PS Business Parks (PSBXP) 10-K 22 Feb 22 2021 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 18, 2022	Jun. 30, 2021
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2021
Document Fiscal Year Focus	2021
Document Transition Report	false
Entity File Number	1-10709
Entity Registrant Name	PS BUSINESS PARKS, INC./MD
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	95-4300881
Entity Address, Address Line One	701 Western Avenue
Entity Address, City or Town	Glendale
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91201-2349
City Area Code	818
Local Phone Number	244-8080
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2,967,153,632
Entity Common Stock, Shares Outstanding		27,606,127
Documents Incorporated by Reference	Portions of the definitive proxy statement to be filed in connection with the Annual Meeting of Stockholders to be held in 2022 are incorporated by reference into Part III of this Annual Report on Form 10-K.
Amendment Flag	false
Document Fiscal Period Focus	FY
Entity Central Index Key	0000866368
Auditor Firm ID	42
Auditor Name	Ernst & Young LLP
Auditor Location	Los Angeles, California
Common Stock [Member]
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	PSB
Security Exchange Name	NYSE
Series X Preferred Stock [Member]
Title of 12(b) Security	Depositary Shares Each Representing 1/1,000 of a 5.250% Cum Pref Stock, Series X, $0.01 par value
Trading Symbol	PSBPrX
Security Exchange Name	NYSE
Series Y Preferred Stock [Member]
Title of 12(b) Security	Depositary Shares Each Representing 1/1,000 of a 5.200% Cum Pref Stock, Series Y, $0.01 par value
Trading Symbol	PSBPrY
Security Exchange Name	NYSE
Series Z Preferred Stock [Member]
Title of 12(b) Security	Depositary Shares Each Representing 1/1,000 of a 4.875% Cum Pref Stock, Series Z, $0.01 par value
Trading Symbol	PSBPrZ
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents	$ 27,074	$ 69,083
Real estate facilities, at cost
Land	867,345	843,765
Buildings and improvements	2,239,137	2,080,895
Gross real estate investment property	3,106,482	2,924,660
Accumulated depreciation	(1,178,397)	(1,101,739)
Net real estate investment property	1,928,085	1,822,921
Properties held for sale, net	33,609	75,138
Land and building held for development, net	78,990	37,922
Total real estate investments	2,040,684	1,935,981
Rent receivable	1,621	1,519
Deferred rent receivable	37,581	36,788
Other assets	16,262	14,334
Total assets	2,123,222	2,057,705
LIABILITIES AND EQUITY
Accrued and other liabilities	97,151	82,065
Credit facility	32,000
Total liabilities	129,151	82,065
Commitments and contingencies
PS Business Parks, Inc.'s stockholders' equity
Preferred stock, $0.01 par value, 50,000,000 shares authorized, 30,200 and 37,790 shares issued and outstanding at December 31, 2021 and December 31, 2020, respectively	755,000	944,750
Common stock, $0.01 par value, 100,000,000 shares authorized, 27,589,807 and 27,488,547 shares issued and outstanding at December 31, 2021 and December 31, 2020, respectively	275	274
Paid-in capital	752,444	738,022
Accumulated earnings	226,737	73,631
Total PS Business Parks, Inc.'s stockholders' equity	1,734,456	1,756,677
Noncontrolling interests	259,615	218,963
Total equity	1,994,071	1,975,640
Total liabilities and equity	$ 2,123,222	$ 2,057,705

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Consolidated Balance Sheets [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	30,200	37,790
Preferred stock, shares outstanding	30,200	37,790
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	27,589,807	27,488,547
Common Stock, Shares, Outstanding	27,589,807	27,488,547

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements Of Income [Abstract]
Rental income	$ 438,703	$ 415,623	$ 429,846
Expenses
Cost of operations	130,896	125,513	128,343
Depreciation and amortization	93,486	96,314	104,249
General and administrative	19,057	14,526	13,761
Total operating expenses	243,439	236,353	246,353
Interest and other income	2,536	1,234	4,492
Interest and other expense	(4,646)	(1,072)	(657)
Gain on sale of real estate facilities	359,875	27,273	16,644
Net income	553,029	206,705	203,972
Allocation to noncontrolling interests	(104,270)	(33,158)	(29,006)
Net income allocable to PS Business Parks, Inc.	448,759	173,547	174,966
Allocation to preferred stockholders based upon Distributions	(46,624)	(48,186)	(54,346)
Preferred securities redemption charge (Note 9)	(6,434)		(11,007)
Allocation to restricted stock unit holders	(2,613)	(716)	(910)
Net income allocable to common stockholders	$ 393,088	$ 124,645	$ 108,703
Net income per share of common stock
Basic	$ 14.28	$ 4.54	$ 3.96
Diluted	$ 14.22	$ 4.52	$ 3.95
Weighted average common stock outstanding
Basic	27,534	27,475	27,418
Diluted	27,636	27,563	27,526

Consolidated Statements Of Equi

Consolidated Statements Of Equity - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Paid-In Capital [Member]	Accumulated Earnings [Member]	Total PS Business Parks, Inc.'s Stockholders' Equity [Member]	Noncontrolling Interests [Member]	Total
Balances at Dec. 31, 2018	$ 959,750	$ 274	$ 736,131	$ 69,207	$ 1,765,362	$ 218,091	$ 1,983,453
Balances, shares at Dec. 31, 2018	38,390	27,362,101
Issuance of preferred stock, net of issuance costs	$ 325,000		(8,962)		316,038		316,038
Issuance of preferred stock, net of issuance costs, shares	13,000
Redemption of preferred stock, net of issuance costs	$ (340,000)		11,007	(11,007)	(340,000)		(340,000)
Redemption of preferred stock, net of issuance costs, shares	(13,600)
Issuance of common stock in connection with stock-based compensation			969		969		969
Issuance of common stock in connection with stock-based compensation, shares		78,852
Stock-based compensation, net			4,046		4,046		4,046
Cash paid for taxes in lieu of stock upon vesting of restricted stock units			(6,350)		(6,350)		(6,350)
Net income				174,966	174,966	29,006	203,972
Distributions
Preferred stock (Note 9)				(54,346)	(54,346)		(54,346)
Common stock				(115,154)	(115,154)		(115,154)
Noncontrolling interests—Common Units						(30,683)	(30,683)
Noncontrolling interests—Joint venture						(134)	(134)
Adjustment to noncontrolling interests-common units in the OP			145		145	(145)
Balances at Dec. 31, 2019	$ 944,750	$ 274	736,986	63,666	1,745,676	216,135	1,961,811
Balances, shares at Dec. 31, 2019	37,790	27,440,953
Issuance of common stock in connection with stock-based compensation			258		258		258
Issuance of common stock in connection with stock-based compensation, shares		47,594
Stock-based compensation, net			4,994		4,994		4,994
Cash paid for taxes in lieu of stock upon vesting of restricted stock units			(4,216)		(4,216)		(4,216)
Capital contribution from non controlling interests - joint venture (Note 4)						493	493
Net income				173,547	173,547	33,158	206,705
Distributions
Preferred stock (Note 9)				(48,186)	(48,186)		(48,186)
Common stock				(115,396)	(115,396)		(115,396)
Noncontrolling interests—Common Units						(30,683)	(30,683)
Noncontrolling interests—Joint venture						(140)	(140)
Balances at Dec. 31, 2020	$ 944,750	$ 274	738,022	73,631	1,756,677	218,963	1,975,640
Balances, shares at Dec. 31, 2020	37,790	27,488,547
Redemption of preferred stock, net of issuance costs	$ (189,750)		6,434	(6,434)	(189,750)		(189,750)
Redemption of preferred stock, net of issuance costs, shares	(7,590)
Issuance of common stock in connection with stock-based compensation		$ 1	5,011		5,012		5,012
Issuance of common stock in connection with stock-based compensation, shares		101,260
Stock-based compensation, net			7,022		7,022		7,022
Cash paid for taxes in lieu of stock upon vesting of restricted stock units			(3,940)		(3,940)		(3,940)
Capital contribution from non controlling interests - joint venture (Note 4)						746	746
Issuance costs			(105)		(105)		(105)
Net income				448,759	448,759	104,270	553,029
Distributions
Preferred stock (Note 9)				(46,624)	(46,624)		(46,624)
Common stock				(242,595)	(242,595)		(242,595)
Noncontrolling interests—Common Units						(64,287)	(64,287)
Noncontrolling interests—Joint venture						(77)	(77)
Balances at Dec. 31, 2021	$ 755,000	$ 275	$ 752,444	$ 226,737	$ 1,734,456	$ 259,615	$ 1,994,071
Balances, shares at Dec. 31, 2021	30,200	27,589,807

Consolidated Statements Of Eq_2

Consolidated Statements Of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements Of Equity [Abstract]
Common stock, distributions per share	$ 8.80	$ 4.20	$ 4.20

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income	$ 553,029	$ 206,705	$ 203,972
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization expense	93,486	96,314	104,249
Straight-line rent and amortization of lease intangibles, net	(2,800)	(4,713)	(3,936)
Gain on sale of real estate facilities	(359,875)	(27,273)	(16,644)
Stock compensation expense	8,495	5,648	4,956
Amortization of financing costs	725	548	544
Other, net	9,177	(254)	(2,546)
Total adjustments	(250,792)	70,270	86,623
Net cash provided by operating activities	302,237	276,975	290,595
Cash flows from investing activities
Capital expenditures to real estate facilities	(37,840)	(36,062)	(39,365)
Capital expenditures to land and building held for development, net	(46,047)	(16,412)	(5,278)
Acquisition of real estate facilities	(147,702)	(60,019)	(134,278)
Proceeds from sale of real estate facilities	400,955	40,674	144,599
Net cash provided by (used in) investing activities	169,366	(71,819)	(34,322)
Cash flows from financing activities
Proceeds from borrowings on credit facility	32,000		70,000
Repayment of borrowings on credit facility			(70,000)
Payment of deferred financing costs	(2,248)
Payment of financing costs	(246)	(335)	(296)
Proceeds from the exercise of stock options	5,012	258	969
Payment of issuance costs	(105)
Cash paid for taxes in lieu of stock upon vesting of restricted stock units	(3,940)	(4,216)	(6,350)
Redemption of preferred stock	(189,750)		(340,000)
Net proceeds from the issuance of preferred stock			316,038
Capital contribution from noncontrolling interests—joint venture	746	493
Cash paid to restricted stock unit holders	(1,498)	(654)	(910)
Distributions paid to preferred stockholders	(46,624)	(48,186)	(54,346)
Distributions paid to common stockholders	(242,595)	(115,396)	(115,154)
Distributions paid to noncontrolling interests-common units	(64,287)	(30,683)	(30,683)
Distributions paid to noncontrolling interests-joint venture	(77)	(140)	(134)
Net cash used in financing activities	(513,612)	(198,859)	(230,866)
Net increase (decrease) in cash and cash equivalents	(42,009)	6,297	25,407
Cash, cash equivalents and restricted cash at the beginning of the period	70,171	63,874	38,467
Cash, cash equivalents and restricted cash at the end of the period	28,162	70,171	63,874
Supplemental disclosures
Interest paid			67
Adjustment to noncontrolling interests-common units in the OP
Noncontrolling interests-common units			(145)
Paid-in capital			145
Preferred redemption allocation
Paid-in capital	6,434		11,007
Accumulated earnings	(6,434)		$ (11,007)
Accrued capital expenditures to land and building held for development
Land and building held for development, net	5,746	1,698
Accrued and other liabilities	$ (5,746)	$ (1,698)

Organization And Description Of

Organization And Description Of Business	12 Months Ended
	Dec. 31, 2021
Organization And Description Of Business [Abstract]
Organization And Description Of Business	1. Organization and description of business Organization PS Business Parks, Inc. (“PSB”), a Maryland corporation, was organized in 1990. Effective May 19, 2021, following approval by its common and preferred stockholders, PSB reincorporated from the state of California to the state of Maryland. As of December 31, 2021, PSB owned 79.1% of the common partnership units of PS Business Parks, L.P. (the “OP”). The remaining common partnership units are owned by Public Storage (“PS”). PS’s interest in the OP is referred to as the “PS OP Interests.” PSB, as the sole general partner of the OP, has full, exclusive, and complete responsibility and discretion in managing and controlling the OP. PSB and its subsidiaries, including the OP and its consolidated joint ventures, are collectively referred to as the “Company,” “we,” “us,” or “our.” PS also owns 7.2 million shares of common stock and would own 41.4% (or 14.5 million shares) of the outstanding shares of the Company’s common stock if it redeemed its common partnership units for shares of common stock. Description of business The Company is a fully-integrated, self-advised and self-managed real estate investment trust (“REIT”) that owns, operates, acquires, and develops commercial properties, primarily multi-tenant industrial, industrial-flex and low-rise suburban office space. As of December 31, 2021, the Company owned and operated 27.7 million rentable square feet of commercial space in six states comprising 97 parks and 666 buildings. The Company also held a 95.0% interest in a joint venture entity which owns Highgate at The Mile, a 395-unit multifamily apartment complex located in Tysons, Virginia, and a 98.2% interest in a joint venture formed to develop Brentford at The Mile, a planned 411-unit multifamily apartment complex also located in Tysons, Virginia. The Company also manages for a fee approximately 0.3 million rentable square feet on behalf of PS. References herein to the number of properties, parks, apartment units or square footage are unaudited and outside the scope of the Company’s independent registered public accounting firm’s review of the Company’s consolidated financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States).

Basis Of Presentation And Summa

Basis Of Presentation And Summary Of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Basis Of Presentation And Summary Of Significant Accounting Policies	2. Basis of presentation and summary of significant accounting policies Basis of presentation The accompanying consolidated financial statements include the accounts of PSB and its subsidiaries, including the OP and its consolidated joint ventures. All significant inter-company balances and transactions have been eliminated in the consolidated financial statements. The financial statements are presented on an accrual basis in accordance with U.S. generally accepted accounting principles (“GAAP”). Consolidation and equity method of accounting We consider entities to be Variable Interest Entities (“VIEs”) when they have insufficient equity to finance their activities without additional subordinated financial support provided by other parties, or the equity holders as a group do not have a controlling financial interest. A limited partnership is also generally considered a VIE if the limited partners do not participate in operating decisions. We consolidate VIEs when we are the primary beneficiary, generally defined as having (i) the power to direct the activities most significantly impacting economic performance and (ii) either the obligation to absorb losses or the right to receive benefits from the VIE. We account for investments in entities that are not VIEs that we have significant influence over, but do not control, using the equity method of accounting and for investment in entities that we control, we consolidate. We do not consider the joint venture entity that owns Highgate at The Mile a VIE, but we consolidate the entity as the Company has control over the joint venture. See Note 3 for more information relating to this joint venture arrangement. We have a 98.2% interest in Brentford at The Mile, a planned 411-unit multifamily apartment complex (the “Brentford Joint Venture”). An unrelated real estate development company (the “JV Partner”) holds the remaining 1.8% interest. Based on management’s analysis of the joint venture and certain related agreements, we determined Brentford Joint Venture is a VIE because (a) Brentford Joint Venture does not have sufficient equity at risk to finance its activities without additional subordinated financial support from other parties, and (b) there are no substantive kick-out rights. We have also concluded we have control over the Brentford Joint Venture as we (a) are the managing member of the Brentford Joint Venture, (b) have designated decision making power to direct the activities that most significantly affect the economic performance of the Brentford Joint Venture, and (c) have a 98.2% economic interest in the investment. Thus, we determined that we are the primary beneficiary of Brentford Joint Venture. As such, we consolidate the Brentford Joint Venture, and the related land and development costs of $59.9 million and $15.1 million were included in land and building held for development, net on our consolidated balance sheets as of December 31, 2021 and 2020, respectively. The assets of the Brentford Joint Venture may only be used to settle obligations of the Brentford Joint Venture and the creditors of the Brentford Joint Venture have no recourse to the general credit of the Company. See Note 4 for more information relating to this joint venture arrangement. PS, the sole limited partner in the OP, has no power to direct the activities of the OP. PSB is the primary beneficiary and has control over the OP as it has the exclusive responsibility under the Operating Partnership Agreement to manage and conduct the business of the OP. Accordingly, we consider the OP a VIE and consolidate it. Substantially all of our assets and liabilities are held by the OP. Noncontrolling interests Noncontrolling interests represent (i) PS’s noncontrolling interest in the OP through its ownership of 7,305,355 common partnership units, (ii) the JV Partner’s 5.0% interest in our consolidated joint venture that owns Highgate at The Mile, and (iii) the JV Partner’s 1.8% interest in our consolidated joint venture formed to develop Brentford at The Mile. See Note 7 for further information on noncontrolling interests. Use of estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates. Financial instruments The methods and assumptions used to estimate the fair value of financial instruments are described below. The Company has estimated the fair value of financial instruments using available market information and appropriate valuation methodologies. Considerable judgment is required in interpreting market data to develop estimates of market value. Accordingly, estimated fair values are not necessarily indicative of the amounts that could be realized in current market exchanges. The Company determines the estimated fair value of financial assets and liabilities utilizing a hierarchy of valuation techniques based on whether the inputs to a fair value measurement are considered to be observable or unobservable in a marketplace. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect market assumptions. This hierarchy requires the use of observable market data when available. The following is the fair value hierarchy: Level 1—quoted prices for identical instruments in active markets; Level 2—quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and Level 3—fair value measurements derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. Financial assets that are exposed to credit risk consist primarily of cash equivalents and receivables. The Company considers all highly liquid investments with a remaining maturity of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents, which consist primarily of money market investments, are only invested in entities with an investment grade rating. Receivables are balances due from various customers. Balances that the Company expects to become uncollectible are written off. Due to the short period to maturity of the Company’s cash and cash equivalents, accounts receivable, other assets and accrued and other liabilities, the carrying values as presented on the consolidated balance sheets are reasonable estimates of fair value. Carrying values of the Company’s Credit Facility (as defined in Note 6) approximate fair value. The characteristics of the Credit Facility, market data and other comparative metrics utilized in determining these fair values are “Level 2” inputs. The following table provides a reconciliation of cash, cash equivalents and restricted cash per the consolidated statements of cash flow to the corresponding financial statement line items in the consolidated balance sheets as of December 31, 2021, 2020, and 2019 (in thousands): For the Years Ended December 31, 2021 2020 2019Consolidated balance sheets Cash and cash equivalents $ 27,074  $ 69,083  $ 62,786 Restricted cash included in Land and building held for development, net (1) 1,088  1,088  1,088 Cash, cash equivalents and restricted cash at the end of the period $ 28,162  $ 70,171  $ 63,874 ____________________________(1)In conjunction with seeking entitlements to develop our multifamily projects in Tysons, Virginia, we contributed $1.1 million into an escrow account for the future development of an athletic field. This amount is reflected in the table above as restricted cash included in land and building held for development, net. Intangible assets/liabilities When we acquire real estate facilities, an intangible asset is recorded in other assets for leases where the in-place rent is higher than market rents, and an intangible liability is recorded in other liabilities where the market rents are higher than the in-place rents. The amounts recorded are based upon the present value (using a discount rate which reflects the risks associated with the leases acquired) of such differences over the lease term and such amounts are amortized to rental income over the respective remaining lease term. As of December 31, 2021, the value of above-market in-place rents resulted in net intangible assets of $0.6 million, net of $11.6 million of accumulated amortization, and the value of below-market in-place rents resulted in net intangible liabilities of $2.8 million, net of $13.1 million of accumulated amortization. As of December 31, 2020, the value of above-market in-place rents resulted in net intangible assets of $1.2 million, net of $11.1 million of accumulated amortization, and the value of below-market in-place rents resulted in net intangible liabilities of $2.2 million, net of $12.2 million of accumulated amortization. Additionally, when we acquire real estate facilities, the value of in-place lease intangible (i.e., customer lease-up costs) is recorded in other assets and is amortized to depreciation and amortization expense over the respective remaining lease term. As of December 31, 2021, the value of acquired in-place leases resulted in net intangible assets of $6.0 million, net of $10.5 million of accumulated amortization. As of December 31, 2020, the value of acquired in-place leases resulted in net intangible assets of $5.3 million, net of $7.2 million of accumulated amortization. As of December 31, 2021, the value of our right-of-use (“ROU”) assets relating to our existing ground lease arrangements, included in “other assets” on our consolidated balance sheets and the corresponding liability included under “accrued and other liabilities,” was $1.3 million, net of $0.3 million of accumulated amortization. As of December 31, 2020, the value of our ROU assets and related liability relating to our ground lease arrangements was $1.5 million, net of $0.2 million of accumulated amortization. The ground leases expire in 2029 and 2030 and do not have options to extend. As of December 31, 2021, the remaining lease terms were 7.8 years and 8.1 years. Lease expense for these ground leases is recognized in the period the applicable costs are incurred, and the monthly lease amount for these operating leases is constant and without contractual increases throughout the remaining terms. ‎ Real estate facilities Real estate facilities are recorded at cost. Property taxes, insurance, interest, and costs essential to the development of property for its intended use are capitalized during the period of development. Direct costs related to the renovation or improvement of the properties are capitalized. Expenditures for repairs and maintenance are expensed as incurred. Expenditures that are expected to provide benefit for a period greater than two years are capitalized and depreciated over their estimated useful life. Buildings and improvements are depreciated using the straight-line method over their estimated useful lives, which generally range from five to 30 years. Transaction costs, which include tenant improvements and lease commissions, for leases with terms greater than one year are capitalized and depreciated over the corresponding lease term. Property held for development Property is classified as held for development when it is no longer used in its original form and it will be developed to an alternate use. Property held for development is not depreciated. Property held for sale Property is classified as held for sale when all of the following criteria for a plan of sale have been met: (i) management, having the authority to approve the action, commits to a plan to sell the property; (ii) the property is available for immediate sale in its present condition, subject only to terms that are usual and customary; (iii) an active program to locate a buyer and other actions required to complete the plan to sell have been initiated; (iv) the sale of the property is probable and is expected to be completed within one year; (v) the property is being actively marketed for sale at a price that is reasonable in relation to its current fair value; and (vi) actions necessary to complete the plan of sale indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Depreciation of assets ceases upon designation of a property as held for sale. If the disposal of a property represents a strategic shift that has (or will have) a major effect on our operations or financial results, such as (i) a major line of business, (ii) a major geographic area, (iii) a major equity method investment, or (iv) other major parts of an entity, then the operations of the property, including any interest expense directly attributable to it, are classified as discontinued operations in our consolidated statements of operations, and amounts for all prior periods presented are reclassified from continuing operations to discontinued operations. The disposal of an individual property generally will not represent a strategic shift and therefore will typically not meet the criteria for classification as a discontinued operation. Sales of real estate facilities Sales of real estate facilities are not part of our ordinary activities, and as a result, we consider such sales as contracts with non-customers. We recognize sales of real estate when we have collected payment and the attributes of ownership, such as possession and control of the asset, have been transferred to the buyer. If a contract for sale includes obligations to provide goods or services to the buyer, an allocated portion of the contract price is recognized as revenue as the related goods or services are transferred to the buyer.   Evaluation of asset impairment We evaluate our real estate and finite-lived intangible assets for impairment each quarter. We review current activities and changes in the business conditions of all of our long-lived assets to determine the existence of any triggering events or impairment indicators requiring an impairment analysis. If triggering events or impairment indicators are identified, we review an estimate of the future undiscounted cash flows, including, if necessary, a probability-weighted approach if multiple outcomes are under consideration. ‎ Upon determination that an impairment has occurred, a write-down is recognized to reduce the carrying amount of the asset to its estimated fair value. If an impairment charge is not required to be recognized, the recognition of depreciation or amortization is adjusted prospectively, as necessary, to reduce the carrying amount of the asset to its estimated disposition value over the remaining period that the asset is expected to be held and used. We may adjust depreciation of properties that are expected to be disposed of or redeveloped prior to the end of their useful lives. No impairment charges were recorded in any period presented herein. Asset impairment due to casualty loss It is our policy to record losses due to physical damages during the accounting period in which they occur, while the amount of monetary assets to be received from the insurance policy, if any, is recognized when receipt of insurance recoveries is probable. Losses, which are reduced by the related probable insurance recoveries, are recorded as costs of operations on the consolidated statements of income. Anticipated proceeds in excess of recognized losses would be considered a gain contingency and recognized when the contingency related to the insurance claim has been resolved. Anticipated recoveries for lost rental income due to property damages are also considered to be a gain contingency and recognized when the contingency related to the insurance claim has been resolved. No material casualty losses were incurred in any period presented herein. Stock-based compensation Stock-based payments to employees, including grants of employee stock options, are recognized as stock compensation expense in the Company’s consolidated statements of income based on their grant date fair values, except for performance-based grants, which are accounted for based on their fair values at the beginning of the service period. See Note 10. Accrued and other liabilities Accrued and other liabilities consist primarily of rents prepaid by our customers, trade payables, property tax accruals, accrued payroll and contingent loss accruals when probable and estimable, as well as the intangible liabilities discussed above. We disclose the nature of significant losses not accrued that are reasonably possible of occurring and, if estimable, a range of exposure. The fair value of accrued and other liabilities approximate book value due to the short period until settlement. Other assets Other assets are comprised primarily of prepaid expenses, as well as the intangible assets discussed above. Revenue recognition We recognize the aggregate rent to be collected (including the impact of escalators and concessions) under leases ratably throughout the non-cancellable lease term on a “straight-line” basis, commencing when the customer takes control of the leased space. Cumulative straight-line rent recognized in excess of amounts billed per the lease term is presented as “deferred rent receivable” on our consolidated balance sheets. The Company presents reimbursements from customers for real estate taxes and other recoverable operating expenses under a single lease component presentation as the timing and pattern of transfer of such reimbursements are the same as base rent, and the combined single component of such leases are classified as operating leases. Accordingly, the Company recognizes such variable lease payments resulting from the reimbursements from customers for real estate taxes and other recoverable operating expenses as rental income in the period the applicable costs are incurred. Property management fees are recognized in the period earned as other income. ‎ The Company monitors the collectability of its receivable balances, including deferred rent receivable balances, on an ongoing basis. The Company writes off uncollectible customer receivable balances, including deferred rent receivable balances, as a reduction to rental income in the period such balances are no longer probable of being collected. Therefore, recognition of rental income is limited to the lesser of the amount of cash collected or rental income reflected on a “straight-line” basis, plus any accruable variable lease payments for those customer receivable balances. The Company wrote-off accounts receivable, net of recoveries of $0.1 million, $1.6 million, and $1.1 million, respectively, and wrote off deferred rent receivable of $0.3 million, $3.1 million, and $0.5 million, respectively for the year ended December 31, 2021, 2020, and 2019, respectively. The Company recognized revenue from its lease arrangements aggregating to $438.7 million, $415.6 million, and $429.8 million for the years ended December 31, 2021, 2020, and 2019, respectively. This revenue consisted primarily of rental income from operating leases and the related variable lease payments resulting from reimbursements of property operating expenses. Base rental income was $333.9 million, $319.2 million, and $333.3 million for the years ended December 31, 2021, 2020, and 2019, respectively, while variable lease payments, consisting primarily of reimbursement of property operating expenses, were $104.8 million, $96.4 million, and $96.5 million for the years ended December 31, 2021, 2020, and 2019, respectively. During the year ended December 31, 2021 the Company agreed to defer $0.5 million and abate $0.3 million of billed rental income, which was significantly lower than the $5.7 million of rent deferrals and $1.3 million of rent abatements granted during the year ended December 31, 2020. Since the onset of the COVID-19 pandemic, the Company entered into rent relief agreements consisting of $6.2 million of rent deferrals and $1.6 million of rent abatements. As of December 31, 2021, the 317 current customers that received rent relief account for 9.5% of rental income. Also as of December 31, 2021, the Company had collected $5.3 million of rent deferral repayment, representing 99.8% of the amounts scheduled to be repaid through December 2021. An additional $0.9 million of rent deferral repayment is scheduled to be repaid thereafter. The duration and severity of the effects of the COVID-19 pandemic on the economy are uncertain and are likely to impact collectability of certain customers’ rent receivable balances in the future. The Company has taken into account the current financial condition of its tenants, including consideration of COVID-19 impacts, in its estimation of its uncollectible accounts and deferred rents receivable at December 31, 2021. The Company is closely monitoring the collectability of such rents and will adjust future estimations as appropriate as further information becomes known. In April 2020, the Financial Accounting Standards Board issued a Staff Question-and-Answer (“Lease Modification Q&A”) to respond to frequently asked questions about accounting for lease concessions related to the coronavirus (“COVID-19”) pandemic. Under existing lease guidance, an entity would have to determine, on a lease by lease basis, if a lease concession contained a lease modification which would be accounted for under the lease modification framework, or if a lease concession was an enforceable right or obligation that existed in the original lease, which would be accounted for outside the lease modification framework. The Lease Modification Q&A provides that, to the extent that cash flow after the lease concessions are substantially the same, or less than, the cash flow previously required by the existing lease, an entity is not required to evaluate each contract to determine whether a concession provided by a lessor to a lessee in response to the COVID-19 pandemic is a lease modification. Instead, an entity can account for such lease concessions either (i) as if they were part of the enforceable rights and obligations of the parties under the existing lease contract; or (ii) as a lease modification. Based on the Lease Modification Q&A, an entity is not required to account for all lease concessions in response to the COVID-19 pandemic under one elected option; however, the entity is required to apply the elected option consistently to leases with similar characteristics and in similar circumstances. In accordance with the Lease Modification Q&A, the Company has elected to account for lease concessions in response to the COVID-19 pandemic as a lease modification if the cash flow after these lease concessions is substantially the same, or less than, the cash flow previously required by the existing lease. The Company records rent deferrals and rent abatements in deferred rent receivable in the accompanying consolidated balance sheets and will recognize these amounts over the remainder of the respective lease terms. For lease concessions in response to the COVID-19 pandemic that modified the terms and substantially changed the underlying cash flow of the existing lease for the remaining term, the Company also accounts for such concessions as a lease modification. ‎ General and administrative expense General and administrative expense includes executive and other compensation, corporate office expenses, professional fees, and other such costs that are not directly related to the operation of our real estate facilities. Income taxes We have elected to be treated as a REIT, as defined in the Internal Revenue Code of 1986, as amended (the “Code”). As a REIT, we do not incur U.S. federal corporate income tax if we distribute all our “REIT taxable income” each year, and if we meet certain organizational and operational requirements. We believe we have met these REIT requirements for all periods presented herein. Accordingly, we have recorded no U.S. federal corporate income tax expense related to our “REIT taxable income.” We recognize tax benefits of uncertain income tax positions that are subject to audit only if we believe it is more likely than not that the position would be sustained assuming the relevant taxing authorities had full knowledge of the relevant facts and circumstances of our positions. As of December 31, 2021 and 2020, we did not recognize any tax benefit for uncertain tax positions. Accounting for preferred equity issuance costs We record preferred equity issuance costs as a reduction to paid-in capital on our consolidated balance sheets at the time the preferred securities are issued and reflect the carrying value of the preferred equity at its redemption value. An additional allocation of income is made from the common stockholders to the preferred stockholders in the amount of the original issuance costs, and we reclassify the redemption value from equity to liabilities, when we call preferred stock for redemption, with such liabilities relieved once the preferred stock is redeemed. Net income per share of common stock Notwithstanding the presentation of income allocations on our consolidated statements of income, net income is allocated to (a) preferred stockholders, for distributions paid or payable, (b) preferred stockholders, to the extent redemption value exceeds the related carrying value (“Preferred Redemption Allocation”), (c) our joint venture partner in proportion to its percentage interest in the joint ventures, to the extent the consolidated joint ventures produce net income or loss during the period and (d) restricted stock unit (“RSU”) holders, for non-forfeitable dividends paid adjusted for participation rights in undistributed earnings. The remaining net income is allocated to the common partnership units and our common stockholders, respectively, based upon the pro-rata aggregate number of units and stock outstanding. Basic and diluted net income per share of common stock are each calculated based upon net income allocable to common stockholders, divided by (i) in the case of basic net income per share of common stock, weighted average common stock and (ii) in the case of diluted net income per share of common stock, weighted average common stock adjusted for the impact of stock compensation awards outstanding (see Note 10) using the treasury stock method. ‎ The following table sets forth the components of our basic and diluted net income per share that are not reflected on the face of our consolidated statements of income, including the allocation of income to common stockholders and common partnership units, the percentage of weighted average common stock and common partnership units outstanding, as well as basic and diluted weighted average common stock outstanding for the years ended December 31, (in thousands): 2021 2020 2019Calculation of net income allocable to common stockholders Net income$ 553,029  $ 206,705  $ 203,972 Net (income) loss allocated to Preferred stockholders based upon distributions (46,624) (48,186) (54,346)Preferred stockholders based upon redemptions (6,434) — (11,007)Noncontrolling interests—joint venture 20  (17) (44)Restricted stock unit holders (2,613) (716) (910)Net income allocable to common stockholders and noncontrolling interests—common units 497,378  157,786  137,665 Net income allocation to noncontrolling interests— common units (104,290) (33,141) (28,962)Net income allocable to common stockholders$ 393,088  $ 124,645  $ 108,703  Calculation of common partnership units as a percentage of common stock equivalents Weighted average common stock outstanding 27,534  27,475  27,418 Weighted average common partnership units outstanding 7,305  7,305  7,305 Total common stock equivalents 34,839  34,780  34,723 Common partnership units as a percentage of common stock equivalents 21.0% 21.0% 21.0% Weighted average common stock outstanding Basic weighted average common stock outstanding 27,534  27,475  27,418 Net effect of dilutive stock compensation—based on treasury stock method using average market price 102  88  108 Diluted weighted average common stock outstanding 27,636  27,563  27,526  Segment reporting The Company has two operating segments: (i) the acquisition, development, ownership, and management of commercial real estate and (ii) the acquisition, development, ownership, and management of multifamily real estate, but has only one reportable segment as the multifamily segment does not meet the quantitative thresholds necessary to require reporting as a separate segment. Reclassifications Certain reclassifications have been made to the consolidated financial statements for 2020 to conform to the 2021 presentation, including reclassifying assets held for sale or sold during 2021 from “real estate facilities, at cost” of $70.0 million and “land and building held for development, net” of $5.1 million as of December 31, 2020 into “properties held for sale, net” of $75.1 million on our consolidated balance sheets. Additionally, we combined all non-cash rental income items into “straight-line rent and amortization of lease intangibles, net” within the operating activities section of our consolidated statements of cash flows for all periods presented herein.‎

Real Estate Facilities

Real Estate Facilities	12 Months Ended
	Dec. 31, 2021
Real Estate Facilities [Abstract]
Real Estate Facilities	3. Real estate facilities Activity related to our real estate facilities for the years ended December 31, 2021, 2020, and 2019 is as follows (in thousands): Buildings and Accumulated Land Improvements Depreciation Total Balances at December 31, 2018$ 725,411  $ 1,973,658  $ (968,680) $ 1,730,389 Acquisition of real estate facilities 88,093  44,313  — 132,406 Capital expenditures — 40,092  — 40,092 Disposals (1) — (15,796) 15,796  —Depreciation and amortization expense — — (93,416) (93,416)Transfer to properties held for sale — (3,796) 10,691  6,895 Balances at December 31, 2019 813,504  2,038,471  (1,035,609) 1,816,366 Acquisition of real estate facilities 30,261  27,168  — 57,429 Capital expenditures — 36,328  — 36,328 Disposals (1) — (19,399) 19,399  —Depreciation and amortization expense — — (90,058) (90,058)Transfer to properties held for sale — (1,673) 4,529  2,856 Balances at December 31, 2020 (2) 843,765  2,080,895  (1,101,739) 1,822,921 Acquisition of real estate facilities 22,591  123,711  — 146,302 Capital expenditures — 37,976  — 37,976 Disposals (1) — (9,892) 9,892  —Depreciation and amortization expense — — (90,175) (90,175)Transfer from property held for development 989  8,063  — 9,052 Transfer to properties held for sale — (1,616) 3,625  2,009 Balances at December 31, 2021$ 867,345  $ 2,239,137  $ (1,178,397) $ 1,928,085 ____________________________(1)Disposals primarily represent the book value of tenant improvements that have been removed upon the customer vacating their space.(2)Land, building and improvements, and accumulated depreciation, respectively, totaling $30.9 million, $166.5 million, and $127.4 million were reclassified as of December 31, 2020 to “properties held for sale, net” representing a 772,000 square foot industrial-flex business park located in Irving, Texas, a 371,000 square foot industrial-flex business park located in San Diego, California, a 244,000 square foot office business park located in Herndon, Virginia, a 198,000 square foot office-oriented flex business park located in Chantilly, Virginia, a 53,000 square foot industrial building located in Beltsville, Maryland, and a 22,000 square foot single-tenant industrial-flex building located in Irving, Texas. We have a 95.0% interest in a joint venture that owns Highgate at The Mile, a 395-unit multifamily apartment complex on a five-acre parcel within The Mile. The remaining 5.0% interest in the joint venture is held by the JV Partner. We consolidate the joint venture that owns Highgate at The Mile and as such, the consolidated real estate assets and activities related to this joint venture are included in the table above. The unaudited December 31, 2021 net federal tax basis of real estate facilities was approximately $1.7 billion. As of December 31, 2021, we have commitments, pursuant to executed leases throughout our portfolio, to spend $9.8 million on transaction costs, which include tenant improvements and lease commissions. Acquisitions We account for acquisitions as asset acquisitions. The purchase price of acquired properties is allocated to land, buildings, and improvements (including tenant improvements, and intangible assets and intangible liabilities (see Note 2), based upon the relative fair value of each component, which are evaluated independently. ‎ The Company must make significant assumptions in determining the fair value of assets acquired and liabilities assumed, which can affect the recognition and timing of revenue and depreciation and amortization expense. The fair value of land is estimated based upon, among other considerations, comparable sales of land within the same region. The fair value of buildings and improvements is determined using a combination of the income and replacement cost approaches which both utilize available market information relevant to the acquired property. The fair value of other acquired assets including tenant improvements and unamortized lease commissions are determined using the replacement cost approach. The amount recorded to acquired in-place lease intangible is also determined utilizing the income approach using market assumptions which are based on management’s assessment of current market conditions and the estimated lease-up periods for the respective spaces. Transaction costs related to asset acquisitions are capitalized. On November 18, 2021, the Company acquired a multi-tenant industrial business park comprising approximately 141,000 rentable square feet in Plano, Texas, for a total purchase price of $25.6 million, inclusive of capitalized transaction costs. On September 1, 2021, the Company acquired a multi-tenant industrial business park comprising approximately 718,000 rentable square feet in Grapevine, Texas, for a total purchase price of $123.3 million, inclusive of capitalized transaction costs. On October 28, 2020, the Company acquired a multi-tenant industrial business park comprising approximately 246,000 rentable square feet in Alexandria, Virginia, for a total purchase price of $46.6 million, inclusive of capitalized transaction costs. On January 10, 2020, the Company acquired a multi-tenant industrial business park comprising approximately 73,000 rentable square feet in La Mirada, California, for a total purchase price of $13.5 million, inclusive of capitalized transaction costs. On December 20, 2019, the Company acquired a multi-tenant industrial-flex business park comprising approximately 79,000 rentable square feet in Santa Clara, California, for a total purchase price of $16.8 million, inclusive of capitalized transaction costs. On September 5, 2019, the Company acquired a multi-tenant industrial business park comprising approximately 543,000 rentable square feet in Santa Fe Springs, California, for a total purchase price of $104.3 million, inclusive of capitalized transaction costs. On April 18, 2019, the Company acquired a multi-tenant industrial business park comprising approximately 74,000 rentable square feet in Signal Hill, California, for a total purchase price of $13.8 million, inclusive of capitalized transaction costs. The following table summarizes assets acquired and liabilities assumed for the years ended December 31, 2021, 2020 and 2019 (in thousands): 2021 2020 2019Land$ 22,591  $ 30,261  $ 88,093 Buildings and improvements 123,711  27,168  44,313 Other assets (above-market in-place rents) — 523  —Accrued and other liabilities (below-market in-place rents) (1,457) (557) (1,241)Other assets (in-place lease intangible) 4,023  2,700  3,777 Total purchase price 148,868  60,095  134,942 Net operating assets acquired and liabilities assumed (1,166) (76) (664)Total cash paid$ 147,702  $ 60,019  $ 134,278  During 2021, we completed the development of an 83,000 square foot shallow-bay industrial building at our Freeport Business Park locatedin Irving, Texas for total development costs of $8.1 million. The total developed asset value, inclusive of land costs, of $9.1 million was placed into service on March 1, 2021 and accordingly was reflected under real estate facilities, at cost on our consolidated balance sheets at December 31, 2021. As of December 31, 2021, we were in the process of developing an approximately 83,000 square foot multi-tenant industrial building at our 212 Business Park located in Kent, Washington. As of December 31, 2021, $2.2 million of the estimated $15.4 million total development costs had been incurred and was reflected under land and building held for development, net on our consolidated balance sheets. This construction project is scheduled to be completed in the fourth quarter of 2022. As of December 31, 2021, we have contractual construction commitments totaling $1.2 million that will be paid to various contractors as the project is completed. As of December 31, 2021, we were in the process of developing an approximately 17,000 square foot multi-tenant industrial building at our Boca Commerce Park, located in Boca Raton, Florida. As of December 31, 2021, $1.1 million of the estimated $4.0 million total development costs had been incurred and was reflected under land and building held for development, net on our consolidated balance sheets. This construction project is scheduled to be completed in the fourth quarter of 2022. As of December 31, 2021, we have contractual construction commitments totaling $2.9 million that will be paid to various contractors as the project is completed. Dispositions On December 30, 2021, the Company sold a 53,000 square foot industrial building located in Beltsville, Maryland, for net sale proceeds of $4.5 million, which resulted in a gain on sale of $3.2 million. On December 29, 2021, the Company sold a 70,000 square foot industrial-flex building located in Irving, Texas, for net sale proceeds of $8.8 million, which resulted in a gain on sale of $6.3 million. On October 19, 2021, we sold a 371,000 square foot industrial-flex business park located in San Diego, California, for net sale proceeds of $311.1 million, which resulted in a gain on sale of $301.3 million. On September 17, 2021, the Company sold a 22,000 square foot industrial-flex building located in Irving, Texas, for net sale proceeds of $3.4 million, which resulted in a gain on sale of $2.9 million. On July 16, 2021, the Company sold a 244,000 square foot office business park located in Herndon, Virginia, for net sale proceeds of $40.5 million, which resulted in a gain on sale of $27.0 million. On June 17, 2021, the Company sold a 198,000 square foot office-oriented flex business park located in Chantilly, Virginia, for net sale proceeds of $32.6 million, which resulted in a gain on sale of $19.2 million. (Collectively the “2021 Assets Sold”). During 2021, the Company reclassified such assets as properties held for sale, net, in the consolidated balance sheet as of December 31, 2020. On September 16, 2020, the Company sold two industrial buildings totaling 40,000 square feet located in Redmond, Washington, which were subject to an eminent domain process for net sale proceeds of $11.4 million, which resulted in a gain on sale of $7.7 million. On January 7, 2020, the Company sold an 113,000 square foot office building located at Metro Park North in Rockville, Maryland, for net sale proceeds of $29.3 million, which resulted in a gain on sale of $19.6 million. (Collectively the “2020 Assets Sold”). On October 8, 2019, the Company sold 1.3 million rentable square feet of industrial-flex and office business parks located in Rockville and Silver Spring, Maryland, for net sale proceeds of $144.6 million, which resulted in a gain on sale of $16.6 million. (Collectively the “2019 Assets Sold”). The Company determined that the 2021 Assets Sold, 2020 Assets Sold, and the 2019 Assets Sold did not meet the criteria for discontinued operations presentation, as the sale of such assets did not represent a strategic shift that will have a major effect on our operations and financial results. ‎

Multifamily Developmental Activ

Multifamily Developmental Activity	12 Months Ended
	Dec. 31, 2021
Multifamily Developmental Activity [Abstract]
Multifamily Developmental Activity	4. Multifamily developmental activity In August 2020, the Company entered the Brentford Joint Venture with the JV Partner for the purpose of developing Brentford at The Mile, a planned 411-unit multifamily apartment complex. Under the Brentford Joint Venture agreement, the Company has a 98.2% controlling interest and is the managing member with the JV Partner holding the remaining 1.8% limited partnership interest. We contributed a parcel of land to the Brentford Joint Venture (the “Brentford Parcel”) at a value of $18.5 million, for which we received equity contribution credit in the Brentford Joint Venture. Our cost basis in the Brentford Parcel was $5.1 million as of December 31, 2021. Construction of Brentford at The Mile commenced in August 2020 and is anticipated to be completed over a period of 24 to 36 months. As of December 31, 2021, the development cost incurred was $54.8 million, which is reflected in land and building held for development, net on our consolidated balance sheets along with our $5.1 million cost basis in the Brentford Parcel. As of December 31, 2021, we have contractual construction commitments totaling $39.3 million that will be paid to various contractors as the project is completed.

Leasing Activity

Leasing Activity	12 Months Ended
	Dec. 31, 2021
Leasing Activity [Abstract]
Leasing Activity	5. Leasing activity The Company leases space in its commercial real estate facilities to customers primarily under non-cancelable leases generally ranging from one to 10 years. Future minimum rental income, excluding recovery of operating expenses that may be collectable under these leases, as of December 31, 2021 is as follows (in thousands): 2022$ 290,712 2023 226,498 2024 160,933 2025 100,741 2026 66,388 Thereafter 107,051 Total (1)$ 952,323 ____________________________(1)Excludes future minimum rental income from assets held for sale as of December 31, 2021. In addition to minimum rental payments, certain customers reimburse the Company for their pro rata share of specified property operating expenses. Such reimbursements amounted to $104.8 million, $96.4 million, and $96.5 million for the years ended December 31, 2021, 2020, and 2019, respectively. These variable lease payment amounts are included as rental income in the accompanying consolidated statements of income. Leases accounting for 2.5% of total leased square footage are subject to termination options, of which 1.6% have termination options exercisable through December 31, 2022 (unaudited). In general, these leases provide for termination payments to us should the termination options be exercised. Certain leases also have an option to extend the term of the lease. The future minimum rental income in the above table assumes termination options and lease extension options are not exercised.

Bank Loans

Bank Loans	12 Months Ended
	Dec. 31, 2021
Bank Loans [Abstract]
Bank Loans	6. Bank loans In August 2021, the Company amended and restated the credit agreement (the “Amended Credit Agreement”) governing its unsecured revolving line of credit (the “Credit Facility”) with Wells Fargo Bank, National Association (“Wells Fargo”), as administrative agent, and the other lenders party thereto. The Amended Credit Agreement increased the aggregate principal amount of the Credit Facility from $250.0 million to $400.0 million, and extended the maturity date to August 24, 2025, with two six-month extension options or one 12-month extension option. The per annum rate of interest charged on borrowings is based on London Inter-bank Offered Rate (“LIBOR”) plus 0.70% to LIBOR plus 1.35%. Currently, the Company’s rate under the Credit Facility is LIBOR plus 0.70% per annum. In addition, the Company is required to pay an annual facility fee ranging from 0.10% to 0.25% per annum calculated on the aggregate committed amount of the Credit Facility (currently 0.10% per annum). The interest rate margin and facility fee may increase in the future based on the ratio of the Company’s total consolidated indebtedness to its consolidated gross asset value defined in accordance with the Amended Credit Agreement. The Credit Facility also features a sustainability-linked pricing component whereby the pricing can improve by 0.01%, if the Company meets certain sustainability performance targets, and an accordion feature whereby it has an option to increase commitments under the Credit Facility up to an additional $300.0 million. The Company had a $32.0 million balance outstanding, at an interest rate of 0.8%, on its Credit Facility at December 31, 2021 and a zero balance outstanding on its Credit Facility at December 31, 2020. Subsequent to December 31, 2021, the Company repaid in full the balance outstanding as of December 31, 2021. In connection with the Amended Credit Agreement, the Company paid $2.2 million of loan origination costs. The Company had $2.1 million and $0.2 million of total unamortized loan origination costs as of December 31, 2021 and 2020, respectively, which is included in other assets in the accompanying consolidated balance sheets. The Credit Facility requires the Company to meet certain covenants, all of which it was in compliance with at December 31, 2021. Interest on outstanding borrowings is payable monthly.

Noncontrolling Interests

Noncontrolling Interests	12 Months Ended
	Dec. 31, 2021
Noncontrolling Interests [Abstract]
Noncontrolling Interests	7. Noncontrolling interests Noncontrolling interests represent (i) PS’s noncontrolling interest in the OP through its ownership of 7,305,355 common partnership units, totaling $255.7 million and $215.7 million at December 31, 2021 and 2020, respectively, and (ii) the JV Partner’s interests in our consolidated joint ventures, totaling $3.9 million and $3.3 million at December 31, 2021 and 2020, respectively. PS OP Interests Each common partnership unit receives a cash distribution equal to the dividend paid on our common stock and is redeemable at PS’s option. For the year ended December 31, 2021, the Company paid a one-time special cash dividend of $4.60 per share (the “Special Cash Dividend”) along with the fourth quarter regular dividend of $1.05 per share. PS received the same distribution as holders of our common stock. If PS exercises its right of redemption, at PSB’s option (a) PS will receive one share of common stock from us for each common partnership unit redeemed, or (b) PS will receive cash from us for each common partnership unit redeemed generally equal to the market value of a share of common stock (as defined in the Operating Partnership Agreement). We can prevent redemptions that we believe would violate either our articles of incorporation or securities laws, cause PSB to no longer qualify as a REIT, or could result in the OP no longer being treated as a partnership for U.S. federal tax purposes. In allocating net income and presenting equity, we treat the common partnership units as if converted to shares of common stock. Accordingly, they received the same net income allocation per unit as a share of common stock totaling $104.3 million, $33.1 million, and $29.0 million for the years ended December 31, 2021, 2020, and 2019, respectively. JV Partner During the years ended December 31, 2021, 2020 and 2019, the Company recorded capital contributions of $0.7 million, $0.5 million, and $0.0, respectively, from the JV Partner related to its noncontrolling interest in the Brentford Joint Venture.‎

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2021
Related Party Transactions [Abstract]
Related Party Transactions	8. Related party transactions We manage certain industrial, office and retail facilities in the United States for PS under either the “Public Storage” or “PS Business Parks” names (the “PS Management Agreement”). Under PS’s supervision, we coordinate and assist in rental and marketing activities, property maintenance and other operational activities, including the selection of vendors, suppliers, employees, and independent contractors. We receive a management fee based upon a percentage of revenues, which is included in interest and other income on our consolidated statements of income. Management fee revenues were $0.3 million for each of the years ended December 31, 2021, 2020, and 2019. We allocate certain operating expenses to PS related to the management of these properties, including payroll and other business expenses, totaling $0.3 million, $0.4 million, and $0.4 million for the years ended December 31, 2021, 2020, and 2019, respectively. The PS Business Parks name and logo are owned by PS and licensed to us under a non-exclusive, royalty-free license agreement. The license can be terminated by either party for any reason with six months written notice. PS provides us property management services for the self-storage component of two assets we own and operates them under the “Public Storage” name. Either the Company or PS can cancel the property management contract upon 60 days’ notice. Under our supervision, PS coordinates and assists in rental and marketing activities, and property maintenance and other operational activities, including the selection of vendors, suppliers, employees, and independent contractors. Management fee expenses were $0.1 million for each of the years ended December 31, 2021, 2020, and 2019. Additionally, PS allocated certain operating expenses to us related to the management of these properties totaling $0.1 million for each of the years ended December 31, 2021, 2020, and 2019. These amounts are included under cost of operations on our consolidated statements of income. Pursuant to a cost sharing agreement, we share certain administrative services, corporate office space, and certain other third party costs with PS which are allocated based upon fair and reasonable estimates of the cost of the services expected to be provided. We reimbursed PS $1.4 million for costs PS incurred on our behalf for the year ended December 31, 2021 and $1.2 million for each of the years ended December 31, 2020, and 2019. PS reimbursed us less than $0.1 million for costs we incurred on their behalf for each of the years ended December 31, 2021, 2020, and 2019. The Company had net amounts due from PS of $0.2 million and due to PS less than $0.1 million at December 31, 2021 and 2020, respectively, for these contracts.

Stockholders_ Equity

Stockholders’ Equity	12 Months Ended
	Dec. 31, 2021
Stockholders’ Equity [Abstract]
Stockholders’ Equity	9. Stockholders’ equity Preferred stock As of December 31, 2021 and 2020, the Company had the following series of preferred stock outstanding: December 31, 2021 December 31, 2020 Earliest Potential Dividend Shares Amount Shares Amount Series Issuance Date Redemption Date Rate Outstanding (in thousands) Outstanding (in thousands)Series X September 2017 September 2022 5.250% 9,200  230,000  9,200  230,000 Series Y December 2017 December 2022 5.200% 8,000  200,000  8,000  200,000 Series Z November 2019 November 2024 4.875% 13,000  325,000  13,000  325,000 Series W October 2016 November 2021 (Redeemed) 5.200% — — 7,590  189,750 Total 30,200  $ 755,000  37,790  $ 944,750  On November 3, 2021, the Company completed the redemption of its 5.20% Cumulative Preferred Stock, Series W, at par of $189.8 million. The Company recorded a Preferred Redemption Allocation of $6.4 million for the year ended December 31, 2021. On December 30, 2019, the Company completed the redemption of its 5.75% Cumulative Preferred Stock, Series U, at par of $230.0 million as well as its 5.70% Cumulative Preferred Stock, Series V, at par of $110.0 million. The Company recorded a Preferred Redemption Allocation of $11.0 million for the year ended December 31, 2019. On November 4, 2019, we issued $325.0 million or 13,000,000 depositary stock representing interests in our 4.875% Cumulative Preferred Stock, Series Z, at $25.00 per depositary share. The 4.875% Series Z Cumulative Redeemable Preferred Units are non-callable for five years and have no mandatory redemption. We received $316.0 million in net issuance proceeds. We paid $46.6 million, $48.2 million, and $54.3 million in distributions to our preferred stockholders for the years ended December 31, 2021, 2020, and 2019, respectively. The holders of our preferred stock have general preference rights with respect to liquidation, quarterly distributions, and any accumulated unpaid distributions. Holders of our preferred stock will not be entitled to vote on most matters, except under certain conditions. In the event of a cumulative arrearage equal to six quarterly dividends, the holders of our preferred stock will have the right to elect two additional members to serve on the Company’s Board of Directors (the “Board”) until all events of default have been cured. At December 31, 2021, there were no dividends in arrears. Except under certain conditions relating to the Company’s qualification as a REIT, our preferred stock is not redeemable prior to the redemption dates noted above. On or after the respective redemption dates, the respective series of preferred stock will be redeemable, at the option of the Company, in whole or in part, at $25.00 per depositary share, plus any accrued and unpaid dividends. Common stock and units Dividends declared for the three months ended December 31, 2021 included a one-time Special Cash Dividend along with the fourth quarter regular dividend of $1.05 per share. The Special Cash Dividend was declared to distribute a portion of the excess income attributable to gains on sales from asset dispositions during 2021, as discussed in Note 3. We paid $242.6 million ($8.80 per share of common stock), $115.4 million ($4.20 per share of common stock), and $115.2 million ($4.20 per share of common stock) in distributions to our common stockholders for the years ended December 31, 2021, 2020, and 2019, respectively. We paid $64.3 million ($8.80 per common unit), $30.7 million ($4.20 per common unit), and $30.7 million ($4.20 per common unit) in distributions to our common unit holders for the years ended December 31, 2021, 2020, and 2019, respectively. The portion of the distributions classified as ordinary income was 35.0%, 100.0% and 100.0% for the years ended December 31, 2021, 2020, and 2019, respectively. The portion of the distributions classified as long-term capital gain income was 65.0%, 0.0% and 0.0% for the years ended December 31, 2021, 2020, and 2019, respectively. The percentages in the two preceding sentences are unaudited. Equity stock The Company is authorized to issue 100.0 million shares of equity stock. Our articles of incorporation provide that equity stock may be issued from time to time in one or more series and give the Board broad authority to fix the dividend and distribution rights, conversion and voting rights, redemption provisions and liquidation rights of each series of equity stock. As of December 31, 2021 and 2020, no equity stock had been issued.

Stock Compensation

Stock Compensation	12 Months Ended
	Dec. 31, 2021
Stock Compensation [Abstract]
Stock Compensation	10. Stock compensation Under various share-based compensation plans, PSB grants non-qualified options to purchase the Company’s common stock at a price not less than fair value on the date of grant, as well as RSUs, to certain directors, officers, and key employees. The service period for stock options and RSUs begins when (i) the Company and the recipient reach a mutual understanding of the key terms of the award, (ii) the award has been authorized, (iii) the recipient is affected by changes in the market price of our stock and (iv) it is probable that any performance conditions will be met, and ends when the stock options or RSUs vest. ‎ We amortize the fair value of awards starting at the beginning of the service period as compensation expense. For awards that are earned solely upon the passage of time and continued service, the entire cost of the award is amortized on a straight-line basis over the service period. For awards with performance conditions, the individual cost of each vesting is amortized separately over each individual service period (the “accelerated attribution” method). In connection with the appointment of our President and Chief Executive Officer (“CEO”) effective April 5, 2021, the Company granted a one-time RSU sign-on award with a grant date fair value of $3.7 million and a retention RSU award with a grant date fair value of $2.9 million. These RSUs will vest ratably over five years. Effective September 1, 2020, Maria Hawthorne retired from her role as President and CEO and continues to serve as a director of the Company. Due to Ms. Hawthorne’s continued service as a director of the Company, her unvested stock options and restricted stock units will continue to vest on their original vesting schedule in accordance with the Company’s 2012 Equity and Performance-Based Incentive Compensation Plan and related award agreements. For financial reporting purposes, the end of the service periods for these stock option and restricted stock unit grants have changed from the various respective vesting dates to September 1, 2020, the date of her retirement as President and CEO. Accordingly, all remaining stock compensation expense for Ms. Hawthorne, which totaled $1.7 million, was amortized, and included in general and administrative expense during the year ended December 31, 2020. We account for forfeitures of share-based payments as they occur by reversing previously amortized share-based compensation expense with respect to unvested grants that are forfeited in the period the employee terminates employment. Stock Options Stock options expire 10 years after the grant date and the exercise price is equal to the closing trading price of our common stock on the grant date. Stock option holders cannot require the Company to settle their award in cash. We use the Black-Scholes option valuation model to estimate the fair value of our stock options on the date of grant. 2021 2020 2019Stock option expense for the year ( in 000's) $ 712  $ 412  $ 299 Aggregate exercise date intrinsic value of options exercised during the year (in 000's) $ 4,559  $ 305  $ 1,567  Average assumptions used in valuing options with the Black-Scholes method: Expected life of options in years, based upon historical experience 5  5  5 Risk-free interest rate 0.8% 0.4% 2.0%Expected volatility, based upon historical volatility 15.4% 22.3% 22.2%Expected dividend yield 2.6% 3.3% 2.6% Average estimated value of options granted during the year $ 14.40  $ 15.27  $ 26.85  Included in 2021 compensation expense related to stock options was $0.1 million of expense resulting from modifications made to outstanding stock options because of the Special Cash Dividend paid in December 31, 2021. As of December 31, 2021, there was $0.9 million of unamortized compensation expense related to stock options expected to be recognize over a weighted average period of 3.0 years. Cash received from 55,546 stock options exercised during the year ended December 31, 2021 was $5.0 million. Cash received from 4,136 stock options exercised during the year ended December 31, 2020 was $0.3 million. Cash received from 15,585 stock options exercised during the year ended December 31, 2019 was $1.0 million. In connection with the Special Cash Dividend discussed in Note 9, the number of options and exercise prices of all outstanding options were adjusted pursuant to the anti-dilution provisions of the applicable plans so that the option holders would be neither advantaged nor disadvantaged because of the Special Cash Dividend.‎ Information with respect to stock options during 2021, 2020, and 2019 is as follows: Weighted Aggregate Weighted Average Intrinsic Number of Average Remaining ValueOptions:Options Exercise Price Contract Life (in thousands) Outstanding at December 31, 2018 143,415  $ 86.42  Granted 34,000  $ 163.95  Exercised (15,585) $ 62.15  Forfeited (4,000) $ 110.04  Outstanding at December 31, 2019 157,830  $ 104.92  Granted 18,000  $ 127.22  Exercised (4,136) $ 62.69  Forfeited — $— Outstanding at December 31, 2020 171,694  $ 108.29  Granted 38,000  $ 162.63  Exercised (55,546) $ 90.24  Forfeited — $— Special cash dividend adjustment (1) 5,422  $ 124.13  Outstanding at December 31, 2021 159,570  $ 123.87  6.21 Years $ 9,622 Exercisable at December 31, 2021 (1) 79,651  $ 99.71  3.98 Years $ 6,727 ____________________________ (1)In accordance with the applicable equity award plan documents, the number and exercise price of outstanding options have been adjusted because of the Special Cash Dividend so that the option holder maintains their economic position with respect to the stockholders. Restricted Stock Units RSUs granted prior to 2016 are subject to a six-year vesting, with 20% vesting after year two, and 20% vesting after each of the next four years. RSUs granted during and subsequent to 2016 are subject to a five-year vesting at the rate of 20% per year or a three-year vesting at the rate of one-third per year. Grantees receive dividends for each outstanding RSU equal to the per share dividend received by common stockholders, which are recorded in paid-in capital. We expense any dividends previously paid upon forfeiture of the related RSU. Upon vesting, the grantee receives shares of common stock equal to the number of vested RSUs, less shares of common stock withheld in exchange for tax withholdings made by the Company to satisfy the grantee’s statutory tax liabilities arising from the vesting. The fair value of our RSUs is determined based upon the applicable closing trading price of our common stock on the date of grant. In March 2020, the Compensation Committee of the Board approved an annual performance-based equity incentive program (“Annual Equity Incentive Program”) under the Company’s 2012 Equity and Performance-Based Incentive Compensation Plan. Under the program, certain employees will be eligible on an annual basis to receive RSUs based on the Company’s achievement of pre-established targets for (i) growth in net asset value per share, and (ii) stockholder value creation, each as computed pursuant to the terms of the Annual Equity Incentive Program. In the event the pre-established targets are achieved, eligible employees will receive the target award, except that the Compensation Committee of the Board may adjust the actual award to 75%-125% of the target award based on the its assessment of whether certain strategic and operational goals were accomplished in the performance period. RSUs awarded under the Annual Equity Incentive Program for the 2021 performance year will be awarded on or around March 1, 2022 and will vest in five equal installments, with the first installment vesting on the award date. RSU holders will earn dividend equivalent rights during the vesting period. In connection with the Annual Equity Incentive Program for the 2021 performance year, targets for 2021 were achieved at the threshold total return level. As such, subsequent to December 31, 2021, 25,140 restricted stock units were awarded with a March 1, 2021 grant date fair value of $3.6 million. Information with respect to RSUs during 2021, 2020, and 2019 is as follows (dollar amounts in thousands): Weighted Number of Average GrantRestricted Stock Units:RSUs Date Fair Value Nonvested at December 31, 2018 243,290  $ 23,386 Granted 6,400  1,137 Vested (95,500) (8,753)Forfeited (3,342) (345)Nonvested at December 31, 2019 150,848  15,425 Granted 46,036  5,562 Vested (73,256) (6,991)Forfeited (2,120) (290)Nonvested at December 31, 2020 121,508  $ 13,706 Granted 76,266  11,948 Vested (61,243) (6,255)Forfeited (17,940) (2,107)Nonvested at December 31, 2021 118,591  $ 17,292  Of the 76,266 RSUs the Company granted during the year ended December 31, 2021, 41,186 RSUs were granted to our President and CEO in April 2021 (discussed above), 10,955 were granted to our former Chief Financial Officer (“CFO”), 3,053 were granted to our Chief Accounting Officer and 16,970 RSUs in aggregate to our Divisional Vice Presidents. Subsequent to December 31, 2021, 14,070 RSUs previously awarded to our former CFO were forfeited. As of December 31, 2021, there was $12.6 million of unamortized compensation expense related to RSUs expected to be recognized over a weighted average period of 3.3 years. (In thousands, except number of shares) 2021 2020 2019Restricted stock unit expense $ 6,685  $ 4,475  $ 3,196 Shares of common stock issued upon vesting 35,714  43,458  55,267 Fair value of vested common stock on vesting date $ 9,474  $ 10,350  $ 15,078 Cash paid for taxes in lieu of shares of common stock withheld upon vesting of RSUs $ 3,940  $ 4,216  $ 6,350  Under the Retirement Plan for Non-Employee Directors (the “Director Retirement Plan”), the Company grants 1,000 shares of common stock for each year served as a director up to a maximum of 10,000 shares issued upon retirement. The Company recognizes compensation expense with regard to grants to be issued in the future under the Director Retirement Plan over the requisite service period. The Company recorded compensation expense related to these shares of $1.1 million, $0.8 million, and $1.5 million for the years ended December 31, 2021, 2020, and 2019, respectively. In April 2021, we issued 10,000 shares of common stock to a director upon retirement with an aggregate fair value of $1.6 million. No director retirement shares were issued during the year ended December 31, 2020. In April 2019, we issued 8,000 shares of common stock to a director upon retirement with an aggregate fair value of $1.2 million. Compensation expense for such shares issued in 2021 and 2019 was previously recognized.

Commitments And Contingencies

Commitments And Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments And Contingencies [Abstract]
Commitments And Contingencies	11. Commitments and contingencies The Company currently is neither subject to any material litigation nor, to management’s knowledge, is any material litigation currently threatened against the Company other than routine litigation and administrative proceedings arising in the ordinary course of business.

Schedule III - Real Estate And

Schedule III - Real Estate And Accumulated Depreciation	12 Months Ended
	Dec. 31, 2021
Schedule III - Real Estate And Accumulated Depreciation [Abstract]
Schedule III - Real Estate and Accumulated Depreciation	PS BUSINESS PARKS, INC.  SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATIONDECEMBER 31, 2021(IN THOUSANDS) Cost Capitalized Subsequent to Gross Carrying Amount at Initial Cost to Company Acquisition December 31, 2021 Buildings Buildings Buildings Depreciable and and and Accumulated LivesDescription Location Square Feet Land Improvements Improvements Land Improvements Total Depreciation Year(s) Acquired (Years)Buena Park Industrial Center Buena Park, CA 317 $ 3,245 $ 7,703 $ 3,663 $ 3,245 $ 11,366 $ 14,611 $ 8,982 1997 5-30Carson Carson, CA 77 990 2,496 1,805 990 4,301 5,291 3,591 1997 5-30Cerritos Business Center Cerritos, CA 395 4,218 10,273 4,952 4,218 15,225 19,443 12,417 1997 5-30Cerritos/Edwards Cerritos, CA 31 450 1,217 1,728 450 2,945 3,395 2,443 1997 5-30Concord Business Park Concord, CA 246 12,454 20,491 1,282 12,454 21,773 34,227 8,788 2011 5-30Culver City Culver City, CA 147 3,252 8,157 6,608 3,252 14,765 18,017 12,572 1997 5-30Bayview Business Park Fremont, CA 104 4,990 4,831 412 4,990 5,243 10,233 2,379 2011 5-30Christy Business Park Fremont, CA 334 11,451 16,254 1,714 11,451 17,968 29,419 7,927 2011 5-30Industrial Drive Distribution Center Fremont, CA 199 7,482 6,812 1,257 7,482 8,069 15,551 3,477 2011 5-30Bay Center Business Park Hayward, CA 463 19,052 50,501 3,631 19,052 54,132 73,184 21,477 2011 5-30Cabot Distribution Center Hayward, CA 249 5,859 10,811 532 5,859 11,343 17,202 4,144 2011 5-30Diablo Business Park Hayward, CA 271 9,102 15,721 1,189 9,102 16,910 26,012 6,778 2011 5-30Eden Landing Hayward, CA 83 3,275 6,174 212 3,275 6,386 9,661 2,558 2011 5-30Hayward Business Park Hayward, CA 1,091 28,256 54,418 8,582 28,256 63,000 91,256 23,024 2011 5-30Huntwood Business Park Hayward, CA 176 7,391 11,819 1,383 7,391 13,202 20,593 5,213 2011 5-30Parkway Commerce Hayward, CA 407 4,398 10,433 4,724 4,398 15,157 19,555 12,384 1997 5-30La Mirada Commerce Center La Mirada, CA 73 11,122 2,153 513 11,122 2,666 13,788 364 2020 5-30Laguna Hills Commerce Center Laguna Hills, CA 513 16,262 39,559 9,422 16,262 48,981 65,243 39,294 1997 5-30Plaza Del Lago Laguna Hills, CA 101 2,037 5,051 4,232 2,037 9,283 11,320 7,755 1997 5-30Canada Business Center Lake Forest, CA 297 5,508 13,785 6,961 5,508 20,746 26,254 16,826 1997 5-30Dixon Landing Business Park Milpitas, CA 505 26,301 21,121 4,438 26,301 25,559 51,860 11,490 2011 5-30Monterey/Calle Monterey, CA 12 288 706 382 288 1,088 1,376 927 1997 5-30Monterey Park Monterey Park, CA 199 3,078 7,862 1,878 3,078 9,740 12,818 8,158 1997 5-30Port of Oakland Oakland, CA 200 5,638 11,066 914 5,638 11,980 17,618 4,901 2011 5-30Kearney Mesa San Diego, CA 164 2,894 7,089 3,983 2,894 11,072 13,966 8,642 1997 5-30Rose Canyon Business Park San Diego, CA 233 15,129 20,054 3,058 15,129 23,112 38,241 15,452 2005 5-30Charcot Business Park San Jose, CA 283 18,654 17,580 2,113 18,654 19,693 38,347 8,692 2011/2014 5-30Las Plumas San Jose, CA 214 4,379 12,889 6,900 4,379 19,789 24,168 17,082 1998 5-30Little Orchard Distribution Center San Jose, CA 213 7,725 3,846 1,851 7,725 5,697 13,422 2,135 2011 5-30Montague Industrial Park San Jose, CA 316 14,476 12,807 782 14,476 13,589 28,065 6,345 2011 5-30Oakland Road San Jose, CA 177 3,458 8,765 3,415 3,458 12,180 15,638 10,210 1997 5-30Rogers Ave San Jose, CA 67 3,540 4,896 564 3,540 5,460 9,000 3,379 2006 5-30Doolittle Business Park San Leandro, CA 113 3,929 6,231 355 3,929 6,586 10,515 2,677 2011 5-30Bayshore Corporate Center San Mateo, CA 340 25,109 36,891 7,647 25,109 44,538 69,647 18,644 2013 5-30San Ramon/Norris Canyon San Ramon, CA 52 1,486 3,642 1,385 1,486 5,027 6,513 4,154 1997 5-30Commerce Park Santa Clara, CA 251 17,218 21,914 4,012 17,218 25,926 43,144 18,298 2007 5-30 g Cost Capitalized Subsequent to Gross Carrying Amount at Initial Cost to Company Acquisition December 31, 2021 Buildings Buildings Buildings Depreciable and and and Accumulated LivesDescription Location Square Feet Land Improvements Improvements Land Improvements Total Depreciation Year(s) Acquired (Years)Santa Clara Tech Park Santa Clara, CA 178 7,673 15,645 3,792 7,673 19,437 27,110 15,356 2000 5-30San Tomas Business Center Santa Clara, CA 79 12,932 3,549 931 12,932 4,480 17,412 707 2019 5-30Walsh at Lafayette Santa Clara, CA 321 13,439 17,890 1,223 13,439 19,113 32,552 8,535 2011 5-30Hathaway Industrial Park Santa Fe Springs, CA 543 65,494 36,786 2,715 65,494 39,501 104,995 3,557 2019 5-30Signal Hill Signal Hill, CA 343 16,360 16,678 3,851 16,360 20,529 36,889 12,634 1997/2006/2019 5-30Airport Boulevard So San Francisco, CA 52 899 2,387 809 899 3,196 4,095 2,702 1997 5-30South San Francisco/Produce So San Francisco, CA 41 776 1,886 514 776 2,400 3,176 1,987 1997 5-30Studio City/Ventura Studio City, CA 22 621 1,530 552 621 2,082 2,703 1,775 1997 5-30Kifer Industrial Park Sunnyvale, CA 287 13,227 37,874 1,946 13,227 39,820 53,047 15,730 2011 5-30Torrance Torrance, CA 147 2,318 6,069 3,833 2,318 9,902 12,220 8,206 1997 5-30Boca Commerce Boca Raton, FL 135 7,795 9,258 3,208 7,795 12,466 20,261 8,093 2006 5-30MICC Miami, FL 3,468 95,115 112,583 44,849 95,115 157,432 252,547 110,110 2003/2011/2014 5-30Wellington Wellington, FL 263 10,845 18,560 2,705 10,845 21,265 32,110 12,067 2006 5-30Ammendale Beltsville, MD 255 3,652 15,218 10,333 3,652 25,551 29,203 22,126 1998 5-30Gaithersburg/Christopher Gaithersburg, MD 29 475 1,203 905 475 2,108 2,583 1,733 1997 5-30Gude Drive (Land) Rockville, MD — 1,142 — 328 1,142 328 1,470 243 2001 5-30Parklawn Business Park Rockville, MD 231 3,387 19,628 6,193 3,387 25,821 29,208 13,777 2010 5-30The Grove 270 Rockville, MD 577 11,009 58,364 23,703 11,009 82,067 93,076 41,184 2010/2016 5-30Ben White Austin, TX 108 1,550 7,015 3,385 1,550 10,400 11,950 7,398 1998 5-30Lamar Business Park Austin, TX 198 2,528 6,596 8,477 2,528 15,073 17,601 12,321 1997 5-30McKalla Austin, TX 236 1,945 13,212 2,568 1,945 15,780 17,725 10,130 1998/2012 5-30McNeil Austin, TX 525 5,477 24,495 5,992 5,477 30,487 35,964 16,293 1999/2010/2012/2014 5-30Rutland Austin, TX 235 2,022 9,397 3,007 2,022 12,404 14,426 9,583 1998/1999 5-30Waterford Austin, TX 106 2,108 9,649 4,007 2,108 13,656 15,764 11,391 1999 5-30Braker Business Park Austin, TX 257 1,874 13,990 3,140 1,874 17,130 19,004 9,417 2010 5-30Mopac Business Park Austin, TX 117 719 3,579 739 719 4,318 5,037 2,347 2010 5-30Southpark Business Park Austin, TX 181 1,266 9,882 2,701 1,266 12,583 13,849 6,771 2010 5-30Valwood Business Center Carrollton, TX 356 2,510 13,859 4,002 2,510 17,861 20,371 7,506 2013 5-30Northway Plaza Farmers Branch, TX 131 1,742 4,503 2,629 1,742 7,132 8,874 2,763 2013 5-30Springlake Business Center Farmers Branch, TX 206 2,607 5,715 1,698 2,607 7,413 10,020 3,516 2013/2014 5-30Westwood Business Park Farmers Branch, TX 112 941 6,884 2,501 941 9,385 10,326 6,825 2003 5-30Eastgate Garland, TX 36 480 1,203 552 480 1,755 2,235 1,443 1997 5-30Port America Grapevine, TX 718 20,308 100,896 143 20,308 101,039 121,347 1,511 2021 5-30Freeport Business Park Irving, TX 339 5,552 17,568 3,428 5,552 20,996 26,548 6,664 2013/2021 5-30NFTZ (1) Irving, TX 231 1,517 6,499 4,024 1,517 10,523 12,040 8,919 1998 5-30La Prada Mesquite, TX 56 495 1,235 823 495 2,058 2,553 1,728 1997 5-30Jupiter Business Park Plano, TX 141 2,283 22,817 — 2,283 22,817 25,100 86 2021 5-30The Summit Plano, TX 184 1,536 6,654 4,420 1,536 11,074 12,610 9,252 1998 5-30Arapaho Business Park Richardson, TX 408 5,226 10,661 4,989 5,226 15,650 20,876 8,068 2013/2014 5-30Richardson Business Park Richardson, TX 117 799 3,568 3,232 799 6,800 7,599 5,872 1998 5-30Bren Mar Alexandria, VA 113 2,197 5,380 4,523 2,197 9,903 12,100 8,151 1997 5-30Eisenhower Alexandria, VA 95 1,440 3,635 2,947 1,440 6,582 8,022 5,567 1997 5-30 Cost Capitalized Subsequent to Gross Carrying Amount at Initial Cost to Company Acquisition December 31, 2021 Buildings Buildings Buildings Depreciable and and and Accumulated LivesDescription Location Square Feet Land Improvements Improvements Land Improvements Total Depreciation Year(s) Acquired (Years)Pickett Industrial Park Alexandria, VA 246 19,138 25,016 1,429 19,138 26,445 45,583 1,336 2020 5-30Beaumont Chantilly, VA 107 4,736 11,051 2,294 4,736 13,345 18,081 9,110 2006 5-30Dulles South Chantilly, VA 99 1,373 6,810 3,172 1,373 9,982 11,355 7,932 1999 5-30Lafayette Chantilly, VA 197 1,680 13,398 6,794 1,680 20,192 21,872 15,849 1999/2000 5-30Fair Oaks Business Park Fairfax, VA 290 13,598 36,232 10,498 13,598 46,730 60,328 31,981 2004/2007 5-30Gunston Lorton, VA 247 4,146 17,872 13,136 4,146 31,008 35,154 24,173 1998 5-30The Mile McLean, VA 628 38,279 83,596 27,497 38,279 111,093 149,372 58,282 2010/2011 5-30Prosperity at Merrifield Merrifield, VA 659 23,147 67,575 40,476 23,147 108,051 131,198 79,924 2001 5-30Alban Road Springfield, VA 150 1,935 4,736 5,261 1,935 9,997 11,932 8,385 1997 5-30I-95 Springfield, VA 210 3,535 15,672 15,128 3,535 30,800 34,335 25,926 2000 5-30Fullerton Road Industrial Park Springfield, VA 243 7,438 24,971 1,241 7,438 26,212 33,650 3,990 2018 5-30Northern Virginia Industrial Park Springfield, VA 814 18,369 87,258 7,575 18,369 94,833 113,202 14,750 2018 5-30Northpointe Sterling, VA 147 2,767 8,778 5,182 2,767 13,960 16,727 11,920 1997/1998 5-30Shaw Road Sterling, VA 149 2,969 10,008 5,094 2,969 15,102 18,071 12,864 1998 5-30Tysons Corporate Center Vienna, VA 270 9,885 25,302 11,028 9,885 36,330 46,215 19,502 2010 5-30Woodbridge Woodbridge, VA 114 1,350 3,398 2,484 1,350 5,882 7,232 4,947 1997 5-30212th Business Park Kent, WA 951 19,573 17,695 13,478 19,573 31,173 50,746 15,437 2012 5-30Overlake Redmond, WA 371 20,906 38,522 8,045 20,906 46,567 67,473 32,500 2007 5-30Renton Renton, WA 28 330 889 760 330 1,649 1,979 1,393 1997 5-30 Total commercial real estate 27,010 845,531 1,678,797 475,368 845,531 2,154,165 2,999,696 1,167,824 Highgate at The Mile McLean, VA 395 units 21,814 84,923 49 21,814 84,972 106,786 10,573 2018 5-40Total real estate facilities 867,345 1,763,720 475,417 867,345 2,239,137 3,106,482 1,178,397 Properties held for sale Royal Tech Irving, TX 702 12,683 48,521 26,214 12,683 74,735 87,418 56,285 1998-2000/2011 5-30Total 27,712 $ 880,028 $ 1,812,241 $ 501,631 $ 880,028 $ 2,313,872 $ 3,193,900 $ 1,234,682 ____________________________(1)The Company owns two properties that are subject to ground leases in Irving, Texas. These leases expire in 2029 and 2030.

Basis Of Presentation And Sum_2

Basis Of Presentation And Summary Of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2021
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Basis Of Presentation	Basis of presentation The accompanying consolidated financial statements include the accounts of PSB and its subsidiaries, including the OP and its consolidated joint ventures. All significant inter-company balances and transactions have been eliminated in the consolidated financial statements. The financial statements are presented on an accrual basis in accordance with U.S. generally accepted accounting principles (“GAAP”).
Consolidation And Equity Method Of Accounting	Consolidation and equity method of accounting We consider entities to be Variable Interest Entities (“VIEs”) when they have insufficient equity to finance their activities without additional subordinated financial support provided by other parties, or the equity holders as a group do not have a controlling financial interest. A limited partnership is also generally considered a VIE if the limited partners do not participate in operating decisions. We consolidate VIEs when we are the primary beneficiary, generally defined as having (i) the power to direct the activities most significantly impacting economic performance and (ii) either the obligation to absorb losses or the right to receive benefits from the VIE. We account for investments in entities that are not VIEs that we have significant influence over, but do not control, using the equity method of accounting and for investment in entities that we control, we consolidate. We do not consider the joint venture entity that owns Highgate at The Mile a VIE, but we consolidate the entity as the Company has control over the joint venture. See Note 3 for more information relating to this joint venture arrangement. We have a 98.2% interest in Brentford at The Mile, a planned 411-unit multifamily apartment complex (the “Brentford Joint Venture”). An unrelated real estate development company (the “JV Partner”) holds the remaining 1.8% interest. Based on management’s analysis of the joint venture and certain related agreements, we determined Brentford Joint Venture is a VIE because (a) Brentford Joint Venture does not have sufficient equity at risk to finance its activities without additional subordinated financial support from other parties, and (b) there are no substantive kick-out rights. We have also concluded we have control over the Brentford Joint Venture as we (a) are the managing member of the Brentford Joint Venture, (b) have designated decision making power to direct the activities that most significantly affect the economic performance of the Brentford Joint Venture, and (c) have a 98.2% economic interest in the investment. Thus, we determined that we are the primary beneficiary of Brentford Joint Venture. As such, we consolidate the Brentford Joint Venture, and the related land and development costs of $59.9 million and $15.1 million were included in land and building held for development, net on our consolidated balance sheets as of December 31, 2021 and 2020, respectively. The assets of the Brentford Joint Venture may only be used to settle obligations of the Brentford Joint Venture and the creditors of the Brentford Joint Venture have no recourse to the general credit of the Company. See Note 4 for more information relating to this joint venture arrangement. PS, the sole limited partner in the OP, has no power to direct the activities of the OP. PSB is the primary beneficiary and has control over the OP as it has the exclusive responsibility under the Operating Partnership Agreement to manage and conduct the business of the OP. Accordingly, we consider the OP a VIE and consolidate it. Substantially all of our assets and liabilities are held by the OP.
Noncontrolling Interests	Noncontrolling interests Noncontrolling interests represent (i) PS’s noncontrolling interest in the OP through its ownership of 7,305,355 common partnership units, (ii) the JV Partner’s 5.0% interest in our consolidated joint venture that owns Highgate at The Mile, and (iii) the JV Partner’s 1.8% interest in our consolidated joint venture formed to develop Brentford at The Mile. See Note 7 for further information on noncontrolling interests.
Use Of Estimates	Use of estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates.
Financial Instruments	Financial instruments The methods and assumptions used to estimate the fair value of financial instruments are described below. The Company has estimated the fair value of financial instruments using available market information and appropriate valuation methodologies. Considerable judgment is required in interpreting market data to develop estimates of market value. Accordingly, estimated fair values are not necessarily indicative of the amounts that could be realized in current market exchanges. The Company determines the estimated fair value of financial assets and liabilities utilizing a hierarchy of valuation techniques based on whether the inputs to a fair value measurement are considered to be observable or unobservable in a marketplace. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect market assumptions. This hierarchy requires the use of observable market data when available. The following is the fair value hierarchy: Level 1—quoted prices for identical instruments in active markets; Level 2—quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and Level 3—fair value measurements derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. Financial assets that are exposed to credit risk consist primarily of cash equivalents and receivables. The Company considers all highly liquid investments with a remaining maturity of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents, which consist primarily of money market investments, are only invested in entities with an investment grade rating. Receivables are balances due from various customers. Balances that the Company expects to become uncollectible are written off. Due to the short period to maturity of the Company’s cash and cash equivalents, accounts receivable, other assets and accrued and other liabilities, the carrying values as presented on the consolidated balance sheets are reasonable estimates of fair value. Carrying values of the Company’s Credit Facility (as defined in Note 6) approximate fair value. The characteristics of the Credit Facility, market data and other comparative metrics utilized in determining these fair values are “Level 2” inputs. The following table provides a reconciliation of cash, cash equivalents and restricted cash per the consolidated statements of cash flow to the corresponding financial statement line items in the consolidated balance sheets as of December 31, 2021, 2020, and 2019 (in thousands): For the Years Ended December 31, 2021 2020 2019Consolidated balance sheets Cash and cash equivalents $ 27,074  $ 69,083  $ 62,786 Restricted cash included in Land and building held for development, net (1) 1,088  1,088  1,088 Cash, cash equivalents and restricted cash at the end of the period $ 28,162  $ 70,171  $ 63,874 ____________________________(1)In conjunction with seeking entitlements to develop our multifamily projects in Tysons, Virginia, we contributed $1.1 million into an escrow account for the future development of an athletic field. This amount is reflected in the table above as restricted cash included in land and building held for development, net.
Intangible Assets/Liabilities	Intangible assets/liabilities When we acquire real estate facilities, an intangible asset is recorded in other assets for leases where the in-place rent is higher than market rents, and an intangible liability is recorded in other liabilities where the market rents are higher than the in-place rents. The amounts recorded are based upon the present value (using a discount rate which reflects the risks associated with the leases acquired) of such differences over the lease term and such amounts are amortized to rental income over the respective remaining lease term. As of December 31, 2021, the value of above-market in-place rents resulted in net intangible assets of $0.6 million, net of $11.6 million of accumulated amortization, and the value of below-market in-place rents resulted in net intangible liabilities of $2.8 million, net of $13.1 million of accumulated amortization. As of December 31, 2020, the value of above-market in-place rents resulted in net intangible assets of $1.2 million, net of $11.1 million of accumulated amortization, and the value of below-market in-place rents resulted in net intangible liabilities of $2.2 million, net of $12.2 million of accumulated amortization. Additionally, when we acquire real estate facilities, the value of in-place lease intangible (i.e., customer lease-up costs) is recorded in other assets and is amortized to depreciation and amortization expense over the respective remaining lease term. As of December 31, 2021, the value of acquired in-place leases resulted in net intangible assets of $6.0 million, net of $10.5 million of accumulated amortization. As of December 31, 2020, the value of acquired in-place leases resulted in net intangible assets of $5.3 million, net of $7.2 million of accumulated amortization. As of December 31, 2021, the value of our right-of-use (“ROU”) assets relating to our existing ground lease arrangements, included in “other assets” on our consolidated balance sheets and the corresponding liability included under “accrued and other liabilities,” was $1.3 million, net of $0.3 million of accumulated amortization. As of December 31, 2020, the value of our ROU assets and related liability relating to our ground lease arrangements was $1.5 million, net of $0.2 million of accumulated amortization. The ground leases expire in 2029 and 2030 and do not have options to extend. As of December 31, 2021, the remaining lease terms were 7.8 years and 8.1 years. Lease expense for these ground leases is recognized in the period the applicable costs are incurred, and the monthly lease amount for these operating leases is constant and without contractual increases throughout the remaining terms.
Real Estate Facilities	Real estate facilities Real estate facilities are recorded at cost. Property taxes, insurance, interest, and costs essential to the development of property for its intended use are capitalized during the period of development. Direct costs related to the renovation or improvement of the properties are capitalized. Expenditures for repairs and maintenance are expensed as incurred. Expenditures that are expected to provide benefit for a period greater than two years are capitalized and depreciated over their estimated useful life. Buildings and improvements are depreciated using the straight-line method over their estimated useful lives, which generally range from five to 30 years. Transaction costs, which include tenant improvements and lease commissions, for leases with terms greater than one year are capitalized and depreciated over the corresponding lease term.
Property Held for Development	Property held for development Property is classified as held for development when it is no longer used in its original form and it will be developed to an alternate use. Property held for development is not depreciated.
Property Held for Sale	Property held for sale Property is classified as held for sale when all of the following criteria for a plan of sale have been met: (i) management, having the authority to approve the action, commits to a plan to sell the property; (ii) the property is available for immediate sale in its present condition, subject only to terms that are usual and customary; (iii) an active program to locate a buyer and other actions required to complete the plan to sell have been initiated; (iv) the sale of the property is probable and is expected to be completed within one year; (v) the property is being actively marketed for sale at a price that is reasonable in relation to its current fair value; and (vi) actions necessary to complete the plan of sale indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. Depreciation of assets ceases upon designation of a property as held for sale. If the disposal of a property represents a strategic shift that has (or will have) a major effect on our operations or financial results, such as (i) a major line of business, (ii) a major geographic area, (iii) a major equity method investment, or (iv) other major parts of an entity, then the operations of the property, including any interest expense directly attributable to it, are classified as discontinued operations in our consolidated statements of operations, and amounts for all prior periods presented are reclassified from continuing operations to discontinued operations. The disposal of an individual property generally will not represent a strategic shift and therefore will typically not meet the criteria for classification as a discontinued operation.
Sales of Real Estate Facilities	Sales of real estate facilities Sales of real estate facilities are not part of our ordinary activities, and as a result, we consider such sales as contracts with non-customers. We recognize sales of real estate when we have collected payment and the attributes of ownership, such as possession and control of the asset, have been transferred to the buyer. If a contract for sale includes obligations to provide goods or services to the buyer, an allocated portion of the contract price is recognized as revenue as the related goods or services are transferred to the buyer.
Evaluation of Asset Impairment	Evaluation of asset impairment We evaluate our real estate and finite-lived intangible assets for impairment each quarter. We review current activities and changes in the business conditions of all of our long-lived assets to determine the existence of any triggering events or impairment indicators requiring an impairment analysis. If triggering events or impairment indicators are identified, we review an estimate of the future undiscounted cash flows, including, if necessary, a probability-weighted approach if multiple outcomes are under consideration. ‎ Upon determination that an impairment has occurred, a write-down is recognized to reduce the carrying amount of the asset to its estimated fair value. If an impairment charge is not required to be recognized, the recognition of depreciation or amortization is adjusted prospectively, as necessary, to reduce the carrying amount of the asset to its estimated disposition value over the remaining period that the asset is expected to be held and used. We may adjust depreciation of properties that are expected to be disposed of or redeveloped prior to the end of their useful lives. No impairment charges were recorded in any period presented herein.
Asset Impairment Due to Casualty Loss	Asset impairment due to casualty loss It is our policy to record losses due to physical damages during the accounting period in which they occur, while the amount of monetary assets to be received from the insurance policy, if any, is recognized when receipt of insurance recoveries is probable. Losses, which are reduced by the related probable insurance recoveries, are recorded as costs of operations on the consolidated statements of income. Anticipated proceeds in excess of recognized losses would be considered a gain contingency and recognized when the contingency related to the insurance claim has been resolved. Anticipated recoveries for lost rental income due to property damages are also considered to be a gain contingency and recognized when the contingency related to the insurance claim has been resolved. No material casualty losses were incurred in any period presented herein.
Stock-Based Compensation	Stock-based compensation Stock-based payments to employees, including grants of employee stock options, are recognized as stock compensation expense in the Company’s consolidated statements of income based on their grant date fair values, except for performance-based grants, which are accounted for based on their fair values at the beginning of the service period. See Note 10.
Accrued and Other Liabilities	Accrued and other liabilities Accrued and other liabilities consist primarily of rents prepaid by our customers, trade payables, property tax accruals, accrued payroll and contingent loss accruals when probable and estimable, as well as the intangible liabilities discussed above. We disclose the nature of significant losses not accrued that are reasonably possible of occurring and, if estimable, a range of exposure. The fair value of accrued and other liabilities approximate book value due to the short period until settlement.
Other Assets	Other assets Other assets are comprised primarily of prepaid expenses, as well as the intangible assets discussed above.
Revenue Recognition	Revenue recognition We recognize the aggregate rent to be collected (including the impact of escalators and concessions) under leases ratably throughout the non-cancellable lease term on a “straight-line” basis, commencing when the customer takes control of the leased space. Cumulative straight-line rent recognized in excess of amounts billed per the lease term is presented as “deferred rent receivable” on our consolidated balance sheets. The Company presents reimbursements from customers for real estate taxes and other recoverable operating expenses under a single lease component presentation as the timing and pattern of transfer of such reimbursements are the same as base rent, and the combined single component of such leases are classified as operating leases. Accordingly, the Company recognizes such variable lease payments resulting from the reimbursements from customers for real estate taxes and other recoverable operating expenses as rental income in the period the applicable costs are incurred. Property management fees are recognized in the period earned as other income. ‎ The Company monitors the collectability of its receivable balances, including deferred rent receivable balances, on an ongoing basis. The Company writes off uncollectible customer receivable balances, including deferred rent receivable balances, as a reduction to rental income in the period such balances are no longer probable of being collected. Therefore, recognition of rental income is limited to the lesser of the amount of cash collected or rental income reflected on a “straight-line” basis, plus any accruable variable lease payments for those customer receivable balances. The Company wrote-off accounts receivable, net of recoveries of $0.1 million, $1.6 million, and $1.1 million, respectively, and wrote off deferred rent receivable of $0.3 million, $3.1 million, and $0.5 million, respectively for the year ended December 31, 2021, 2020, and 2019, respectively. The Company recognized revenue from its lease arrangements aggregating to $438.7 million, $415.6 million, and $429.8 million for the years ended December 31, 2021, 2020, and 2019, respectively. This revenue consisted primarily of rental income from operating leases and the related variable lease payments resulting from reimbursements of property operating expenses. Base rental income was $333.9 million, $319.2 million, and $333.3 million for the years ended December 31, 2021, 2020, and 2019, respectively, while variable lease payments, consisting primarily of reimbursement of property operating expenses, were $104.8 million, $96.4 million, and $96.5 million for the years ended December 31, 2021, 2020, and 2019, respectively. During the year ended December 31, 2021 the Company agreed to defer $0.5 million and abate $0.3 million of billed rental income, which was significantly lower than the $5.7 million of rent deferrals and $1.3 million of rent abatements granted during the year ended December 31, 2020. Since the onset of the COVID-19 pandemic, the Company entered into rent relief agreements consisting of $6.2 million of rent deferrals and $1.6 million of rent abatements. As of December 31, 2021, the 317 current customers that received rent relief account for 9.5% of rental income. Also as of December 31, 2021, the Company had collected $5.3 million of rent deferral repayment, representing 99.8% of the amounts scheduled to be repaid through December 2021. An additional $0.9 million of rent deferral repayment is scheduled to be repaid thereafter. The duration and severity of the effects of the COVID-19 pandemic on the economy are uncertain and are likely to impact collectability of certain customers’ rent receivable balances in the future. The Company has taken into account the current financial condition of its tenants, including consideration of COVID-19 impacts, in its estimation of its uncollectible accounts and deferred rents receivable at December 31, 2021. The Company is closely monitoring the collectability of such rents and will adjust future estimations as appropriate as further information becomes known. In April 2020, the Financial Accounting Standards Board issued a Staff Question-and-Answer (“Lease Modification Q&A”) to respond to frequently asked questions about accounting for lease concessions related to the coronavirus (“COVID-19”) pandemic. Under existing lease guidance, an entity would have to determine, on a lease by lease basis, if a lease concession contained a lease modification which would be accounted for under the lease modification framework, or if a lease concession was an enforceable right or obligation that existed in the original lease, which would be accounted for outside the lease modification framework. The Lease Modification Q&A provides that, to the extent that cash flow after the lease concessions are substantially the same, or less than, the cash flow previously required by the existing lease, an entity is not required to evaluate each contract to determine whether a concession provided by a lessor to a lessee in response to the COVID-19 pandemic is a lease modification. Instead, an entity can account for such lease concessions either (i) as if they were part of the enforceable rights and obligations of the parties under the existing lease contract; or (ii) as a lease modification. Based on the Lease Modification Q&A, an entity is not required to account for all lease concessions in response to the COVID-19 pandemic under one elected option; however, the entity is required to apply the elected option consistently to leases with similar characteristics and in similar circumstances. In accordance with the Lease Modification Q&A, the Company has elected to account for lease concessions in response to the COVID-19 pandemic as a lease modification if the cash flow after these lease concessions is substantially the same, or less than, the cash flow previously required by the existing lease. The Company records rent deferrals and rent abatements in deferred rent receivable in the accompanying consolidated balance sheets and will recognize these amounts over the remainder of the respective lease terms. For lease concessions in response to the COVID-19 pandemic that modified the terms and substantially changed the underlying cash flow of the existing lease for the remaining term, the Company also accounts for such concessions as a lease modification.
General and Administrative Expense	‎ General and administrative expense General and administrative expense includes executive and other compensation, corporate office expenses, professional fees, and other such costs that are not directly related to the operation of our real estate facilities.
Income Taxes	Income taxes We have elected to be treated as a REIT, as defined in the Internal Revenue Code of 1986, as amended (the “Code”). As a REIT, we do not incur U.S. federal corporate income tax if we distribute all our “REIT taxable income” each year, and if we meet certain organizational and operational requirements. We believe we have met these REIT requirements for all periods presented herein. Accordingly, we have recorded no U.S. federal corporate income tax expense related to our “REIT taxable income.” We recognize tax benefits of uncertain income tax positions that are subject to audit only if we believe it is more likely than not that the position would be sustained assuming the relevant taxing authorities had full knowledge of the relevant facts and circumstances of our positions. As of December 31, 2021 and 2020, we did not recognize any tax benefit for uncertain tax positions.
Accounting for Preferred Equity Issuance Costs	Accounting for preferred equity issuance costs We record preferred equity issuance costs as a reduction to paid-in capital on our consolidated balance sheets at the time the preferred securities are issued and reflect the carrying value of the preferred equity at its redemption value. An additional allocation of income is made from the common stockholders to the preferred stockholders in the amount of the original issuance costs, and we reclassify the redemption value from equity to liabilities, when we call preferred stock for redemption, with such liabilities relieved once the preferred stock is redeemed.
Net Income per Share of Common Share	Net income per share of common stock Notwithstanding the presentation of income allocations on our consolidated statements of income, net income is allocated to (a) preferred stockholders, for distributions paid or payable, (b) preferred stockholders, to the extent redemption value exceeds the related carrying value (“Preferred Redemption Allocation”), (c) our joint venture partner in proportion to its percentage interest in the joint ventures, to the extent the consolidated joint ventures produce net income or loss during the period and (d) restricted stock unit (“RSU”) holders, for non-forfeitable dividends paid adjusted for participation rights in undistributed earnings. The remaining net income is allocated to the common partnership units and our common stockholders, respectively, based upon the pro-rata aggregate number of units and stock outstanding. Basic and diluted net income per share of common stock are each calculated based upon net income allocable to common stockholders, divided by (i) in the case of basic net income per share of common stock, weighted average common stock and (ii) in the case of diluted net income per share of common stock, weighted average common stock adjusted for the impact of stock compensation awards outstanding (see Note 10) using the treasury stock method. ‎ The following table sets forth the components of our basic and diluted net income per share that are not reflected on the face of our consolidated statements of income, including the allocation of income to common stockholders and common partnership units, the percentage of weighted average common stock and common partnership units outstanding, as well as basic and diluted weighted average common stock outstanding for the years ended December 31, (in thousands): 2021 2020 2019Calculation of net income allocable to common stockholders Net income$ 553,029  $ 206,705  $ 203,972 Net (income) loss allocated to Preferred stockholders based upon distributions (46,624) (48,186) (54,346)Preferred stockholders based upon redemptions (6,434) — (11,007)Noncontrolling interests—joint venture 20  (17) (44)Restricted stock unit holders (2,613) (716) (910)Net income allocable to common stockholders and noncontrolling interests—common units 497,378  157,786  137,665 Net income allocation to noncontrolling interests— common units (104,290) (33,141) (28,962)Net income allocable to common stockholders$ 393,088  $ 124,645  $ 108,703  Calculation of common partnership units as a percentage of common stock equivalents Weighted average common stock outstanding 27,534  27,475  27,418 Weighted average common partnership units outstanding 7,305  7,305  7,305 Total common stock equivalents 34,839  34,780  34,723 Common partnership units as a percentage of common stock equivalents 21.0% 21.0% 21.0% Weighted average common stock outstanding Basic weighted average common stock outstanding 27,534  27,475  27,418 Net effect of dilutive stock compensation—based on treasury stock method using average market price 102  88  108 Diluted weighted average common stock outstanding 27,636  27,563  27,526
Segment Reporting	Segment reporting The Company has two operating segments: (i) the acquisition, development, ownership, and management of commercial real estate and (ii) the acquisition, development, ownership, and management of multifamily real estate, but has only one reportable segment as the multifamily segment does not meet the quantitative thresholds necessary to require reporting as a separate segment.
Reclassifications	Reclassifications Certain reclassifications have been made to the consolidated financial statements for 2020 to conform to the 2021 presentation, including reclassifying assets held for sale or sold during 2021 from “real estate facilities, at cost” of $70.0 million and “land and building held for development, net” of $5.1 million as of December 31, 2020 into “properties held for sale, net” of $75.1 million on our consolidated balance sheets. Additionally, we combined all non-cash rental income items into “straight-line rent and amortization of lease intangibles, net” within the operating activities section of our consolidated statements of cash flows for all periods presented herein.‎

Basis Of Presentation And Sum_3

Basis Of Presentation And Summary Of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Reconciliation of Cash, Cash Equivalents and Restricted Cash	For the Years Ended December 31, 2021 2020 2019Consolidated balance sheets Cash and cash equivalents $ 27,074  $ 69,083  $ 62,786 Restricted cash included in Land and building held for development, net (1) 1,088  1,088  1,088 Cash, cash equivalents and restricted cash at the end of the period $ 28,162  $ 70,171  $ 63,874 ____________________________(1)In conjunction with seeking entitlements to develop our multifamily projects in Tysons, Virginia, we contributed $1.1 million into an escrow account for the future development of an athletic field. This amount is reflected in the table above as restricted cash included in land and building held for development, net.
Calculation Of Earnings Per Share	2021 2020 2019Calculation of net income allocable to common stockholders Net income$ 553,029  $ 206,705  $ 203,972 Net (income) loss allocated to Preferred stockholders based upon distributions (46,624) (48,186) (54,346)Preferred stockholders based upon redemptions (6,434) — (11,007)Noncontrolling interests—joint venture 20  (17) (44)Restricted stock unit holders (2,613) (716) (910)Net income allocable to common stockholders and noncontrolling interests—common units 497,378  157,786  137,665 Net income allocation to noncontrolling interests— common units (104,290) (33,141) (28,962)Net income allocable to common stockholders$ 393,088  $ 124,645  $ 108,703  Calculation of common partnership units as a percentage of common stock equivalents Weighted average common stock outstanding 27,534  27,475  27,418 Weighted average common partnership units outstanding 7,305  7,305  7,305 Total common stock equivalents 34,839  34,780  34,723 Common partnership units as a percentage of common stock equivalents 21.0% 21.0% 21.0% Weighted average common stock outstanding Basic weighted average common stock outstanding 27,534  27,475  27,418 Net effect of dilutive stock compensation—based on treasury stock method using average market price 102  88  108 Diluted weighted average common stock outstanding 27,636  27,563  27,526

Real Estate Facilities (Tables)

Real Estate Facilities (Tables)	12 Months Ended
	Dec. 31, 2021
Real Estate Facilities [Abstract]
Activity In Real Estate Facilities	Buildings and Accumulated Land Improvements Depreciation Total Balances at December 31, 2018$ 725,411  $ 1,973,658  $ (968,680) $ 1,730,389 Acquisition of real estate facilities 88,093  44,313  — 132,406 Capital expenditures — 40,092  — 40,092 Disposals (1) — (15,796) 15,796  —Depreciation and amortization expense — — (93,416) (93,416)Transfer to properties held for sale — (3,796) 10,691  6,895 Balances at December 31, 2019 813,504  2,038,471  (1,035,609) 1,816,366 Acquisition of real estate facilities 30,261  27,168  — 57,429 Capital expenditures — 36,328  — 36,328 Disposals (1) — (19,399) 19,399  —Depreciation and amortization expense — — (90,058) (90,058)Transfer to properties held for sale — (1,673) 4,529  2,856 Balances at December 31, 2020 (2) 843,765  2,080,895  (1,101,739) 1,822,921 Acquisition of real estate facilities 22,591  123,711  — 146,302 Capital expenditures — 37,976  — 37,976 Disposals (1) — (9,892) 9,892  —Depreciation and amortization expense — — (90,175) (90,175)Transfer from property held for development 989  8,063  — 9,052 Transfer to properties held for sale — (1,616) 3,625  2,009 Balances at December 31, 2021$ 867,345  $ 2,239,137  $ (1,178,397) $ 1,928,085 ____________________________(1)Disposals primarily represent the book value of tenant improvements that have been removed upon the customer vacating their space.(2)Land, building and improvements, and accumulated depreciation, respectively, totaling $30.9 million, $166.5 million, and $127.4 million were reclassified as of December 31, 2020 to “properties held for sale, net” representing a 772,000 square foot industrial-flex business park located in Irving, Texas, a 371,000 square foot industrial-flex business park located in San Diego, California, a 244,000 square foot office business park located in Herndon, Virginia, a 198,000 square foot office-oriented flex business park located in Chantilly, Virginia, a 53,000 square foot industrial building located in Beltsville, Maryland, and a 22,000 square foot single-tenant industrial-flex building located in Irving, Texas.
Summary Of Real Estate Assets Acquired And Liabilities Assumed	2021 2020 2019Land$ 22,591  $ 30,261  $ 88,093 Buildings and improvements 123,711  27,168  44,313 Other assets (above-market in-place rents) — 523  —Accrued and other liabilities (below-market in-place rents) (1,457) (557) (1,241)Other assets (in-place lease intangible) 4,023  2,700  3,777 Total purchase price 148,868  60,095  134,942 Net operating assets acquired and liabilities assumed (1,166) (76) (664)Total cash paid$ 147,702  $ 60,019  $ 134,278

Leasing Activity (Tables)

Leasing Activity (Tables)	12 Months Ended
	Dec. 31, 2021
Leasing Activity [Abstract]
Summary Of Future Minimum Rental Income Excluding Recovery Of Operating Expenses	2022$ 290,712 2023 226,498 2024 160,933 2025 100,741 2026 66,388 Thereafter 107,051 Total (1)$ 952,323 ____________________________(1)Excludes future minimum rental income from assets held for sale as of December 31, 2021.

Stockholders_ Equity (Tables)

Stockholders’ Equity (Tables)	12 Months Ended
	Dec. 31, 2021
Stockholders’ Equity [Abstract]
Schedule Of Preferred Stock Outstanding	December 31, 2021 December 31, 2020 Earliest Potential Dividend Shares Amount Shares Amount Series Issuance Date Redemption Date Rate Outstanding (in thousands) Outstanding (in thousands)Series X September 2017 September 2022 5.250% 9,200  230,000  9,200  230,000 Series Y December 2017 December 2022 5.200% 8,000  200,000  8,000  200,000 Series Z November 2019 November 2024 4.875% 13,000  325,000  13,000  325,000 Series W October 2016 November 2021 (Redeemed) 5.200% — — 7,590  189,750 Total 30,200  $ 755,000  37,790  $ 944,750

Stock Compensation (Tables)

Stock Compensation (Tables)	12 Months Ended
	Dec. 31, 2021
Stock Compensation [Abstract]
Schedule of Valuation Assumptions	2021 2020 2019Stock option expense for the year ( in 000's) $ 712  $ 412  $ 299 Aggregate exercise date intrinsic value of options exercised during the year (in 000's) $ 4,559  $ 305  $ 1,567  Average assumptions used in valuing options with the Black-Scholes method: Expected life of options in years, based upon historical experience 5  5  5 Risk-free interest rate 0.8% 0.4% 2.0%Expected volatility, based upon historical volatility 15.4% 22.3% 22.2%Expected dividend yield 2.6% 3.3% 2.6% Average estimated value of options granted during the year $ 14.40  $ 15.27  $ 26.85
Summary of Stock Options Activity	Weighted Aggregate Weighted Average Intrinsic Number of Average Remaining ValueOptions:Options Exercise Price Contract Life (in thousands) Outstanding at December 31, 2018 143,415  $ 86.42  Granted 34,000  $ 163.95  Exercised (15,585) $ 62.15  Forfeited (4,000) $ 110.04  Outstanding at December 31, 2019 157,830  $ 104.92  Granted 18,000  $ 127.22  Exercised (4,136) $ 62.69  Forfeited — $— Outstanding at December 31, 2020 171,694  $ 108.29  Granted 38,000  $ 162.63  Exercised (55,546) $ 90.24  Forfeited — $— Special cash dividend adjustment (1) 5,422  $ 124.13  Outstanding at December 31, 2021 159,570  $ 123.87  6.21 Years $ 9,622 Exercisable at December 31, 2021 (1) 79,651  $ 99.71  3.98 Years $ 6,727 ____________________________ (1)In accordance with the applicable equity award plan documents, the number and exercise price of outstanding options have been adjusted because of the Special Cash Dividend so that the option holder maintains their economic position with respect to the stockholders.
Nonvested Restricted Stock Units	Weighted Number of Average GrantRestricted Stock Units:RSUs Date Fair Value Nonvested at December 31, 2018 243,290  $ 23,386 Granted 6,400  1,137 Vested (95,500) (8,753)Forfeited (3,342) (345)Nonvested at December 31, 2019 150,848  15,425 Granted 46,036  5,562 Vested (73,256) (6,991)Forfeited (2,120) (290)Nonvested at December 31, 2020 121,508  $ 13,706 Granted 76,266  11,948 Vested (61,243) (6,255)Forfeited (17,940) (2,107)Nonvested at December 31, 2021 118,591  $ 17,292
Schedule of Restricted Stock Unit Activity	(In thousands, except number of shares) 2021 2020 2019Restricted stock unit expense $ 6,685  $ 4,475  $ 3,196 Shares of common stock issued upon vesting 35,714  43,458  55,267 Fair value of vested common stock on vesting date $ 9,474  $ 10,350  $ 15,078 Cash paid for taxes in lieu of shares of common stock withheld upon vesting of RSUs $ 3,940  $ 4,216  $ 6,350

Organization And Description _2

Organization And Description Of Business (Narrative) (Details) ft² in Thousands, shares in Millions	12 Months Ended
	Dec. 31, 2021ft²itempropertystateshares
Organization And Description Of Business [Line Items]
The Company's ownership percentage of the limited partnership	79.10%
Rentable area (in square feet) | ft²	27,712
Number of states with rentable commercial space | state	6
Number of parks | item	97
Number of buildings | item	666
Managed Properties [Member]
Organization And Description Of Business [Line Items]
Rentable area (in square feet) | ft²	300
Highgate at the Mile [Member]
Organization And Description Of Business [Line Items]
Number of units developed | property	395
Brentford at The Mile [Member]
Organization And Description Of Business [Line Items]
Number of units developed | property	411
JV Partner [Member] | Highgate at the Mile [Member]
Organization And Description Of Business [Line Items]
Economic interest in joint venture, percentage	5.00%
JV Partner [Member] | Brentford at The Mile [Member]
Organization And Description Of Business [Line Items]
Economic interest in joint venture, percentage	1.80%
PS [Member]
Organization And Description Of Business [Line Items]
Shares owned by Public Storage | shares	7.2
Affiliate's percent ownership of the Company's common equity	41.40%
Aggregate shares owned if partnership units are redeemed | shares	14.5
Investment in Joint Venture [Member] | Highgate at the Mile [Member]
Organization And Description Of Business [Line Items]
Economic interest in joint venture, percentage	95.00%
Investment in Joint Venture [Member] | Brentford at The Mile [Member]
Organization And Description Of Business [Line Items]
Economic interest in joint venture, percentage	98.20%

Basis Of Presentation And Sum_4

Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details)	12 Months Ended				24 Months Ended
	Dec. 31, 2021USD ($)segmentpropertyshares	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2021USD ($)customer	Aug. 31, 2020USD ($)
Summary Of Significant Accounting Policies [Line Items]
Common units in operating partnership | shares	7,305,355
Land and building held for development, net	$ 78,990,000	$ 37,922,000			$ 78,990,000
Cash and cash equivalents maximum benchmark (in months)	3 months
Minimum expected future benefit period on expenditures cost to be capitalized and depreciated (in years)	2 years
Minimum expected future benefit period on transaction cost to be capitalized and depreciated (in years)	1 year
Below market lease, net	$ 2,800,000	2,200,000			2,800,000
Below market leases, accumulated amortization	13,100,000	12,200,000			13,100,000
Impairment on assets		0	$ 0	$ 0
Operating lease, right-of-use asset	$ 1,300,000	$ 1,500,000			$ 1,300,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets			Other Assets
Operating lease, liability	$ 1,300,000	$ 1,500,000			$ 1,300,000
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities			Accounts Payable and Accrued Liabilities
Accumulated amortization	$ 300,000	$ 200,000			$ 300,000
Accounts receivable, write-off	100,000	1,600,000	1,100,000
Deferred rent receivable, write-off	300,000	3,100,000	500,000
Rental income	438,703,000	415,623,000	429,846,000
Rental income, operating leases	333,900,000	319,200,000	333,300,000
Rental income, variable lease payments	104,800,000	96,400,000	$ 96,500,000
Income tax expense	0
Tax benefit for uncertain tax positions	$ 0	0
Number of operating segments | segment	2
Number of reportable segments | segment	1
Deferred rent receivable		5,700,000
Rent receivable abated	$ 300,000
Gross real estate investment property	3,106,482,000	2,924,660,000			3,106,482,000
Properties held for sale, net	33,609,000	75,138,000			$ 33,609,000
Reclassification [Member]
Summary Of Significant Accounting Policies [Line Items]
Land and building held for development, net		(5,100,000)
Gross real estate investment property		(70,000,000)
Properties held for sale, net		75,100,000
COVID-19 [Member]
Summary Of Significant Accounting Policies [Line Items]
Deferral agreement, number of customers | customer					317
Deferral agreement, percentage of customers on a percentage of total rental income basis					9.50%
Deferred rent receivable	500,000				$ 6,200,000
Rent receivable abated		1,300,000			1,600,000
Deferred payments received					$ 5,300,000
Collection rate percentage on deferral repayments					99.80%
Deferred payments to be repaid thereafter					$ 900,000
Above Market Leases [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived intangible assets, net	600,000	1,200,000			600,000
Finite-lived intangible assets, accumulated amortization	(11,600,000)	(11,100,000)			(11,600,000)
Acquired In Place Leases [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived intangible assets, net	6,000,000	5,300,000			6,000,000
Finite-lived intangible assets, accumulated amortization	$ 10,500,000	7,200,000			$ 10,500,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life (in years)	5 years
Operating lease, expiration date	2029
Operating lease, remaining lease term	7 years 9 months 18 days
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life (in years)	30 years
Operating lease, expiration date	2030
Operating lease, remaining lease term	8 years 1 month 6 days
Highgate at the Mile [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of units developed | property	395
Highgate at the Mile [Member] | JV Partner [Member]
Summary Of Significant Accounting Policies [Line Items]
Consolidated entity ownership percentage	5.00%				5.00%
Brentford at The Mile [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of units developed | property	411
Gross real estate investment property	$ 5,100,000				$ 5,100,000	$ 5,100,000
Brentford at The Mile [Member] | JV Partner [Member]
Summary Of Significant Accounting Policies [Line Items]
Consolidated entity ownership percentage	1.80%				1.80%
Investment in Joint Venture [Member] | Highgate at the Mile [Member]
Summary Of Significant Accounting Policies [Line Items]
Consolidated entity ownership percentage	95.00%				95.00%
Investment in Joint Venture [Member] | Brentford at The Mile [Member]
Summary Of Significant Accounting Policies [Line Items]
Consolidated entity ownership percentage	98.20%				98.20%
Land and building held for development, net	$ 59,900,000	$ 15,100,000			$ 59,900,000

Basis Of Presentation And Sum_5

Basis Of Presentation And Summary Of Significant Accounting Policies (Reconciliation of Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Cash and cash equivalents	$ 27,074	$ 69,083	$ 62,786
Restricted cash included in Land and building held for development, net	1,088	1,088	1,088	$ 1,100
Cash and cash equivalents and restricted cash at the end of the period	$ 28,162	$ 70,171	$ 63,874	$ 38,467

Basis Of Presentation And Sum_6

Basis Of Presentation And Summary Of Significant Accounting Policies (Calculation Of Earnings Per Share) (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Calculation of net income allocable to common stockholders
Net income	$ 553,029	$ 206,705	$ 203,972
Net (income) loss allocated to Preferred stockholders based upon distributions	(46,624)	(48,186)	(54,346)
Net income allocated to Preferred shareholders based upon redemptions	(6,434)		(11,007)
Net (income) loss allocated to Noncontrolling interests - joint venture	20	(17)	(44)
Net (income) loss allocated to Restricted stock unit holders	(2,613)	(716)	(910)
Net income allocable to common stockholders and noncontrolling interests - common units	497,378	157,786	137,665
Net income allocation to noncontrolling interests - common units	(104,290)	(33,141)	(28,962)
Net income allocable to common stockholders	$ 393,088	$ 124,645	$ 108,703
Calculation of common partnership units as a percentage of common stock equivalents
Weighted average common stock outstanding	27,534	27,475	27,418
Weighted average common partnership units outstanding	7,305	7,305	7,305
Total common stock equivalents	34,839	34,780	34,723
Common partnership units as a percentage of common stock equivalents	21.00%	21.00%	21.00%
Weighted average common stock outstanding
Weighted average common stock outstanding	27,534	27,475	27,418
Net effect of dilutive stock compensation - based on treasury stock method using average market price	102	88	108
Diluted weighted average common stock outstanding	27,636	27,563	27,526

Real Estate Facilities (Narrati

Real Estate Facilities (Narrative) (Details) $ in Thousands

Dec. 30, 2021USD ($)ft²

Dec. 29, 2021USD ($)ft²

Oct. 19, 2021USD ($)ft²

Sep. 17, 2021USD ($)ft²

Jul. 16, 2021USD ($)ft²

Jun. 17, 2021USD ($)ft²

Sep. 16, 2020USD ($)ft²item

Jan. 07, 2020USD ($)ft²

Oct. 08, 2019USD ($)ft²

Dec. 31, 2021USD ($)aft²property

Dec. 31, 2020USD ($)ft²

Dec. 31, 2019USD ($)

Nov. 18, 2021USD ($)ft²

Sep. 01, 2021USD ($)ft²

Oct. 28, 2020USD ($)ft²

Jan. 10, 2020USD ($)ft²

Dec. 20, 2019USD ($)ft²

Sep. 05, 2019USD ($)ft²

Apr. 18, 2019USD ($)ft²

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

27,712,000

Federal income tax basis of real estate facilities

$ 1,700,000

Committed transaction costs for executed leases

9,800

Purchase price

148,868

$ 60,095

$ 134,942

Gross real estate investment property

3,106,482

2,924,660

Proceeds from sale of real estate facilities

400,955

40,674

144,599

Gain on sale of real estate facilities

$ 359,875

$ 27,273

$ 16,644

Plano Acquisition [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

141,000

Purchase price

$ 25,600

Alexandria Acquisition [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

246,000

Purchase price

$ 46,600

Grapevine Acquisition [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

718,000

Purchase price

$ 123,300

La Mirada Acquisition [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

73,000

Purchase price

$ 13,500

Santa Clara Acquisition [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

79,000

Purchase price

$ 16,800

Santa Fe Springs Acquisition [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

543,000

Purchase price

$ 104,300

Signal Hill Acquisition [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

74,000

Purchase price

$ 13,800

Metro Park North [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

113,000

Proceeds from sale of real estate facilities

$ 29,300

Gain on sale of real estate facilities

$ 19,600

Rockville and Silver Spring Business Parks [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

1,300,000

Proceeds from sale of real estate facilities

$ 144,600

Gain on sale of real estate facilities

$ 16,600

Highgate at the Mile [Member]

Real Estate Facilities [Line Items]

Number of units developed | property

395

Area of land (in acres) | a

5

Highgate at the Mile [Member] | Investment in Joint Venture [Member]

Real Estate Facilities [Line Items]

Economic interest in joint venture, percentage

95.00%

Highgate at the Mile [Member] | JV Partner [Member]

Real Estate Facilities [Line Items]

Economic interest in joint venture, percentage

5.00%

Beltsville, MD [Member] | Industrial Property [Member]

Real Estate Facilities [Line Items]

Area of real estate property (in square feet) | ft²

53,000

Proceeds from sale of real estate facilities

$ 4,500

Gain on sale of real estate facilities

$ 3,200

Irving, TX [Member] | Industrial Property [Member]

Real Estate Facilities [Line Items]

Area of real estate property (in square feet) | ft²

83,000

Development costs incurred

$ 8,100

Gross real estate investment property

$ 9,100

Irving, TX [Member] | Industrial-Flex Business Park [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

772,000

Area of real estate property (in square feet) | ft²

70,000

22,000

Proceeds from sale of real estate facilities

$ 8,800

$ 3,400

Gain on sale of real estate facilities

$ 6,300

$ 2,900

San Diego, CA [Member] | Industrial-Flex Business Park [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

371,000

Area of real estate property (in square feet) | ft²

371,000

Proceeds from sale of real estate facilities

$ 311,100

Gain on sale of real estate facilities

$ 301,300

Herndon, VA [Member] | Office Business Park [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

244,000

Area of real estate property (in square feet) | ft²

244,000

Proceeds from sale of real estate facilities

$ 40,500

Gain on sale of real estate facilities

$ 27,000

Chantilly, VA [Member] | Office Oriented Flex Business Park [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

198,000

Area of real estate property (in square feet) | ft²

198,000

Proceeds from sale of real estate facilities

$ 32,600

Gain on sale of real estate facilities

$ 19,200

Redmond, WA [Member] | Industrial Property [Member]

Real Estate Facilities [Line Items]

Rentable area (in square feet) | ft²

40,000

Number of buildings sold | item

2

Proceeds from sale of real estate facilities

$ 11,400

Gain on sale of real estate facilities

$ 7,700

Kent, WA [Member] | Industrial Property [Member]

Real Estate Facilities [Line Items]

Area of real estate property (in square feet) | ft²

83,000

Development costs incurred

$ 2,200

Estimated development costs

15,400

Contractual construction commitments

$ 1,200

Boca Raton, FL [Member] | Industrial Property [Member]

Real Estate Facilities [Line Items]

Area of real estate property (in square feet) | ft²

17,000

Development costs incurred

$ 1,100

Estimated development costs

4,000

Contractual construction commitments

$ 2,900

Real Estate Facilities (Activit

Real Estate Facilities (Activity In Real Estate Facilities) (Details) ft² in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)ft²	Dec. 31, 2020USD ($)ft²	Dec. 31, 2019USD ($)
Property, Plant and Equipment [Line Items]
Beginning Balances	$ 1,822,921	$ 1,816,366	$ 1,730,389
Accumulated Depreciation, Beginning Balances	(1,101,739)
Acquisition of real estate facilities	146,302	57,429	132,406
Capital expenditures	37,976	36,328	40,092
Depreciation and amortization expense	(90,175)	(90,058)	(93,416)
Transfers from property held for development	9,052
Transfer to properties held for sale	2,009	2,856	6,895
Accumulated Depreciation, Ending Balances	(1,178,397)	(1,101,739)
Ending Balances	1,928,085	1,822,921	1,816,366
Properties held for sale, net	$ 33,609	75,138
Rentable area (in square feet) | ft²	27,712
Land [Member]
Property, Plant and Equipment [Line Items]
Beginning Balances	$ 843,765	813,504	725,411
Acquisition of real estate facilities	22,591	30,261	88,093
Capital expenditures
Disposals
Depreciation and amortization expense
Transfers from property held for development	989
Transfer to properties held for sale
Ending Balances	867,345	843,765	813,504
Buildings And Improvements [Member]
Property, Plant and Equipment [Line Items]
Beginning Balances	2,080,895	2,038,471	1,973,658
Acquisition of real estate facilities	123,711	27,168	44,313
Capital expenditures	37,976	36,328	40,092
Disposals	(9,892)	(19,399)	(15,796)
Transfers from property held for development	8,063
Transfer to properties held for sale	(1,616)	(1,673)	(3,796)
Ending Balances	2,239,137	2,080,895	2,038,471
Accumulated Depreciation [Member]
Property, Plant and Equipment [Line Items]
Accumulated Depreciation, Beginning Balances	(1,101,739)	(1,035,609)	(968,680)
Accumulated Depreciation, Disposals	9,892	19,399	15,796
Depreciation and amortization expense	(90,175)	(90,058)	(93,416)
Transfer to properties held for sale	3,625	4,529	10,691
Accumulated Depreciation, Ending Balances	$ (1,178,397)	(1,101,739)	$ (1,035,609)
Reclassification [Member]
Property, Plant and Equipment [Line Items]
Properties held for sale, net		75,100
Reclassification [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Properties held for sale, net		30,900
Reclassification [Member] | Buildings And Improvements [Member]
Property, Plant and Equipment [Line Items]
Properties held for sale, net		166,500
Reclassification [Member] | Accumulated Depreciation [Member]
Property, Plant and Equipment [Line Items]
Properties held for sale, net		$ 127,400
Irving, TX [Member] | Industrial-Flex Business Park [Member]
Property, Plant and Equipment [Line Items]
Rentable area (in square feet) | ft²		772
Irving, TX [Member] | Single-Tenant Industrial-Flex Building [Member]
Property, Plant and Equipment [Line Items]
Rentable area (in square feet) | ft²		22
San Diego, CA [Member] | Industrial-Flex Business Park [Member]
Property, Plant and Equipment [Line Items]
Rentable area (in square feet) | ft²		371
Herndon, VA [Member] | Office Business Park [Member]
Property, Plant and Equipment [Line Items]
Rentable area (in square feet) | ft²		244
Chantilly, VA [Member] | Office Oriented Flex Business Park [Member]
Property, Plant and Equipment [Line Items]
Rentable area (in square feet) | ft²		198
Beltsville, MD [Member] | Industrial Building [Member]
Property, Plant and Equipment [Line Items]
Rentable area (in square feet) | ft²		53

Real Estate Facilities (Summary

Real Estate Facilities (Summary Of Real Estate Assets Acquired And Liabilities Assumed) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Real Estate Facilities [Abstract]
Land	$ 22,591	$ 30,261	$ 88,093
Buildings and improvements	123,711	27,168	44,313
Other assets (above-market in-place rents)		523
Accrued and other liabilities (below-market in-place rents)	(1,457)	(557)	(1,241)
Other assets (in-place lease value)	4,023	2,700	3,777
Total purchase price	148,868	60,095	134,942
Net operating assets acquired and liabilities assumed	(1,166)	(76)	(664)
Total cash paid	$ 147,702	$ 60,019	$ 134,278

Multifamily Developmental Act_2

Multifamily Developmental Activity (Narrative) (Details) - Brentford at The Mile [Member] $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2020USD ($)	Dec. 31, 2021USD ($)property
Real Estate Facilities [Line Items]
Number of Units in Multi-Family Asset | property		411
Value of property contributed	$ 18.5
Development costs incurred		$ 54.8
Development cost incurred, inclusive of land cost		$ 39.3
Investment in Joint Venture [Member]
Real Estate Facilities [Line Items]
Economic interest in joint venture, percentage		98.20%
JV Partner [Member]
Real Estate Facilities [Line Items]
Economic interest in joint venture, percentage		1.80%
Minimum [Member]
Real Estate Facilities [Line Items]
Period to complete construction	24 months
Maximum [Member]
Real Estate Facilities [Line Items]
Period to complete construction	36 months

Leasing Activity (Narrative) (D

Leasing Activity (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Leased Assets [Line Items]
Rental income, variable lease payments	$ 104.8	$ 96.4	$ 96.5
Percentage of leased asset subjected to termination options	2.50%
Percentage of leased asset exercisable in period	1.60%
Termination option, exercisable through date	Dec. 31, 2022
Minimum [Member]
Operating Leased Assets [Line Items]
Non-cancelable lease term	1 year
Maximum [Member]
Operating Leased Assets [Line Items]
Non-cancelable lease term	10 years

Leasing Activity (Summary Of Fu

Leasing Activity (Summary Of Future Minimum Rental Income Excluding Recovery Of Operating Expenses) (Details) $ in Thousands	Dec. 31, 2021USD ($)
Leasing Activity [Abstract]
2022	$ 290,712
2023	226,498
2024	160,933
2025	100,741
2026	66,388
Thereafter	107,051
Total	$ 952,323

Bank Loans (Narrative) (Details

Bank Loans (Narrative) (Details)	12 Months Ended
	Dec. 31, 2021USD ($)item	Jul. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Line of Credit Facility [Line Items]
Payment of deferred financing costs	$ 2,248,000
Wells Fargo Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit, borrowing limit	$ 400,000,000	$ 250,000,000
Number of six-month extension options | item	2
Number of twelve-month extension options | item	1
Spread over LIBOR	0.70%
Line of credit, facility fee percent	0.10%
Sustainability-linked pricing component, pricing improvement percentage	0.01%
Option to increase commitments, additional amount	$ 300,000,000
Credit facility, outstanding	$ 32,000,000		$ 0
Credit Facility, interest rate	0.80%
Payment of deferred financing costs	$ 2,200,000
Unamortized loan origination costs	$ 2,100,000		$ 200,000
Wells Fargo Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Spread over LIBOR	0.70%
Line of credit, facility fee percent	0.10%
Wells Fargo Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Spread over LIBOR	1.35%
Line of credit, facility fee percent	0.25%

Noncontrolling Interests (Narra

Noncontrolling Interests (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Noncontrolling Interests [Line Items]
Common units in operating partnership		7,305,355
Noncontrolling interests	$ 259,615	$ 259,615	$ 218,963
Distributions paid to noncontrolling interests per common unit	$ 1.05
Number of shares of common stock for each unit of limited partnership interest redeemed	1	1
Net income allocation to noncontrolling interests - common units		$ 104,290	33,141	$ 28,962
PS [Member]
Noncontrolling Interests [Line Items]
Noncontrolling interests	$ 255,700	255,700	215,700
JV Partner [Member]
Noncontrolling Interests [Line Items]
Noncontrolling interests	3,900	3,900	3,300
Brentford at The Mile [Member] | JV Partner [Member]
Noncontrolling Interests [Line Items]
Noncontrolling interests	$ 700	$ 700	$ 500	$ 0
Special Cash Dividend [Member]
Noncontrolling Interests [Line Items]
Distributions paid to noncontrolling interests per common unit		$ 4.60

Related Party Transactions (Nar

Related Party Transactions (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)item	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Related Party Transaction [Line Items]
Interest and other income	$ 2,536	$ 1,234	$ 4,492
Royalty-free license agreement written notice of termination period minimum (in months)	6 months
Number of assets owned that are maintained by Public Storage | item	2
Property management contract written notice of termination period minimum (in days)	60 days
Management fee expenses	$ 100	100	100
Costs allocated from related party	100	100	100
Reimbursement to related party	1,400	1,200	1,200
Property Management [Member]
Related Party Transaction [Line Items]
Interest and other income	300	300	300
Operating expenses allocated to operating party	300	400	400
Maximum [Member]
Related Party Transaction [Line Items]
Reimbursement from related party	100	100	$ 100
Due from related parties	200	200
Due to related parties	$ 100	$ 100

Stockholders_ Equity (Preferred

Stockholders’ Equity (Preferred Stock) (Narrative) (Details)	Nov. 03, 2021USD ($)	Dec. 30, 2019USD ($)	Nov. 04, 2019USD ($)$ / sharesshares	Dec. 31, 2021USD ($)$ / shares	Dec. 31, 2021USD ($)item$ / shares	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Class of Stock [Line Items]
Shares Amount				$ 755,000,000	$ 755,000,000	$ 944,750,000
Redeemable preferred stock, redemption price per share | $ / shares				$ 25	$ 25
Preferred Redemption allocation					$ 6,434,000		$ 11,007,000
Proceeds from Issuance of Redeemable Preferred Stock							316,038,000
Distributions paid to noncontrolling interests per common unit | $ / shares				$ 1.05
Distributions paid to noncontrolling interests — common units					64,287,000	30,683,000	30,683,000
Distributions to preferred stockholders					$ 46,624,000	48,186,000	$ 54,346,000
Number of quarterly dividends in arrearage before preferred stockholders can elect additional board members | item					6
Number of additional board members the preferred stockholders can elect in the case of an excess arrearage of quarterly dividends | item					2
Dividends in arrears					$ 0
Series W Preferred Stock [Member]
Class of Stock [Line Items]
Cumulative preferred stock, dividend rate	5.20%				5.20%
Shares Amount	$ 189,800,000					189,750,000
Series U Preferred Stock [Member]
Class of Stock [Line Items]
Cumulative preferred stock, dividend rate		5.75%
Shares Amount		$ 230,000,000
Series V Preferred Stock [Member]
Class of Stock [Line Items]
Cumulative preferred stock, dividend rate		5.70%
Shares Amount		$ 110,000,000
Series Z Preferred Stock [Member]
Class of Stock [Line Items]
Cumulative preferred stock, dividend rate			4.875%		4.875%
Shares Amount			$ 325,000,000	$ 325,000,000	$ 325,000,000	$ 325,000,000
Redeemable preferred stock, redemption price per share | $ / shares			$ 25
Number of stock issued in sale | shares			13,000,000
Non-callable period for Preferred Units			5 years
Mandatory redemption | shares			0
Proceeds from Issuance of Redeemable Preferred Stock			$ 316,000,000

Stockholders_ Equity (Common St

Stockholders’ Equity (Common Stock And Units And Equity Stock) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Shareholders' Equity [Line Items]
Distributions paid to common stockholders	$ 242,595	$ 115,396	$ 115,154
Dividends paid per share of common stock	$ 8.80	$ 4.20	$ 4.20
Distributions paid to noncontrolling interests — common units	$ 64,287	$ 30,683	$ 30,683
Percentage of distributions classified as ordinary income	35.00%	100.00%	100.00%
Percentage of distributions classified as long-term capital gain income	65.00%	0.00%	0.00%
Equity stock, shares authorized	100,000,000
Equity stock, shares issued	0	0
Common Units [Member]
Shareholders' Equity [Line Items]
Dividends paid per common unit	$ 8.80	$ 4.20	$ 4.20

Stockholders_ Equity (Schedule

Stockholders’ Equity (Schedule Of Preferred Stock Outstanding) (Details) - USD ($) $ in Thousands	Nov. 03, 2021	Nov. 04, 2019	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Shares Outstanding			30,200	37,790
Shares Amount			$ 755,000	$ 944,750
Series X Preferred Stock [Member]
Class of Stock [Line Items]
Issuance Date			Sep. 1, 2017
Earliest Potential Redemption Date			Sep. 1, 2022
Dividend Rate			5.25%
Shares Outstanding			9,200	9,200
Shares Amount			$ 230,000	$ 230,000
Series Y Preferred Stock [Member]
Class of Stock [Line Items]
Issuance Date			Dec. 1, 2017
Earliest Potential Redemption Date			Dec. 1, 2022
Dividend Rate			5.20%
Shares Outstanding			8,000	8,000
Shares Amount			$ 200,000	$ 200,000
Series Z Preferred Stock [Member]
Class of Stock [Line Items]
Issuance Date			Nov. 1, 2019
Earliest Potential Redemption Date			Nov. 1, 2024
Dividend Rate		4.875%	4.875%
Shares Outstanding			13,000	13,000
Shares Amount		$ 325,000	$ 325,000	$ 325,000
Series W Preferred Stock [Member]
Class of Stock [Line Items]
Issuance Date			Oct. 1, 2016
Earliest Potential Redemption Date			Nov. 1, 2021
Dividend Rate	5.20%		5.20%
Shares Outstanding				7,590
Shares Amount	$ 189,800			$ 189,750

Stock Compensation (Narrative)

Stock Compensation (Narrative) (Details) $ in Thousands	Apr. 05, 2021USD ($)	Mar. 01, 2021USD ($)	Apr. 30, 2021USD ($)shares	Mar. 31, 2020	Apr. 30, 2019USD ($)shares	Feb. 22, 2022shares	Dec. 31, 2021USD ($)itemshares	Dec. 31, 2020USD ($)shares	Dec. 31, 2019USD ($)shares	Dec. 31, 2018shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from the exercise of stock options | $							$ 5,012	$ 258	$ 969
Cash paid for taxes in lieu of shares upon vesting of RSU's | $							$ 3,940	4,216	$ 6,350
Stock Options and Restricted Stock Units [Member] | President and CEO [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense | $								$ 1,700
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period							10 years
Options granted							38,000	18,000	34,000
Options exercised							55,546	4,136	15,585
Options forfeited									4,000
Options outstanding							159,570	171,694	157,830	143,415
Unamortized compensation expense | $							$ 900
Weighted average recognized period of unamortized compensation expenses (in years)							3 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							5 years
Unamortized compensation expense | $							$ 12,600
Weighted average recognized period of unamortized compensation expenses (in years)							3 years 3 months 18 days
Stock units granted							76,266	46,036	6,400
Stock units vested							61,243	73,256	95,500
Stock units forfeited							17,940	2,120	3,342
Restricted Stock Units (RSUs) [Member] | President and CEO [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted			41,186
Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
Restricted Stock Units (RSUs) [Member] | Chief Accounting Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted							3,053
Restricted Stock Units (RSUs) [Member] | Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted							10,955
Stock units forfeited							14,070
Restricted Stock Units (RSUs) [Member] | Divisional Vice Presidents [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted							16,970
Restricted Stock Units (RSUs) Prior to 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							6 years
Restricted Stock Units (RSUs) Prior to 2016 [Member] | Year Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							20.00%
Restricted Stock Units (RSUs) Prior to 2016 [Member] | Year Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							20.00%
Restricted Stock Units (RSUs) Prior to 2016 [Member] | Year Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							20.00%
Restricted Stock Units (RSUs) Prior to 2016 [Member] | Year Five [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							20.00%
Restricted Stock Units (RSUs) Prior to 2016 [Member] | Year Six [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							20.00%
Restricted Stock Units (RSUs) During 2016 [Member] | Year One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							20.00%
Restricted Stock Units (RSUs) During 2016 [Member] | Year Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							20.00%
Restricted Stock Units (RSUs) During 2016 [Member] | Year Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							20.00%
Restricted Stock Units (RSUs) During 2016 [Member] | Year Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							20.00%
Restricted Stock Units (RSUs) During 2016 [Member] | Year Five [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							20.00%
Restricted Stock Units (RSUs) Subsequent to 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							3 years
Restricted Stock Units (RSUs) Subsequent to 2016 [Member] | Year One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							0.33%
Restricted Stock Units (RSUs) Subsequent to 2016 [Member] | Year Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							0.33%
Restricted Stock Units (RSUs) Subsequent to 2016 [Member] | Year Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							0.33%
Sign-On Award [Member] | Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value | $	$ 3,700
Retention Award [Member] | Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value | $	$ 2,900
Incentive Program [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value | $		$ 3,600
Number of annual vesting installments | item							5
Retirement Plan for Non-Employee Directors [Member] | Restricted Stock Units (RSUs) [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense | $							$ 1,100	$ 800	$ 1,500
Issuance of common stock in connection with stock-based compensation, shares			10,000		8,000		1,000
Aggregate fair value of the shares issued | $			$ 1,600		$ 1,200
Subsequent Event [Member] | Incentive Program [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units granted						25,140
Minimum [Member] | Incentive Program [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Possible target award adjustment based on strategic and operational accomplishments				75.00%
Maximum [Member] | Incentive Program [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Possible target award adjustment based on strategic and operational accomplishments				125.00%
Maximum [Member] | Retirement Plan for Non-Employee Directors [Member] | Restricted Stock Units (RSUs) [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock in connection with stock-based compensation, shares							10,000
Special Cash Dividend [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense | $							$ 100

Stock Compensation (Schedule of

Stock Compensation (Schedule of Valuation Assumptions) (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock option expense for the year ( in 000's)	$ 712	$ 412	$ 299
Aggregate exercise date intrinsic value of options exercised during the year ( in 000's)	$ 4,559	$ 305	$ 1,567
Expected life of options in years, based upon historical experience	5 years	5 years	5 years
Risk-free interest rate	0.80%	0.40%	2.00%
Expected volatility, based upon historical volatility	15.40%	22.30%	22.20%
Expected dividend yield	2.60%	3.30%	2.60%
Average estimated value of options granted during the year	$ 14.40	$ 15.27	$ 26.85

Stock Compensation (Summary of

Stock Compensation (Summary of Stock Options Activity) (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding Beginning Balance	171,694	157,830	143,415
Number of Options, Granted	38,000	18,000	34,000
Number of Options, Exercised	(55,546)	(4,136)	(15,585)
Number of Options, Forfeited			(4,000)
Number of options, Special dividend adjustment	5,422
Number of Options, Outstanding Ending Balance	159,570	171,694	157,830
Number of Options, Exercisable at December 31,	79,651
Weighted Average Exercise Price, Outstanding Beginning Balance	$ 108.29	$ 104.92	$ 86.42
Weighted Average Exercise Price, Granted	162.63	127.22	163.95
Weighted Average Exercise Price, Exercised	90.24	62.69	62.15
Weighted Average Exercise Price, Forfeited			110.04
Weighted Average Exercise Price, Special dividend adjustment	124.13
Weighted Average Exercise Price, Outstanding Ending Balance	123.87	$ 108.29	$ 104.92
Weighted Average Exercise Price, Exercisable at December 31,	$ 99.71
Weighted Average Remaining Contract Life, Outstanding at December 31,	6 years 2 months 15 days
Weighted Average Remaining Contract Life, Exercisable at December 31,	3 years 11 months 23 days
Aggregate Intrinsic Value, Outstanding at December 31,	$ 9,622
Aggregate Intrinsic Value, Exercisable at December 31,	$ 6,727

Stock Compensation (Nonvested R

Stock Compensation (Nonvested Restricted Stock Units) (Details) - Restricted Stock Units (RSUs) [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSUs, Nonvested Beginning Balance	121,508	150,848	243,290
Number of RSUs, Granted	76,266	46,036	6,400
Number of RSUs, Vested	(61,243)	(73,256)	(95,500)
Number of RSUs, Forfeited	(17,940)	(2,120)	(3,342)
Number of RSUs, Nonvested Ending Balance	118,591	121,508	150,848
Weighted Average Grant Date Fair Value, Nonvested Beginning Balance	$ 13,706	$ 15,425	$ 23,386
Weighted Average Grant Date Fair Value, Granted	11,948	5,562	1,137
Weighted Average Grant Date Fair Value, Vested	(6,255)	(6,991)	(8,753)
Weighted Average Grant Date Fair Value, Forfeited	(2,107)	(290)	(345)
Weighted Average Grant Date Fair Value, Nonvested Ending Balance	$ 17,292	$ 13,706	$ 15,425

Stock Compensation (Schedule _2

Stock Compensation (Schedule of Restricted Stock Unit Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares issued upon vesting	27,589,807	27,488,547
Cash paid for taxes in lieu of shares upon vesting of RSU's	$ 3,940	$ 4,216	$ 6,350
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share unit expense	$ 6,685	$ 4,475	$ 3,196
Common shares issued upon vesting	35,714	43,458	55,267
Fair value of vested shares on vesting date	$ 9,474	$ 10,350	$ 15,078

Schedule III - Real Estate An_2

Schedule III - Real Estate And Accumulated Depreciation (Real Estate And Accumulated Depreciation) (Details) ft² in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)ft²property
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	27,712
Initial Cost to Company, Land	$ 880,028
Initial Cost to Company, Buildings and Improvements	1,812,241
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	501,631
Gross Carrying Amount at December 31, 2021, Land	880,028
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	2,313,872
Gross Carrying Amount at December 31, 2021, Total	3,193,900
Accumulated Depreciation	$ 1,234,682
Commercial Real Estate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	27,010
Initial Cost to Company, Land	$ 845,531
Initial Cost to Company, Buildings and Improvements	1,678,797
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	475,368
Gross Carrying Amount at December 31, 2021, Land	845,531
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	2,154,165
Gross Carrying Amount at December 31, 2021, Total	2,999,696
Accumulated Depreciation	1,167,824
Real Estate Facilities [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost to Company, Land	867,345
Initial Cost to Company, Buildings and Improvements	1,763,720
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	475,417
Gross Carrying Amount at December 31, 2021, Land	867,345
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	2,239,137
Gross Carrying Amount at December 31, 2021, Total	3,106,482
Accumulated Depreciation	$ 1,178,397
Buena Park Industrial Center [Member] | Commercial Real Estate [Member] | Buena Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	317
Initial Cost to Company, Land	$ 3,245
Initial Cost to Company, Buildings and Improvements	7,703
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,663
Gross Carrying Amount at December 31, 2021, Land	3,245
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	11,366
Gross Carrying Amount at December 31, 2021, Total	14,611
Accumulated Depreciation	$ 8,982
Year(s) Acquired	1997
Carson [Member] | Commercial Real Estate [Member] | Carson, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	77
Initial Cost to Company, Land	$ 990
Initial Cost to Company, Buildings and Improvements	2,496
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,805
Gross Carrying Amount at December 31, 2021, Land	990
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	4,301
Gross Carrying Amount at December 31, 2021, Total	5,291
Accumulated Depreciation	$ 3,591
Year(s) Acquired	1997
Cerritos Business Center [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	395
Initial Cost to Company, Land	$ 4,218
Initial Cost to Company, Buildings and Improvements	10,273
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,952
Gross Carrying Amount at December 31, 2021, Land	4,218
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	15,225
Gross Carrying Amount at December 31, 2021, Total	19,443
Accumulated Depreciation	$ 12,417
Year(s) Acquired	1997
Cerritos/Edwards [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	31
Initial Cost to Company, Land	$ 450
Initial Cost to Company, Buildings and Improvements	1,217
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,728
Gross Carrying Amount at December 31, 2021, Land	450
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	2,945
Gross Carrying Amount at December 31, 2021, Total	3,395
Accumulated Depreciation	$ 2,443
Year(s) Acquired	1997
Concord Business Park [Member] | Commercial Real Estate [Member] | Concord, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	246
Initial Cost to Company, Land	$ 12,454
Initial Cost to Company, Buildings and Improvements	20,491
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,282
Gross Carrying Amount at December 31, 2021, Land	12,454
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	21,773
Gross Carrying Amount at December 31, 2021, Total	34,227
Accumulated Depreciation	$ 8,788
Year(s) Acquired	2011
Culver City [Member] | Commercial Real Estate [Member] | Culver City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	147
Initial Cost to Company, Land	$ 3,252
Initial Cost to Company, Buildings and Improvements	8,157
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	6,608
Gross Carrying Amount at December 31, 2021, Land	3,252
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	14,765
Gross Carrying Amount at December 31, 2021, Total	18,017
Accumulated Depreciation	$ 12,572
Year(s) Acquired	1997
Bayview Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	104
Initial Cost to Company, Land	$ 4,990
Initial Cost to Company, Buildings and Improvements	4,831
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	412
Gross Carrying Amount at December 31, 2021, Land	4,990
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	5,243
Gross Carrying Amount at December 31, 2021, Total	10,233
Accumulated Depreciation	$ 2,379
Year(s) Acquired	2011
Christy Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	334
Initial Cost to Company, Land	$ 11,451
Initial Cost to Company, Buildings and Improvements	16,254
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,714
Gross Carrying Amount at December 31, 2021, Land	11,451
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	17,968
Gross Carrying Amount at December 31, 2021, Total	29,419
Accumulated Depreciation	$ 7,927
Year(s) Acquired	2011
Industrial Drive Distribution Center [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	199
Initial Cost to Company, Land	$ 7,482
Initial Cost to Company, Buildings and Improvements	6,812
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,257
Gross Carrying Amount at December 31, 2021, Land	7,482
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	8,069
Gross Carrying Amount at December 31, 2021, Total	15,551
Accumulated Depreciation	$ 3,477
Year(s) Acquired	2011
Bay Center Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	463
Initial Cost to Company, Land	$ 19,052
Initial Cost to Company, Buildings and Improvements	50,501
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,631
Gross Carrying Amount at December 31, 2021, Land	19,052
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	54,132
Gross Carrying Amount at December 31, 2021, Total	73,184
Accumulated Depreciation	$ 21,477
Year(s) Acquired	2011
Cabot Distribution Center [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	249
Initial Cost to Company, Land	$ 5,859
Initial Cost to Company, Buildings and Improvements	10,811
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	532
Gross Carrying Amount at December 31, 2021, Land	5,859
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	11,343
Gross Carrying Amount at December 31, 2021, Total	17,202
Accumulated Depreciation	$ 4,144
Year(s) Acquired	2011
Diablo Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	271
Initial Cost to Company, Land	$ 9,102
Initial Cost to Company, Buildings and Improvements	15,721
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,189
Gross Carrying Amount at December 31, 2021, Land	9,102
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	16,910
Gross Carrying Amount at December 31, 2021, Total	26,012
Accumulated Depreciation	$ 6,778
Year(s) Acquired	2011
Eden Landing [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	83
Initial Cost to Company, Land	$ 3,275
Initial Cost to Company, Buildings and Improvements	6,174
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	212
Gross Carrying Amount at December 31, 2021, Land	3,275
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	6,386
Gross Carrying Amount at December 31, 2021, Total	9,661
Accumulated Depreciation	$ 2,558
Year(s) Acquired	2011
Hayward Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	1,091
Initial Cost to Company, Land	$ 28,256
Initial Cost to Company, Buildings and Improvements	54,418
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	8,582
Gross Carrying Amount at December 31, 2021, Land	28,256
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	63,000
Gross Carrying Amount at December 31, 2021, Total	91,256
Accumulated Depreciation	$ 23,024
Year(s) Acquired	2011
Huntwood Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	176
Initial Cost to Company, Land	$ 7,391
Initial Cost to Company, Buildings and Improvements	11,819
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,383
Gross Carrying Amount at December 31, 2021, Land	7,391
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	13,202
Gross Carrying Amount at December 31, 2021, Total	20,593
Accumulated Depreciation	$ 5,213
Year(s) Acquired	2011
Parkway Commerce [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	407
Initial Cost to Company, Land	$ 4,398
Initial Cost to Company, Buildings and Improvements	10,433
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,724
Gross Carrying Amount at December 31, 2021, Land	4,398
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	15,157
Gross Carrying Amount at December 31, 2021, Total	19,555
Accumulated Depreciation	$ 12,384
Year(s) Acquired	1997
La Mirada Commerce Center [Member] | Commercial Real Estate [Member] | La Mirada, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	73
Initial Cost to Company, Land	$ 11,122
Initial Cost to Company, Buildings and Improvements	2,153
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	513
Gross Carrying Amount at December 31, 2021, Land	11,122
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	2,666
Gross Carrying Amount at December 31, 2021, Total	13,788
Accumulated Depreciation	$ 364
Year(s) Acquired	2020
Laguna Hills Commerce Center [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	513
Initial Cost to Company, Land	$ 16,262
Initial Cost to Company, Buildings and Improvements	39,559
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	9,422
Gross Carrying Amount at December 31, 2021, Land	16,262
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	48,981
Gross Carrying Amount at December 31, 2021, Total	65,243
Accumulated Depreciation	$ 39,294
Year(s) Acquired	1997
Plaza Del Lago [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	101
Initial Cost to Company, Land	$ 2,037
Initial Cost to Company, Buildings and Improvements	5,051
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,232
Gross Carrying Amount at December 31, 2021, Land	2,037
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	9,283
Gross Carrying Amount at December 31, 2021, Total	11,320
Accumulated Depreciation	$ 7,755
Year(s) Acquired	1997
Canada Business Center [Member] | Commercial Real Estate [Member] | Lake Forest, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	297
Initial Cost to Company, Land	$ 5,508
Initial Cost to Company, Buildings and Improvements	13,785
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	6,961
Gross Carrying Amount at December 31, 2021, Land	5,508
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	20,746
Gross Carrying Amount at December 31, 2021, Total	26,254
Accumulated Depreciation	$ 16,826
Year(s) Acquired	1997
Dixon Landing Business Park [Member] | Commercial Real Estate [Member] | Milpitas, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	505
Initial Cost to Company, Land	$ 26,301
Initial Cost to Company, Buildings and Improvements	21,121
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,438
Gross Carrying Amount at December 31, 2021, Land	26,301
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	25,559
Gross Carrying Amount at December 31, 2021, Total	51,860
Accumulated Depreciation	$ 11,490
Year(s) Acquired	2011
Monterey/Calle [Member] | Commercial Real Estate [Member] | Monterey, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	12
Initial Cost to Company, Land	$ 288
Initial Cost to Company, Buildings and Improvements	706
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	382
Gross Carrying Amount at December 31, 2021, Land	288
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	1,088
Gross Carrying Amount at December 31, 2021, Total	1,376
Accumulated Depreciation	$ 927
Year(s) Acquired	1997
Monterey Park [Member] | Commercial Real Estate [Member] | Monterey Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	199
Initial Cost to Company, Land	$ 3,078
Initial Cost to Company, Buildings and Improvements	7,862
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,878
Gross Carrying Amount at December 31, 2021, Land	3,078
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	9,740
Gross Carrying Amount at December 31, 2021, Total	12,818
Accumulated Depreciation	$ 8,158
Year(s) Acquired	1997
Port Of Oakland [Member] | Commercial Real Estate [Member] | Oakland, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	200
Initial Cost to Company, Land	$ 5,638
Initial Cost to Company, Buildings and Improvements	11,066
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	914
Gross Carrying Amount at December 31, 2021, Land	5,638
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	11,980
Gross Carrying Amount at December 31, 2021, Total	17,618
Accumulated Depreciation	$ 4,901
Year(s) Acquired	2011
Kearney Mesa [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	164
Initial Cost to Company, Land	$ 2,894
Initial Cost to Company, Buildings and Improvements	7,089
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,983
Gross Carrying Amount at December 31, 2021, Land	2,894
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	11,072
Gross Carrying Amount at December 31, 2021, Total	13,966
Accumulated Depreciation	$ 8,642
Year(s) Acquired	1997
Rose Canyon Business Park [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	233
Initial Cost to Company, Land	$ 15,129
Initial Cost to Company, Buildings and Improvements	20,054
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,058
Gross Carrying Amount at December 31, 2021, Land	15,129
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	23,112
Gross Carrying Amount at December 31, 2021, Total	38,241
Accumulated Depreciation	$ 15,452
Year(s) Acquired	2005
Charcot Business Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	283
Initial Cost to Company, Land	$ 18,654
Initial Cost to Company, Buildings and Improvements	17,580
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	2,113
Gross Carrying Amount at December 31, 2021, Land	18,654
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	19,693
Gross Carrying Amount at December 31, 2021, Total	38,347
Accumulated Depreciation	$ 8,692
Year(s) Acquired	2011/2014
Las Plumas [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	214
Initial Cost to Company, Land	$ 4,379
Initial Cost to Company, Buildings and Improvements	12,889
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	6,900
Gross Carrying Amount at December 31, 2021, Land	4,379
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	19,789
Gross Carrying Amount at December 31, 2021, Total	24,168
Accumulated Depreciation	$ 17,082
Year(s) Acquired	1998
Little Orchard Distribution Center [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	213
Initial Cost to Company, Land	$ 7,725
Initial Cost to Company, Buildings and Improvements	3,846
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,851
Gross Carrying Amount at December 31, 2021, Land	7,725
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	5,697
Gross Carrying Amount at December 31, 2021, Total	13,422
Accumulated Depreciation	$ 2,135
Year(s) Acquired	2011
Montague Industrial Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	316
Initial Cost to Company, Land	$ 14,476
Initial Cost to Company, Buildings and Improvements	12,807
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	782
Gross Carrying Amount at December 31, 2021, Land	14,476
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	13,589
Gross Carrying Amount at December 31, 2021, Total	28,065
Accumulated Depreciation	$ 6,345
Year(s) Acquired	2011
Oakland Road [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	177
Initial Cost to Company, Land	$ 3,458
Initial Cost to Company, Buildings and Improvements	8,765
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,415
Gross Carrying Amount at December 31, 2021, Land	3,458
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	12,180
Gross Carrying Amount at December 31, 2021, Total	15,638
Accumulated Depreciation	$ 10,210
Year(s) Acquired	1997
Rogers Ave [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	67
Initial Cost to Company, Land	$ 3,540
Initial Cost to Company, Buildings and Improvements	4,896
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	564
Gross Carrying Amount at December 31, 2021, Land	3,540
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	5,460
Gross Carrying Amount at December 31, 2021, Total	9,000
Accumulated Depreciation	$ 3,379
Year(s) Acquired	2006
Doolittle Business Park [Member] | Commercial Real Estate [Member] | San Leandro, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	113
Initial Cost to Company, Land	$ 3,929
Initial Cost to Company, Buildings and Improvements	6,231
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	355
Gross Carrying Amount at December 31, 2021, Land	3,929
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	6,586
Gross Carrying Amount at December 31, 2021, Total	10,515
Accumulated Depreciation	$ 2,677
Year(s) Acquired	2011
Bayshore Corporate Center [Member] | Commercial Real Estate [Member] | San Mateo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	340
Initial Cost to Company, Land	$ 25,109
Initial Cost to Company, Buildings and Improvements	36,891
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	7,647
Gross Carrying Amount at December 31, 2021, Land	25,109
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	44,538
Gross Carrying Amount at December 31, 2021, Total	69,647
Accumulated Depreciation	$ 18,644
Year(s) Acquired	2013
San Ramon/Norris Canyon [Member] | Commercial Real Estate [Member] | San Ramon, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	52
Initial Cost to Company, Land	$ 1,486
Initial Cost to Company, Buildings and Improvements	3,642
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,385
Gross Carrying Amount at December 31, 2021, Land	1,486
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	5,027
Gross Carrying Amount at December 31, 2021, Total	6,513
Accumulated Depreciation	$ 4,154
Year(s) Acquired	1997
Commerce Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	251
Initial Cost to Company, Land	$ 17,218
Initial Cost to Company, Buildings and Improvements	21,914
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,012
Gross Carrying Amount at December 31, 2021, Land	17,218
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	25,926
Gross Carrying Amount at December 31, 2021, Total	43,144
Accumulated Depreciation	$ 18,298
Year(s) Acquired	2007
Santa Clara Tech Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	178
Initial Cost to Company, Land	$ 7,673
Initial Cost to Company, Buildings and Improvements	15,645
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,792
Gross Carrying Amount at December 31, 2021, Land	7,673
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	19,437
Gross Carrying Amount at December 31, 2021, Total	27,110
Accumulated Depreciation	$ 15,356
Year(s) Acquired	2000
San Tomas Business Center [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	79
Initial Cost to Company, Land	$ 12,932
Initial Cost to Company, Buildings and Improvements	3,549
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	931
Gross Carrying Amount at December 31, 2021, Land	12,932
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	4,480
Gross Carrying Amount at December 31, 2021, Total	17,412
Accumulated Depreciation	$ 707
Year(s) Acquired	2019
Walsh At Lafayette [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	321
Initial Cost to Company, Land	$ 13,439
Initial Cost to Company, Buildings and Improvements	17,890
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,223
Gross Carrying Amount at December 31, 2021, Land	13,439
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	19,113
Gross Carrying Amount at December 31, 2021, Total	32,552
Accumulated Depreciation	$ 8,535
Year(s) Acquired	2011
Hathaway Industrial Park [Member] | Commercial Real Estate [Member] | Santa Fe Springs, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	543
Initial Cost to Company, Land	$ 65,494
Initial Cost to Company, Buildings and Improvements	36,786
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	2,715
Gross Carrying Amount at December 31, 2021, Land	65,494
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	39,501
Gross Carrying Amount at December 31, 2021, Total	104,995
Accumulated Depreciation	$ 3,557
Year(s) Acquired	2019
Signal Hill [Member] | Commercial Real Estate [Member] | Signal Hill, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	343
Initial Cost to Company, Land	$ 16,360
Initial Cost to Company, Buildings and Improvements	16,678
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,851
Gross Carrying Amount at December 31, 2021, Land	16,360
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	20,529
Gross Carrying Amount at December 31, 2021, Total	36,889
Accumulated Depreciation	$ 12,634
Year(s) Acquired	1997/2006/2019
Airport Boulevard [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	52
Initial Cost to Company, Land	$ 899
Initial Cost to Company, Buildings and Improvements	2,387
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	809
Gross Carrying Amount at December 31, 2021, Land	899
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	3,196
Gross Carrying Amount at December 31, 2021, Total	4,095
Accumulated Depreciation	$ 2,702
Year(s) Acquired	1997
South San Francisco/Produce [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	41
Initial Cost to Company, Land	$ 776
Initial Cost to Company, Buildings and Improvements	1,886
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	514
Gross Carrying Amount at December 31, 2021, Land	776
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	2,400
Gross Carrying Amount at December 31, 2021, Total	3,176
Accumulated Depreciation	$ 1,987
Year(s) Acquired	1997
Studio City/Ventura [Member] | Commercial Real Estate [Member] | Studio City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	22
Initial Cost to Company, Land	$ 621
Initial Cost to Company, Buildings and Improvements	1,530
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	552
Gross Carrying Amount at December 31, 2021, Land	621
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	2,082
Gross Carrying Amount at December 31, 2021, Total	2,703
Accumulated Depreciation	$ 1,775
Year(s) Acquired	1997
Kifer Industrial Park [Member] | Commercial Real Estate [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	287
Initial Cost to Company, Land	$ 13,227
Initial Cost to Company, Buildings and Improvements	37,874
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,946
Gross Carrying Amount at December 31, 2021, Land	13,227
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	39,820
Gross Carrying Amount at December 31, 2021, Total	53,047
Accumulated Depreciation	$ 15,730
Year(s) Acquired	2011
Torrance [Member] | Commercial Real Estate [Member] | Torrance, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	147
Initial Cost to Company, Land	$ 2,318
Initial Cost to Company, Buildings and Improvements	6,069
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,833
Gross Carrying Amount at December 31, 2021, Land	2,318
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	9,902
Gross Carrying Amount at December 31, 2021, Total	12,220
Accumulated Depreciation	$ 8,206
Year(s) Acquired	1997
Boca Commerce [Member] | Commercial Real Estate [Member] | Boca Raton, FL [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	135
Initial Cost to Company, Land	$ 7,795
Initial Cost to Company, Buildings and Improvements	9,258
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,208
Gross Carrying Amount at December 31, 2021, Land	7,795
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	12,466
Gross Carrying Amount at December 31, 2021, Total	20,261
Accumulated Depreciation	$ 8,093
Year(s) Acquired	2006
MICC [Member] | Commercial Real Estate [Member] | Miami, FL [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	3,468
Initial Cost to Company, Land	$ 95,115
Initial Cost to Company, Buildings and Improvements	112,583
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	44,849
Gross Carrying Amount at December 31, 2021, Land	95,115
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	157,432
Gross Carrying Amount at December 31, 2021, Total	252,547
Accumulated Depreciation	$ 110,110
Year(s) Acquired	2003/2011/2014
Wellington [Member] | Commercial Real Estate [Member] | Wellington, FL [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	263
Initial Cost to Company, Land	$ 10,845
Initial Cost to Company, Buildings and Improvements	18,560
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	2,705
Gross Carrying Amount at December 31, 2021, Land	10,845
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	21,265
Gross Carrying Amount at December 31, 2021, Total	32,110
Accumulated Depreciation	$ 12,067
Year(s) Acquired	2006
Ammendale [Member] | Commercial Real Estate [Member] | Beltsville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	255
Initial Cost to Company, Land	$ 3,652
Initial Cost to Company, Buildings and Improvements	15,218
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	10,333
Gross Carrying Amount at December 31, 2021, Land	3,652
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	25,551
Gross Carrying Amount at December 31, 2021, Total	29,203
Accumulated Depreciation	$ 22,126
Year(s) Acquired	1998
Gaithersburgh/Christopher [Member] | Commercial Real Estate [Member] | Gaithersburg, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	29
Initial Cost to Company, Land	$ 475
Initial Cost to Company, Buildings and Improvements	1,203
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	905
Gross Carrying Amount at December 31, 2021, Land	475
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	2,108
Gross Carrying Amount at December 31, 2021, Total	2,583
Accumulated Depreciation	$ 1,733
Year(s) Acquired	1997
Gude Drive (Land) [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost to Company, Land	$ 1,142
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	328
Gross Carrying Amount at December 31, 2021, Land	1,142
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	328
Gross Carrying Amount at December 31, 2021, Total	1,470
Accumulated Depreciation	$ 243
Year(s) Acquired	2001
Parklawn Business Park [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	231
Initial Cost to Company, Land	$ 3,387
Initial Cost to Company, Buildings and Improvements	19,628
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	6,193
Gross Carrying Amount at December 31, 2021, Land	3,387
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	25,821
Gross Carrying Amount at December 31, 2021, Total	29,208
Accumulated Depreciation	$ 13,777
Year(s) Acquired	2010
The Grove 270 [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	577
Initial Cost to Company, Land	$ 11,009
Initial Cost to Company, Buildings and Improvements	58,364
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	23,703
Gross Carrying Amount at December 31, 2021, Land	11,009
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	82,067
Gross Carrying Amount at December 31, 2021, Total	93,076
Accumulated Depreciation	$ 41,184
Year(s) Acquired	2010/2016
Ben White [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	108
Initial Cost to Company, Land	$ 1,550
Initial Cost to Company, Buildings and Improvements	7,015
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,385
Gross Carrying Amount at December 31, 2021, Land	1,550
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	10,400
Gross Carrying Amount at December 31, 2021, Total	11,950
Accumulated Depreciation	$ 7,398
Year(s) Acquired	1998
Lamar Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	198
Initial Cost to Company, Land	$ 2,528
Initial Cost to Company, Buildings and Improvements	6,596
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	8,477
Gross Carrying Amount at December 31, 2021, Land	2,528
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	15,073
Gross Carrying Amount at December 31, 2021, Total	17,601
Accumulated Depreciation	$ 12,321
Year(s) Acquired	1997
McKalla [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	236
Initial Cost to Company, Land	$ 1,945
Initial Cost to Company, Buildings and Improvements	13,212
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	2,568
Gross Carrying Amount at December 31, 2021, Land	1,945
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	15,780
Gross Carrying Amount at December 31, 2021, Total	17,725
Accumulated Depreciation	$ 10,130
Year(s) Acquired	1998/2012
McNeil [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	525
Initial Cost to Company, Land	$ 5,477
Initial Cost to Company, Buildings and Improvements	24,495
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	5,992
Gross Carrying Amount at December 31, 2021, Land	5,477
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	30,487
Gross Carrying Amount at December 31, 2021, Total	35,964
Accumulated Depreciation	$ 16,293
Year(s) Acquired	1999/2010/2012/2014
Rutland [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	235
Initial Cost to Company, Land	$ 2,022
Initial Cost to Company, Buildings and Improvements	9,397
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,007
Gross Carrying Amount at December 31, 2021, Land	2,022
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	12,404
Gross Carrying Amount at December 31, 2021, Total	14,426
Accumulated Depreciation	$ 9,583
Year(s) Acquired	1998/1999
Waterford [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	106
Initial Cost to Company, Land	$ 2,108
Initial Cost to Company, Buildings and Improvements	9,649
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,007
Gross Carrying Amount at December 31, 2021, Land	2,108
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	13,656
Gross Carrying Amount at December 31, 2021, Total	15,764
Accumulated Depreciation	$ 11,391
Year(s) Acquired	1999
Braker Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	257
Initial Cost to Company, Land	$ 1,874
Initial Cost to Company, Buildings and Improvements	13,990
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,140
Gross Carrying Amount at December 31, 2021, Land	1,874
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	17,130
Gross Carrying Amount at December 31, 2021, Total	19,004
Accumulated Depreciation	$ 9,417
Year(s) Acquired	2010
Mopac Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	117
Initial Cost to Company, Land	$ 719
Initial Cost to Company, Buildings and Improvements	3,579
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	739
Gross Carrying Amount at December 31, 2021, Land	719
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	4,318
Gross Carrying Amount at December 31, 2021, Total	5,037
Accumulated Depreciation	$ 2,347
Year(s) Acquired	2010
Southpark Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	181
Initial Cost to Company, Land	$ 1,266
Initial Cost to Company, Buildings and Improvements	9,882
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	2,701
Gross Carrying Amount at December 31, 2021, Land	1,266
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	12,583
Gross Carrying Amount at December 31, 2021, Total	13,849
Accumulated Depreciation	$ 6,771
Year(s) Acquired	2010
Valwood Business Center [Member] | Commercial Real Estate [Member] | Carrolton, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	356
Initial Cost to Company, Land	$ 2,510
Initial Cost to Company, Buildings and Improvements	13,859
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,002
Gross Carrying Amount at December 31, 2021, Land	2,510
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	17,861
Gross Carrying Amount at December 31, 2021, Total	20,371
Accumulated Depreciation	$ 7,506
Year(s) Acquired	2013
Northway Plaza [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	131
Initial Cost to Company, Land	$ 1,742
Initial Cost to Company, Buildings and Improvements	4,503
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	2,629
Gross Carrying Amount at December 31, 2021, Land	1,742
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	7,132
Gross Carrying Amount at December 31, 2021, Total	8,874
Accumulated Depreciation	$ 2,763
Year(s) Acquired	2013
Springlake Business Center [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	206
Initial Cost to Company, Land	$ 2,607
Initial Cost to Company, Buildings and Improvements	5,715
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,698
Gross Carrying Amount at December 31, 2021, Land	2,607
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	7,413
Gross Carrying Amount at December 31, 2021, Total	10,020
Accumulated Depreciation	$ 3,516
Year(s) Acquired	2013/2014
Westwood Business Park [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	112
Initial Cost to Company, Land	$ 941
Initial Cost to Company, Buildings and Improvements	6,884
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	2,501
Gross Carrying Amount at December 31, 2021, Land	941
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	9,385
Gross Carrying Amount at December 31, 2021, Total	10,326
Accumulated Depreciation	$ 6,825
Year(s) Acquired	2003
Eastgate [Member] | Commercial Real Estate [Member] | Garland, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	36
Initial Cost to Company, Land	$ 480
Initial Cost to Company, Buildings and Improvements	1,203
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	552
Gross Carrying Amount at December 31, 2021, Land	480
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	1,755
Gross Carrying Amount at December 31, 2021, Total	2,235
Accumulated Depreciation	$ 1,443
Year(s) Acquired	1997
Port America [Member] | Commercial Real Estate [Member] | Grapevine, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	718
Initial Cost to Company, Land	$ 20,308
Initial Cost to Company, Buildings and Improvements	100,896
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	143
Gross Carrying Amount at December 31, 2021, Land	20,308
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	101,039
Gross Carrying Amount at December 31, 2021, Total	121,347
Accumulated Depreciation	$ 1,511
Year(s) Acquired	2021
Freeport Business Park [Member] | Commercial Real Estate [Member] | Irving, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	339
Initial Cost to Company, Land	$ 5,552
Initial Cost to Company, Buildings and Improvements	17,568
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,428
Gross Carrying Amount at December 31, 2021, Land	5,552
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	20,996
Gross Carrying Amount at December 31, 2021, Total	26,548
Accumulated Depreciation	$ 6,664
Year(s) Acquired	2013/2021
NFTZ [Member] | Commercial Real Estate [Member] | Irving, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	231
Initial Cost to Company, Land	$ 1,517
Initial Cost to Company, Buildings and Improvements	6,499
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,024
Gross Carrying Amount at December 31, 2021, Land	1,517
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	10,523
Gross Carrying Amount at December 31, 2021, Total	12,040
Accumulated Depreciation	$ 8,919
Year(s) Acquired	1998
Number of properties subject to ground leases | property	2
La Prada [Member] | Commercial Real Estate [Member] | Mesquite, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	56
Initial Cost to Company, Land	$ 495
Initial Cost to Company, Buildings and Improvements	1,235
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	823
Gross Carrying Amount at December 31, 2021, Land	495
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	2,058
Gross Carrying Amount at December 31, 2021, Total	2,553
Accumulated Depreciation	$ 1,728
Year(s) Acquired	1997
The Summit [Member] | Commercial Real Estate [Member] | Plano, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	184
Initial Cost to Company, Land	$ 1,536
Initial Cost to Company, Buildings and Improvements	6,654
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,420
Gross Carrying Amount at December 31, 2021, Land	1,536
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	11,074
Gross Carrying Amount at December 31, 2021, Total	12,610
Accumulated Depreciation	$ 9,252
Year(s) Acquired	1998
Jupiter Business Park [Member] | Commercial Real Estate [Member] | Plano, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	141
Initial Cost to Company, Land	$ 2,283
Initial Cost to Company, Buildings and Improvements	22,817
Gross Carrying Amount at December 31, 2021, Land	2,283
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	22,817
Gross Carrying Amount at December 31, 2021, Total	25,100
Accumulated Depreciation	$ 86
Year(s) Acquired	2021
Arapaho Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	408
Initial Cost to Company, Land	$ 5,226
Initial Cost to Company, Buildings and Improvements	10,661
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,989
Gross Carrying Amount at December 31, 2021, Land	5,226
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	15,650
Gross Carrying Amount at December 31, 2021, Total	20,876
Accumulated Depreciation	$ 8,068
Year(s) Acquired	2013/2014
Richardson Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	117
Initial Cost to Company, Land	$ 799
Initial Cost to Company, Buildings and Improvements	3,568
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,232
Gross Carrying Amount at December 31, 2021, Land	799
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	6,800
Gross Carrying Amount at December 31, 2021, Total	7,599
Accumulated Depreciation	$ 5,872
Year(s) Acquired	1998
Bren Mar [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	113
Initial Cost to Company, Land	$ 2,197
Initial Cost to Company, Buildings and Improvements	5,380
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	4,523
Gross Carrying Amount at December 31, 2021, Land	2,197
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	9,903
Gross Carrying Amount at December 31, 2021, Total	12,100
Accumulated Depreciation	$ 8,151
Year(s) Acquired	1997
Eisenhower [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	95
Initial Cost to Company, Land	$ 1,440
Initial Cost to Company, Buildings and Improvements	3,635
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	2,947
Gross Carrying Amount at December 31, 2021, Land	1,440
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	6,582
Gross Carrying Amount at December 31, 2021, Total	8,022
Accumulated Depreciation	$ 5,567
Year(s) Acquired	1997
Pickett Industrial Park [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	246
Initial Cost to Company, Land	$ 19,138
Initial Cost to Company, Buildings and Improvements	25,016
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,429
Gross Carrying Amount at December 31, 2021, Land	19,138
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	26,445
Gross Carrying Amount at December 31, 2021, Total	45,583
Accumulated Depreciation	$ 1,336
Year(s) Acquired	2020
Beaumont [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	107
Initial Cost to Company, Land	$ 4,736
Initial Cost to Company, Buildings and Improvements	11,051
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	2,294
Gross Carrying Amount at December 31, 2021, Land	4,736
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	13,345
Gross Carrying Amount at December 31, 2021, Total	18,081
Accumulated Depreciation	$ 9,110
Year(s) Acquired	2006
Dulles South [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	99
Initial Cost to Company, Land	$ 1,373
Initial Cost to Company, Buildings and Improvements	6,810
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	3,172
Gross Carrying Amount at December 31, 2021, Land	1,373
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	9,982
Gross Carrying Amount at December 31, 2021, Total	11,355
Accumulated Depreciation	$ 7,932
Year(s) Acquired	1999
Lafayette [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	197
Initial Cost to Company, Land	$ 1,680
Initial Cost to Company, Buildings and Improvements	13,398
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	6,794
Gross Carrying Amount at December 31, 2021, Land	1,680
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	20,192
Gross Carrying Amount at December 31, 2021, Total	21,872
Accumulated Depreciation	$ 15,849
Year(s) Acquired	1999/2000
Fair Oaks Business Park [Member] | Commercial Real Estate [Member] | Fairfax, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	290
Initial Cost to Company, Land	$ 13,598
Initial Cost to Company, Buildings and Improvements	36,232
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	10,498
Gross Carrying Amount at December 31, 2021, Land	13,598
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	46,730
Gross Carrying Amount at December 31, 2021, Total	60,328
Accumulated Depreciation	$ 31,981
Year(s) Acquired	2004/2007
Gunston [Member] | Commercial Real Estate [Member] | Lorton, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	247
Initial Cost to Company, Land	$ 4,146
Initial Cost to Company, Buildings and Improvements	17,872
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	13,136
Gross Carrying Amount at December 31, 2021, Land	4,146
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	31,008
Gross Carrying Amount at December 31, 2021, Total	35,154
Accumulated Depreciation	$ 24,173
Year(s) Acquired	1998
The Mile [Member] | Commercial Real Estate [Member] | McLean, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	628
Initial Cost to Company, Land	$ 38,279
Initial Cost to Company, Buildings and Improvements	83,596
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	27,497
Gross Carrying Amount at December 31, 2021, Land	38,279
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	111,093
Gross Carrying Amount at December 31, 2021, Total	149,372
Accumulated Depreciation	$ 58,282
Year(s) Acquired	2010/2011
Prosperity at Merrifield [Member] | Commercial Real Estate [Member] | Merrifield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	659
Initial Cost to Company, Land	$ 23,147
Initial Cost to Company, Buildings and Improvements	67,575
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	40,476
Gross Carrying Amount at December 31, 2021, Land	23,147
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	108,051
Gross Carrying Amount at December 31, 2021, Total	131,198
Accumulated Depreciation	$ 79,924
Year(s) Acquired	2001
Alban Road [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	150
Initial Cost to Company, Land	$ 1,935
Initial Cost to Company, Buildings and Improvements	4,736
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	5,261
Gross Carrying Amount at December 31, 2021, Land	1,935
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	9,997
Gross Carrying Amount at December 31, 2021, Total	11,932
Accumulated Depreciation	$ 8,385
Year(s) Acquired	1997
I-95 [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	210
Initial Cost to Company, Land	$ 3,535
Initial Cost to Company, Buildings and Improvements	15,672
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	15,128
Gross Carrying Amount at December 31, 2021, Land	3,535
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	30,800
Gross Carrying Amount at December 31, 2021, Total	34,335
Accumulated Depreciation	$ 25,926
Year(s) Acquired	2000
Fullterton Road Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	243
Initial Cost to Company, Land	$ 7,438
Initial Cost to Company, Buildings and Improvements	24,971
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	1,241
Gross Carrying Amount at December 31, 2021, Land	7,438
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	26,212
Gross Carrying Amount at December 31, 2021, Total	33,650
Accumulated Depreciation	$ 3,990
Year(s) Acquired	2018
Northern Virginia Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	814
Initial Cost to Company, Land	$ 18,369
Initial Cost to Company, Buildings and Improvements	87,258
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	7,575
Gross Carrying Amount at December 31, 2021, Land	18,369
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	94,833
Gross Carrying Amount at December 31, 2021, Total	113,202
Accumulated Depreciation	$ 14,750
Year(s) Acquired	2018
Northpointe [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	147
Initial Cost to Company, Land	$ 2,767
Initial Cost to Company, Buildings and Improvements	8,778
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	5,182
Gross Carrying Amount at December 31, 2021, Land	2,767
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	13,960
Gross Carrying Amount at December 31, 2021, Total	16,727
Accumulated Depreciation	$ 11,920
Year(s) Acquired	1997/1998
Shaw Road [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	149
Initial Cost to Company, Land	$ 2,969
Initial Cost to Company, Buildings and Improvements	10,008
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	5,094
Gross Carrying Amount at December 31, 2021, Land	2,969
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	15,102
Gross Carrying Amount at December 31, 2021, Total	18,071
Accumulated Depreciation	$ 12,864
Year(s) Acquired	1998
Tysons Corporate Center [Member] | Commercial Real Estate [Member] | Vienna, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	270
Initial Cost to Company, Land	$ 9,885
Initial Cost to Company, Buildings and Improvements	25,302
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	11,028
Gross Carrying Amount at December 31, 2021, Land	9,885
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	36,330
Gross Carrying Amount at December 31, 2021, Total	46,215
Accumulated Depreciation	$ 19,502
Year(s) Acquired	2010
Woodbridge [Member] | Commercial Real Estate [Member] | Woodbridge, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	114
Initial Cost to Company, Land	$ 1,350
Initial Cost to Company, Buildings and Improvements	3,398
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	2,484
Gross Carrying Amount at December 31, 2021, Land	1,350
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	5,882
Gross Carrying Amount at December 31, 2021, Total	7,232
Accumulated Depreciation	$ 4,947
Year(s) Acquired	1997
212th Business Park [Member] | Commercial Real Estate [Member] | Kent, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	951
Initial Cost to Company, Land	$ 19,573
Initial Cost to Company, Buildings and Improvements	17,695
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	13,478
Gross Carrying Amount at December 31, 2021, Land	19,573
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	31,173
Gross Carrying Amount at December 31, 2021, Total	50,746
Accumulated Depreciation	$ 15,437
Year(s) Acquired	2012
Overlake [Member] | Commercial Real Estate [Member] | Redmond, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	371
Initial Cost to Company, Land	$ 20,906
Initial Cost to Company, Buildings and Improvements	38,522
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	8,045
Gross Carrying Amount at December 31, 2021, Land	20,906
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	46,567
Gross Carrying Amount at December 31, 2021, Total	67,473
Accumulated Depreciation	$ 32,500
Year(s) Acquired	2007
Renton [Member] | Commercial Real Estate [Member] | Renton, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	28
Initial Cost to Company, Land	$ 330
Initial Cost to Company, Buildings and Improvements	889
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	760
Gross Carrying Amount at December 31, 2021, Land	330
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	1,649
Gross Carrying Amount at December 31, 2021, Total	1,979
Accumulated Depreciation	$ 1,393
Year(s) Acquired	1997
Highgate at the Mile [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of units of Real Estate Property | property	395
Highgate at the Mile [Member] | Multifamily [Member] | McLean, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of units of Real Estate Property | property	395
Initial Cost to Company, Land	$ 21,814
Initial Cost to Company, Buildings and Improvements	84,923
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	49
Gross Carrying Amount at December 31, 2021, Land	21,814
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	84,972
Gross Carrying Amount at December 31, 2021, Total	106,786
Accumulated Depreciation	$ 10,573
Year(s) Acquired	2018
Royal Tech [Member] | Properties Held for Sale [Member] | Irving, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Square Feet | ft²	702
Initial Cost to Company, Land	$ 12,683
Initial Cost to Company, Buildings and Improvements	48,521
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements	26,214
Gross Carrying Amount at December 31, 2021, Land	12,683
Gross Carrying Amount at December 31, 2021, Buildings and Improvements	74,735
Gross Carrying Amount at December 31, 2021, Total	87,418
Accumulated Depreciation	$ 56,285
Year(s) Acquired	1998-2000/2011
Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ground leases expiration date	2029
Minimum [Member] | Buena Park Industrial Center [Member] | Commercial Real Estate [Member] | Buena Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Carson [Member] | Commercial Real Estate [Member] | Carson, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Cerritos Business Center [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Cerritos/Edwards [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Concord Business Park [Member] | Commercial Real Estate [Member] | Concord, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Culver City [Member] | Commercial Real Estate [Member] | Culver City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Bayview Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Christy Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Industrial Drive Distribution Center [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Bay Center Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Cabot Distribution Center [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Diablo Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Eden Landing [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Hayward Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Huntwood Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Parkway Commerce [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | La Mirada Commerce Center [Member] | Commercial Real Estate [Member] | La Mirada, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Laguna Hills Commerce Center [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Plaza Del Lago [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Canada Business Center [Member] | Commercial Real Estate [Member] | Lake Forest, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Dixon Landing Business Park [Member] | Commercial Real Estate [Member] | Milpitas, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Monterey/Calle [Member] | Commercial Real Estate [Member] | Monterey, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Monterey Park [Member] | Commercial Real Estate [Member] | Monterey Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Port Of Oakland [Member] | Commercial Real Estate [Member] | Oakland, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Kearney Mesa [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Rose Canyon Business Park [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Charcot Business Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Las Plumas [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Little Orchard Distribution Center [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Montague Industrial Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Oakland Road [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Rogers Ave [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Doolittle Business Park [Member] | Commercial Real Estate [Member] | San Leandro, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Bayshore Corporate Center [Member] | Commercial Real Estate [Member] | San Mateo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | San Ramon/Norris Canyon [Member] | Commercial Real Estate [Member] | San Ramon, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Commerce Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Santa Clara Tech Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | San Tomas Business Center [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Walsh At Lafayette [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Hathaway Industrial Park [Member] | Commercial Real Estate [Member] | Santa Fe Springs, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Signal Hill [Member] | Commercial Real Estate [Member] | Signal Hill, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Airport Boulevard [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | South San Francisco/Produce [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Studio City/Ventura [Member] | Commercial Real Estate [Member] | Studio City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Kifer Industrial Park [Member] | Commercial Real Estate [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Torrance [Member] | Commercial Real Estate [Member] | Torrance, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Boca Commerce [Member] | Commercial Real Estate [Member] | Boca Raton, FL [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | MICC [Member] | Commercial Real Estate [Member] | Miami, FL [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Wellington [Member] | Commercial Real Estate [Member] | Wellington, FL [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Ammendale [Member] | Commercial Real Estate [Member] | Beltsville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Gaithersburgh/Christopher [Member] | Commercial Real Estate [Member] | Gaithersburg, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Gude Drive (Land) [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Parklawn Business Park [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | The Grove 270 [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Ben White [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Lamar Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | McKalla [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | McNeil [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Rutland [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Waterford [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Braker Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Mopac Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Southpark Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Valwood Business Center [Member] | Commercial Real Estate [Member] | Carrolton, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Northway Plaza [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Springlake Business Center [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Westwood Business Park [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Eastgate [Member] | Commercial Real Estate [Member] | Garland, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Port America [Member] | Commercial Real Estate [Member] | Grapevine, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Freeport Business Park [Member] | Commercial Real Estate [Member] | Irving, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | NFTZ [Member] | Commercial Real Estate [Member] | Irving, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Ground leases expiration date	2029
Minimum [Member] | La Prada [Member] | Commercial Real Estate [Member] | Mesquite, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | The Summit [Member] | Commercial Real Estate [Member] | Plano, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Jupiter Business Park [Member] | Commercial Real Estate [Member] | Plano, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Arapaho Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Richardson Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Bren Mar [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Eisenhower [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Pickett Industrial Park [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Beaumont [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Dulles South [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Lafayette [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Fair Oaks Business Park [Member] | Commercial Real Estate [Member] | Fairfax, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Gunston [Member] | Commercial Real Estate [Member] | Lorton, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | The Mile [Member] | Commercial Real Estate [Member] | McLean, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Prosperity at Merrifield [Member] | Commercial Real Estate [Member] | Merrifield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Alban Road [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | I-95 [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Fullterton Road Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Northern Virginia Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Northpointe [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Shaw Road [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Tysons Corporate Center [Member] | Commercial Real Estate [Member] | Vienna, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Woodbridge [Member] | Commercial Real Estate [Member] | Woodbridge, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | 212th Business Park [Member] | Commercial Real Estate [Member] | Kent, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Overlake [Member] | Commercial Real Estate [Member] | Redmond, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Renton [Member] | Commercial Real Estate [Member] | Renton, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Highgate at the Mile [Member] | Multifamily [Member] | McLean, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Minimum [Member] | Royal Tech [Member] | Properties Held for Sale [Member] | Irving, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	5 years
Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ground leases expiration date	2030
Maximum [Member] | Buena Park Industrial Center [Member] | Commercial Real Estate [Member] | Buena Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Carson [Member] | Commercial Real Estate [Member] | Carson, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Cerritos Business Center [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Cerritos/Edwards [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Concord Business Park [Member] | Commercial Real Estate [Member] | Concord, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Culver City [Member] | Commercial Real Estate [Member] | Culver City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Bayview Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Christy Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Industrial Drive Distribution Center [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Bay Center Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Cabot Distribution Center [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Diablo Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Eden Landing [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Hayward Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Huntwood Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Parkway Commerce [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | La Mirada Commerce Center [Member] | Commercial Real Estate [Member] | La Mirada, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Laguna Hills Commerce Center [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Plaza Del Lago [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Canada Business Center [Member] | Commercial Real Estate [Member] | Lake Forest, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Dixon Landing Business Park [Member] | Commercial Real Estate [Member] | Milpitas, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Monterey/Calle [Member] | Commercial Real Estate [Member] | Monterey, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Monterey Park [Member] | Commercial Real Estate [Member] | Monterey Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Port Of Oakland [Member] | Commercial Real Estate [Member] | Oakland, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Kearney Mesa [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Rose Canyon Business Park [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Charcot Business Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Las Plumas [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Little Orchard Distribution Center [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Montague Industrial Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Oakland Road [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Rogers Ave [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Doolittle Business Park [Member] | Commercial Real Estate [Member] | San Leandro, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Bayshore Corporate Center [Member] | Commercial Real Estate [Member] | San Mateo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | San Ramon/Norris Canyon [Member] | Commercial Real Estate [Member] | San Ramon, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Commerce Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Santa Clara Tech Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | San Tomas Business Center [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Walsh At Lafayette [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Hathaway Industrial Park [Member] | Commercial Real Estate [Member] | Santa Fe Springs, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Signal Hill [Member] | Commercial Real Estate [Member] | Signal Hill, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Airport Boulevard [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | South San Francisco/Produce [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Studio City/Ventura [Member] | Commercial Real Estate [Member] | Studio City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Kifer Industrial Park [Member] | Commercial Real Estate [Member] | Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Torrance [Member] | Commercial Real Estate [Member] | Torrance, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Boca Commerce [Member] | Commercial Real Estate [Member] | Boca Raton, FL [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | MICC [Member] | Commercial Real Estate [Member] | Miami, FL [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Wellington [Member] | Commercial Real Estate [Member] | Wellington, FL [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Ammendale [Member] | Commercial Real Estate [Member] | Beltsville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Gaithersburgh/Christopher [Member] | Commercial Real Estate [Member] | Gaithersburg, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Gude Drive (Land) [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Parklawn Business Park [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | The Grove 270 [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Ben White [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Lamar Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | McKalla [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | McNeil [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Rutland [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Waterford [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Braker Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Mopac Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Southpark Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Valwood Business Center [Member] | Commercial Real Estate [Member] | Carrolton, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Northway Plaza [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Springlake Business Center [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Westwood Business Park [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Eastgate [Member] | Commercial Real Estate [Member] | Garland, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Port America [Member] | Commercial Real Estate [Member] | Grapevine, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Freeport Business Park [Member] | Commercial Real Estate [Member] | Irving, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | NFTZ [Member] | Commercial Real Estate [Member] | Irving, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Ground leases expiration date	2030
Maximum [Member] | La Prada [Member] | Commercial Real Estate [Member] | Mesquite, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | The Summit [Member] | Commercial Real Estate [Member] | Plano, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Jupiter Business Park [Member] | Commercial Real Estate [Member] | Plano, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Arapaho Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Richardson Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Bren Mar [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Eisenhower [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Pickett Industrial Park [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Beaumont [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Dulles South [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Lafayette [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Fair Oaks Business Park [Member] | Commercial Real Estate [Member] | Fairfax, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Gunston [Member] | Commercial Real Estate [Member] | Lorton, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | The Mile [Member] | Commercial Real Estate [Member] | McLean, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Prosperity at Merrifield [Member] | Commercial Real Estate [Member] | Merrifield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Alban Road [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | I-95 [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Fullterton Road Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Northern Virginia Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Northpointe [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Shaw Road [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Tysons Corporate Center [Member] | Commercial Real Estate [Member] | Vienna, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Woodbridge [Member] | Commercial Real Estate [Member] | Woodbridge, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | 212th Business Park [Member] | Commercial Real Estate [Member] | Kent, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Overlake [Member] | Commercial Real Estate [Member] | Redmond, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Renton [Member] | Commercial Real Estate [Member] | Renton, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years
Maximum [Member] | Highgate at the Mile [Member] | Multifamily [Member] | McLean, VA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	40 years
Maximum [Member] | Royal Tech [Member] | Properties Held for Sale [Member] | Irving, TX [Member]
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives (Years)	30 years