Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES
Net (loss) income	$ (691)	$ 10,308
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Deferred rent revenue and amortization of lease intangibles	47	(1,007)
Depreciation and amortization	33,279	17,986
Amortization of debt issuance costs and debt fair value adjustments	446	1,716
Stock-based compensation expense	727	639
Settlement of derivative instruments	0	10,430
Other noncash interest expense	(320)	(145)
Other, net	2,031	796
Changes in operating assets and liabilities
Change in accounts receivable	577	1,726
Change in other assets	(337)	(1,038)
Change in accounts payable and accrued expenses	5,434	5,834
Change in security deposits payable	2,113	81
Change in other liabilities and deferred credits	666	279
Net cash provided by operating activities	43,972	47,605
INVESTING ACTIVITIES
Capital expenditures	(10,138)	(7,253)
Leasing commissions	(1,227)	(902)
Deposit on property acquisition	0	(5,000)
Net cash used in investing activities	(11,365)	(13,155)
FINANCING ACTIVITIES
Repayment of secured notes payable	(74,116)	(130,795)
Proceeds from unsecured line of credit	35,000	0
Repayment of unsecured line of credit	0	(20,000)
Proceeds from unsecured notes payable	0	250,000
Debt issuance costs	(2,656)	(1,812)
Proceeds from issuance of common stock, net	(176)
Proceeds from issuance of common stock, net		30,075
Dividends paid to common stock and unitholders	(17,388)	(16,723)
Net cash provided by (used in) financing activities	(59,336)	110,745
Net (decrease) increase in cash and cash equivalents	(26,729)	145,195
Cash, cash equivalents, and restricted cash equivalents, beginning of period	91,954	54,751
Cash, cash equivalents, and restricted cash equivalents, end of period	65,225	199,946
Cash and cash equivalents	55,336	190,110
Restricted cash	9,889	9,836
American Assets Trust, L.P.
OPERATING ACTIVITIES
Net (loss) income	(691)	10,308
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Deferred rent revenue and amortization of lease intangibles	47	(1,007)
Depreciation and amortization	33,279	17,986
Amortization of debt issuance costs and debt fair value adjustments	446	1,716
Stock-based compensation expense	727	639
Settlement of derivative instruments	0	10,430
Other noncash interest expense	(320)	(145)
Other, net	2,031	796
Changes in operating assets and liabilities
Change in accounts receivable	577	1,726
Change in other assets	(337)	(1,038)
Change in accounts payable and accrued expenses	5,434	5,834
Change in security deposits payable	2,113	81
Change in other liabilities and deferred credits	666	279
Net cash provided by operating activities	43,972	47,605
INVESTING ACTIVITIES
Capital expenditures	(10,138)	(7,253)
Leasing commissions	(1,227)	(902)
Deposit on property acquisition	0	(5,000)
Net cash used in investing activities	(11,365)	(13,155)
FINANCING ACTIVITIES
Repayment of secured notes payable	(74,116)	(130,795)
Proceeds from unsecured line of credit	35,000	0
Repayment of unsecured line of credit	0	(20,000)
Proceeds from unsecured notes payable	0	250,000
Debt issuance costs	(2,656)	(1,812)
Proceeds from issuance of common stock, net	(176)
Contributions from American Assets Trust, Inc.		30,075
Dividends paid to common stock and unitholders	(17,388)	(16,723)
Net cash provided by (used in) financing activities	(59,336)	110,745
Net (decrease) increase in cash and cash equivalents	(26,729)	145,195
Cash, cash equivalents, and restricted cash equivalents, beginning of period	91,954	54,751
Cash, cash equivalents, and restricted cash equivalents, end of period	65,225	199,946
Cash and cash equivalents	55,336	190,110
Restricted cash	$ 9,889	$ 9,836