $ 208,730 $ 190,466 $ 1,834,862 December 31, 2014 Land $ 248,386 $ 143,575 $ 25,507 $ 76,635 $ 494,103 Buildings 500,088 621,343 42,270 125,798 1,289,499 Land improvements 39,999 8,273 3,085 2,363 53,720 Tenant improvements 50,504 56,127 — 1,679 108,310 Furniture, fixtures, and equipment 491 750 5,832 5,383 12,456 Construction in progress 5,327 31,878 141,205 326 178,736 (1) 844,795 861,946 217,899 212,184 2,136,824 Accumulated depreciation (205,339 ) (104,092 ) (35,431 ) (16,562 ) (361,424 ) Net real estate $ 639,456 $ 757,854 $ 182,468 $ 195,622 $ 1,775,400 (1) Land related to held for development and construction in progress is included in the Held for Development and Construction in Progress classifications on the consolidated balance sheets.

Acquired In-Place Leases and 30

Acquired In-Place Leases and Above/Below Market Leases (Tables)	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
Schedule of acquired lease intangibles included in other assets and other liabilities	Increases (decreases) in net income as a result of amortization of our in-place leases, above market leases and below market leases are as follows (in thousands): Year Ended December 31, 2015 2014 2013 Amortization of in-place leases $ (4,767 ) $ (5,903 ) $ (9,120 ) Amortization of above market leases (1,767 ) (2,296 ) (4,052 ) Amortization of below market leases 4,686 5,057 6,440 Net loss $ (1,848 ) $ (3,142 ) $ (6,732 ) The following summarizes our acquired lease intangibles, which are included in other assets and other liabilities and deferred credits (in thousands): December 31, 2015 December 31, 2014 In-place leases $ 52,289 $ 53,967 Accumulated amortization (38,425 ) (35,336 ) Above market leases 22,201 22,500 Accumulated amortization (18,864 ) (17,397 ) Acquired lease intangible assets, net $ 17,201 $ 23,734 Below market leases $ 68,973 $ 70,013 Accumulated accretion (30,806 ) (27,161 ) Acquired lease intangible liabilities, net $ 38,167 $ 42,852
Future Amortization for Acquired In-Place Leases	As of December 31, 2015 , the amortization for acquired leases during the next five years and thereafter, assuming no early lease terminations, is as follows (in thousands): In-Place Leases Above Market Leases Below Market Leases Year Ending December 31, 2016 $ 3,931 $ 1,248 $ 4,605 2017 3,189 932 4,235 2018 1,893 628 3,572 2019 1,452 319 3,481 2020 909 99 2,917 Thereafter 2,490 111 19,357 $ 13,864 $ 3,337 $ 38,167

Fair Value of Financial Instr31

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Financial liabilities measured at fair value on recurring basis	A summary of our financial liabilities that are measured at fair value on a recurring basis by level within the fair value hierarchy is as follows (in thousands): December 31, 2015 December 31, 2014 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Deferred compensation liability $ — $ 929 $ — $ 929 $ — $ 981 $ — $ 981 Interest rate swap liability $ — $ 1,686 $ — $ 1,686 $ — $ 1,448 $ — $ 1,448
Carrying amount and fair value of financial instruments	A summary of the carrying amount and fair value of our financial instruments, all of which are based on Level 2 inputs, is as follows (in thousands): December 31, 2015 December 31, 2014 Carrying Value Fair Value Carrying Value Fair Value Secured notes payable $ 579,743 $ 592,956 $ 812,811 $ 850,475 Unsecured term loan $ 100,000 $ 100,000 $ 100,000 $ 100,000 Unsecured senior guaranteed notes $ 350,000 $ 357,779 $ 150,000 $ 154,560 Unsecured line of credit $ 30,000 $ 30,000 $ — $ —

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Components of Prepaid Expenses and Other Assets	Other assets consist of the following (in thousands): December 31, 2015 December 31, 2014 Leasing commissions, net of accumulated amortization of $23,565 and $20,659 respectively $ 18,952 $ 19,484 Acquired above market leases, net 3,337 5,103 Acquired in-place leases, net 13,864 18,631 Lease incentives, net of accumulated amortization of $3,341 and $2,960, respectively 509 740 Other intangible assets, net of accumulated amortization of $1,904 and $1,590, respectively 941 453 Debt issuance costs, net of accumulated amortization of $4,648 and $4,147, respectively 4,130 5,361 Prepaid expenses, deposits and other 4,336 3,629 Total other assets $ 46,069 $ 53,401

Other Liabilities and Deferre33

Other Liabilities and Deferred Credits (Tables)	12 Months Ended
	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Other liabilities and deferred credits	Other liabilities and deferred credits consist of the following (in thousands): December 31, 2015 December 31, 2014 Acquired below market leases, net $ 38,167 $ 42,852 Prepaid rent and deferred revenue 8,203 7,288 Interest rate swap liability 1,686 1,448 Straight-line rent liability 2,319 2,533 Deferred rent expense and lease intangible 434 584 Deferred compensation 929 981 Deferred tax liability 174 219 Other liabilities 60 88 Total other liabilities and deferred credits, net $ 51,972 $ 55,993

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Summary of total secured notes payable outstanding	The following is a summary of the Operating Partnership's total secured notes payable outstanding as of December 31, 2015 and December 31, 2014 (in thousands): Description of Debt Principal Balance as of Stated Interest Rate Stated Maturity Date December 31, 2015 December 31, 2014 as of December 31, 2015 The Shops at Kalakaua (1)(2) — 19,000 — % May 1, 2015 The Landmark at One Market (1)(3) — 133,000 — % July 5, 2015 Del Monte Center (1)(4) — 82,300 — % July 8, 2015 First & Main (1) 84,500 84,500 3.97 % July 1, 2016 Imperial Beach Gardens (1) 20,000 20,000 6.16 % September 1, 2016 Mariner’s Point (1) 7,700 7,700 6.09 % September 1, 2016 South Bay Marketplace (1) 23,000 23,000 5.48 % February 10, 2017 Waikiki Beach Walk—Retail (1) 130,310 130,310 5.39 % July 1, 2017 Solana Beach Corporate Centre III-IV (5) 35,920 36,376 6.39 % August 1, 2017 Loma Palisades (1) 73,744 73,744 6.09 % July 1, 2018 One Beach Street (1) 21,900 21,900 3.94 % April 1, 2019 Torrey Reserve—North Court (5) 20,749 21,075 7.22 % June 1, 2019 Torrey Reserve—VCI, VCII, VCIII (5) 6,995 7,101 6.36 % June 1, 2020 Solana Beach Corporate Centre I-II (5) 11,119 11,302 5.91 % June 1, 2020 Solana Beach Towne Centre (5) 37,065 37,675 5.91 % June 1, 2020 City Center Bellevue (1) 111,000 111,000 3.98 % November 1, 2022 Total 584,002 819,983 Unamortized fair value adjustment (4,259 ) (7,172 ) Total Secured Notes Payable $ 579,743 $ 812,811 (1) Interest only. (2) Loan repaid in full, without premium or penalty, on February 2, 2015. (3) Loan repaid in full, without premium or penalty, on April 6, 2015. (4) Loan repaid in full, without premium or penalty, on February 6, 2015. (5) Principal payments based on a 30 -year amortization schedule.
Scheduled principal payments on notes payable	Scheduled principal payments on secured and unsecured notes payable as of December 31, 2015 are as follows (in thousands): 2016 $ 113,974 2017 190,139 2018 75,224 2019 142,662 2020 51,003 Thereafter 461,000 $ 1,034,002

Derivative and Hedging (Tables)

Derivative and Hedging (Tables)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Derivatives	The following is a summary of the terms of the interest rate swap as of December 31, 2015 (dollars in thousands): Swap Counterparty Notional Amount Effective Date Maturity Date Fair Value Bank of America, N.A. $100,000 1/9/2014 1/9/2019 $ 1,686

Equity of American Assets Tru36

Equity of American Assets Trust, Inc. (Tables)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Dividends declared and paid on shares of common stock and noncontrolling common units	The following table lists the dividends declared and paid on our shares of common stock and Noncontrolling Common Units for the years ended December 31, 2015 , 2014 and 2013 : Period Amount per Share/Unit Period Covered Dividend Paid Date First Quarter 2013 $ 0.2100 January 1, 2013 to March 31, 2013 March 29, 2013 Second Quarter 2013 $ 0.2100 April 1, 2013 to June 30, 2013 June 28, 2013 Third Quarter 2013 $ 0.2100 July 1, 2013 to September 30, 2013 September 27, 2013 Fourth Quarter 2013 $ 0.2200 October 1, 2013 to December 31, 2013 December 27, 2013 First Quarter 2014 $ 0.2200 January 1, 2014 to March 31, 2014 March 28, 2014 Second Quarter 2014 $ 0.2200 April 1, 2014 to June 30, 2014 June 27, 2014 Third Quarter 2014 $ 0.2200 July 1, 2014 to September 30, 2014 September 26, 2014 Fourth Quarter 2014 $ 0.2325 October 1, 2014 to December 31, 2014 December 26, 2014 First Quarter 2015 $ 0.2325 January 1, 2015 to March 31, 2015 March 27, 2015 Second Quarter 2015 $ 0.2325 April 1, 2015 to June 30, 2015 June 26, 2015 Third Quarter 2015 $ 0.2325 July 1, 2015 to September 30, 2015 September 25, 2015 Fourth Quarter 2015 $ 0.2500 October 1, 2015 to December 31, 2015 December 23, 2015
Summary of income tax status of dividends per share paid	A summary of the income tax status of dividends per share paid is as follows: Year Ended December 31, 2015 2014 2013 Per Share % Per Share % Per Share % Ordinary income $ 0.72 75.9 % $ 0.61 68.9 % $ 0.83 97.6 % Capital gain 0.04 4.4 % — — % — — % Return of capital 0.19 19.7 % 0.28 31.1 % 0.02 2.4 % Total $ 0.95 100.0 % $ 0.89 100.0 % $ 0.85 100.0 %
Schedule of restricted common stock	The following shares of restricted common stock have been issued as of December 31, 2015 : Grant Price at Grant Date Number January 19, 2012 (1) $11.91 - $12.61 2,000 July 10, 2012 (2) $25.05 8,015 July 13, 2013 (2) $31.97 5,004 March 25, 2014 (3) $28.89 - $31.25 112,119 June 17, 2014 (4) $34.10 5,864 December 1, 2014 (5) $36.28 - $36.32 98,765 June 16, 2015 (4) $39.64 5,044 December 1, 2015 (6) $13.67 - $26.39 93,310 (1) Restricted common stock issued to certain of the company's senior management and other employees, which are subject to performance-based vesting. These shares vest in two substantially equal installments, with the first installment vested on the third anniversary of the date of grant and the second installment vesting on the fourth anniversary of the date of grant, subject to the employee's continued employment on those dates. (2) Restricted common stock issued to members of the company's non-employee directors. These awards of restricted stock vest ratably as to one-third of the shares granted on each of the first three anniversaries of the date of grant, subject to the director's continued service on our Board of Directors. (3) Restricted common stock issued to certain of the company's senior management and other employees, which are subject to pre-defined market specific performance criteria based vesting. Up to one-third of the shares of restricted stock may vest on each of November 30, 2014, 2015 and 2016, subject to the employee's continued employment on those dates. (4) Restricted common stock issued to members of the company's non-employee directors. These awards of restricted stock will vest subject to the director's continued service on the Board of Directors on the earlier of (i) the one year anniversary of the date of grant or (ii) the date of the next annual meeting of our stockholders, if such non-employee director continues his or her service on the Board of Directors until the next annual meeting of stockholders, but not thereafter, pursuant to our independent director compensation policy. (5) Restricted common stock issued to certain of the company's senior management and other employees, which are subject to pre-defined market specific performance criteria based vesting. Up to one-third of the shares of restricted stock may vest on each of November 30, 2015, 2016 and 2017, subject to the employee's continued employment on those dates. (6) Restricted common stock issued to certain of the company's senior management and other employees, which are subject to pre-defined market specific performance criteria based vesting. Up to one-third of the shares of restricted stock may vest on each of November 30, 2016, 2017 and 2018, subject to the employee's continued employment on those dates.
Activity of restricted stock awards	The following table summarizes the activity of non-vested restricted stock awards during the year ended December 31, 2015 : 2015 Units Weighted Average Grant Date Fair Value Balance at beginning of year 493,539 $ 22.01 Granted 98,354 22.11 Vested (376,462 ) 18.51 Forfeited (40,687 ) 32.78 Balance at end of year 174,744 $ 27.11
Computation of basic and diluted EPS	The computation of basic and diluted EPS is presented below (dollars in thousands, except share and per share amounts): Year Ended December 31, 2015 2014 2013 NUMERATOR Income from operations $ 53,915 $ 31,145 $ 22,594 Less: Net income attributable to restricted shares (168 ) (374 ) (536 ) Less: Income from operations attributable to unitholders in the Operating Partnership (15,238 ) (9,015 ) (6,838 ) Net income attributable to common stockholders—basic $ 38,509 $ 21,756 $ 15,220 Income from operations attributable to American Assets Trust, Inc. common stockholders—basic $ 38,509 $ 21,756 $ 15,220 Plus: Income from operations attributable to unitholders in the Operating Partnership 15,238 9,015 6,838 Net income attributable to common stockholders—diluted $ 53,747 $ 30,771 $ 22,058 DENOMINATOR Weighted average common shares outstanding—basic 44,439,112 42,041,126 39,539,457 Effect of dilutive securities—conversion of Operating Partnership units 17,900,051 17,906,348 17,976,353 Weighted average common shares outstanding—diluted 62,339,163 59,947,474 57,515,810 Earnings per common share, basic $ 0.87 $ 0.52 $ 0.38 Earnings per common share, diluted $ 0.86 $ 0.51 $ 0.38

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income tax provision	The income tax provision included in other income (expense) on the consolidated statement of income is as follows (in thousands): Year Ended December 31, 2015 Year Ended December 31, 2014 Year Ended December 31, 2013 Current: Federal $ 305 $ 190 $ 370 State 35 284 362 Deferred: Federal $ — $ — $ (47 ) State (45 ) (14 ) (40 ) Provision for income taxes $ 295 $ 460 $ 645

Commitments and Contingencies38

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Current minimum annual payments under the leases	Current minimum annual payments under the leases are as follows, as of December 31, 2015 (in thousands): 2016 $ 2,096 2017 3,097 (1) 2018 3,167 2019 3,240 2020 3,315 Thereafter 28,176 (2) Total $ 43,091 (1) Lease payments on the Waikiki Beach Walk lease will be equal to fair rental value from March 2017 through the end of the lease term. In the table, we have shown the lease payments for this period based on the stated rate for the month of February 2017 of $61,690 . (2) Lease payments on The Landmark at One Market lease will be equal to fair rental value from July 2021 through the end of the options lease term. In the table, we have shown the option lease payments for this period based on the stated rate for the month of June 2021 of $217,744 . As of December 31, 2015 , minimum future rentals from noncancelable operating leases before any reserve for uncollectible amounts and assuming no early lease terminations, at our office and retail properties and the retail portion of our mixed-use property are as follows for the years ended December 31 (in thousands): 2016 $ 167,417 2017 156,368 2018 123,262 2019 87,738 2020 65,087 Thereafter 181,245 Total $ 781,117

Operating Leases (Tables)

Operating Leases (Tables)	12 Months Ended
	Dec. 31, 2015
Leases, Operating [Abstract]
Current minimum future rentals under the leases	Current minimum annual payments under the leases are as follows, as of December 31, 2015 (in thousands): 2016 $ 2,096 2017 3,097 (1) 2018 3,167 2019 3,240 2020 3,315 Thereafter 28,176 (2) Total $ 43,091 (1) Lease payments on the Waikiki Beach Walk lease will be equal to fair rental value from March 2017 through the end of the lease term. In the table, we have shown the lease payments for this period based on the stated rate for the month of February 2017 of $61,690 . (2) Lease payments on The Landmark at One Market lease will be equal to fair rental value from July 2021 through the end of the options lease term. In the table, we have shown the option lease payments for this period based on the stated rate for the month of June 2021 of $217,744 . As of December 31, 2015 , minimum future rentals from noncancelable operating leases before any reserve for uncollectible amounts and assuming no early lease terminations, at our office and retail properties and the retail portion of our mixed-use property are as follows for the years ended December 31 (in thousands): 2016 $ 167,417 2017 156,368 2018 123,262 2019 87,738 2020 65,087 Thereafter 181,245 Total $ 781,117

Component of Rental Income an40

Component of Rental Income and Expense (Tables)	12 Months Ended
	Dec. 31, 2015
Operating Leases, Income Statement, Lease Revenue [Abstract]
Principal components of rental income	The principal components of rental income are as follows (in thousands): Year Ended December 31, 2015 2014 2013 Minimum rents Retail $ 72,999 $ 70,573 $ 69,374 Office 87,125 82,018 81,845 Multifamily 18,137 15,732 14,926 Mixed-Use 10,313 10,004 9,549 Cost reimbursement 30,796 29,052 27,583 Percentage rent 2,834 3,107 2,655 Hotel revenue 38,191 33,911 35,137 Other 1,492 1,681 1,688 Total rental income $ 261,887 $ 246,078 $ 242,757
Principal components of rental expenses	The principal components of rental expenses are as follows (in thousands): Year Ended December 31, 2015 2014 2013 Rental operating $ 27,611 $ 26,371 $ 26,028 Hotel operating 23,112 21,488 22,115 Repairs and maintenance 11,503 10,600 10,514 Marketing 2,104 1,623 1,547 Rent 2,511 2,452 2,442 Hawaii excise tax 4,408 3,981 4,153 Management fees 1,938 1,752 1,809 Total rental expenses $ 73,187 $ 68,267 $ 68,608

Other Income (Expenses) (Tables

Other Income (Expenses) (Tables)	12 Months Ended
	Dec. 31, 2015
Other Income and Expenses [Abstract]
Principal components of other income (expense), net	The principal components of other income (expense), net are as follows (in thousands): Year Ended December 31, 2015 2014 2013 Interest and investment income $ 90 $ 155 $ 148 Income tax expense (295 ) (460 ) (645 ) Other non-operating income 108 746 10 Total other income (expense) $ (97 ) $ 441 $ (487 )

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Schedule of segments operating activity	The following table represents operating activity within our reportable segments (in thousands): Year Ended December 31, 2015 2014 2013 Total Retail Property revenue $ 98,795 $ 96,140 $ 93,449 Property expense (25,672 ) (25,451 ) (23,900 ) Segment profit 73,123 70,689 69,549 Total Office Property revenue 97,651 92,474 90,527 Property expense (28,843 ) (27,003 ) (26,688 ) Segment profit 68,808 65,471 63,839 Total Multifamily Property revenue 19,455 16,976 16,125 Property expense (8,334 ) (6,099 ) (5,917 ) Segment profit 11,121 10,877 10,208 Total Mixed-Use Property revenue 59,722 54,410 54,956 Property expense (35,157 ) (32,678 ) (33,481 ) Segment profit 24,565 21,732 21,475 Total segments’ profit $ 177,617 $ 168,769 $ 165,071
Reconciliation of segment profit to net income attributable to stockholders	The following table is a reconciliation of segment profit to net income attributable to stockholders (in thousands): Year Ended December 31, 2015 2014 2013 Total segments' profit $ 177,617 $ 168,769 $ 165,071 General and administrative (20,074 ) (18,532 ) (17,195 ) Depreciation and amortization (63,392 ) (66,568 ) (66,775 ) Interest expense (47,260 ) (52,965 ) (58,020 ) Gain on sale of real estate 7,121 — — Other income (expense), net (97 ) 441 (487 ) Net income 53,915 31,145 22,594 Net income attributable to restricted shares (168 ) (374 ) (536 ) Net income attributable to unitholders in the Operating Partnership (15,238 ) (9,015 ) (6,838 ) Net income attributable to American Assets Trust, Inc. stockholders $ 38,509 $ 21,756 $ 15,220
Net Real Estate and Secured note payable balances by Segments	The following table shows net real estate and secured note payable balances for each of the segments, along with their capital expenditures for each year (in thousands): December 31, 2015 December 31, 2014 Net real estate Retail $ 638,893 $ 639,456 Office 796,773 757,854 Multifamily 208,730 182,468 Mixed-Use 190,466 195,622 $ 1,834,862 $ 1,775,400 Secured Notes Payable (1) Retail $ 60,065 $ 161,975 Office 292,183 426,254 Multifamily 101,444 101,444 Mixed-Use 130,310 130,310 $ 584,002 $ 819,983 Capital Expenditures (2) Retail $ 7,393 $ 8,671 Office 49,049 34,577 Multifamily 81,559 101,392 Mixed-Use 634 5,132 $ 138,635 $ 149,772 (1) Excludes unamortized fair market value adjustment of $4.3 million and $7.2 million as of December 31, 2015 and 2014 , respectively. (2) Capital expenditures represent cash paid for capital expenditures during the year and includes leasing commissions paid.

Quarterly Financial Informati43

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Information	The tables below reflect selected American Assets Trust, Inc. quarterly information for 2015 and 2014 (in thousands, except per shares data): Three Months Ended December 31, 2015 September 30, 2015 June 30, 2015 March 31, 2015 Total revenue $ 71,530 $ 71,289 $ 66,769 $ 66,035 Operating income 23,893 23,510 23,504 23,244 Net income 11,226 19,026 12,284 11,379 Net income attributable to restricted shares (53 ) (32 ) (40 ) (43 ) Net income attributable to unitholders in the Operating Partnership (2,961 ) (5,432 ) (3,536 ) (3,309 ) Net income attributable to American Assets Trust, Inc. stockholders $ 8,212 $ 13,562 $ 8,708 $ 8,027 Net income per share attributable to common stockholders - basic and diluted $ 0.18 $ 0.30 $ 0.20 $ 0.18 Three Months Ended December 31, September 30, June 30, March 31, Total revenue $ 66,478 $ 67,343 $ 62,199 $ 63,980 Operating income 22,526 23,036 17,726 20,381 Net income 10,046 9,090 5,351 6,658 Net income attributable to restricted shares (115 ) (95 ) (94 ) (70 ) Net income attributable to unitholders in the Operating Partnership (2,907 ) (2,578 ) (1,544 ) (1,986 ) Net income attributable to American Assets Trust, Inc. stockholders $ 7,024 $ 6,417 $ 3,713 $ 4,602 Net income per share attributable to common stockholders - basic and diluted $ 0.16 $ 0.15 $ 0.09 $ 0.11 The tables below reflect selected American Assets Trust, L.P. quarterly information for 2015 and 2014 (in thousands, except per shares data): Three Months Ended December 31, 2015 September 30, 2015 June 30, 2015 March 31, 2015 Total revenue $ 71,530 $ 71,289 $ 66,769 $ 66,035 Operating income 23,893 23,510 23,504 23,244 Net income 11,226 19,026 12,284 11,379 Net income attributable to restricted shares (53 ) (32 ) (40 ) (43 ) Net income attributable to American Assets Trust, L.P. unit holders $ 11,173 $ 18,994 $ 12,244 $ 11,336 Net income per unit attributable to unit holders - basic and diluted $ 0.18 $ 0.3 $ 0.2 $ 0.18 Three Months Ended December 31, 2014 September 30, 2014 June 30, 2014 March 31, 2014 Total revenue $ 66,478 $ 67,343 $ 62,199 $ 63,980 Operating income 22,526 23,036 17,726 20,381 Net income 10,046 9,090 5,351 6,658 Net income attributable to restricted shares (115 ) (95 ) (94 ) (70 ) Net income attributable to American Assets Trust, L.P. unit holders $ 9,931 $ 8,995 $ 5,257 $ 6,588 Net income per unit attributable to common unit holders - basic and diluted $ 0.16 $ 0.15 $ 0.09 $ 0.11

Summary of Significant Accoun44

Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2015USD ($)EmployeeSegmentRoomProperty	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Jan. 09, 2014
Summary Of Significant Accounting Policies [Line Items]
Number of employees | Employee	131
Number of office, retail, multifamily and mixed-use operating properties | Property	23
Properties held for development | Property	5
Allowance for doubtful accounts	$ (500,000)	$ (800,000)
Total bad debt expense	400,000	200,000	$ 100,000
Real estate depreciation expense	$ 54,200,000	56,000,000	52,000,000
Short term liquid investments, initial maturity	3 months
Cash balance at banks, federally insured amount	$ 250,000
Cash balance at banks, excess of FDIC insured limit	32,800,000	32,400,000
Restricted cash	$ 11,623,000	10,994,000
Number of operating segments | Segment	4
Room in mixed-use segment all-suite hotel | Room	369
Money Market Funds
Summary Of Significant Accounting Policies [Line Items]
Cash balance at banks, excess of FDIC insured limit	$ 100,000	20,000,000
Term Loan
Summary Of Significant Accounting Policies [Line Items]
Line of credit interest rate (in percents)				3.08%
Minimum
Summary Of Significant Accounting Policies [Line Items]
Percentage of taxable income required to distribute to qualify as real estate investment trust (REIT)	90.00%
Building And Improvement | Minimum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	30 years
Building And Improvement | Maximum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	40 years
Furniture And Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	3 years
Furniture And Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Real Estate, estimated useful lives	15 years
Deferred Rent Receivables
Summary Of Significant Accounting Policies [Line Items]
Allowance for doubtful accounts	$ (1,300,000)	(1,200,000)
Other Income
Summary Of Significant Accounting Policies [Line Items]
General excise tax recognized, gross	$ 3,700,000	$ 3,400,000	$ 3,500,000

Summary of Significant Accoun45

Summary of Significant Accounting Policies Supplemental Disclosures Related to Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental cash flow information
Total interest costs incurred	$ 54,829	$ 58,455	$ 60,133
Interest capitalized	7,569	5,490	2,113
Interest expense	47,260	52,965	58,020
Cash paid for interest, net of amounts capitalized	42,691	48,032	54,345
Cash paid for income taxes	633	404	901
Supplemental schedule of noncash investing and financing activities
Accounts payable and accrued liabilities for construction in progress	(14,733)	9,908	5,001
Accrued leasing commissions	(901)	763	1,385
Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction	0	750	0
Reduction to capital for prepaid equity financing costs	$ 54	$ 40	$ 437

Real Estate Summary of Real Est

Real Estate Summary of Real Estate Investments (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Real Estate Properties [Line Items]
Construction in progress		$ 73,121	$ 195,736
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
Total Retail
Real Estate Properties [Line Items]
Net real estate		638,893	639,456
Total Office
Real Estate Properties [Line Items]
Net real estate		796,773	757,854
Real Estate Investment
Real Estate Properties [Line Items]
Land		490,494	494,103
Buildings		1,501,459	1,289,499
Land improvements		54,119	53,720
Tenant improvements		120,719	108,310
Furniture, fixtures, and equipment		15,065	12,456
Construction in progress	[1]	64,172	178,736
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
Real Estate Investment | Total Retail
Real Estate Properties [Line Items]
Land		245,588	248,386
Buildings		500,075	500,088
Land improvements		40,203	39,999
Tenant improvements		54,993	50,504
Furniture, fixtures, and equipment		491	491
Construction in progress		20,817	5,327
Total Real estate, at cost		862,167	844,795
Accumulated depreciation		(223,274)	(205,339)
Net real estate		638,893	639,456
Real Estate Investment | Total Office
Real Estate Properties [Line Items]
Land		143,575	143,575
Buildings		665,431	621,343
Land improvements		8,273	8,273
Tenant improvements		63,880	56,127
Furniture, fixtures, and equipment		1,265	750
Construction in progress		41,669	31,878
Total Real estate, at cost		924,093	861,946
Accumulated depreciation		(127,320)	(104,092)
Net real estate		796,773	757,854
Real Estate Investment | Total Multifamily
Real Estate Properties [Line Items]
Land		24,696	25,507
Buildings		210,093	42,270
Land improvements		3,280	3,085
Tenant improvements		0	0
Furniture, fixtures, and equipment		7,638	5,832
Construction in progress		1,649	141,205
Total Real estate, at cost		247,356	217,899
Accumulated depreciation		(38,626)	(35,431)
Net real estate		208,730	182,468
Real Estate Investment | Total Mixed-Use
Real Estate Properties [Line Items]
Land		76,635	76,635
Buildings		125,860	125,798
Land improvements		2,363	2,363
Tenant improvements		1,846	1,679
Furniture, fixtures, and equipment		5,671	5,383
Construction in progress		37	326
Total Real estate, at cost		212,412	212,184
Accumulated depreciation		(21,946)	(16,562)
Net real estate		$ 190,466	$ 195,622
[1]	Land related to held for development and construction in progress is included in the Held for Development and Construction in Progress classifications on the consolidated balance sheets.

Real Estate (Details)

Real Estate (Details) - USD ($) $ in Thousands	Aug. 06, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of real estate, net of selling costs		$ 12,259	$ 0	$ 0
Rancho Carmel Plaza
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration from sale of property	$ 12,700
Proceeds from sale of real estate, net of selling costs	$ 12,300
Gain on sale of property		$ 7,100

Acquired In-Place Leases and 48

Acquired In-Place Leases and Above/Below Market Leases Summary of Acquired Lease Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets	$ 3,337	$ 5,103
Net of accumulated amortization of other intangible assets	(1,904)	(1,590)
Below Market Lease [Abstract]
Below market leases	68,973	70,013
Accumulated accretion	(30,806)	(27,161)
Acquired lease intangible liabilities, net	38,167	42,852
In-place leases
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets	52,289	53,967
Net of accumulated amortization of other intangible assets	(38,425)	(35,336)
Acquired lease intangible assets, net	13,864
Above Market Leases
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets	22,201	22,500
Net of accumulated amortization of other intangible assets	(18,864)	(17,397)
Acquired lease intangible assets, net	3,337
Acquired lease intangible assets
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets, net	$ 17,201	$ 23,734

Acquired In-Place Leases and 49

Acquired In-Place Leases and Above/Below Market Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of acquired above and below market leases	$ 2.9	$ 2.8	$ 2.4
Weighted-average amortization period of below market leases	7 years 10 months
Acquired lease, below market renewal options	$ 17.5
Weighted-average amortization period of acquired leases prior to the commencement of renewal option	9 years 9 months
In-place leases
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period of acquired leases	2 years
Above Market Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period of acquired leases	8 months

Acquired In-Place Leases and 50

Acquired In-Place Leases and Above/Below Market Leases Increases (Decreases) in Net Income as Result of Amortization of In-Place Leases Above Market Leases and Below Market Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of leases	$ (1,848)	$ (3,142)	$ (6,732)
Amortization of below market leases	4,686	5,057	6,440
In-place leases
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of leases	(4,767)	(5,903)	(9,120)
Above Market Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of leases	$ (1,767)	$ (2,296)	$ (4,052)

Acquired In-Place Leases and 51

Acquired In-Place Leases and Above/Below Market Leases Amortization for Acquired In-Place Leases During Next Five Years and Thereafter Assuming No Early Lease Terminations (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Below Market Lease, Net, Amortization Income, Fiscal Year Maturity [Abstract]
2,016	$ 4,605
2,017	4,235
2,018	3,572
2,019	3,481
2,020	2,917
Thereafter	19,357
Acquired lease intangible liabilities, net	38,167	$ 42,852
In-place leases
Acquired Finite-Lived Intangible Assets [Line Items]
2,016	3,931
2,017	3,189
2,018	1,893
2,019	1,452
2,020	909
Thereafter	2,490
Acquired lease intangible assets, net	13,864
Above Market Leases
Acquired Finite-Lived Intangible Assets [Line Items]
2,016	1,248
2,017	932
2,018	628
2,019	319
2,020	99
Thereafter	111
Acquired lease intangible assets, net	$ 3,337

Fair Value of Financial Instr52

Fair Value of Financial Instruments Liabilities Fair Value Measurement on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation liability	$ 929	$ 981
Interest rate swap liability	1,686	1,448
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation liability	0	0
Interest rate swap liability	0	0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation liability	929	981
Interest rate swap liability	1,686	1,448
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation liability	0	0
Interest rate swap liability	$ 0	$ 0

Fair Value of Financial Instr53

Fair Value of Financial Instruments (Details) - Fair Value, Inputs, Level 2	12 Months Ended
	Dec. 31, 2015
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Interest rate used to estimate fair value of mortgages and notes payable (in percents)	3.50%
Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Interest rate used to estimate fair value of mortgages and notes payable (in percents)	6.40%

Fair Value of Financial Instr54

Fair Value of Financial Instruments Carrying Amount and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Secured notes payable | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 579,743	$ 812,811
Secured notes payable | Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	592,956	850,475
Unsecured term loan | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	100,000	100,000
Unsecured term loan | Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	100,000	100,000
Unsecured senior guaranteed notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	350,000	150,000
Unsecured senior guaranteed notes | Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	357,779	154,560
Unsecured line of credit | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	30,000	0
Unsecured line of credit | Estimate of Fair Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 30,000	$ 0

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Leasing commissions, net of accumulated amortization of $23,565 and $20,659 respectively	$ 18,952	$ 19,484
Acquired above market leases, net	3,337	5,103
Acquired in-place leases, net	13,864	18,631
Lease incentives, net of accumulated amortization of $3,341 and $2,960, respectively	509	740
Other intangible assets, net of accumulated amortization of $1,904 and $1,590, respectively	941	453
Debt issuance costs, net of accumulated amortization of $4,648 and $4,147, respectively	4,130	5,361
Prepaid expenses, deposits and other	4,336	3,629
Total other assets	46,069	53,401
Leasing commissions, accumulative amortization	23,565	20,659
Lease incentives, accumulated amortization	3,341	2,960
Other intangible assets, accumulated amortization	1,904	1,590
Debt issuance costs, accumulated amortization	$ 4,648	$ 4,147

Other Liabilities and Deferre56

Other Liabilities and Deferred Credits (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Acquired below market leases, net	$ 38,167	$ 42,852
Prepaid rent and deferred revenue	8,203	7,288
Interest rate swap liability	1,686	1,448
Straight-line rent liability	2,319	2,533
Deferred rent expense and lease intangible	434	584
Deferred compensation	929	981
Deferred tax liabilities	174	219
Other liabilities	60	88
Total other liabilities and deferred credits, net	$ 51,972	$ 55,993

Debt Summary of Total Secured N

Debt Summary of Total Secured Notes Payable Outstanding (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Notes payable, total		$ 1,034,002
American Assets Trust, L.P. | The Shops at Kalakaua
Debt Instrument [Line Items]
Stated Interest Rate	[1],[2]	0.00%
Stated Maturity Date	[1],[2]	May 1, 2015
American Assets Trust, L.P. | The Land Mark at One Market
Debt Instrument [Line Items]
Stated Interest Rate	[1],[3]	0.00%
Stated Maturity Date	[1],[3]	Jul. 5, 2015
American Assets Trust, L.P. | Del Monte Center
Debt Instrument [Line Items]
Stated Interest Rate	[1],[4]	0.00%
Stated Maturity Date	[1],[4]	Jul. 8, 2015
American Assets Trust, L.P. | First & Main
Debt Instrument [Line Items]
Stated Interest Rate	[1]	3.97%
Stated Maturity Date	[1]	Jul. 1, 2016
American Assets Trust, L.P. | Imperial Beach Gardens
Debt Instrument [Line Items]
Stated Interest Rate	[1]	6.16%
Stated Maturity Date	[1]	Sep. 1, 2016
American Assets Trust, L.P. | Mariner's Point
Debt Instrument [Line Items]
Stated Interest Rate	[1]	6.09%
Stated Maturity Date	[1]	Sep. 1, 2016
American Assets Trust, L.P. | South Bay Marketplace
Debt Instrument [Line Items]
Stated Interest Rate	[1]	5.48%
Stated Maturity Date	[1]	Feb. 10, 2017
American Assets Trust, L.P. | Waikiki Beach Walk - Retail
Debt Instrument [Line Items]
Stated Interest Rate	[1]	5.39%
Stated Maturity Date	[1]	Jul. 1, 2017
American Assets Trust, L.P. | Solana Beach Corporate Centre III-IV
Debt Instrument [Line Items]
Stated Interest Rate	[5]	6.39%
Stated Maturity Date	[5]	Aug. 1, 2017
American Assets Trust, L.P. | Loma Palisades
Debt Instrument [Line Items]
Stated Interest Rate	[1]	6.09%
Stated Maturity Date	[1]	Jul. 1, 2018
American Assets Trust, L.P. | One Beach Street
Debt Instrument [Line Items]
Stated Interest Rate	[1]	3.94%
Stated Maturity Date	[1]	Apr. 1, 2019
American Assets Trust, L.P. | Torrey Reserve - North Court
Debt Instrument [Line Items]
Stated Interest Rate	[5]	7.22%
Stated Maturity Date	[5]	Jun. 1, 2019
American Assets Trust, L.P. | Torrey Reserve-VCI, VCII, VCIII
Debt Instrument [Line Items]
Stated Interest Rate	[5]	6.36%
Stated Maturity Date	[5]	Jun. 1, 2020
American Assets Trust, L.P. | Solana Beach Corporate Centre I-II
Debt Instrument [Line Items]
Stated Interest Rate	[5]	5.91%
Stated Maturity Date	[5]	Jun. 1, 2020
American Assets Trust, L.P. | Solana Beach Towne Centre
Debt Instrument [Line Items]
Stated Interest Rate	[5]	5.91%
Stated Maturity Date	[5]	Jun. 1, 2020
American Assets Trust, L.P. | City Center Bellevue
Debt Instrument [Line Items]
Stated Interest Rate	[1]	3.98%
Stated Maturity Date	[1]	Nov. 1, 2022
Secured notes payable | American Assets Trust, L.P.
Debt Instrument [Line Items]
Secured notes payable, Principal Balance		$ 584,002	$ 819,983
Unamortized fair value adjustment		(4,259)	(7,172)
Notes payable, total		$ 579,743	812,811
Number of year amortization schedule		30 years
Secured notes payable | American Assets Trust, L.P. | The Shops at Kalakaua
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1],[2]	$ 0	19,000
Secured notes payable | American Assets Trust, L.P. | The Land Mark at One Market
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1],[3]	0	133,000
Secured notes payable | American Assets Trust, L.P. | Del Monte Center
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1],[4]	0	82,300
Secured notes payable | American Assets Trust, L.P. | First & Main
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1]	84,500	84,500
Secured notes payable | American Assets Trust, L.P. | Imperial Beach Gardens
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1]	20,000	20,000
Secured notes payable | American Assets Trust, L.P. | Mariner's Point
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1]	7,700	7,700
Secured notes payable | American Assets Trust, L.P. | South Bay Marketplace
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1]	23,000	23,000
Secured notes payable | American Assets Trust, L.P. | Waikiki Beach Walk - Retail
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1]	130,310	130,310
Secured notes payable | American Assets Trust, L.P. | Solana Beach Corporate Centre III-IV
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[5]	35,920	36,376
Secured notes payable | American Assets Trust, L.P. | Loma Palisades
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1]	73,744	73,744
Secured notes payable | American Assets Trust, L.P. | One Beach Street
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1]	21,900	21,900
Secured notes payable | American Assets Trust, L.P. | Torrey Reserve - North Court
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[5]	20,749	21,075
Secured notes payable | American Assets Trust, L.P. | Torrey Reserve-VCI, VCII, VCIII
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[5]	6,995	7,101
Secured notes payable | American Assets Trust, L.P. | Solana Beach Corporate Centre I-II
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[5]	11,119	11,302
Secured notes payable | American Assets Trust, L.P. | Solana Beach Towne Centre
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[5]	37,065	37,675
Secured notes payable | American Assets Trust, L.P. | City Center Bellevue
Debt Instrument [Line Items]
Secured notes payable, Principal Balance	[1]	$ 111,000	$ 111,000
[1]	Interest only.
[2]	Loan repaid in full, without premium or penalty, on February 2, 2015.
[3]	Loan repaid in full, without premium or penalty, on April 6, 2015.
[4]	Loan repaid in full, without premium or penalty, on February 6, 2015.
[5]	Principal payments based on a 30-year amortization schedule.

Debt Summary of Total Unsecured

Debt Summary of Total Unsecured Notes Payable Outstanding (Details) $ in Thousands		Aug. 19, 2014	Dec. 31, 2015USD ($)Extension_Option	Dec. 31, 2014USD ($)	Jan. 09, 2014USD ($)
Debt Instrument [Line Items]
Unsecured notes payable			$ 450,000	$ 250,000
American Assets Trust, L.P.
Debt Instrument [Line Items]
Unsecured notes payable			$ 450,000	250,000
American Assets Trust, L.P. | Interest Rate Swap
Debt Instrument [Line Items]
Fixed interest rate on derivative		2.1305%	3.08%
Term of derivative contract			7 years
American Assets Trust, L.P. | Forward Contracts
Debt Instrument [Line Items]
Term of derivative contract		1 month	1 month
Gain on derivatives			$ 1,600
Effective interest rate (percent)			3.88%
Term Loan | American Assets Trust, L.P.
Debt Instrument [Line Items]
Unsecured notes payable			$ 100,000	100,000	$ 100,000
Stated Maturity Date	[1]		Jan. 9, 2019
Number of extensions available | Extension_Option			2
Extension term (in months)			12 months
Senior Guaranteed Notes, Series A | American Assets Trust, L.P.
Debt Instrument [Line Items]
Unsecured notes payable			$ 150,000	150,000
Stated Interest Rate	[2]		4.04%
Stated Maturity Date			Oct. 31, 2021
Senior Guaranteed Notes, Series B | American Assets Trust, L.P.
Debt Instrument [Line Items]
Unsecured notes payable			$ 100,000	0
Stated Interest Rate			4.45%
Stated Maturity Date			Feb. 2, 2025
Senior Guaranteed Notes, Series C | American Assets Trust, L.P.
Debt Instrument [Line Items]
Unsecured notes payable			$ 100,000	$ 0
Stated Interest Rate			4.50%
Stated Maturity Date			Apr. 1, 2025
[1]	The Operating Partnership has an option to extend the Term Loan up to two times, with each such extension for a 12-month period. The foregoing extension options are exercisable by the Operating Partnership subject to the satisfaction of certain conditions.
[2]	The company entered into a one-month forward-starting seven-year swap contract on August 19, 2014, which was settled on September 19, 2014 at a gain of approximately $1.6 million (see Note 8). The forward-starting seven-year swap contract was deemed to be a highly effective cash flow hedge, accordingly, the effective interest rate is approximately 3.88% per annum.

Debt (Details)

Debt (Details)	Oct. 31, 2014USD ($)	Jan. 09, 2014USD ($)Extension_Option	Sep. 07, 2012	Jan. 10, 2012	Mar. 07, 2011	Dec. 31, 2015USD ($)Extension_Option	Dec. 31, 2014USD ($)	Jan. 19, 2011USD ($)
Debt Instrument [Line Items]
Unsecured line of credit						$ 30,000,000	$ 0
Unsecured notes payable						450,000,000	250,000,000
Unsecured line of credit
Debt Instrument [Line Items]
Maximum leverage ratio of revolving credit facility		60.00%
Maximum secured leverage ratio on revolving credit facility		40.00%
Minimum fixed charge coverage ratio covenant threshold		1.5
Minimum interest coverage ratio covenant threshold		175.00%
Maximum unsecured leverage ratio (in percents)		60.00%
Minimum tangible net worth		$ 721,160,000
Percent of net proceeds of any additional equity issuances in relation to net proceeds as of Offering		75.00%
Maximum recourse indebtedness of total asset value (in percents)		15.00%
Percentage annual distributions cannot exceed funds from operations		95.00%
Unsecured line of credit | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate (in percents)		0.50%
Unsecured line of credit | Eurodollar [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (in percents)		1.00%
American Assets Trust, L.P.
Debt Instrument [Line Items]
Revolving credit facility borrowing limit, maximum borrowing capacity								$ 250,000,000
Years, maximum maturities of securities					30 years
Year, extension on term of revolving credit facility				1 year
Percent of secured indebtedness of the company's secured total asset value			55.00%
Line of credit facility material acquisition			100
Unsecured line of credit						30,000,000	0
Unsecured notes payable						450,000,000	250,000,000
American Assets Trust, L.P. | Subject to meeting specified requirements and obtaining additional commitments
Debt Instrument [Line Items]
Revolving credit facility borrowing limit, maximum borrowing capacity								$ 400,000,000
American Assets Trust, L.P. | Unsecured line of credit | Base Rate [Member]
Debt Instrument [Line Items]
Variable rate basis		base rate
American Assets Trust, L.P. | Unsecured line of credit | Revolving Credit Facility
Debt Instrument [Line Items]
Number of extensions available | Extension_Option		2
Extension term (in months)		6 months
American Assets Trust, L.P. | Note Purchase Agreement | Senior Guaranteed Notes
Debt Instrument [Line Items]
Principal of non-recourse mortgage loan	$ 350,000,000
Partial debt repayment, minimum percentage of principal (in percent)	5.00%
Full debt repayment percentage of principal plus a Make-Whole Amount (in percent)	100.00%
American Assets Trust, L.P. | Note Purchase Agreement | Senior Guaranteed Notes, Series A
Debt Instrument [Line Items]
Principal of non-recourse mortgage loan	$ 150,000,000
Stated Interest Rate	4.04%
American Assets Trust, L.P. | Note Purchase Agreement | Senior Guaranteed Notes, Series B
Debt Instrument [Line Items]
Principal of non-recourse mortgage loan	$ 100,000,000
Stated Interest Rate	4.45%
American Assets Trust, L.P. | Note Purchase Agreement | Senior Guaranteed Notes, Series C
Debt Instrument [Line Items]
Principal of non-recourse mortgage loan	$ 100,000,000
Stated Interest Rate	4.50%
American Assets Trust, L.P. | Amended and Restated Credit Facility
Debt Instrument [Line Items]
Revolving credit facility borrowing limit, maximum borrowing capacity		$ 350,000,000
Allowable additional borrowing capacity		$ 250,000,000
American Assets Trust, L.P. | Amended and Restated Credit Facility | Minimum | Revolving Credit Facility | Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (in percents)		0.35%
American Assets Trust, L.P. | Amended and Restated Credit Facility | Maximum | Revolving Credit Facility | Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (in percents)		0.95%
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured line of credit
Debt Instrument [Line Items]
Unsecured line of credit						$ 30,000,000
Weighted average interest rate (in percent)						1.54%
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured line of credit | Base Rate [Member]
Debt Instrument [Line Items]
Prime rate		prime rate
Federal funds rate		federal funds rate
Eurodollar		Eurodollar
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured line of credit | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility borrowing limit, maximum borrowing capacity		$ 250,000,000
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured line of credit | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Variable rate basis		LIBOR
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured line of credit | Minimum | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (in percents)		1.35%
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured line of credit | Maximum | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (in percents)		1.95%
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured term loan
Debt Instrument [Line Items]
Revolving credit facility borrowing limit, maximum borrowing capacity		$ 100,000,000
Number of extensions available | Extension_Option		3
Extension term (in months)		12 months
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured term loan | Minimum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (in percents)		1.30%
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured term loan | Minimum | Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (in percents)		0.30%
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured term loan | Maximum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (in percents)		1.90%
American Assets Trust, L.P. | Amended and Restated Credit Facility | Unsecured term loan | Maximum | Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (in percents)		0.90%
American Assets Trust, L.P. | Term Loan
Debt Instrument [Line Items]
Number of extensions available | Extension_Option						2
Extension term (in months)						12 months
Unsecured notes payable		$ 100,000,000				$ 100,000,000	$ 100,000,000

Debt Scheduled Principal Paymen

Debt Scheduled Principal Payments on Notes Payable (Details) $ in Thousands	Dec. 31, 2015USD ($)
Debt Disclosure [Abstract]
2,015	$ 113,974
2,016	190,139
2,017	75,224
2,018	142,662
2,019	51,003
Thereafter	461,000
Notes payable, total	$ 1,034,002

Derivative and Hedging (Details

Derivative and Hedging (Details) - USD ($)	Sep. 19, 2014	Aug. 19, 2014	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liabilities at fair value			$ 1,686,000	$ 1,448,000
American Assets Trust, L.P. | Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount		$ 150,000,000
Fixed interest rate on derivative		2.1305%	3.08%
Term of derivative contract			7 years
American Assets Trust, L.P. | Forward Contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Term of derivative contract		1 month	1 month
American Assets Trust, L.P. | Cash Flow Hedging | Designated as Hedging Instrument | Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount			$ 100,000,000
Fixed interest rate on derivative			3.08%
Effective date			Jan. 9, 2014
Maturity date			Jan. 9, 2019
Derivative liabilities at fair value			$ 1,686,000
Gain recognized in other comprehensive income (loss)	$ 1,600,000

Partners Capital of American 62

Partners Capital of American Assets Trust, L.P. (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Capital Unit [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	71.70%
Common Stock
Capital Unit [Line Items]
Conversion of operating partnership units (in shares)	5,741	11,852	106,326
American Assets Trust, L.P.
Capital Unit [Line Items]
Noncontrolling common units	17,899,516
Percentage of ownership interests classified as noncontrolling	28.30%
American Assets Trust, L.P. | Common Stock
Capital Unit [Line Items]
Conversion of operating partnership units (in shares)	5,741	11,852	106,326

Equity of American Assets Tru63

Equity of American Assets Trust, Inc. (Details)	May. 27, 2015USD ($)Agent	Mar. 09, 2015USD ($)$ / sharesshares	Sep. 12, 2014USD ($)$ / sharesshares	May. 06, 2013USD ($)Agent	Dec. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2014USD ($)shares	Dec. 31, 2013USD ($)shares
Equity [Line Items]
Preferred stock, shares authorized | shares					10,000,000
Preferred stock, par-value (in dollars per share) | $ / shares					$ 0.01
Equity incentive award plan, common stock authorized for issuance | shares					4,054,411
Equity incentive award plan, common stock available for future issuance | shares					3,093,627
Noncash compensation expense					$ 2,900,000	$ 3,700,000	$ 2,800,000
Unrecognized compensation expense					$ 2,800,000
Weighted average unvested shares outstanding | shares					184,545	430,584	630,130
American Assets Trust, L.P.
Equity [Line Items]
Antidilutive securities excluded from computation of EPS (in shares) | shares					184,545	430,584	630,130
Restricted Stock
Equity [Line Items]
Unrecognized compensation expense, weighted-average recognition period (in years)					18 months 25 days
At The Market Equity Program
Equity [Line Items]
Aggregate offering price of common share	$ 250,000,000			$ 150,000,000
Common shares issued (in shares) | shares					1,612,451
Weighted average price per share (in dollars per share) | $ / shares					$ 40.77
Gross proceeds from issuance of common stock					$ 65,700,000
Remaining capacity available for issuance					216,600,000
At The Market Equity Program | Commissions
Equity [Line Items]
Payments of stock issuance costs					(700,000)
At The Market Equity Program | Other Offering Costs
Equity [Line Items]
Payments of stock issuance costs					$ (400,000)
Private Placement | Explorer Insurance Company | Board of Directors Chairman
Equity [Line Items]
Common shares issued (in shares) | shares		200,000
Gross proceeds from issuance of common stock		$ 8,100,000
Share price (in dollars per share) | $ / shares		$ 40.54
Private Placement | ICW Plaza | Board of Directors Chairman
Equity [Line Items]
Common shares issued (in shares) | shares			400,000
Gross proceeds from issuance of common stock			$ 13,500,000
Share price (in dollars per share) | $ / shares			$ 33.76
$150.0 Million ATM | At The Market Equity Program
Equity [Line Items]
Number of sales agents | Agent				4
$250.0 Million ATM | At The Market Equity Program
Equity [Line Items]
Number of sales agents | Agent	5

Equity of American Assets Tru64

Equity of American Assets Trust, Inc. Dividends Declared and Paid on Shares of Common Stock and Noncontrolling Common Units (Details) - $ / shares

3 Months Ended

12 Months Ended

Dec. 31, 2015

Sep. 30, 2015

Jun. 30, 2015

Mar. 31, 2015

Dec. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Equity [Abstract]

Dividends period

Fourth Quarter 2015

Third Quarter 2015

Second Quarter 2015

First Quarter 2015

Fourth Quarter 2014

Third Quarter 2014

Second Quarter 2014

First Quarter 2014

Fourth Quarter 2013

Third Quarter 2013

Second Quarter 2013

First Quarter 2013

Amount per Share/Unit (in USD per unit)

$ 0.25

$ 0.2325

$ 0.2325

$ 0.2325

$ 0.2325

$ 0.22

$ 0.22

$ 0.22

$ 0.22

$ 0.21

$ 0.21

$ 0.2100

$ 0.95

$ 0.89

$ 0.85

Date dividend to be paid

Dec. 23, 2015

Sep. 25, 2015

Jun. 26, 2015

Mar. 27, 2015

Dec. 26, 2014

Sep. 26, 2014

Jun. 27, 2014

Mar. 28, 2014

Dec. 27, 2013

Sep. 27, 2013

Jun. 28, 2013

Mar. 29, 2013

Equity of American Assets Tru65

Equity of American Assets Trust, Inc. Summary of Income Tax Status of Dividends Per Share Paid (Details) - $ / shares	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity [Abstract]
Ordinary income (in USD per share)													$ 0.72	$ 0.61	$ 0.83
Capital gain (in USD per share)													0.04	0	0
Return of capital (in USD per share)													0.19	0.28	0.02
Total (in USD per share)	$ 0.25	$ 0.2325	$ 0.2325	$ 0.2325	$ 0.2325	$ 0.22	$ 0.22	$ 0.22	$ 0.22	$ 0.21	$ 0.21	$ 0.2100	$ 0.95	$ 0.89	$ 0.85
Ordinary income													75.90%	68.90%	97.60%
Capital gain													4.40%	0.00%	0.00%
Return of capital													19.70%	31.10%	2.40%
Total													100.00%	100.00%	100.00%

Equity of American Assets Tru66

Equity of American Assets Trust, Inc. Restricted Common Stock Issued (Details) - Restricted Stock - $ / shares	Dec. 01, 2015	Jun. 16, 2015	Dec. 01, 2014	Jun. 17, 2014	Mar. 25, 2014	Jul. 13, 2013	Jul. 10, 2012	Jan. 19, 2012	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights								2
Award vesting period									3 years
Award vesting percentage	33.30%		33.30%		33.30%	33.30%	33.30%
Granted, Weighted Average Grant Date Fair Value (in USD per share)		$ 39.64		$ 34.10		$ 31.97	$ 25.05
Granted, Shares	93,310	5,044	98,765	5,864	112,119	5,004	8,015	2,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Weighted Average Grant Date Fair Value (in USD per share)	$ 13,670		$ 36.28		$ 28.89			$ 11.91
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Weighted Average Grant Date Fair Value (in USD per share)	$ 26,390		$ 36.32		$ 31.25			$ 12.61

Equity of American Assets Tru67

Equity of American Assets Trust, Inc. Summary of Activity of Restricted Stock Awards (Details) - Restricted Stock Units (RSUs)	12 Months Ended
	Dec. 31, 2015$ / sharesshares
Nonvested, Number of Shares
Nonvested, Beginning, Shares | shares	493,539
Granted, Shares | shares	98,354
Vested, Shares | shares	(376,462)
Forfeited, Shares | shares	(40,687)
Nonvested, Ending, Shares | shares	174,744
Nonvested, Weighted Average Grant Date Fair Value
Nonvested, Beginning, Weighted Average Grant Date Fair Value (in USD per Share) | $ / shares	$ 22.01
Granted, Weighted Average Grant Date Fair Value (in USD per share) | $ / shares	22.11
Vested, Weighted Average Grant Date Fair Value (in USD per share) | $ / shares	18.51
Forfeited, Weighted Average Grant Date Fair Value (in USD per share) | $ / shares	32.78
Nonvested, End of Year, Weighted Average Grant Date Fair Value (in USD per Share) | $ / shares	$ 27.11

Equity of American Assets Tru68

Equity of American Assets Trust, Inc. Computation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
NUMERATOR
Income from continuing operations									$ 53,915	$ 31,145	$ 22,594
Less: Net income attributable to restricted shares	$ (53)	$ (32)	$ (40)	$ (43)	$ (115)	$ (95)	$ (94)	$ (70)	(168)	(374)	(536)
Less: Income from operations attributable to unitholders in the Operating Partnership									(15,238)	(9,015)	(6,838)
NET INCOME ATTRIBUTABLE TO AMERICAN ASSETS TRUST, INC. STOCKHOLDERS	$ 8,212	$ 13,562	$ 8,708	$ 8,027	$ 7,024	$ 6,417	$ 3,713	$ 4,602	38,509	21,756	15,220
Income from operations attributable to American Assets Trust, Inc. common stockholders—basic									38,509	21,756	15,220
Plus: Income from operations attributable to unitholders in the Operating Partnership									15,238	9,015	6,838
Net income attributable to common stockholders-diluted									$ 53,747	$ 30,771	$ 22,058
DENOMINATOR
Weighted average shares of common stock outstanding-basic (in shares)									44,439,112	42,041,126	39,539,457
Effect of dilutive securities-conversion of Operating Partnership units (in shares)									17,900,051	17,906,348	17,976,353
Weighted average common shares outstanding - diluted (in shares)									62,339,163	59,947,474	57,515,810
Earnings (loss) per common share-basic
Basic net income attributable to common stockholders per share (in dollars per share)									$ 0.87	$ 0.52	$ 0.38
Earnings (loss) per common share-diluted
Diluted net income attributable to common stockholders per share (in dollars per share)									$ 0.86	$ 0.51	$ 0.38

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Deferred tax liabilities	$ 174	$ 219

Income Taxes Income Tax Provisi

Income Taxes Income Tax Provision Included in Other Income Expense on Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Federal	$ 305	$ 190	$ 370
State	35	284	362
Federal	0	0	(47)
State	(45)	(14)	(40)
Provision for income taxes	$ 295	$ 460	$ 645

Commitments and Contingencies71

Commitments and Contingencies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)PropertyCustomerOptionPlanmo	Dec. 31, 2014
Commitment And Contingencies [Line Items]
Termination payment, as high as | $	$ 6.8
Percentage, partner's common units	50.00%
Transfer taxes accrued in connection with the Offering | $	$ 6.6
Number of consolidated properties located in Southern California | Property	11
Maximum percentage of total revenue provided by any single tenant	10.00%	10.00%
Total Revenue | Southern California
Commitment And Contingencies [Line Items]
Percentage of total revenue provided by properties	28.70%
Total Revenue | Hawaii
Commitment And Contingencies [Line Items]
Percentage of total revenue provided by properties	21.70%
Rental Income
Commitment And Contingencies [Line Items]
Percentage of total revenue provided by properties	8.70%
Number of tenants that comprise 8.7% of total annualized based rent | Customer	3
Total Revenues | Retail industry
Commitment And Contingencies [Line Items]
Percentage of total revenue provided by properties	35.80%	37.00%
Total Revenues | Office industry
Commitment And Contingencies [Line Items]
Percentage of total revenue provided by properties	35.40%	35.60%
Base Rent | salesforce.com, inc.
Commitment And Contingencies [Line Items]
Percentage of total revenue provided by properties	7.90%
Alamo Quarry Market and Waikele Center | Total Revenue
Commitment And Contingencies [Line Items]
Percentage of total revenue provided by properties	15.00%	15.60%
Maximum | Tenants
Commitment And Contingencies [Line Items]
Percentage of total revenue provided by properties	2.00%
Maximum | Del Monte Center | Ground Water Contamination
Commitment And Contingencies [Line Items]
Environmental remediation monitoring period	7 years
Minimum | Del Monte Center | Ground Water Contamination
Commitment And Contingencies [Line Items]
Environmental remediation monitoring period	5 years
The Land Mark at One Market
Commitment And Contingencies [Line Items]
Number of lease extension options | OptionPlan	2
Years, lease extension options length	5 years
Quicksilver
Commitment And Contingencies [Line Items]
Percent annual lease amount increase	3.40%
Waikiki Beach Walk - Retail
Commitment And Contingencies [Line Items]
Property management fee, percent	3.00%
Outrigger Hotels
Commitment And Contingencies [Line Items]
Property management fee, percent	6.00%
Number of calendar months termination fee is based	2 months
Maximum percentage of hotel's fiscal year gross revenues paid for aggregate yearly management fee	3.50%
Previous months of management fees	12 months
Hotel management agreement default penalty factor of previous twelve months of management fees in first 11 years of term	8
Years in hotel management agreement term	11 years
Hotel management agreement default penalty factor of previous twelve months of management fees in twelfth year of term	4
Hotel management agreement default penalty factor of previous twelve months of management fees in thirteenth year of term	3
Hotel management agreement default penalty factor of previous twelve months of management fees in fourteenth year of term	2
Hotel management agreement default penalty factor of previous twelve months of management fees in fifteenth year of term	1
Outrigger Hotels | Year of Agreement, 12th
Commitment And Contingencies [Line Items]
Years in hotel management agreement term	15 years
Outrigger Hotels | Year of Agreement, 13th
Commitment And Contingencies [Line Items]
Years in hotel management agreement term	14 years
Outrigger Hotels | Year of Agreement, 14th
Commitment And Contingencies [Line Items]
Years in hotel management agreement term	13 years
Outrigger Hotels | Year of Agreement, 15th
Commitment And Contingencies [Line Items]
Years in hotel management agreement term	12 years
Outrigger Hotels | Maximum
Commitment And Contingencies [Line Items]
Property management fee, percent	3.00%
Wbw Hotel Lessee Llc
Commitment And Contingencies [Line Items]
Years of contract	20 years
Percentage of hotel occupancy gross revenue paid for program fee	4.00%
Wbw Hotel Lessee Llc | Future Time Period Prior to 12-31-2021
Commitment And Contingencies [Line Items]
Percentage of hotel occupancy gross revenue paid for franchise royalty fee	4.00%
Wbw Hotel Lessee Llc | Future Time Period After 12-31-2021
Commitment And Contingencies [Line Items]
Percentage of hotel occupancy gross revenue paid for franchise royalty fee	5.00%

Commitments and Contingencies C

Commitments and Contingencies Current Minimum Annual Payments under Leases (Details) - USD ($)		Jun. 30, 2021	Feb. 28, 2017	Dec. 31, 2015
Operating Leased Assets [Line Items]
2,016				$ 2,096,000
2,017	[1]			3,097,000
2,018				3,167,000
2,019				3,240,000
2,020				3,315,000
Thereafter	[2]			28,176,000
Total				$ 43,091,000
Scenario, Forecast | Waikiki Beach Walk
Operating Leased Assets [Line Items]
Stated monthly lease rate			$ 61,690
Scenario, Forecast | The Land Mark at One Market
Operating Leased Assets [Line Items]
Stated monthly lease rate		$ 217,744
[1]	Lease payments on the Waikiki Beach Walk lease will be equal to fair rental value from March 2017 through the end of the lease term. In the table, we have shown the lease payments for this period based on the stated rate for the month of February 2017 of $61,690.
[2]	Lease payments on The Landmark at One Market lease will be equal to fair rental value from July 2021 through the end of the options lease term. In the table, we have shown the option lease payments for this period based on the stated rate for the month of June 2021 of $217,744.

Operating Leases (Details)

Operating Leases (Details)	12 Months Ended
	Dec. 31, 2015StatePropertymo
Operating Leased Assets [Line Items]
Number of states where retail, office and mixed-use properties are located | State	5
Number of office, retail, and multifamily operating leases	23
Years, minimum term range of office and retail leases	3 years
Years, maximum term range of office and retail leases	10 years
Months, minimum term of apartment leases	7 months
Months, maximum term of apartment leases	15 months
Future minimum rentals term, maximum | mo	12
Retail Or Office
Operating Leased Assets [Line Items]
Number of office, retail, and multifamily operating leases	804
Residential Property
Operating Leased Assets [Line Items]
Number of office, retail, and multifamily operating leases	1,038

Operating Leases Minimum Future

Operating Leases Minimum Future Rentals from Noncancelable Operating Leases (Details) $ in Thousands	Dec. 31, 2015USD ($)
Leases, Operating [Abstract]
2,016	$ 167,417
2,017	156,368
2,018	123,262
2,019	87,738
2,020	65,087
Thereafter	181,245
Total	$ 781,117

Component of Rental Income an75

Component of Rental Income and Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Leases, Income Statement, Lease Revenue [Abstract]
Recognition of straight-line rents	$ 2.7	$ 1.9	$ 2.6
Recognition of amortization of above and below market leases	$ 2.9	$ 2.8	$ 2.4

Component of Rental Income an76

Component of Rental Income and Expense Components of Rental Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Rental Income [Line Items]
Cost reimbursement	$ 30,796	$ 29,052	$ 27,583
Percentage rent	2,834	3,107	2,655
Hotel revenue	38,191	33,911	35,137
Other	1,492	1,681	1,688
Total rental income	261,887	246,078	242,757
Total Retail
Rental Income [Line Items]
Minimum rents	72,999	70,573	69,374
Total Office
Rental Income [Line Items]
Minimum rents	87,125	82,018	81,845
Total Multifamily
Rental Income [Line Items]
Minimum rents	18,137	15,732	14,926
Total Mixed-Use
Rental Income [Line Items]
Minimum rents	$ 10,313	$ 10,004	$ 9,549

Component of Rental Income an77

Component of Rental Income and Expense Components of Rental Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Leases, Income Statement, Lease Revenue [Abstract]
Rental operating	$ 27,611	$ 26,371	$ 26,028
Hotel operating	23,112	21,488	22,115
Repairs and maintenance	11,503	10,600	10,514
Marketing	2,104	1,623	1,547
Rent	2,511	2,452	2,442
Hawaii excise tax	4,408	3,981	4,153
Management fees	1,938	1,752	1,809
Total rental expenses	$ 73,187	$ 68,267	$ 68,608

Other Income (Expenses) (Detail

Other Income (Expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Income and Expenses [Abstract]
Interest and investment income	$ 90	$ 155	$ 148
Income tax expense	(295)	(460)	(645)
Other non-operating income	108	746	10
Total other income (expense)	$ (97)	$ 441	$ (487)

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 09, 2015	Sep. 12, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jul. 01, 2015	Jul. 01, 2014
Related Party Transaction [Line Items]
Total rental income			$ 261,887	$ 246,078	$ 242,757
Investment in WBW CHP LLC, in percentage			47.70%
WBW CHP LLC
Related Party Transaction [Line Items]
Recovered reimbursements of operating expenses of WBW CHP LLC			$ 1,000	$ 1,100	$ 1,100
Common Stock
Related Party Transaction [Line Items]
Common shares issued (in shares)			1,812,451	3,110,067	741,452
AAI Aviation, Inc. | Board of Directors Chairman
Related Party Transaction [Line Items]
Aviation expense			$ 200	$ 100	$ 100
Explorer Insurance Company | Private Placement | Board of Directors Chairman
Related Party Transaction [Line Items]
Common shares issued (in shares)	200,000
Share price (in dollars per share)	$ 40.54
Gross proceeds from issuance of common stock	$ 8,100
ICW Plaza | Board of Directors Chairman
Related Party Transaction [Line Items]
Total rental income			$ 2,200	$ 2,200	$ 2,200
Prepaid Insurance						$ 200	$ 400
Percentage of ownership interests classified as noncontrolling			33.60%
ICW Plaza | Common Stock | Board of Directors Chairman
Related Party Transaction [Line Items]
Percentage of ownership interests classified as noncontrolling			10.10%
ICW Plaza | Member Units | Board of Directors Chairman
Related Party Transaction [Line Items]
Percentage of ownership interests classified as noncontrolling			23.50%
ICW Plaza | Private Placement | Board of Directors Chairman
Related Party Transaction [Line Items]
Common shares issued (in shares)		400,000
Share price (in dollars per share)		$ 33.76
Gross proceeds from issuance of common stock		$ 13,500

Segment Reporting (Details)

Segment Reporting (Details)	12 Months Ended
	Dec. 31, 2015SegmentRoom
Segment Reporting [Abstract]
Number of operating segments | Segment	4
Room in mixed-use segment all-suite hotel | Room	369

Segment Reporting Operating Act

Segment Reporting Operating Activity Within Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Operating income (loss)	$ 23,893	$ 23,510	$ 23,504	$ 23,244	$ 22,526	$ 23,036	$ 17,726	$ 20,381	$ 94,151	$ 83,669	$ 81,101
Total segments' profit									177,617	168,769	165,071
Total Retail
Segment Reporting Information [Line Items]
Property revenue									98,795	96,140	93,449
Property expense									(25,672)	(25,451)	(23,900)
Operating income (loss)									73,123	70,689	69,549
Total Office
Segment Reporting Information [Line Items]
Property revenue									97,651	92,474	90,527
Property expense									(28,843)	(27,003)	(26,688)
Operating income (loss)									68,808	65,471	63,839
Total Multifamily
Segment Reporting Information [Line Items]
Property revenue									19,455	16,976	16,125
Property expense									(8,334)	(6,099)	(5,917)
Operating income (loss)									11,121	10,877	10,208
Total Mixed-Use
Segment Reporting Information [Line Items]
Property revenue									59,722	54,410	54,956
Property expense									(35,157)	(32,678)	(33,481)
Operating income (loss)									$ 24,565	$ 21,732	$ 21,475

Segment Reporting Reconciliatio

Segment Reporting Reconciliation of Segment Profit to Net Income Attributable to Stockholders (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting [Abstract]
Total segments' profit									$ 177,617	$ 168,769	$ 165,071
General and administrative									(20,074)	(18,532)	(17,195)
Depreciation and amortization									(63,392)	(66,568)	(66,775)
Interest expense									47,260	52,965	58,020
Gain on sale of real estate									7,121	0	0
Other income (expense), net									(97)	441	(487)
Net income	$ 11,226	$ 19,026	$ 12,284	$ 11,379	$ 10,046	$ 9,090	$ 5,351	$ 6,658	53,915	31,145	22,594
Net income attributable to restricted shares	(53)	(32)	(40)	(43)	(115)	(95)	(94)	(70)	(168)	(374)	(536)
Net income attributable to unitholders in the Operating Partnership	(2,961)	(5,432)	(3,536)	(3,309)	(2,907)	(2,578)	(1,544)	(1,986)	(15,238)	(9,015)	(6,838)
Net income attributable to American Assets Trust, L.P. unit holders	$ 8,212	$ 13,562	$ 8,708	$ 8,027	$ 7,024	$ 6,417	$ 3,713	$ 4,602	$ 38,509	$ 21,756	$ 15,220

Segment Reporting Net Real Esta

Segment Reporting Net Real Estate and Secured Note Payable Balances for Each Segment (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net Real Estate		$ 1,834,862	$ 1,775,400
Secured Notes Payable	[1]	584,002	819,983
Capital Expenditures and Leasing Commissions	[2]	138,635	149,772
Total Retail
Segment Reporting Information [Line Items]
Net Real Estate		638,893	639,456
Secured Notes Payable		60,065	161,975
Capital Expenditures and Leasing Commissions		7,393	8,671
Total Office
Segment Reporting Information [Line Items]
Net Real Estate		796,773	757,854
Secured Notes Payable		292,183	426,254
Capital Expenditures and Leasing Commissions		49,049	34,577
Total Multifamily
Segment Reporting Information [Line Items]
Net Real Estate		208,730	182,468
Secured Notes Payable		101,444	101,444
Capital Expenditures and Leasing Commissions		81,559	101,392
Total Mixed-Use
Segment Reporting Information [Line Items]
Net Real Estate		190,466	195,622
Secured Notes Payable		130,310	130,310
Capital Expenditures and Leasing Commissions		$ 634	$ 5,132
[1]	Excludes unamortized fair market value adjustment of $4.3 million and $7.2 million as of December 31, 2015 and 2014, respectively.
[2]	Capital expenditures represent cash paid for capital expenditures during the year and includes leasing commissions paid.

Quarterly Financial Informati84

Quarterly Financial Information (Unaudited) Selected Quarterly Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information [Line Items]
Total revenue	$ 71,530	$ 71,289	$ 66,769	$ 66,035	$ 66,478	$ 67,343	$ 62,199	$ 63,980	$ 275,623	$ 260,000	$ 255,057
Operating income (loss)	23,893	23,510	23,504	23,244	22,526	23,036	17,726	20,381	94,151	83,669	81,101
Net income	11,226	19,026	12,284	11,379	10,046	9,090	5,351	6,658	53,915	31,145	22,594
Net income attributable to restricted shares	(53)	(32)	(40)	(43)	(115)	(95)	(94)	(70)	(168)	(374)	(536)
Net income attributable to unitholders in the Operating Partnership	(2,961)	(5,432)	(3,536)	(3,309)	(2,907)	(2,578)	(1,544)	(1,986)	(15,238)	(9,015)	(6,838)
Net income attributable to American Assets Trust, L.P. unit holders	$ 8,212	$ 13,562	$ 8,708	$ 8,027	$ 7,024	$ 6,417	$ 3,713	$ 4,602	38,509	21,756	15,220
Net income attributable to common stockholders - basic and diluted (in dollars per share)	$ 0.18	$ 0.30	$ 0.20	$ 0.18	$ 0.16	$ 0.15	$ 0.09	$ 0.11
American Assets Trust, L.P.
Quarterly Financial Information [Line Items]
Total revenue	$ 71,530	$ 71,289	$ 66,769	$ 66,035	$ 66,478	$ 67,343	$ 62,199	$ 63,980	275,623	260,000	255,057
Operating income (loss)	23,893	23,510	23,504	23,244	22,526	23,036	17,726	20,381	94,151	83,669	81,101
Net income	11,226	19,026	12,284	11,379	10,046	9,090	5,351	6,658	53,915	31,145	22,594
Net income attributable to restricted shares	(53)	(32)	(40)	(43)	(115)	(95)	(94)	(70)	(168)	(374)	(536)
Net income attributable to American Assets Trust, L.P. unit holders									$ 53,747	$ 30,771	$ 22,058
Net income attributable to American Assets Trust, L.P. unit holders	$ 11,173	$ 18,994	$ 12,244	$ 11,336	$ 9,931	$ 8,995	$ 5,257	$ 6,588
Net income attributable to common stockholders - basic and diluted (in dollars per share)	$ 0.18	$ 0.30	$ 0.20	$ 0.18	$ 0.16	$ 0.15	$ 0.09	$ 0.11

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	Mar. 01, 2016	Jan. 29, 2016	Dec. 31, 2015	Aug. 19, 2014
Interest Rate Swap | Designated as Hedging Instrument | Cash Flow Hedging | Subsequent Event
Subsequent Event [Line Items]
Notional amount		$ 100,000,000
Fixed interest rate on derivative		1.4485%
American Assets Trust, L.P. | Subsequent Event | Scenario, Forecast | Term Loan
Subsequent Event [Line Items]
Number of year amortization schedule	7 years
American Assets Trust, L.P. | Interest Rate Swap
Subsequent Event [Line Items]
Term of derivative contract			7 years
Notional amount				$ 150,000,000
Fixed interest rate on derivative			3.08%	2.1305%
American Assets Trust, L.P. | Interest Rate Swap | Subsequent Event
Subsequent Event [Line Items]
Term of derivative contract		7 years
American Assets Trust, L.P. | Interest Rate Swap | Designated as Hedging Instrument | Cash Flow Hedging
Subsequent Event [Line Items]
Effective date			Jan. 9, 2014
Notional amount			$ 100,000,000
Maturity date			Jan. 9, 2019
Fixed interest rate on derivative			3.08%
American Assets Trust, L.P. | Interest Rate Swap | Designated as Hedging Instrument | Cash Flow Hedging | Subsequent Event
Subsequent Event [Line Items]
Effective date		Mar. 1, 2016
Maturity date		Mar. 1, 2023

SCHEDULE III-Consolidated Rea86

SCHEDULE III-Consolidated Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 584,002
Initial Cost, Land	453,567
Initial Cost, Building and Improvements	1,191,344
Cost Capitalized Subsequent to Acquisition	601,117
Gross Carrying Amount, Land	490,494
Gross Carrying Amount, Building and Improvements	1,755,534
Accumulated Depreciation and Amortization	(411,166)		$ (361,424)	$ (318,581)	$ (270,494)
The Aggregate tax basis for Federal tax purposes		$ 1,600,000
Alamo Quarry Market
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	0
Initial Cost, Land	26,396
Initial Cost, Building and Improvements	109,294
Cost Capitalized Subsequent to Acquisition	13,181
Gross Carrying Amount, Land	26,816
Gross Carrying Amount, Building and Improvements	122,055
Accumulated Depreciation and Amortization	$ (45,920)
Year Built/ Renovated	1997/1999
Date Acquired	Dec. 9, 2003
Life on which depreciation in latest income statements is computed	35 years
Carmel Country Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	4,200
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	11,759
Gross Carrying Amount, Land	4,200
Gross Carrying Amount, Building and Improvements	11,759
Accumulated Depreciation and Amortization	$ (7,210)
Year Built/ Renovated	1,991
Date Acquired	Jan. 10, 1989
Life on which depreciation in latest income statements is computed	35 years
Carmel Mountain Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	22,477
Initial Cost, Building and Improvements	65,217
Cost Capitalized Subsequent to Acquisition	26,896
Gross Carrying Amount, Land	31,035
Gross Carrying Amount, Building and Improvements	83,555
Accumulated Depreciation and Amortization	$ (31,794)
Year Built/ Renovated	1994/2014
Date Acquired	Mar. 28, 2003
Life on which depreciation in latest income statements is computed	35 years
Del Monte Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	27,412
Initial Cost, Building and Improvements	87,570
Cost Capitalized Subsequent to Acquisition	22,949
Gross Carrying Amount, Land	27,117
Gross Carrying Amount, Building and Improvements	110,814
Accumulated Depreciation and Amortization	$ (49,887)
Year Built/ Renovated	1967/1984/2006
Date Acquired	Apr. 8, 2004
Life on which depreciation in latest income statements is computed	35 years
Geary Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	8,239
Initial Cost, Building and Improvements	12,353
Cost Capitalized Subsequent to Acquisition	165
Gross Carrying Amount, Land	8,238
Gross Carrying Amount, Building and Improvements	12,519
Accumulated Depreciation and Amortization	$ (1,222)
Year Built/ Renovated	2,012
Date Acquired	Dec. 19, 2012
Life on which depreciation in latest income statements is computed	35 years
Lomas Santa Fe Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	8,600
Initial Cost, Building and Improvements	11,282
Cost Capitalized Subsequent to Acquisition	11,873
Gross Carrying Amount, Land	8,620
Gross Carrying Amount, Building and Improvements	23,135
Accumulated Depreciation and Amortization	$ (13,874)
Year Built/ Renovated	1972/1997
Date Acquired	Jun. 12, 1995
Life on which depreciation in latest income statements is computed	35 years
The Shops at Kalakaua
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	13,993
Initial Cost, Building and Improvements	10,817
Cost Capitalized Subsequent to Acquisition	100
Gross Carrying Amount, Land	14,006
Gross Carrying Amount, Building and Improvements	10,904
Accumulated Depreciation and Amortization	$ (3,576)
Year Built/ Renovated	1971/2006
Date Acquired	Mar. 31, 2005
Life on which depreciation in latest income statements is computed	35 years
Solana Beach Towne Centre
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 37,065
Initial Cost, Land	40,980
Initial Cost, Building and Improvements	38,842
Cost Capitalized Subsequent to Acquisition	2,175
Gross Carrying Amount, Land	40,980
Gross Carrying Amount, Building and Improvements	41,017
Accumulated Depreciation and Amortization	$ (6,652)
Year Built/ Renovated	1973/2000/2004
Date Acquired	Jan. 19, 2011
Life on which depreciation in latest income statements is computed	35 years
South Bay Marketplace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 23,000
Initial Cost, Land	4,401
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	10,774
Gross Carrying Amount, Land	4,401
Gross Carrying Amount, Building and Improvements	10,774
Accumulated Depreciation and Amortization	$ (6,396)
Year Built/ Renovated	1,997
Date Acquired	Sep. 16, 1995
Life on which depreciation in latest income statements is computed	35 years
Waikele Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	55,593
Initial Cost, Building and Improvements	126,858
Cost Capitalized Subsequent to Acquisition	59,449
Gross Carrying Amount, Land	70,643
Gross Carrying Amount, Building and Improvements	171,257
Accumulated Depreciation and Amortization	$ (56,553)
Year Built/ Renovated	1993/2008
Date Acquired	Sep. 16, 2004
Life on which depreciation in latest income statements is computed	35 years
City Center Bellevue
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 111,000
Initial Cost, Land	25,135
Initial Cost, Building and Improvements	190,998
Cost Capitalized Subsequent to Acquisition	16,889
Gross Carrying Amount, Land	25,135
Gross Carrying Amount, Building and Improvements	207,887
Accumulated Depreciation and Amortization	$ (22,444)
Year Built/ Renovated	1,987
Date Acquired	Aug. 21, 2012
Life on which depreciation in latest income statements is computed	40 years
First & Main
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 84,500
Initial Cost, Land	14,697
Initial Cost, Building and Improvements	109,739
Cost Capitalized Subsequent to Acquisition	5,704
Gross Carrying Amount, Land	14,697
Gross Carrying Amount, Building and Improvements	115,443
Accumulated Depreciation and Amortization	$ (17,262)
Year Built/ Renovated	2,010
Date Acquired	Mar. 11, 2011
Life on which depreciation in latest income statements is computed	40 years
The Land Mark at One Market
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	34,575
Initial Cost, Building and Improvements	141,196
Cost Capitalized Subsequent to Acquisition	7,817
Gross Carrying Amount, Land	34,575
Gross Carrying Amount, Building and Improvements	149,013
Accumulated Depreciation and Amortization	$ (25,437)
Year Built/ Renovated	1917/2000
Date Acquired	Jun. 30, 2010
Life on which depreciation in latest income statements is computed	40 years
Lloyd District Portfolio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	18,660
Initial Cost, Building and Improvements	61,401
Cost Capitalized Subsequent to Acquisition	62,580
Gross Carrying Amount, Land	12,461
Gross Carrying Amount, Building and Improvements	130,180
Accumulated Depreciation and Amortization	$ (12,360)
Year Built/ Renovated	1940-2011/present
Date Acquired	Jul. 1, 2011
Life on which depreciation in latest income statements is computed	40 years
One Beach Street
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 21,900
Initial Cost, Land	15,332
Initial Cost, Building and Improvements	18,017
Cost Capitalized Subsequent to Acquisition	2,349
Gross Carrying Amount, Land	15,332
Gross Carrying Amount, Building and Improvements	20,366
Accumulated Depreciation and Amortization	$ (2,666)
Year Built/ Renovated	1924/1972/1987/1992
Date Acquired	Jan. 24, 2012
Life on which depreciation in latest income statements is computed	40 years
Solana Beach Corporate Centre I-II
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 11,119
Initial Cost, Land	7,111
Initial Cost, Building and Improvements	17,100
Cost Capitalized Subsequent to Acquisition	3,616
Gross Carrying Amount, Land	7,111
Gross Carrying Amount, Building and Improvements	20,716
Accumulated Depreciation and Amortization	$ (3,235)
Year Built/ Renovated	1982/2005
Date Acquired	Jan. 19, 2011
Life on which depreciation in latest income statements is computed	40 years
Solana Beach Corporate Centre III-IV
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 35,920
Initial Cost, Land	7,298
Initial Cost, Building and Improvements	27,887
Cost Capitalized Subsequent to Acquisition	1,896
Gross Carrying Amount, Land	7,298
Gross Carrying Amount, Building and Improvements	29,783
Accumulated Depreciation and Amortization	$ (4,763)
Year Built/ Renovated	1982/2005
Date Acquired	Jan. 19, 2011
Life on which depreciation in latest income statements is computed	40 years
Solana Beach Corporate Centre Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	487
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	60
Gross Carrying Amount, Land	547
Gross Carrying Amount, Building and Improvements	0
Accumulated Depreciation and Amortization	$ 0
Year Built/ Renovated	N/A
Date Acquired	Jan. 19, 2011
ICW Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	4,095
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	41,128
Gross Carrying Amount, Land	5,408
Gross Carrying Amount, Building and Improvements	39,815
Accumulated Depreciation and Amortization	$ (11,998)
Year Built/ Renovated	1996-1997/2014
Date Acquired	Jun. 6, 1989
Life on which depreciation in latest income statements is computed	40 years
Pacific North Court
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 20,749
Initial Cost, Land	3,263
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	21,217
Gross Carrying Amount, Land	4,309
Gross Carrying Amount, Building and Improvements	20,171
Accumulated Depreciation and Amortization	$ (9,592)
Year Built/ Renovated	1997-1998
Date Acquired	Jun. 6, 1989
Life on which depreciation in latest income statements is computed	40 years
Pacific South Court
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	3,285
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	32,054
Gross Carrying Amount, Land	4,226
Gross Carrying Amount, Building and Improvements	31,113
Accumulated Depreciation and Amortization	$ (10,927)
Year Built/ Renovated	1996-1997
Date Acquired	Jun. 6, 1989
Life on which depreciation in latest income statements is computed	40 years
Pacific VC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 6,995
Initial Cost, Land	1,413
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	8,251
Gross Carrying Amount, Land	2,148
Gross Carrying Amount, Building and Improvements	7,516
Accumulated Depreciation and Amortization	$ (4,252)
Year Built/ Renovated	1998/2000
Date Acquired	Jun. 6, 1989
Life on which depreciation in latest income statements is computed	40 years
Pacific Torrey Daycare
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	715
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	1,685
Gross Carrying Amount, Land	911
Gross Carrying Amount, Building and Improvements	1,489
Accumulated Depreciation and Amortization	$ (801)
Year Built/ Renovated	1996-1997
Date Acquired	Jun. 6, 1989
Life on which depreciation in latest income statements is computed	40 years
Torrey Reserve Building 6
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	7,945
Gross Carrying Amount, Land	682
Gross Carrying Amount, Building and Improvements	7,263
Accumulated Depreciation and Amortization	$ (588)
Year Built/ Renovated	2,013
Date Acquired	Jun. 6, 1989
Life on which depreciation in latest income statements is computed	40 years
Torrey Reserve Building 5
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	3,468
Gross Carrying Amount, Land	1,017
Gross Carrying Amount, Building and Improvements	2,451
Accumulated Depreciation and Amortization	$ (31)
Year Built/ Renovated	2,015
Date Acquired	Jun. 6, 1989
Life on which depreciation in latest income statements is computed	40 years
Torrey Reserve Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	229
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	11,266
Gross Carrying Amount, Land	2,188
Gross Carrying Amount, Building and Improvements	9,307
Accumulated Depreciation and Amortization	$ 0
Year Built/ Renovated	2014-present
Date Acquired	Jun. 6, 1989
Imperial Beach Gardens
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 20,000
Initial Cost, Land	1,281
Initial Cost, Building and Improvements	4,820
Cost Capitalized Subsequent to Acquisition	4,400
Gross Carrying Amount, Land	1,281
Gross Carrying Amount, Building and Improvements	9,220
Accumulated Depreciation and Amortization	$ (7,793)
Year Built/ Renovated	1959/2008
Date Acquired	Jul. 31, 1985
Life on which depreciation in latest income statements is computed	30 years
Loma Palisades
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 73,744
Initial Cost, Land	14,000
Initial Cost, Building and Improvements	16,570
Cost Capitalized Subsequent to Acquisition	18,539
Gross Carrying Amount, Land	14,051
Gross Carrying Amount, Building and Improvements	35,058
Accumulated Depreciation and Amortization	$ (24,954)
Year Built/ Renovated	1958/2001-2008
Date Acquired	Jul. 20, 1990
Life on which depreciation in latest income statements is computed	30 years
Mariner's Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 7,700
Initial Cost, Land	2,744
Initial Cost, Building and Improvements	4,540
Cost Capitalized Subsequent to Acquisition	1,234
Gross Carrying Amount, Land	2,744
Gross Carrying Amount, Building and Improvements	5,774
Accumulated Depreciation and Amortization	$ (2,712)
Year Built/ Renovated	1,986
Date Acquired	May 9, 2001
Life on which depreciation in latest income statements is computed	30 years
Santa Fe Park Rv Resort
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	401
Initial Cost, Building and Improvements	928
Cost Capitalized Subsequent to Acquisition	824
Gross Carrying Amount, Land	401
Gross Carrying Amount, Building and Improvements	1,752
Accumulated Depreciation and Amortization	$ (1,430)
Year Built/ Renovated	1971/2007-2008
Date Acquired	Jun. 1, 1979
Life on which depreciation in latest income statements is computed	30 years
Hassalo on Eighth - Residential
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	0
Initial Cost, Building and Improvements	0
Cost Capitalized Subsequent to Acquisition	177,074
Gross Carrying Amount, Land	6,220
Gross Carrying Amount, Building and Improvements	170,854
Accumulated Depreciation and Amortization	$ (1,738)
Year Built/ Renovated	2,015
Date Acquired	Jul. 1, 2011
Life on which depreciation in latest income statements is computed	30 years
Waikiki Beach Walk - Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 130,310
Initial Cost, Land	45,995
Initial Cost, Building and Improvements	74,943
Cost Capitalized Subsequent to Acquisition	209
Gross Carrying Amount, Land	45,995
Gross Carrying Amount, Building and Improvements	75,152
Accumulated Depreciation and Amortization	$ (11,690)
Year Built/ Renovated	2,006
Date Acquired	Jan. 19, 2011
Life on which depreciation in latest income statements is computed	35 years
Waikiki Beach Walk Hotel
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	30,640
Initial Cost, Building and Improvements	60,029
Cost Capitalized Subsequent to Acquisition	595
Gross Carrying Amount, Land	30,640
Gross Carrying Amount, Building and Improvements	60,624
Accumulated Depreciation and Amortization	$ (10,256)
Year Built/ Renovated	2008/2014
Date Acquired	Jan. 19, 2011
Life on which depreciation in latest income statements is computed	35 years
Solana Beach Highway 101 Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	7,847
Initial Cost, Building and Improvements	202
Cost Capitalized Subsequent to Acquisition	867
Gross Carrying Amount, Land	8,916
Gross Carrying Amount, Building and Improvements	0
Accumulated Depreciation and Amortization	$ (189)
Year Built/ Renovated	N/A
Date Acquired	Sep. 20, 2011
Torrey Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance as of December 31, 2015	$ 0
Initial Cost, Land	2,073
Initial Cost, Building and Improvements	741
Cost Capitalized Subsequent to Acquisition	10,129
Gross Carrying Amount, Land	6,145
Gross Carrying Amount, Building and Improvements	6,798
Accumulated Depreciation and Amortization	$ (964)
Year Built/ Renovated	N/A
Date Acquired	May 9, 1997

SCHEDULE III-Consolidated Rea87

SCHEDULE III-Consolidated Real Estate and Accumulated Depreciation Rollforward (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2012
Real estate assets
Balance, beginning of period		$ 2,136,824	$ 1,995,417
Improvements		119,719	154,594	$ 60,677
Cost of Real Estate Sold		(7,396)	0	0
Other	[1]	(3,119)	(13,187)	(3,936)
Balance, end of period		2,246,028	2,136,824	1,938,676
Accumulated depreciation
Balance, beginning of period		361,424	318,581
Additions-depreciation		54,534	55,159	51,949
Cost of Real Estate Sold		(2,334)	0	0
Other	[1]	(2,458)	(12,316)	(3,862)
Balance, end of period		$ 411,166	$ 361,424	$ 270,494
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