Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES
Net income	$ 26,115,000	$ 31,800,000
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred rent revenue and amortization of lease intangibles	(13,536,000)	(20,025,000)
Depreciation and amortization	85,827,000	80,869,000
Amortization of debt issuance costs and debt discounts	1,734,000	1,109,000
Early extinguishment of debt	4,271,000	0
Provision for uncollectable rental income	(934,000)	10,803,000
Stock-based compensation expense	4,452,000	3,753,000
Unrealized loss on hedging activities	0	551,000
Other noncash interest expense	(824,000)	(997,000)
Other, net	(927,000)	(3,208,000)
Changes in operating assets and liabilities
Change in accounts receivable	941,000	(7,502,000)
Change in other assets	225,000	1,453,000
Change in accounts payable and accrued expenses	20,589,000	13,787,000
Change in security deposits payable	584,000	(1,787,000)
Change in other liabilities and deferred credits	1,115,000	(1,457,000)
Net cash provided by operating activities	129,632,000	109,149,000
INVESTING ACTIVITIES
Acquisition of real estate	(204,511,000)	0
Capital expenditures	(56,772,000)	(48,690,000)
Leasing commissions	(2,025,000)	(4,884,000)
Purchases of marketable securities	(47,760,000)	0
Proceeds from the sale of marketable securities	47,723,000	0
Net cash used in investing activities	(263,345,000)	(53,574,000)
FINANCING ACTIVITIES
Repayment of secured notes payable	0	(51,003,000)
Proceeds from unsecured line of credit	0	100,000,000
Repayment of unsecured line of credit	(100,000,000)	0
Proceeds from unsecured notes payable	494,675,000	0
Repayments of Unsecured Debt	(155,375,000)	0
Debt issuance costs	(5,075,000)	0
Proceeds from issuance of common stock, net	0	(119,000)
Dividends paid to common stock and unitholders	(65,922,000)	(57,346,000)
Net cash provided by (used in) financing activities	168,303,000	(8,468,000)
Net increase in cash and cash equivalents	34,590,000	47,107,000
Cash, cash equivalents and restricted cash, beginning of period	139,049,000	109,451,000
Cash, cash equivalents and restricted cash, end of period	173,639,000	156,558,000
Cash and cash equivalents	171,923,000	155,327,000
Restricted cash	1,716,000	1,231,000
American Assets Trust, L.P.
OPERATING ACTIVITIES
Net income	26,115,000	31,800,000
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred rent revenue and amortization of lease intangibles	(13,536,000)	(20,025,000)
Depreciation and amortization	85,827,000	80,869,000
Amortization of debt issuance costs and debt discounts	1,734,000	1,109,000
Early extinguishment of debt	4,271,000	0
Provision for uncollectable rental income	(934,000)	10,803,000
Stock-based compensation expense	4,452,000	3,753,000
Unrealized loss on hedging activities	0	551,000
Other noncash interest expense	(824,000)	(997,000)
Other, net	(927,000)	(3,208,000)
Changes in operating assets and liabilities
Change in accounts receivable	941,000	(7,502,000)
Change in other assets	225,000	1,453,000
Change in accounts payable and accrued expenses	20,589,000	13,787,000
Change in security deposits payable	584,000	(1,787,000)
Change in other liabilities and deferred credits	1,115,000	(1,457,000)
Net cash provided by operating activities	129,632,000	109,149,000
INVESTING ACTIVITIES
Acquisition of real estate	(204,511,000)	0
Capital expenditures	(56,772,000)	(48,690,000)
Leasing commissions	(2,025,000)	(4,884,000)
Purchases of marketable securities	(47,760,000)	0
Proceeds from the sale of marketable securities	47,723,000	0
Net cash used in investing activities	(263,345,000)	(53,574,000)
FINANCING ACTIVITIES
Repayment of secured notes payable	0	(51,003,000)
Proceeds from unsecured line of credit	0	100,000,000
Repayment of unsecured line of credit	(100,000,000)	0
Proceeds from unsecured notes payable	494,675,000	0
Repayments of Unsecured Debt	(155,375,000)	0
Debt issuance costs	(5,075,000)	0
Contributions from American Assets Trust, Inc.	0	(119,000)
Dividends paid to common stock and unitholders	(65,922,000)	(57,346,000)
Net cash provided by (used in) financing activities	168,303,000	(8,468,000)
Net increase in cash and cash equivalents	34,590,000	47,107,000
Cash, cash equivalents and restricted cash, beginning of period	139,049,000	109,451,000
Cash, cash equivalents and restricted cash, end of period	173,639,000	156,558,000
Cash and cash equivalents	171,923,000	155,327,000
Restricted cash	$ 1,716,000	$ 1,231,000