Douglas Emmett (DEI) 10-K 22 Feb 21 2020 FY Annual report Financial data

Cover

Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Feb. 12, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	1-33106
Entity Registrant Name	Douglas Emmett, Inc.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	20-3073047
Entity Address, Address Line One	1299 Ocean Avenue, Suite 1000
Entity Address, City or Town	Santa Monica
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90401
City Area Code	310
Local Phone Number	255-7700
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	DEI
Security Exchange Name	NYSE
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			$ 5,090
Common Shares Outstanding		175,464,148
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement to be filed in conjunction with the registrant’s annual meeting of shareholders to be held in 2021 are incorporated by reference in Part III of this Report on Form 10-K. Such proxy statement will be filed by the registrant with the Securities and Exchange Commission not later than 120 days after the end of the registrant’s fiscal year ended December 31, 2020.
Entity Central Index Key	0001364250
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Investment in real estate, gross	$ 11,678,638	$ 11,478,633
Less: accumulated depreciation and amortization	(2,816,193)	(2,518,415)
Investment in real estate, net	8,862,445	8,960,218
Ground lease right-of-use asset	7,472	7,479
Cash and cash equivalents	172,385	153,683
Tenant receivables	18,226	5,302
Deferred rent receivables	116,199	134,968
Acquired lease intangible assets, net	5,141	6,407
Interest rate contract assets	0	22,381
Investment in unconsolidated Fund	47,374	42,442
Other assets	21,583	16,421
Total Assets	9,250,825	9,349,301
Liabilities
Secured notes payable and revolving credit facility, net	4,744,967	4,619,058
Ground lease liability	10,871	10,882
Interest payable, accounts payable and deferred revenue	144,344	131,410
Security deposits	56,247	60,923
Acquired lease intangible liabilities, net	35,223	52,367
Interest rate contract liabilities	214,016	54,616
Dividends payable	49,138	49,111
Total liabilities	5,254,806	4,978,367
Douglas Emmett, Inc. stockholders' equity:
Common Stock, $0.01 par value, 750,000,000 authorized, 175,463,887 and 175,369,746 outstanding at December 31, 2020 and December 31, 2019, respectively	1,755	1,754
Additional paid-in capital	3,487,887	3,486,356
Accumulated other comprehensive loss	(148,035)	(17,462)
Accumulated deficit	(904,516)	(758,576)
Total Douglas Emmett, Inc. stockholders' equity	2,437,091	2,712,072
Noncontrolling interests	1,558,928	1,658,862
Total equity	3,996,019	4,370,934
Total Liabilities and Equity	$ 9,250,825	$ 9,349,301

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common Stock, par value (usd per share)	$ 0.01	$ 0.01
Common Stock, authorized (in shares)	750,000,000	750,000,000
Common Stock, outstanding (in shares)	175,463,887	175,369,746

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues
Revenues	$ 891,523	$ 936,682	$ 881,316
Operating Expenses
General and administrative expenses	39,601	38,068	38,641
Depreciation and amortization	385,248	357,743	309,864
Total operating expenses	730,262	693,974	629,372
Other income	16,288	11,653	11,414
Other expenses	(2,947)	(7,216)	(7,744)
Income from unconsolidated Funds	430	6,923	6,400
Interest expense	(142,872)	(143,308)	(133,402)
Gain on sale of investment in real estate	6,393	0	0
Gain from consolidation of JV	0	307,938	0
Net income	38,553	418,698	128,612
Less: Net loss (income) attributable to noncontrolling interests	11,868	(54,985)	(12,526)
Net income attributable to common stockholders	$ 50,421	$ 363,713	$ 116,086
Net income per common share – basic and diluted (usd per share)	$ 0.28	$ 2.09	$ 0.68
Office rental
Revenues
Revenues	$ 771,169	$ 816,755	$ 777,931
Operating Expenses
Operating expenses	268,259	264,482	252,751
Office rental | Rental revenues and tenant recoveries
Revenues
Revenues	680,359	694,315	661,147
Office rental | Parking and other income
Revenues
Revenues	90,810	122,440	116,784
Multifamily rental
Revenues
Revenues	120,354	119,927	103,385
Operating Expenses
Operating expenses	37,154	33,681	28,116
Multifamily rental | Parking and other income
Revenues
Revenues	13,343	9,230	7,962
Multifamily rental | Rental revenues
Revenues
Revenues	$ 107,011	$ 110,697	$ 95,423

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 38,553	$ 418,698	$ 128,612
Other comprehensive (loss) income: cash flow hedges	(183,521)	(107,292)	15,070
Comprehensive (loss) income	(144,968)	311,406	143,682
Less: Comprehensive loss (income) attributable to noncontrolling interests	64,816	(19,099)	(16,751)
Comprehensive (loss) income attributable to common stockholders	$ (80,152)	$ 292,307	$ 126,931

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	AOCI	AOCICumulative Effect, Period of Adoption, Adjustment	Accumulated Deficit	Accumulated DeficitCumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interests	Noncontrolling InterestsCumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 31, 2017			169,565,000
Stockholders' Equity [Roll Forward]
Exchange of OP units for common stock (in shares)	629,000		629,000
Exercise of stock options (in shares)	49,000		21,000
Ending balance (in shares) at Dec. 31, 2018			170,215,000
Beginning balance at Dec. 31, 2017	$ 3,902,049	$ 211	$ 1,696	$ 3,272,539	$ 43,099		$ (879,810)		$ 1,464,525
Beginning balance (ASU 2017-12) at Dec. 31, 2017						$ 211		$ (211)
Stockholders' Equity [Roll Forward]
Exchange of OP Units for common stock			6	10,286					(10,292)
Repurchase of OP Units with cash	(108)			(59)					(49)
Taxes paid on exercise of stock options	(450)			(450)
Cash flow hedge adjustments	15,070				10,634				4,225
Cash flow hedge adjustments | ASU 2017-12	14,859
Net income	128,612						116,086		12,526
Dividends	(171,695)						(171,695)
Distributions	(52,142)								(52,142)
Issuance of OP Units for acquisition of additional interest in unconsolidated Fund	0
Stock-based compensation	27,305								27,305
Ending balance at Dec. 31, 2018	$ 3,848,430	0	$ 1,702	3,282,316	53,944		(935,630)		1,446,098
Ending balance (ASU 2016-02) at Dec. 31, 2018		(2,499)						$ (2,144)		$ (355)
Stockholders' Equity [Roll Forward]
Dividends declared per common share (in dollars per share)	$ 1.01
Exchange of OP units for common stock (in shares)	222,000		222,000
Issuance of common stock (in shares)	4,900,000		4,933,000
Ending balance (in shares) at Dec. 31, 2019	175,369,746		175,370,000
Stockholders' Equity [Roll Forward]
Exchange of OP Units for common stock			$ 2	3,538					(3,540)
Issuance of common stock, net	$ 200,983		50	200,933
Repurchase of OP Units with cash	(734)			(431)					(303)
Cash flow hedge adjustments	(107,292)				(71,406)				(35,886)
Net income	418,698						363,713		54,985
Dividends	(184,515)						(184,515)
Contributions	176,000								176,000
Consolidation of JV	61,394								61,394
Distributions	(76,978)								(76,978)
Issuance of OP Units for acquisition of additional interest in unconsolidated Fund	14,390								14,390
Stock-based compensation	23,057								23,057
Ending balance at Dec. 31, 2019	$ 4,370,934	$ 0	$ 1,754	3,486,356	$ (17,462)		$ (758,576)		$ 1,658,862
Stockholders' Equity [Roll Forward]
Dividends declared per common share (in dollars per share)	$ 1.06
Accounting standards update [Extensible List] | ASU 2017-12					us-gaap:AccountingStandardsUpdate201712Member		us-gaap:AccountingStandardsUpdate201712Member
Accounting standards update [Extensible List] | ASU 2016-02	us-gaap:AccountingStandardsUpdate201602Member						us-gaap:AccountingStandardsUpdate201602Member		us-gaap:AccountingStandardsUpdate201602Member
Exchange of OP units for common stock (in shares)	94,000		94,000
Ending balance (in shares) at Dec. 31, 2020	175,463,887		175,464,000
Stockholders' Equity [Roll Forward]
Exchange of OP Units for common stock			$ 1	1,535					$ (1,536)
Repurchase of OP Units with cash	$ (7)			(4)					(3)
Cash flow hedge adjustments	(183,521)				$ (130,573)				(52,948)
Net income	38,553						$ 50,421		(11,868)
Dividends	(196,361)						(196,361)
Distributions	(60,392)								(60,392)
Issuance of OP Units for acquisition of additional interest in unconsolidated Fund	0
Stock-based compensation	26,813								26,813
Ending balance at Dec. 31, 2020	$ 3,996,019		$ 1,755	$ 3,487,887	$ (148,035)		$ (904,516)		$ 1,558,928
Stockholders' Equity [Roll Forward]
Dividends declared per common share (in dollars per share)	$ 1.12

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Activities
Net income	$ 38,553	$ 418,698	$ 128,612
Adjustments to reconcile net income to net cash provided by operating activities:
Income from unconsolidated Funds	(430)	(6,923)	(6,400)
Gain from insurance recoveries for damage to real estate	(13,105)	0	0
Gain on sale of investment in real estate	(6,393)	0	0
Gain from consolidation of JV	0	(307,938)	0
Depreciation and amortization	385,248	357,743	309,864
Net accretion of acquired lease intangibles	(15,878)	(16,264)	(22,025)
Straight-line rent	18,733	(10,134)	(18,813)
Loan premium amortized and written off	(2,274)	(261)	(205)
Deferred loan costs amortized and written off	7,832	14,314	8,292
Amortization of stock-based compensation	21,365	18,359	22,299
Operating distributions from unconsolidated Funds	394	6,820	6,400
Change in working capital components:
Tenant receivables	(11,645)	(609)	(1,391)
Interest payable, accounts payable and deferred revenue	5,557	(6,844)	1,376
Security deposits	(4,676)	1,919	319
Other assets	(3,063)	706	4,654
Net cash provided by operating activities	420,218	469,586	432,982
Investing Activities
Capital expenditures for improvements to real estate	(143,445)	(176,448)	(179,062)
Capital expenditures for developments	(154,153)	(61,660)	(68,459)
Insurance recoveries for damage to real estate	17,120	0	0
Property acquisition	0	(365,885)	0
Cash assumed from consolidation of JV	0	39,226	0
Proceeds from sale of investment in real estate, net	20,658	0	0
Acquisition of additional interests in unconsolidated Funds	(6,591)	(90,754)	(9,379)
Capital distributions from unconsolidated Funds	1,236	5,853	7,349
Net cash used in investing activities	(265,175)	(649,668)	(249,551)
Financing Activities
Proceeds from borrowings	674,000	2,185,000	667,000
Repayment of borrowings	(549,752)	(2,095,718)	(655,326)
Loan cost payments	(3,846)	(21,348)	(2,992)
Contributions from noncontrolling interests in consolidated JVs	0	163,556	0
Distributions paid to noncontrolling interests	(60,392)	(64,534)	(52,142)
Dividends paid to common stockholders	(196,333)	(179,667)	(169,831)
Taxes paid on exercise of stock options	0	0	(450)
Repurchase of OP Units	(7)	(734)	(108)
Proceeds from issuance of common stock, net	0	200,983	0
Net cash (used in) provided by financing activities	(136,330)	187,538	(213,849)
Increase (decrease) in cash and cash equivalents and restricted cash	18,713	7,456	(30,418)
Cash and cash equivalents and restricted cash - beginning balance	153,804	146,348	176,766
Cash and cash equivalents and restricted cash - ending balance	172,517	153,804	146,348
Cash and cash equivalents	172,385	153,683	146,227
Restricted cash	132	121	121
Operating Activities
Cash paid for interest, net of capitalized interest	136,823	128,205	124,487
Capitalized interest paid	4,810	3,782	3,520
Non-cash Investing Transactions
Accrual for real estate and development capital expenditures	37,185	35,398	24,702
Capitalized stock-based compensation for improvements to real estate and developments	5,448	4,698	5,006
Removal of fully depreciated and amortized tenant improvements and lease intangibles	73,045	88,205	75,729
Removal of fully amortized acquired lease intangible assets	372	2,132	1,582
Removal of fully accreted acquired lease intangible liabilities	20,649	29,660	15,431
Recognition of ground lease right-of-use asset - Adoption of ASU 2016-02	0	10,885	0
Above-market ground lease intangible liability offset against right-of-use asset - Adoption of ASU 2016-02	0	3,408	0
Recognition of ground lease liability - Adoption of ASU 2016-02	0	10,885	0
Non-cash Financing Transactions
Gain recorded in AOCI - Adoption of ASU 2017-12 - consolidated derivatives	0	0	211
(Loss) gain recorded in AOCI	(232,652)	(76,273)	22,723
Accrual for deferred loan costs	50	1,416	0
Non-cash contributions from noncontrolling interests in consolidated JVs	0	12,444	0
Non-cash distributions to noncontrolling interests	0	12,444	0
Dividends declared	196,361	184,515	171,695
Exchange of OP Units for common stock	1,536	3,540	10,292
OP Units issued for acquisition of additional interest in unconsolidated Fund	0	14,390	0
Unconsolidated Fund
Non-cash Financing Transactions
(Loss) gain recorded in AOCI	$ (410)	$ (5,023)	$ 3,052

Overview

Overview	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Overview	Overview Organization and Business Description Douglas Emmett, Inc. is a fully integrated, self-administered and self-managed REIT. We are one of the largest owners and operators of high-quality office and multifamily properties in Los Angeles County, California and Honolulu, Hawaii. Through our interest in our Operating Partnership and its subsidiaries, consolidated JVs and unconsolidated Fund, we focus on owning, acquiring, developing and managing a significant market share of top-tier office properties and premier multifamily communities in neighborhoods that possess significant supply constraints, high-end executive housing and key lifestyle amenities. The terms "us," "we" and "our" as used in the consolidated financial statements refer to Douglas Emmett, Inc. and its subsidiaries on a consolidated basis. At December 31, 2020, our Consolidated Portfolio consisted of (i) a 17.8 million square foot office portfolio, (ii) 4,287 multifamily apartment units and (iii) fee interests in two parcels of land from which we receive rent under ground leases. We also manage and own an equity interest an unconsolidated Fund which, at December 31, 2020, owned an additional 0.4 million square feet of office space. We manage our unconsolidated Fund alongside our Consolidated Portfolio, and we therefore present the statistics for our office portfolio on a Total Portfolio basis. As of December 31, 2020, our portfolio (not including two parcels of land from which we receive rent under ground leases), consisted of the following properties (including ancillary retail space): Consolidated Portfolio Total Portfolio Office Wholly-owned properties 53 53 Consolidated JV properties 16 16 Unconsolidated Fund properties — 2 69 71 Multifamily Wholly-owned properties 11 11 Consolidated JV properties 1 1 12 12 Total 81 83 Basis of Presentation The accompanying consolidated financial statements are the consolidated financial statements of Douglas Emmett, Inc. and its subsidiaries, including our Operating Partnership and our consolidated JVs. All significant intercompany balances and transactions have been eliminated in our consolidated financial statements. We consolidate entities in which we are considered to be the primary beneficiary of a VIE or have a majority of the voting interest of the entity. We are deemed to be the primary beneficiary of a VIE when we have (i) the power to direct the activities of that VIE that most significantly impact its economic performance, and (ii) the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. We do not consolidate entities in which the other parties have substantive kick-out rights to remove our power to direct the activities, most significantly impacting the economic performance, of that VIE. In determining whether we are the primary beneficiary, we consider factors such as ownership interest, management representation, authority to control decisions, and contractual and substantive participating rights of each party. We consolidate our Operating Partnership through which we conduct substantially all of our business, and own, directly and through subsidiaries, substantially all of our assets, and are obligated to repay substantially all of our liabilities, including $3.19 billion of consolidated debt. See Note 8. We also consolidate three JVs (four JVs before December 31, 2020 - see "2020 Property Disposition" in Note 3 for more information regarding the dissolution of one of our JVs before December 31, 2020). As of December 31, 2020, these consolidated entities had aggregate total consolidated assets of $9.25 billion (of which $8.86 billion related to investment in real estate), aggregate total consolidated liabilities of $5.25 billion (of which $4.74 billion related to debt), and aggregate total consolidated equity of $4.00 billion (of which $1.56 billion related to noncontrolling interests).

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Use of Estimates The preparation of consolidated financial statements in conformity with US GAAP requires management to make certain estimates that affect the reported amounts in the consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. Investment in Real Estate Acquisitions and Initial Consolidation of VIEs We account for property acquisitions as asset acquisitions, and include the acquired properties' results of operations in our results of operations from the respective acquisition date. We allocate the purchase price for asset acquisitions, which includes the capitalized transaction costs, and for the properties upon the initial consolidation of VIEs not determined to be a business, on a relative fair value basis to: (i) land, (ii) buildings and improvements, (iii) tenant improvements and identifiable intangible assets such as in-place at-market leases, (iv) acquired above- and below-market ground and tenant leases (including for renewal options), and if applicable (v) assumed debt and (vi) assumed interest rate swaps, based upon comparable sales for land, and the income approach using our estimates of expected future cash flows and other valuation techniques, which include but are not limited to, our estimates of rental rates, revenue growth rates, capitalization rates and discount rates, for other assets and liabilities. We estimate the relative fair values of the tangible assets on an ‘‘as-if-vacant’’ basis. The estimated relative fair value of acquired in-place at-market leases are the estimated costs to lease the property to the occupancy level at the date of acquisition, including the fair value of leasing commissions and legal costs. We evaluate the time period over which we expect such occupancy level to be achieved and include an estimate of the net operating costs (primarily real estate taxes, insurance and utilities) incurred during the lease-up period. Above- and below-market ground and tenant leases are recorded as an asset or liability based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between the contractual amounts to be paid or received pursuant to the in-place ground or tenant leases, respectively, and our estimate of the fair market rental rates for the corresponding in-place leases, over the remaining non-cancelable term of the lease. Assumed debt is recorded at fair value based upon the present value of the expected future payments and current interest rates. See Note 3 for our property acquisition disclosures. Depreciation Buildings and improvements are depreciated on a straight-line basis using an estimated life of forty years for buildings and fifteen years for improvements, and are carried on our balance sheet, offset by the related accumulated depreciation and any impairment charges, until they are sold. Tenant improvements are depreciated on a straight-line basis over the life of the related lease, with any remaining balance depreciated in the period of any early lease termination. Acquired in-place leases are amortized on a straight line basis over the weighted average remaining term of the acquired in-place leases, and are carried on our balance sheet, offset by the related accumulated amortization, until the related building is either sold or impaired. Lease intangibles are amortized on a straight-line basis over the related lease term, with any remaining balance amortized in the period of any early lease termination. Acquired above- and below-market tenant leases are amortized/accreted on a straight line basis over the life of the related lease and recorded as either an increase (for below-market leases) or a decrease (for above-market leases) to rental revenue. Acquired above- and below-market ground leases, from which we earn ground rent income, are amortized/accreted on a straight line basis over the life of the related lease and recorded either as an increase (for below-market leases) or a decrease (for above-market leases) to rental revenue. Acquired above- and below-market ground leases, for which we incur ground rent expense, are accreted/ amortized over the life of the related lease and recorded either as an increase (for below-market leases) or a decrease (for above-market leases) to expense. We accelerate depreciation for affected assets when we renovate our buildings or existing buildings are impacted by new developments. When assets are sold or retired, their cost and related accumulated depreciation or amortization are removed from our balance sheet with the resulting gains or losses, if any, reflected in our results of operations for the respective period. Real Estate Held for Sale Properties are classified as held for sale in our consolidated balance sheets when they meet certain requirements, including the approval of the sale of the property, the marketing of the property for sale, and our expectation that the sale will likely occur within the next 12 months. Properties classified as held for sale are carried at the lower of their carrying value or fair value less costs to sell, and we also cease to depreciate the property. As of December 31, 2020 and 2019, we did not have any properties held for sale. Dispositions Recognition of gains or losses from sales of investments in real estate requires that we meet certain revenue recognition criteria and transfer control of the real estate to the buyer. The gain or loss recorded is measured as the difference between the sales price, less costs to sell, and the carrying value of the real estate when we sell it. See Note 3 for our property disposition disclosures. Cost capitalization Costs incurred during the period of construction of real estate are capitalized. Cost capitalization of development and redevelopment activities begins during the predevelopment period, which we define as the activities that are necessary to begin the development of the property. We cease capitalization upon substantial completion of the project, but no later than one year from cessation of major construction activity. We also cease capitalization when activities necessary to prepare the property for its intended use have been suspended. Capitalized costs are included in Investment in real estate, gross, in our consolidated balance sheets. Demolition expenses and repairs and maintenance are recorded as expense when incurred. During 2020, 2019 and 2018, we capitalized $186.4 million, $75.3 million and $78.7 million of costs related to our developments, respectively, which included $4.8 million, $3.8 million and $3.5 million of capitalized interest, respectively. Ground Leases We account for our ground lease, for which we are the lessee, in accordance with Topic 842 "Leases", which we adopted on January 1, 2019 on a prospective basis. Upon adoption of the ASU, we continued to classify the lease as an operating lease, and we recognized a right-of-use asset for the land and a lease liability for the future lease payments of $10.9 million. We calculated the carrying value of the right-of-use asset and lease liability by discounting the future lease payments using our incremental borrowing rate. We adjusted the right-of-use asset carrying value for a related above-market ground lease liability of $3.4 million, which reduced the carrying value of the asset to $7.5 million. We continued to recognize the lease payments as expense, which is included in Office expenses in our consolidated statements of operations. See Note 4 for more information regarding this ground lease. See Note 14 for the fair value disclosures related to the ground lease liability. Investment in Unconsolidated Funds We account for our investments in unconsolidated Funds using the equity method because we have significant influence but not control over the Funds. Under the equity method, we initially record our investment in our Funds at cost, which includes acquisition basis difference and additional basis for capital raising costs, and subsequently adjust the investment balance for: (i) our share of the Funds net income or losses, (ii) our share of the Funds other comprehensive income or losses, (iii) our cash contributions to the Fund and (iv) our distributions received from the Fund. We remove our investment in unconsolidated Funds from our consolidated balance sheet when we sell our interest in the Funds or the Funds qualify for consolidation. Our investment in unconsolidated Funds is included in Investment in unconsolidated Funds in the consolidated balance sheets and our share of net income or losses from the Funds is included in Income from unconsolidated Funds in the consolidated statements of operations. Our share of the Funds accumulated other comprehensive income or losses is included in Accumulated other comprehensive income (loss) in our consolidated balance sheets. As of December 31, 2020 and 2019, the total investment basis difference included in our investment balance in unconsolidated Funds was $29.6 million and $27.8 million, respectively. We periodically assess whether there has been any impairment that is other than temporary in our investment in unconsolidated funds. An impairment charge would be recorded if events or changes in circumstances indicate that a decline in the fair value below the carrying value has occurred and the decline is other-than-temporary. Based upon such periodic assessments, no impairments occurred during 2020, 2019 or 2018. See Note 6 for our Fund disclosures. Impairment of Long-Lived Assets We periodically assess whether there has been any impairment in the carrying value of our properties and whenever events or changes in circumstances indicate that the carrying value of a property may not be recoverable. An impairment charge would be recorded if events or changes in circumstances indicate that a decline in the fair value below the carrying value has occurred and the decline is other-than-temporary. Recoverability of the carrying value of our properties is measured by a comparison of the carrying value to the undiscounted future cash flows expected to be generated by the property. If the carrying value exceeds the estimated undiscounted future cash flows, an impairment loss is recorded equal to the difference between the property's carrying value and its fair value based on the estimated discounted future cash flows. Based upon such periodic assessments, no impairments occurred during 2020, 2019 or 2018. In downtown Honolulu, we are converting a 25 story, 490,000 square foot office tower into approximately 500 apartments in phases over a number of years as the office space is vacated. Due to the significant change in planned use of the property, we performed annual impairment assessment in 2019 by comparing the property's expected undiscounted cash flows to the property's carrying value plus the expected development costs and concluded that there was no impairment loss. We determined the undiscounted cash flows using our estimates of the expected future cash flows which included, but were not limited to, our estimates of property's net operating income, and capitalization rates. Cash and Cash Equivalents We consider short-term investments with maturities of three months or less when purchased to be cash equivalents. Rental Revenues and Tenant Recoveries We account for our rental revenues and tenant recoveries in accordance with Topic 842 "Leases", which we adopted on January 1, 2019 on a modified retrospective basis. Topic 842 did not significantly change our accounting policy for recognizing rental revenues and tenant recoveries, and we adopted a practical expedient which allows us to account for our rental revenues and tenant recoveries on a combined basis. Rental revenues and tenant recoveries from tenant leases are included in Rental revenues and tenant recoveries in the consolidated statements of operations. All of our tenant leases are classified as operating leases. For lease terms exceeding one year, rental income is recognized on a straight-line basis over the lease term. Tenant receivables consist primarily of amounts due for contractual lease payments and reimbursements of common area maintenance expenses, property taxes, and other costs recoverable from tenants. Deferred rent receivables represent the amount by which the cumulative straight-line rental revenue recorded to date exceeds the cumulative cash rents billed to date under the lease agreement. Rental revenue from month-to-month leases or leases with no scheduled rent increases or other adjustments is recognized on a monthly basis when earned. Lease termination fees, which are included in Rental revenues and tenant recoveries in the consolidated statements of operations, are recognized on a straight line basis over the new remaining lease term when the related lease is canceled. We recognized lease termination revenue of $1.0 million, $0.5 million and $1.6 million during 2020, 2019 and 2018, respectively. Tenant improvements constructed, and owned by us, and reimbursed by tenants are recorded as our assets, and the related revenue, which are included in Rental revenues and tenant recoveries in the consolidated statements of operations, is recognized over the related lease term. We recognized revenue for reimbursement of tenant improvements of $5.9 million, $5.8 million and $3.5 million during 2020, 2019 and 2018, respectively. Estimated tenant recoveries for real estate taxes, common area maintenance and other recoverable operating expenses, which are included in Rental revenues and tenant recoveries in the consolidated statements of operations, are recognized as revenue on a gross basis in the period that the recoverable expenses are incurred. Subsequent to year-end, we perform reconciliations on a lease-by-lease basis and bill or credit each tenant for any differences between the estimated expenses we billed to the tenant and the actual expenses incurred. In accordance with Topic 842, we perform an assessment as to whether or not substantially all of the amounts due under a tenant’s lease agreement is deemed probable of collection. This assessment involves using a methodology that requires judgment and estimates about matters that are uncertain at the time the estimates are made, including tenant specific factors, specific industry conditions, and general economic trends and conditions. For leases where we have concluded it is probable that we will collect substantially all the lease payments due under those leases, we continue to record lease income on a straight-line basis over the lease term. For leases where we have concluded that it is not probable that we will collect substantially all the lease payments due under those leases, we limit the lease income to the lesser of the income recognized on a straight-line basis or cash basis. If our conclusion of collectibility changes, we will record the difference between the lease income that would have been recognized on a straight-line basis and cash basis as a current-period adjustment to rental revenues and tenant recoveries. We write-off tenant receivables and deferred rent receivables as a charge against rental revenues and tenant recoveries in the period we conclude that substantially all of the lease payments are not probable of collection. If we subsequently collect amounts that were previously written off then the amounts collected are recorded as an increase to our rental revenues and tenant recoveries in the period they are collected. Charges for uncollectible amounts, related to tenant receivables and deferred rent receivables, which for the year ended December 31, 2020 were primarily due to the impact of the COVID-19 pandemic, reduced our office revenues by $41.0 million and $2.6 million for the years ended December 31, 2020 and 2019, respectively. Before the adoption of Topic 842, we presented our tenant receivables and deferred rent receivables net of allowances on our consolidated balance sheets. We considered many factors when evaluating the level of allowances necessary, including evaluations of individual tenant receivables, historical loss activity, current economic conditions and other relevant factors. We generally obtain letters of credit or security deposits from our tenants. Tenant receivable allowances reduced our rental revenues and tenant recoveries by $2.2 million for the year ended December 31, 2018, and deferred rent receivable allowances increased our rental revenues and tenant recoveries by $0.6 million for the year ended December 31, 2018. Office Parking Revenues Office parking revenues, which are included in office Parking and other income in our consolidated statements of operations, are within the scope of Topic 606 "Revenue from Contracts with Customers". Our lease contracts generally make a specified number of parking spaces available to the tenant, and we bill and recognize parking revenues on a monthly basis in accordance with the lease agreements, generally using the monthly parking rates in effect at the time of billing. Office parking revenues were $76.1 million, $108.7 million and $102.5 million for the years ended December 31, 2020, 2019 and 2018, respectively. Office parking receivables were $0.6 million and $1.3 million as of December 31, 2020 and 2019, respectively, and are included in Tenant receivables in our consolidated balance sheets. Insurance Recoveries The amount by which insurance recoveries related to property damage exceeds any losses recognized from that damage are recorded as other income when payment has been received or confirmation of the amount of proceeds has been received. In January 2020, there was a fire in one of our residential property buildings. We carry comprehensive liability and property insurance covering all of the properties in our portfolio under blanket insurance policies to cover these kinds of losses. During the year ended December 31, 2020 we recorded $3.9 million of business interruption revenues, which is included in Multifamily rental - Parking and other income in the consolidated statements of operations, and a gain related to property damage of $13.1 million, which is included in Other income in the consolidated statements of operations. Interest Income Interest income from our short-term money market fund investments is recognized on an accrual basis. Interest income is included in other income in the consolidated statements of operations. Leasing Costs We account for our leasing costs in accordance with Topic 842 "Leases", which we adopted on January 1, 2019 on a modified retrospective basis. In accordance with Topic 842, we capitalize initial direct costs of a lease, which are costs that would not have been incurred had the lease not been executed. Costs to negotiate a lease that would have been incurred regardless of whether the lease was executed, such as employee salaries, are not considered to be initial direct costs, and are expensed as incurred. Prior to January 1, 2019, we capitalized most of our leasing costs. Loan Costs Loan costs incurred directly with the issuance of secured notes payable and revolving credit facilities are deferred and amortized to interest expense over the respective loan or credit facility term. Any unamortized amounts are written off upon early repayment of the secured notes payable, and the related cost and accumulated amortization are removed from our consolidate balance sheets. To the extent that a refinancing is considered an exchange of debt with the same lender, we account for loan costs based upon whether the old debt is determined to be modified or extinguished for accounting purposes. If the old debt is determined to be modified then we (i) continue to defer and amortize any unamortized deferred loan costs associated with the old debt at the time of the modification over the new term of the modified debt, (ii) defer and amortize the lender costs incurred in connection with the modification over the new term of the modified debt, and (iii) expense all other costs associated with the modification. If the old debt is determined to be extinguished then we (i) write off any unamortized deferred loan costs associated with the extinguished debt at the time of the extinguishment and remove the related cost and accumulated amortization from our balance sheet, (ii) expense all lender costs associated with the extinguishment, and (iii) defer and amortize all other costs incurred directly in connection with the extinguishment over the term of the new debt. In circumstances where we modify or exchange our revolving credit facility with the same lender, we account for the loan costs based upon whether the borrowing capacity of the new arrangement is (a) equal to or greater than the borrowing capacity of the old arrangement, or (b) less than the borrowing capacity of the old arrangement (borrowing capacity is defined as the product of the remaining term and the maximum available credit). If the borrowing capacity of the new arrangement is greater than or equal to the borrowing capacity of the old arrangement, then we (i) continue to defer and amortize the unamortized deferred loan costs from the old arrangement over the term of the new arrangement and (ii) defer all lender and other costs incurred directly in connection with the new arrangement over the term of the new arrangement. If the borrowing capacity of the new arrangement is less than the borrowing capacity of the old arrangement, then we (i) write off any unamortized deferred loan costs at the time of the transaction related to the old arrangement in proportion to the decrease in the borrowing capacity of the old arrangement and (ii) defer all lender and other costs incurred directly in connection with the new arrangement over the term of the new arrangement. Deferred loan costs are presented on the balance sheet as a deduction from the carrying amount of our secured notes payable and revolving credit facility. All loan costs expensed and deferred loan costs amortized are included in interest expense in our consolidated statements of operations. See Note 8 for our loan cost disclosures. Debt Discounts and Premiums Debt discounts and premiums related to recording debt assumed in connection with property acquisitions at fair value are generally amortized and accreted, respectively, over the remaining term of the related loan, which approximates the effective interest method. The amortization/accretion is included in interest expense in our consolidated statements of operations. Derivative Contracts We make use of interest rate swap contracts to manage the risk associated with changes in interest rates on our floating-rate debt. When we enter into a floating-rate term loan, we generally enter into an interest rate swap agreement for the equivalent principal amount, for a period covering the majority of the loan term, which effectively converts our floating-rate debt to a fixed-rate basis during that time. We do not speculate in derivatives and we do not make use of any other derivative instruments. When entering into derivative agreements, we generally elect to designate them as cash flow hedges for accounting purposes. Changes in fair value of hedging instruments designated as cash flow hedges are recorded in accumulated other comprehensive income (loss) (AOCI), which is a component of equity outside of earnings. For our Funds' hedging instruments designated as cash flow hedges, we record our share of the changes in fair value of the hedging instrument in AOCI. Amounts recorded in AOCI related to our designated hedges are reclassified to Interest expense as interest payments are made on the hedged floating rate debt. Amounts reported in AOCI related to our Funds' hedges are reclassified to Income from unconsolidated Funds, as interest payments are made by our Funds on their hedged floating rate debt. We present our derivatives on the balance sheet at fair value on a gross basis. Our share of the fair value of our Funds' derivatives is included in our investment in unconsolidated Funds on our consolidated balance sheet. See Note 10 for our derivative disclosures. Stock-Based Compensation We account for stock-based compensation, including stock options and LTIP Units, using the fair value method of accounting. The estimated fair value of stock options and LTIP Units, net of estimated forfeitures, is amortized over the vesting period, which is based upon service. See Note 13 for our stock-based compensation disclosures. EPS We calculate basic EPS by dividing the net income attributable to common stockholders for the period by the weighted average number of common shares outstanding during the respective period. We calculate diluted EPS by dividing the net income attributable to common stockholders for the period by the weighted average number of common shares and dilutive instruments outstanding during the respective period using the treasury stock method. Unvested LTIP Units contain non-forfeitable rights to dividends and we account for them as participating securities and include them in the computation of basic and diluted EPS using the two-class method. See Note 12 for our EPS disclosures. Segment Information Segment information is prepared on the same basis that our management reviews information for operational decision-making purposes. We operate two business segments: the acquisition, development, ownership and management of office real estate, and the acquisition, development, ownership and management of multifamily real estate. The services for our office segment include primarily rental of office space and other tenant services, including parking and storage space rental. The services for our multifamily segment include primarily rental of apartments and other tenant services, including parking and storage space rental. See Note 15 for our segment disclosures. Income Taxes We have elected to be taxed as a REIT under the Code, commencing with our initial taxable year ended December 31, 2006. To qualify as a REIT, we are required (among other things) to distribute at least 90% of our REIT taxable income to our stockholders and meet various other requirements imposed by the Code relating to matters such as operating results, asset holdings, distribution levels and diversity of stock ownership. Provided that we qualify for taxation as a REIT, we are generally not subject to corporate-level income tax on the earnings distributed currently to our stockholders that we derive from our REIT qualifying activities. If we fail to qualify as a REIT in any taxable year, and are unable to avail ourselves of certain savings provisions set forth in the Code, all of our taxable income would be subject to federal income tax at the regular corporate rate, including any applicable alternative minimum tax for taxable years prior to 2018. We have elected to treat one of our subsidiaries as a TRS, which generally may engage in any business, including the provision of customary or non-customary services to our tenants. A TRS is treated as a regular corporation and is subject to federal income tax and applicable state income and franchise taxes at regular corporate rates. Our TRSs did not have significant tax provisions or deferred income tax items for 2020, 2019 or 2018. Our subsidiaries (other than our TRS), including our Operating Partnership, are partnerships, disregarded entities, QRSs or REITs, as applicable, for federal income tax purposes. Under applicable federal and state income tax rules, the allocated share of net income or loss from disregarded entities or flow-through entities is reportable in the income tax returns of the respective owners. Accordingly, no income tax provision is included in our consolidated financial statements for these entities. New Accounting Pronouncements Changes to US GAAP are implemented by the FASB in the form of ASUs. We consider the applicability and impact of all ASUs. Other than the ASUs discussed below, the FASB has not issued any other ASUs that we expect to be applicable and have a material impact on our consolidated financial statements. ASUs Adopted ASU 2016-13 (Topic 326 - "Financial Instruments-Credit Losses") In June 2016, the FASB issued ASU No. 2016-13, "Measurement of Credit Losses on Financial Instruments", which amends "Financial Instruments-Credit Losses" (Topic 326). The ASU provides guidance for measuring credit losses on financial instruments. The ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those years, which for us was the first quarter of 2020. The amendments in the ASU should be applied on a modified-retrospective basis. The ASU impacts our measurement of credit losses for our Office parking receivables, which were $0.6 million and $1.3 million as of December 31, 2020 and December 31, 2019, respectively, and are included in Tenant receivables in our consolidated balance sheets. We adopted the ASU in the first quarter of 2020 and it did not have a material impact on our consolidated financial statements. ASU 2020-04 (Topic 848 - "Reference Rate Reform") In March 2020, the FASB issued ASU No. 2020-04, "Reference Rate Reform", which contains practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The practical expedients are optional and may be elected over time as reference rate reform activities occur. We elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients maintains the presentation of derivatives consistent with past presentation. We will continue to evaluate the impact of the ASU and may apply other elections, as applicable, as additional changes in the market occur. Our election to apply the hedge accounting expedients in the first quarter of 2020 did not have a material impact on our consolidated financial statements. Other Pronouncements FASB COVID-19 Lease Modification Accounting Relief In April 2020, the FASB staff issued a question and answer document (the “Lease Modification Q&A”) on the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. Under the existing lease accounting guidance, we would be required to determine on a lease-by-lease basis if a lease concession was the result of a new arrangement reached with the tenant (treated within the lease modification accounting framework) or if a lease concession was under the enforceable rights and obligations within the existing lease agreement (precluded from applying the lease modification accounting framework). The Lease Modification Q&A allows us, if certain criteria are met, to bypass the lease-by-lease analysis, and instead elect to either apply the lease modification accounting framework or not, with such election applied consistently to leases with similar characteristics and similar circumstances. We have availed ourselves of the election to avoid performing a lease-by-lease analysis and we have elected to apply the lease modification accounting framework for the lease concessions that meet the criteria. FASB COVID-19 Cash Flow Hedge Accounting Relief In April 2020, the FASB staff issued a question and answer document (the “Cash Flow Hedge Accounting Q&A”) on the application of cash flow hedge accounting guidance to cash flow hedges impacted by the COVID-19 pandemic. The Cash Flow Hedge Accounting Q&A clarifies that: (i) when cash flow hedge accounting has been discontinued, the delays in the timing of the forecasted transactions related to the impact of the COVID-19 pandemic may be considered rare cases caused by extenuating circumstances outside the control or influence of an entity, thereby allowing amounts deferred in AOCI to remain in AOCI until the forecasted transaction affects earnings, and (ii) missed forecasts, related to the effects of the COVID-19 pandemic, do not need to be considered when determining whether the entity has exhibited a pattern of missing forecasts that would call into question the entity’s ability to accurately predict forecasted transactions and the propriety of using cash flow hedge accounting in the future for similar transactions. The Cash Flow Hedge Accounting Q&A did not have a material impact on our consolidated financial statements.

Investment in Real Estate

Investment in Real Estate	12 Months Ended
	Dec. 31, 2020
Asset Acquisitions [Abstract]
Investment in Real Estate	Investment in Real Estate The table below summarizes our investment in real estate: (In thousands) December 31, 2020 December 31, 2019 Land $ 1,150,821 $ 1,152,684 Buildings and improvements 9,344,653 9,308,481 Tenant improvements and lease intangibles 928,867 905,753 Property under development 254,297 111,715 Investment in real estate, gross $ 11,678,638 $ 11,478,633 2020 Property Disposition In December 2020, we closed on the sale of an 80,000 square foot office property in Honolulu for a contract price of $21.0 million in cash, resulting in a gain of $6.4 million after transaction costs. The property sold was held by one of our consolidated JVs in which we owned a two-thirds capital interest. The JV was subsequently dissolved prior to December 31, 2020. 2019 Property Acquisition and JV consolidation Acquisition of The Glendon On June 7, 2019, we acquired The Glendon, a residential community in Westwood, and on June 28, 2019, we contributed the property to a consolidated JV that we manage and in which we own a 20% capital interest. The table below summarizes the purchase price allocation for the acquisition. The contract and purchase prices differ due to prorations and similar adjustments: (In thousands, except number of units) The Glendon Submarket West Los Angeles Acquisition date June 7, 2019 Contract price $ 365,100 Number of multifamily units 350 Retail square footage 50 Land $ 32,773 Buildings and improvements 333,624 Tenant improvements and lease intangibles 2,301 Acquired above- and below-market leases, net (2,114) Net assets and liabilities acquired $ 366,584 Consolidation of JV On November 21, 2019, we acquired an additional 16.3% of the equity in one of our previously unconsolidated Funds, Fund X, in exchange for $76.9 million in cash and 332 thousand OP Units valued at $14.4 million, which increased our ownership in the Fund to 89.0%. In connection with this transaction, we restructured the Fund with one remaining institutional investor. The new JV is a VIE, and as a result of the amended operating agreement, we became the primary beneficiary of the VIE and commenced consolidating the JV on November 21, 2019. The results of the consolidated JV are included in our operating results from November 21, 2019 (before November 21, 2019, our share of the Fund's net income was included in our statements of operations in Income from unconsolidated Funds). The consolidation of the JV required us to recognize the JVs identifiable assets and liabilities at fair value in our consolidated financial statements, along with the fair value of the non-controlling interest of $61.4 million. We recognized a gain of $307.9 million to adjust the carrying value of our existing investment in the JV to its estimated fair value upon consolidation. The gain was determined by taking the difference between: (a) the fair value of Fund X’s assets less its liabilities and (b) the sum of the fair value of the noncontrolling interest, carrying value of our existing investment in Fund X, and the amounts paid to acquire other Fund investors’ interests. We determined the fair value of Fund X’s assets and liabilities upon initial consolidation using our estimates of expected future cash flows and other valuation techniques. We estimated the fair values of Fund X’s properties by using the income and sales comparison valuation approaches which included, but are not limited to, our estimates of rental rates, comparable sales, revenue growth rates, capitalization rates and discount rates. Assumed debt was recorded at fair value based upon the present value of the expected future payments and current interest rates. Other acquired assets, including cash and assumed liabilities were recorded at cost due to the short-term nature of the balances. The JV owns six Class A office properties totaling 1.5 million square feet in the Los Angeles submarkets of Beverly Hills, Santa Monica, Sherman Oaks/Encino and Warner Center. The JV also owns an interest of 9.4% in our remaining unconsolidated Fund, Partnership X, which owns two additional Class A office properties totaling 386,000 square feet in Beverly Hills and Brentwood. The table below summarizes the purchase price allocation for the initial consolidation of the JV: (In thousands) JV Consolidation Consolidation date November 21, 2019 Square footage 1,454 Land $ 52,272 Buildings and improvements 831,416 Tenant improvements and lease intangibles 40,890 Acquired above- and below-market leases, net (14,198) JV interest in unconsolidated Fund 28,783 Assumed debt (403,016) Assumed interest rate swaps (4,147) Other assets and liabilities, net 26,256 Net assets acquired and liabilities assumed $ 558,256 2018 Property Acquisitions and Dispositions During 2018, we did not purchase or sell any properties.

Ground Lease

Ground Lease	12 Months Ended
	Dec. 31, 2020
Lessee Disclosure [Abstract]
Ground Lease	Ground Lease We pay rent under a ground lease located in Honolulu, Hawaii, which expires on December 31, 2086. The rent is fixed at $733 thousand per year until February 28, 2029, after which it will reset to the greater of the existing ground rent or market. As of December 31, 2020, the ground lease right-of-use asset carrying value of this ground lease was $7.5 million and the ground lease liability was $10.9 million. We incurred ground rent expense of $733 thousand during 2020, 2019 and 2018, which is included in Office expenses in our consolidated statements of operations. The table below, which assumes that the ground rent payments will continue to be $733 thousand per year after February 28, 2029, presents the future minimum ground lease payments as of December 31, 2020: Year ending December 31: (In thousands) 2021 $ 733 2022 733 2023 733 2024 733 2025 733 Thereafter 44,712 Total future minimum lease payments $ 48,377

Acquired Lease Intangibles

Acquired Lease Intangibles	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired Lease Intangibles	Acquired Lease Intangibles Summary of our Acquired Lease Intangibles (In thousands) December 31, 2020 December 31, 2019 Above-market tenant leases $ 6,848 $ 7,220 Above-market tenant leases - accumulated amortization (2,618) (1,741) Above-market ground lease where we are the lessor 1,152 1,152 Above-market ground lease - accumulated amortization (241) (224) Acquired lease intangible assets, net $ 5,141 $ 6,407 Below-market tenant leases $ 81,934 $ 102,583 Below-market tenant leases - accumulated accretion (46,711) (50,216) Acquired lease intangible liabilities, net $ 35,223 $ 52,367 Impact on the Consolidated Statements of Operations The table below summarizes the net amortization/accretion related to our above- and below-market leases: Year Ended December 31, (In thousands) 2020 2019 2018 Net accretion of above- and below-market tenant lease assets and liabilities (1) $ 15,895 $ 16,282 $ 21,992 Amortization of an above-market ground lease asset (2) (17) (18) (17) Accretion of an above-market ground lease liability (3) — — 50 Total $ 15,878 $ 16,264 $ 22,025 _______________________________________________________________________________________ (1) Recorded as a net increase to office and multifamily rental revenues. (2) Recorded as a decrease to office parking and other income. (3) Recorded as a decrease to office expense. Upon adoption of ASU 2016-02 on January 1, 2019 we adjusted the ground lease right-of-use asset carrying value with the carrying value of the above-market ground lease - see Notes 2 and 4. The table below presents the future net accretion related to our above- and below-market leases at December 31, 2020. Year ending December 31: Net increase to revenues (In thousands) 2021 $ 9,125 2022 6,482 2023 4,512 2024 3,665 2025 2,975 Thereafter 3,323 Total $ 30,082

Investments in Unconsolidated F

Investments in Unconsolidated Funds	12 Months Ended
	Dec. 31, 2020
Real Estate Investments, Net [Abstract]
Investments in Unconsolidated Funds	Investments in Unconsolidated Funds Description of our Funds As of December 31, 2020, we managed and owned an equity interest of 33.5% in an unconsolidated Fund, Partnership X, through which we and other investors in the Fund own two office properties totaling 0.4 million square feet. During the year ended December 31, 2020 we purchased additional interests of 3.6% in Partnership X for $6.6 million. As of December 31, 2019, we owned a 29.9% equity interest in Partnership X. Before November 21, 2019, we managed and owned equity interests in three unconsolidated Funds, consisting of 6.2% of the Opportunity Fund, 72.7% of Fund X and 28.4% of Partnership X, through which we and other investors in the Funds owned eight office properties totaling 1.8 million square feet. On November 21, 2019, we acquired additional interests of 16.3% in Fund X and 1.5% in Partnership X, and restructured Fund X which resulted in Fund X being treated as a consolidated JV from November 21, 2019. See Note 3 for more information regarding the consolidation of the JV. We also acquired all of the investors’ ownership interests in the Opportunity Fund (The Opportunity Fund’s only investment was an ownership interest in Fund X) and closed the Opportunity Fund. During the period January 1, 2019 to November 20, 2019 we purchased additional interests of 1.4% in Fund X and 3.9% in Partnership X. As of December 31, 2018, we owned equity interests of 24.5% in Partnership X, 6.2% in the Opportunity Fund, and 71.3% in Fund X. During the year ended December 31, 2018 we purchased an additional 1.9% interest in Fund X. Our Funds pay us fees and reimburse us for certain expenses related to property management and other services we provide, which are included in Other income in our consolidated statements of operations. We also receive distributions based on invested capital and on any profits that exceed certain specified cash returns to the investors. The table below presents cash distributions we received from our Funds: Year Ended December 31, (In thousands) 2020 2019 2018 Operating distributions received (1) $ 394 $ 6,820 $ 6,400 Capital distributions received (1) 1,236 5,853 7,349 Total distributions received (1) $ 1,630 $ 12,673 $ 13,749 __________________________________________________________ (1) The balances reflect the combined balances for Partnership X, Fund X and the Opportunity Fund through November 20, 2019 and the balances for Partnership X from November 21, 2019 through December 31, 2020. Summarized Financial Information for our Funds The tables below present selected financial information for the Funds. The amounts presented reflect 100% (not our pro-rata share) of amounts related to the Funds, and are based upon historical book value: (In thousands) December 31, 2020 December 31, 2019 Total assets (1) $ 133,617 $ 136,479 Total liabilities (1) $ 112,706 $ 113,330 Total equity (1) $ 20,911 $ 23,149 _______________________________________________ (1) The balances for both periods reflect the balances for Partnership X. Year Ended December 31, (In thousands) 2020 2019 2018 Total revenues (1) $ 15,744 $ 75,952 $ 79,590 Operating income (1) $ 3,614 $ 22,269 $ 22,959 Net income (1) $ 887 $ 7,350 $ 6,260 _________________________________________________ (1) The results of operations are not directly comparable to the prior periods; the balances reflect the combined balances for Partnership X, Fund X and the Opportunity Fund through November 20, 2019 and the balances for Partnership X from November 21, 2019 through December 31, 2020.

Other Assets

Other Assets	12 Months Ended
	Dec. 31, 2020
Other Assets [Abstract]
Other Assets	Other Assets (In thousands) December 31, 2020 December 31, 2019 Restricted cash $ 132 $ 121 Prepaid expenses 13,774 8,711 Other indefinite-lived intangibles 1,988 1,988 Furniture, fixtures and equipment, net 2,358 2,368 Other 3,331 3,233 Total other assets $ 21,583 $ 16,421

Secured Notes Payable and Revol

Secured Notes Payable and Revolving Credit Facility, Net	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Secured Notes Payable and Revolving Credit Facility, Net	Secured Notes Payable and Revolving Credit Facility, Net Description Maturity Date (1) Principal Balance as of December 31, 2020 Principal Balance as of December 31, 2019 Variable Interest Rate Fixed Interest Rate (2) Swap Maturity Date (In thousands) Consolidated Wholly-Owned Subsidiaries Term loan (3) 1/1/2024 $ 300,000 $ 300,000 LIBOR + 1.55% 3.46% 1/1/2022 Term loan (3) 3/3/2025 335,000 335,000 LIBOR + 1.30% 3.84% 3/1/2023 Fannie Mae loan (3) 4/1/2025 102,400 102,400 LIBOR + 1.25% 2.76% 3/1/2023 Term loan (3) 8/15/2026 415,000 415,000 LIBOR + 1.10% 3.07% 8/1/2025 Term loan (3) 9/19/2026 400,000 400,000 LIBOR + 1.15% 2.44% 9/1/2024 Term loan (3) 9/26/2026 200,000 200,000 LIBOR + 1.20% 2.36% 10/1/2024 Term loan (3)(4) 11/1/2026 400,000 400,000 LIBOR + 1.15% 2.18% 10/1/2024 Fannie Mae loan (3) 6/1/2027 550,000 550,000 LIBOR + 1.37% 3.16% 6/1/2022 Fannie Mae loan (3) 6/1/2029 255,000 255,000 LIBOR + 0.98% 3.26% 6/1/2027 Fannie Mae loan (3) 6/1/2029 125,000 125,000 LIBOR + 0.98% 3.25% 6/1/2027 Term loan (5) 6/1/2038 30,112 30,864 N/A 4.55% N/A Revolving credit facility (6) 8/21/2023 75,000 — LIBOR + 1.15% N/A N/A Total Wholly-Owned Subsidiary Debt 3,187,512 3,113,264 Consolidated JVs Term loan (7) — — 400,000 — — — Term loan (3) 2/28/2023 580,000 580,000 LIBOR + 1.40% 2.37% 3/1/2021 Term loan (3) 12/19/2024 400,000 400,000 LIBOR + 1.30% 3.47% 1/1/2023 Term loan (3)(8) 5/15/2027 450,000 — LIBOR + 1.35% 3.04% 4/1/2025 Term loan (3) 6/1/2029 160,000 160,000 LIBOR + 0.98% 3.25% 7/1/2027 Total Consolidated Debt (9) 4,777,512 4,653,264 Unamortized loan premium, net (10) 4,467 6,741 Unamortized deferred loan costs, net (11) (37,012) (40,947) Total Consolidated Debt, net $ 4,744,967 $ 4,619,058 _____________________________________________________ Except as noted below, our loans and revolving credit facility: (i) are non-recourse, (ii) are secured by separate collateral pools consisting of one or more properties, (iii) require interest-only monthly payments with the outstanding principal due upon maturity, and (iv) contain certain financial covenants which could require us to deposit excess cash flow with the lender under certain circumstances unless we (at our option) either provide a guarantee or additional collateral or pay down the loan within certain parameters set forth in the loan documents. Certain loans with maturity date extensions require us to meet minimum financial thresholds in order to exercise those extensions. (1) Maturity dates include the effect of extension options. (2) Effective rate as of December 31, 2020. Includes the effect of interest rate swaps and excludes the effect of prepaid loan fees. See Note 10 for details of our interest rate swaps. See below for details of our loan costs. (3) The loan agreement includes a zero-percent LIBOR floor. The corresponding swaps do not include such a floor. (4) Effective rate will increase to 2.31% on July 1, 2021. (5) Requires monthly payments of principal and interest. Principal amortization is based upon a 30-year amortization schedule. (6) $400.0 million revolving credit facility. Unused commitment fees range from 0.10% to 0.15%. The facility has a zero-percent LIBOR floor. (7) We paid this loan off during the second quarter of 2020. (8) We closed this loan during the second quarter of 2020. The effective rate will decrease to 2.26% on July 1, 2022. (9) The table does not include our unconsolidated Funds' loan - see Note 17. See Note 14 for our fair value disclosures. (10) Balances are net of accumulated amortization of $2.7 million and $0.5 million at December 31, 2020 and December 31, 2019, respectively. (11) Balances are net of accumulated amortization of $38.3 million and $30.7 million at December 31, 2020 and December 31, 2019, respectively. Debt Statistics The table below summarizes our consolidated fixed and floating rate debt: (In thousands) Principal Balance as of December 31, 2020 Principal Balance as of December 31, 2019 Aggregate swapped to fixed rate loans $ 4,672,400 $ 4,622,400 Aggregate fixed rate loans 30,112 30,864 Aggregate floating rate loans 75,000 — Total Debt $ 4,777,512 $ 4,653,264 The table below summarizes certain consolidated debt statistics as of December 31, 2020: Statistics for consolidated loans with interest fixed under the terms of the loan or a swap Principal balance (in billions) $4.70 Weighted average remaining life (including extension options) 5.3 years Weighted average remaining fixed interest period 3.1 years Weighted average annual interest rate 3.02% Future Principal Payments At December 31, 2020, the minimum future principal payments due on our consolidated secured notes payable and revolving credit facility were as follows: Year ending December 31: Including Maturity Extension Options (1) (In thousands) 2021 $ 787 2022 823 2023 655,862 2024 700,902 2025 438,343 Thereafter 2,980,795 Total future principal payments $ 4,777,512 ____________________________________________ (1) Some of our loan agreements require that we meet certain minimum financial thresholds to be able to extend the loan maturity. Loan Premium and Loan Costs The table below presents loan premium and loan costs, which are included in Interest expense in our consolidated statements of operations: Year Ended December 31, (In thousands) 2020 2019 2018 Loan premium amortized and written off $ (2,274) $ (261) $ (205) Deferred loan costs amortized and written off 7,832 14,314 8,234 Loan costs expensed 1,008 1,318 58 Total $ 6,566 $ 15,371 $ 8,087

Interest Payable, Accounts Paya

Interest Payable, Accounts Payable and Deferred Revenue	12 Months Ended
	Dec. 31, 2020
Accounts Payable and Accrued Liabilities [Abstract]
Interest Payable, Accounts Payable and Deferred Revenue	Interest Payable, Accounts Payable and Deferred Revenue (In thousands) December 31, 2020 December 31, 2019 Interest payable $ 12,199 $ 11,707 Accounts payable and accrued liabilities 81,595 66,437 Deferred revenue 50,550 53,266 Total interest payable, accounts payable and deferred revenue $ 144,344 $ 131,410

Derivative Contracts

Derivative Contracts	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Contracts	Derivative Contracts Derivative Summary As of December 31, 2020, all of our interest rate swaps, which include the interest rate swaps of our consolidated JVs and our unconsolidated Fund, were designated as cash flow hedges: Number of Interest Rate Swaps Notional (In thousands) Consolidated derivatives (1)(2)(4)(5) 39 $ 5,117,400 Unconsolidated Fund's derivative (3)(4)(5) 1 $ 110,000 ___________________________________________________ (1) The notional amount reflects 100%, not our pro-rata share, of our consolidated JVs' derivatives. (2) The notional amount includes: a. Five swaps with a combined initial notional amount of $135.0 million, which will increase to $1.08 billion in the future to replace existing swaps as they expire, and b. Two forward swaps (swaps effective after December 31, 2020) with a combined notional of $400.0 million, which will replace existing swaps as they expire. (3) The notional amount reflects 100%, not our pro-rata share, of our unconsolidated Fund's derivative. (4) Our derivative contracts do not provide for right of offset between derivative contracts. (5) See Note 14 for our derivative fair value disclosures. Credit-risk-related Contingent Features Our swaps include credit-risk related contingent features. For example, we have agreements with certain of our interest rate swap counterparties that contain a provision under which we could be declared in default on our derivative obligations if repayment of the underlying indebtedness that we are hedging is accelerated by the lender due to our default on the indebtedness. As of December 31, 2020, there have been no events of default with respect to our interest rate swaps, our consolidated JVs' swaps or our unconsolidated Fund's interest rate swap. We do not post collateral for our interest rate swap contract liabilities. The fair value of our interest rate swap contract liabilities, including accrued interest and excluding credit risk adjustments, was as follows: (In thousands) December 31, 2020 December 31, 2019 Consolidated derivatives (1) $ 225,166 $ 56,896 Unconsolidated Fund's derivative $ 208 $ — ___________________________________________________ (1) Includes 100%, not our pro-rata share, of our consolidated JVs' derivatives. Counterparty Credit Risk We are subject to credit risk from the counterparties on our interest rate swap contract assets because we do not receive collateral. We seek to minimize that risk by entering into agreements with a variety of high quality counterparties with investment grade ratings. The fair value of our interest rate swap contract assets, including accrued interest and excluding credit risk adjustments, was as follows: (In thousands) December 31, 2020 December 31, 2019 Consolidated derivatives (1)(3) $ — $ 23,275 Unconsolidated Fund's derivative (2)(3) $ — $ 963 ___________________________________________________ (1) Includes 100%, not our pro-rata share, of our consolidated JVs' derivatives. (2) The amounts reflect 100%, not our pro-rata share, of our unconsolidated Fund's derivative. (3) We did not have any interest rate swap contract asset balances as of December 31, 2020. Impact of Hedges on AOCI and the Consolidated Statements of Operations The table below presents the effect of our derivatives on our AOCI and the consolidated statements of operations: (In thousands) Year Ended December 31, 2020 2019 2018 Derivatives Designated as Cash Flow Hedges: Consolidated derivatives: Gain recorded in AOCI - adoption of ASU 2017-12 (1) $ — $ — $ 211 (Losses) gains recorded in AOCI before reclassifications (1) $ (232,652) $ (76,273) $ 22,723 Losses (gains) reclassified from AOCI to Interest Expense (1) $ 49,435 $ (24,298) $ (10,103) Interest Expense presented in the consolidated statements of operations $ (142,872) $ (143,308) $ (133,402) Unconsolidated Funds' derivatives (our share) (2) : (Losses) gains recorded in AOCI before reclassifications (1) $ (410) $ (5,023) $ 3,052 Losses (gains) reclassified from AOCI to Income from unconsolidated Funds (1) $ 106 $ (1,698) $ (813) Income from unconsolidated Funds presented in the consolidated statements of operations $ 430 $ 6,923 $ 6,400 __________________________________________________ (1) See Note 11 for our AOCI reconciliation. (2) We calculate our share by multiplying the total amount for each Fund by our equity interest in the respective Fund. Future Reclassifications from AOCI At December 31, 2020, our estimate of the AOCI related to derivatives designated as cash flow hedges that will be reclassified to earnings during the next year as interest rate swap payments are made, is as follows: (In thousands) Consolidated derivatives: Losses to be reclassified from AOCI to Interest Expense $ (72,495) Unconsolidated Fund's derivative (our share) (1) : Losses to be reclassified from AOCI to Income from unconsolidated Funds $ (46) ______________________________________________ (1) We calculate our share by multiplying the total amount for our Fund by our equity interest in the Fund.

Equity

Equity	12 Months Ended
	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Equity	Equity Transactions 2020 Transactions During the year ended December 31, 2020, (i) we acquired 94 thousand OP Units in exchange for issuing an equal number of shares of our common stock to the holders of the OP Units, and (ii) we acquired 150 OP Units for $7 thousand in cash. 2019 Transactions During the year ended December 31, 2019, (i) we acquired 222 thousand OP Units in exchange for issuing an equal number of shares of our common stock to the holders of the OP Units, (ii) we acquired 19 thousand OP Units and fully-vested LTIP Units for $734 thousand in cash, and (iii) we issued 4.9 million shares of our common stock under our ATM program for net proceeds of $201.0 million. We purchased a property on June 7, 2019 for a contract price of $365.1 million, which we subsequently contributed to one of our consolidated JVs on June 28, 2019. We manage and own a twenty percent capital interest in the JV. The acquisition and related working capital was funded with (i) a secured, non-recourse $160.0 million interest-only loan scheduled to mature in June 2029, which was assumed by the consolidated JV to which we contributed the property, (ii) a $44.0 million capital contribution by us to the JV, and (iii) a $176.0 million capital contribution by Noncontrolling interests in the JV. See Note 3 for more information regarding the property acquisition and Note 8 for more information regarding the loan. On November 21, 2019, we acquired an additional 16.3% of the equity in one of our previously unconsolidated Funds, Fund X, in exchange for $76.9 million in cash and 332 thousand OP Units valued at $14.4 million, which increased our ownership in the Fund to 89.0%. See Note 3 for more information regarding the consolidation of the JV and note 6 for more information regarding our Funds. 2018 Transactions During the year ended December 31, 2018, we (i) acquired 629 thousand OP Units in exchange for issuing an equal number of shares of our common stock to the holders of the OP Units, (ii) acquired 3 thousand OP Units for $108 thousand in cash and (iii) issued 21 thousand shares of our common stock for the exercise of 49 thousand stock options on a net settlement basis (net of the exercise price and related taxes). Noncontrolling Interests Our noncontrolling interests consist of interests in our Operating Partnership and consolidated JVs which are not owned by us. Noncontrolling interests in our Operating Partnership owned 30.1 million OP Units and fully-vested LTIP Units, and represented approximately 14.6% of our Operating Partnership's total outstanding interests as of December 31, 2020 when we owned 175.5 million OP Units (to match our 175.5 million shares of outstanding common stock). A share of our common stock, an OP Unit and an LTIP Unit (once vested and booked up) have essentially the same economic characteristics, sharing equally in the distributions from our Operating Partnership. Investors who own OP Units have the right to cause our Operating Partnership to acquire their OP Units for an amount of cash per unit equal to the market value of one share of our common stock at the date of acquisition, or, at our election, exchange their OP Units for shares of our common stock on a one-for-one b asis. LTIP Units have been granted to our employees and non-employee directors as part of their compensation. These awards generally vest over a service period and once vested can generally be converted to OP Units provided our stock price increases by more than a specified hurdle. Changes in our Ownership Interest in our Operating Partnership The table below presents the effect on our equity from net income attributable to common stockholders and changes in our ownership interest in our Operating Partnership: Year Ended December 31, (In thousands) 2020 2019 2018 Net income attributable to common stockholders $ 50,421 $ 363,713 $ 116,086 Transfers from noncontrolling interests: Exchange of OP Units with noncontrolling interests 1,535 3,540 10,292 Repurchase of OP Units from noncontrolling interests (4) (431) (59) Net transfers from noncontrolling interests 1,531 3,109 10,233 Change from net income attributable to common stockholders and transfers from noncontrolling interests $ 51,952 $ 366,822 $ 126,319 AOCI Reconciliation (1) The table below presents a reconciliation of our AOCI, which consists solely of adjustments related to derivatives designated as cash flow hedges: Year Ended December 31, (In thousands) 2020 2019 2018 Beginning balance $ (17,462) $ 53,944 $ 43,099 Adoption of ASU 2017-12 - cumulative opening balance adjustment — — 211 Consolidated derivatives: Other comprehensive (loss) gain before reclassifications (232,652) (76,273) 22,723 Reclassification of loss (gain) from AOCI to Interest Expense 49,435 (24,298) (10,103) Unconsolidated Funds' derivatives (our share) (2) : Other comprehensive (loss) gain before reclassifications (410) (5,023) 3,052 Reclassification of loss (gain) from AOCI to Income from unconsolidated Funds 106 (1,698) (813) Net current period OCI (183,521) (107,292) 15,070 OCI attributable to noncontrolling interests 52,948 35,886 (4,225) OCI attributable to common stockholders (130,573) (71,406) 10,845 Ending balance $ (148,035) $ (17,462) $ 53,944 __________________________________________________ (1) See Note 10 for the details of our derivatives and Note 14 for our derivative fair value disclosures. (2) We calculate our share by multiplying the total amount for each Fund by our equity interest in the respective Fund. Dividends (unaudited) Our common stock dividends paid during 2020 are classified for federal income tax purposes as follows: Record Date Paid Date Dividend Per Share Ordinary Income % Capital Gain % Return of Capital % Section 199A Dividend % 12/31/2019 1/15/2020 $ 0.28 49.8 % — % 50.2 % 49.8 % 3/31/2020 4/15/2020 0.28 49.8 % — % 50.2 % 49.8 % 6/30/2020 7/15/2020 0.28 49.8 % — % 50.2 % 49.8 % 9/30/2020 10/15/2020 0.28 49.8 % — % 50.2 % 49.8 % Total / Weighted Average $ 1.12 49.8 % — % 50.2 % 49.8 %

EPS

EPS	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
EPS	EPS The table below presents the calculation of basic and diluted EPS: Year Ended December 31, 2020 2019 2018 Numerator (In thousands): Net income attributable to common stockholders $ 50,421 $ 363,713 $ 116,086 Allocation to participating securities: Unvested LTIP Units (830) (1,594) (546) Net income attributable to common stockholders - basic and diluted $ 49,591 $ 362,119 $ 115,540 Denominator (In thousands): Weighted average shares of common stock outstanding - basic 175,380 173,358 169,893 Effect of dilutive securities: Stock options (1) — — 9 Weighted average shares of common stock and common stock equivalents outstanding - diluted 175,380 173,358 169,902 Net income per common share - basic $ 0.28 $ 2.09 $ 0.68 Net income per common share - diluted $ 0.28 $ 2.09 $ 0.68 ____________________________________________________ (1) Outstanding OP Units and vested LTIP Units are not included in the denominator in calculating diluted EPS, even though they may be exchanged under certain conditions for common stock on a one-for-one basis, because their associated net income (equal on a per unit basis to the Net income per common share - diluted) was already deducted in calculating Net income attributable to common stockholders. Accordingly, any exchange would not have any effect on diluted EPS. The table below presents the weighted average OP Units and vested LTIP Units outstanding for the respective periods: Year Ended December 31, (In thousands) 2020 2019 2018 OP Units 28,288 26,465 26,661 Vested LTIP Units 815 1,652 813

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation Stock Incentive Plans The Douglas Emmett, Inc. 2016 Omnibus Stock Incentive Plan, as amended, our stock incentive plan (our "2016 Plan"), permits us to make grants of incentive stock options, non-qualified stock options, stock appreciation rights, deferred stock awards, restricted stock awards, dividend equivalent rights and other stock-based awards. On May 28, 2020, our stockholders approved an amendment to the 2016 Plan to, among other things, increase the number of common shares for future awards by 9.5 million. We had an aggregate of 9.1 million shares available for grant as of December 31, 2020. Awards such as LTIP Units, deferred stock and restricted stock, which deliver the full value of the underlying shares, are counted against the Plan limits as two shares. Awards such as stock options and stock appreciation rights are counted as one share. The number of shares reserved under our 2016 Plan is also subject to adjustment in the event of a stock split, stock dividend or other change in our capitalization. Shares of stock underlying any awards that are forfeited, canceled or otherwise terminated (other than by exercise) are added back to the shares of stock available for future issuance under the 2016 Plan. For options exercised, our policy is to issue common stock on a net settlement basis - net of the exercise price and related taxes. Until it expired in 2016, we made grants under our 2006 Omnibus Stock Incentive Plan (our "2006 Plan"), which was substantially similar to our 2016 Plan. No further awards may be granted under our 2006 Plan, although awards granted under the 2006 Plan in the past and which are still outstanding will continue to be governed by the terms of our 2006 Plan. Our 2016 and 2006 Plans (the "Plans") are administered by the compensation committee of our board of directors. The compensation committee may interpret our Plans and make all determinations necessary or desirable for the administration of our Plans. The committee has full power and authority to select the participants to whom awards will be granted, to make any combination of awards to participants, to accelerate the exercisability or vesting of any award and to determine the specific terms and conditions of each award, subject to the provisions of our 2016 Plan. All officers, employees, directors and other key personnel (including consultants and prospective employees) are eligible to participate in our 2016 Plan. We have made certain awards in the form of a separate series of units of limited partnership interests in our Operating Partnership called LTIP Units, which can be granted either as free-standing awards or in tandem with other awards under our 2016 Plan. Our LTIP Units are valued by reference to the value of our common stock at the time of grant, and are subject to such conditions and restrictions as the compensation committee may determine, including continued employment or service, and/or achievement of pre-established performance goals, financial metrics and other objectives. Once vested, LTIP Units can generally be converted to OP Units on a one for one basis, provided our stock price increases by more than a specified hurdle. Employee Awards We grant stock-based compensation in the form of LTIP Units as a part of our annual incentive compensation to various employees each year, a portion which vests at the date of grant, and the remainder which vests in three equal annual installments over the three calendar years following the grant date. Compensation expense for LTIP Units which are not vested at the grant date is recognized on a straight-line basis over the requisite service period for each separately vesting portion of the award. We have also made long-term grants in the form of LTIP Units to certain employees, which generally vest in equal annual installments over four five Non-Employee Director Awards As annual fees for their services, each of our non-employee directors receives a grant of LTIP Units that vests on a quarterly basis during the year the services are rendered, which is the calendar year following the grant date. We granted 55 thousand, 38 thousand, and 37 thousand LTIP Units to our non-employee directors during 2020, 2019 and 2018, respectively. Compensation Expense At December 31, 2020, the total unrecognized stock-based compensation expense for unvested LTIP Unit awards was $19.3 million, which will be recognized over a weighted-average term of two years. The table below presents our stock-based compensation expense: Year Ended December 31, (In thousands) 2020 2019 2018 Stock-based compensation expense, net $ 21,365 $ 18,359 $ 22,299 Capitalized stock-based compensation $ 5,448 $ 4,698 $ 5,006 Intrinsic value of options exercised $ — $ — $ 1,196 Stock-Based Award Activity The table below presents our outstanding stock options activity (1) : Fully Vested Stock Options: Number of Stock Options (Thousands) Weighted Average Exercise Price Weighted Average Total Intrinsic Value of Options Exercised (Thousands) Outstanding at December 31, 2017 49 $ 12.66 16 $ 1,375 Exercised (49) $ 12.66 $ 1,196 Outstanding at December 31, 2018 — $ — 0 $ — _________________________________________________ (1) There were no options outstanding during the years ended December 31, 2020 and 2019. The table below presents our unvested LTIP Units activity: Unvested LTIP Units: Number of Units (Thousands) Weighted Average Grant Date Fair Value Grant Date Fair Value (Thousands) Outstanding at December 31, 2017 1,056 $ 26.98 Granted 935 $ 27.01 $ 25,247 Vested (1,036) $ 25.82 $ 26,740 Forfeited (10) $ 34.18 $ 333 Outstanding at December 31, 2018 945 $ 28.20 Granted 840 $ 31.92 $ 26,821 Vested (826) $ 29.13 $ 24,061 Forfeited (35) $ 35.41 $ 1,234 Outstanding at December 31, 2019 924 $ 30.48 Granted 1,190 $ 21.12 $ 25,175 Vested (1,073) $ 24.58 $ 26,369 Forfeited (57) $ 28.20 $ 1,623 Outstanding at December 31, 2020 984 $ 25.71

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Our estimates of the fair value of financial instruments were determined using available market information and widely used valuation methods. Considerable judgment is necessary to interpret market data and determine an estimated fair value. The use of different market assumptions or valuation methods may have a material effect on the estimated fair values. The FASB fair value framework hierarchy distinguishes between assumptions based on market data obtained from sources independent of the reporting entity, and the reporting entity’s own assumptions about market-based inputs. The hierarchy is as follows: Level 1 - inputs utilize unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 - inputs are observable either directly or indirectly for similar assets and liabilities in active markets. Level 3 - inputs are unobservable assumptions generated by the reporting entity As of December 31, 2020, we did not have any fair value estimates of financial instruments using Level 3 inputs. Financial instruments disclosed at fair value Short term financial instruments: The carrying amounts for cash and cash equivalents, tenant receivables, revolving credit line, interest payable, accounts payable, security deposits and dividends payable approximate fair value because of the short-term nature of these instruments. Secured notes payable: See Note 8 for the details of our secured notes payable. We estimate the fair value of our consolidated secured notes payable by calculating the credit-adjusted present value of the principal and interest payments for each secured note payable. The calculation incorporates observable market interest rates which we consider to be Level 2 inputs, assumes that the loans will be outstanding through maturity, and includes any maturity extension options. The table below presents the estimated fair value and carrying value of our secured notes payable (excluding our revolving credit facility), the carrying value includes unamortized loan premium and excludes unamortized deferred loan fees: (In thousands) December 31, 2020 December 31, 2019 Fair value $ 4,719,462 $ 4,682,305 Carrying value $ 4,706,979 $ 4,660,005 Ground lease liability: See Note 4 for the details of our ground lease. We estimate the fair value of our ground lease liability by calculating the present value of the future lease payments disclosed in Note 4 using our incremental borrowing rate. The calculation incorporates observable market interest rates which we consider to be Level 2 inputs. The table below presents the estimated fair value and carrying value of our ground lease liability: (In thousands) December 31, 2020 December 31, 2019 Fair value $ 11,865 $ 12,218 Carrying value $ 10,871 $ 10,882 Financial instruments measured at fair value Derivative instruments: See Note 10 for the details of our derivatives. We present our derivatives in the consolidated balance sheets at fair value, on a gross basis, excluding accrued interest. We estimate the fair value of our derivative instruments by calculating the credit-adjusted present value of the expected future cash flows of each derivative. The calculation incorporates the contractual terms of the derivatives, observable market interest rates which we consider to be Level 2 inputs, and credit risk adjustments to reflect the counterparty's as well as our own nonperformance risk. Our derivatives are not subject to master netting arrangements. The table below presents the estimated fair value of our derivatives: (In thousands) December 31, 2020 December 31, 2019 Derivative Assets: Fair value - c onsolidated derivatives (1) $ — $ 22,381 Fair value - unconsolidated Fund's derivative (2) $ — $ 889 Derivative Liabilities: Fair value - c onsolidated derivatives (1) $ 214,016 $ 54,616 Fair value - unconsolidated Fund's derivative (2) $ 137 $ — ___________________________________________________________________________________ (1) Consolidated derivatives, which include 100%, not our pro-rata share, of our consolidated JVs' derivatives, are included in interest rate contracts in our consolidated balance sheets. The fair values exclude accrued interest which is included in interest payable in the consolidated balance sheets. (2) The amounts reflect 100%, not our pro-rata share, of our unconsolidated Fund's derivative. Our pro-rata share of the amounts related to the unconsolidated Fund's derivative is included in our Investment in unconsolidated Funds in our consolidated balance sheets. See "Guarantees" in Note 17 regarding our unconsolidated Fund's debt and derivative.

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting Segment information is prepared on the same basis that our management reviews information for operational decision-making purposes. We operate in two business segments: (i) the acquisition, development, ownership and management of office real estate and (ii) the acquisition, development, ownership and management of multifamily real estate. The services for our office segment primarily include rental of office space and other tenant services, including parking and storage space rental. The services for our multifamily segment include rental of apartments and other tenant services, including parking and storage space rental. Asset information by segment is not reported because we do not use this measure to assess performance or make decisions to allocate resources. Therefore, depreciation and amortization expense is not allocated among segments. General and administrative expenses and interest expense are not included in segment profit as our internal reporting addresses these items on a corporate level. The table below presents the operating activity of our reportable segments: (In thousands) Year Ended December 31, 2020 2019 2018 Office Segment Total office revenues $ 771,169 $ 816,755 $ 777,931 Office expenses (268,259) (264,482) (252,751) Office segment profit 502,910 552,273 525,180 Multifamily Segment Total multifamily revenues 120,354 119,927 103,385 Multifamily expenses (37,154) (33,681) (28,116) Multifamily segment profit 83,200 86,246 75,269 Total profit from all segments $ 586,110 $ 638,519 $ 600,449 The table below presents a reconciliation of the total profit from all segments to net income attributable to common stockholders: (In thousands) Year Ended December 31, 2020 2019 2018 Total profit from all segments $ 586,110 $ 638,519 $ 600,449 General and administrative expenses (39,601) (38,068) (38,641) Depreciation and amortization (385,248) (357,743) (309,864) Other income 16,288 11,653 11,414 Other expenses (2,947) (7,216) (7,744) Income from unconsolidated Funds 430 6,923 6,400 Interest expense (142,872) (143,308) (133,402) Gain on sale of investment in real estate 6,393 — — Gain from consolidation of JV — 307,938 — Net income 38,553 418,698 128,612 Less: Net loss (income) attributable to noncontrolling interests 11,868 (54,985) (12,526) Net income attributable to common stockholders $ 50,421 $ 363,713 $ 116,086

Future Minimum Lease Rental Rec

Future Minimum Lease Rental Receipts	12 Months Ended
	Dec. 31, 2020
Lessor Disclosure [Abstract]
Future Minimum Lease Rental Receipts	Future Minimum Lease Rental Receipts We lease space to tenants primarily under non-cancelable operating leases that generally contain provisions for a base rent plus reimbursement of certain operating expenses, and we own fee interests in two parcels of land from which we receive rent under ground leases. The table below presents the future minimum base rentals on our non-cancelable office tenant and ground leases for our consolidated properties at December 31, 2020: Year Ending December 31, (In thousands) 2021 $ 635,956 2022 553,974 2023 452,930 2024 355,428 2025 266,182 Thereafter 629,410 Total future minimum base rentals (1) $ 2,893,880 _____________________________________________________ (1) Does not include (i) residential leases, which typically have a term of one year or less, (ii) holdover rent, (iii) other types of rent such as storage and antenna rent, (iv) tenant reimbursements, (v) straight line rent, (vi) amortization/accretion of acquired above/below-market lease intangibles, and (vii) percentage rents. The amounts assume that early termination options held by tenants are not exercised.

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	Commitments, Contingencies and Guarantees Legal Proceedings From time to time, we are party to various lawsuits, claims and other legal proceedings that arise in the ordinary course of our business. Excluding ordinary, routine litigation incidental to our business, we are not currently a party to any legal proceedings that we believe would reasonably be expected to have a materially adverse effect on our business, financial condition or results of operations. Concentration of Risk Tenant Receivables We are subject to credit risk with respect to our tenant receivables and deferred rent receivables related to our tenant leases. Our tenants' ability to honor the terms of their respective leases remains dependent upon economic, regulatory and social factors. We seek to minimize our credit risk from our tenant leases by: (i) targeting smaller, more affluent tenants, from a diverse mix of industries, (ii) performing credit evaluations of prospective tenants, and (iii) obtaining security deposits or letters of credit from our tenants. During the years ended December 31, 2020, 2019 and 2018, no tenant accounted for more than 10% of our total revenues. See Note 2 for the details of our charges to revenue for uncollectible amounts and allowances for tenant receivables and deferred rent receivables. Geographic Risk All of our properties, including the properties of our consolidated JVs and our unconsolidated Fund, are located in Los Angeles County, California and Honolulu, Hawaii, and we are therefore susceptible to adverse economic and regulatory developments, as well as natural disasters, in those markets. Swap Counterparty Credit Risk We are subject to credit risk with respect to our interest rate swap counterparties that we use to manage the risk associated with our floating rate debt. We do not post or receive collateral with respect to our swap transactions. Our swap contracts do not provide for right of offset between derivative contracts. See Note 10 for the details of our interest rate contracts. We seek to minimize our credit risk by entering into agreements with a variety of high quality counterparties with investment grade ratings. Cash Balances We have significant cash balances invested in a variety of short-term money market funds that are intended to preserve principal value and maintain a high degree of liquidity while providing current income. These investments are not insured against loss of principal and there is no guarantee that our investments in these funds will be redeemable at par value. We also have significant cash balances in bank accounts with high quality financial institutions with investment grade ratings. Interest bearing bank accounts at each U.S. banking institution are insured by the FDIC up to $250 thousand. Asset Retirement Obligations Conditional asset retirement obligations represent a legal obligation to perform an asset retirement activity in which the timing and/or method of settlement is conditional on a future event that may or may not be within our control. A liability for a conditional asset retirement obligation must be recorded if the fair value of the obligation can be reasonably estimated. Environmental site assessments have identified thirty-two buildings in our Consolidated Portfolio which contain asbestos, and would have to be removed in compliance with applicable environmental regulations if these properties are demolished or undergo major renovations. As of December 31, 2020, the obligations to remove the asbestos from properties which are currently undergoing major renovations, or that we plan to renovate in the future, are not material to our consolidated financial statements. As of December 31, 2020, the obligations to remove the asbestos from our other properties have indeterminable settlement dates, and we are unable to reasonably estimate the fair value of the associated conditional asset retirement obligations. Development and Other Contracts In West Los Angeles, we are building a high-rise apartment building with 376 apartments. In downtown Honolulu, we are converting a 25 story, 490,000 square foot office tower into approximately 500 apartments in phases over a number of years as the office space is vacated. As of December 31, 2020, we had an aggregate remaining contractual commitment for these and other development projects of approximately $148.2 million. As of December 31, 2020, we had an aggregate remaining contractual commitment for repositionings, capital expenditure projects and tenant improvements of approximately $23.2 million. Guarantees We have made certain environmental and other limited indemnities and guarantees covering customary non-recourse carve- outs for our unconsolidated Fund's debt. We have also guaranteed the related swap. Our Fund has agreed to indemnify us for any amounts that we would be required to pay under these agreements. As of December 31, 2020, all of the obligations under the related debt and swap agreements have been performed in accordance with the terms of those agreements. The table below summarizes our Fund's debt as of December 31, 2020. The amounts represent 100% (not our pro-rata share) of the amounts related to our Fund: Fund (1) Loan Maturity Date Principal Balance Variable Interest Rate Swap Fixed Interest Rate Swap Maturity Date Partnership X (2)(3) 3/1/2023 $ 110,000 LIBOR + 1.40% 2.30% 3/1/2021 ___________________________________________________ (1) See Note 6 for more information regarding our unconsolidated Fund. (2) Floating rate term loan, swapped to fixed, which is secured by two properties and requires monthly payments of interest only, with the outstanding principal due upon maturity. As of December 31, 2020, assuming a zero-percent LIBOR interest rate during the remaining life of the swap, the maximum future payments under the swap agreement were $0.2 million. (3) Loan agreement includes a zero-percent LIBOR floor. The corresponding swap does not include such a floor.

Schedule III - Consolidated Rea

Schedule III - Consolidated Real Estate and Accumulated Depreciation and Amortization	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III - Consolidated Real Estate and Accumulated Depreciation and Amortization	Initial Cost Cost Capitalized Subsequent to Acquisition Gross Carrying Amount Property Name Encumb-rances Land Building & Improve-ments (2) Improve-ments (2)(3) Land Building & Improve-ments (2) Total (4) Accumulated Depreciation & Amortization Year Built / Renovated Year Acquired Office Properties 100 Wilshire $ 252,033 $ 12,769 $ 78,447 $ 152,439 $ 27,108 $ 216,547 $ 243,655 $ 78,996 1968/2002/2019 1999 233 Wilshire 62,961 9,263 130,426 3,572 9,263 133,998 143,261 18,080 1975/2008-2009 2016 401 Wilshire — 9,989 29,187 133,958 21,787 151,347 173,134 52,475 1981/2000/2020 1996 429 Santa Monica 33,691 4,949 72,534 2,994 4,949 75,528 80,477 9,421 1982/2016 2017 1132 Bishop Place — 8,317 105,651 51,794 8,833 156,929 165,762 114,736 1992 2004 1299 Ocean 124,699 22,748 265,198 15,765 22,748 280,963 303,711 30,555 1980/2006/2020 2017 1901 Avenue of the Stars — 18,514 131,752 112,572 26,163 236,675 262,838 91,455 1968/2001 2001 2001 Wilshire 37,411 5,711 81,622 1,307 5,711 82,929 88,640 3,007 1980/2013 2008 8383 Wilshire 175,314 18,004 328,118 2,532 18,005 330,649 348,654 12,928 1971/2009 2008 8484 Wilshire(1) 15,898 8,846 77,780 16,307 8,846 94,087 102,933 24,354 1972/2013 2013 9100 Wilshire 142,264 13,455 258,329 2,860 13,455 261,189 274,644 9,554 1971/2016 2008 9401 Wilshire 30,112 6,740 152,310 12,643 6,740 164,953 171,693 16,086 1971/2020 2017 9601 Wilshire — 16,597 54,774 106,660 17,658 160,373 178,031 62,249 1962/2004 2001 9665 Wilshire 77,445 5,568 177,072 21,048 5,568 198,120 203,688 19,014 1971/2020 2017 10880 Wilshire 198,794 29,995 437,514 33,635 29,988 471,156 501,144 68,095 1970/2009/2020 2016 10960 Wilshire 201,893 45,844 429,769 30,124 45,852 459,885 505,737 68,382 1971/2006 2016 11777 San Vicente 44,412 5,032 15,768 29,715 6,714 43,801 50,515 17,397 1974/1998 1999 12100 Wilshire 101,203 20,164 208,755 9,268 20,164 218,023 238,187 32,833 1985 2016 12400 Wilshire — 5,013 34,283 76,833 8,828 107,301 116,129 41,710 1985 1996 15250 Ventura 22,369 2,130 48,908 696 2,130 49,604 51,734 2,155 1970/2012 2008 16000 Ventura 37,971 1,936 89,531 505 1,936 90,036 91,972 3,546 1980/2011 2008 16501 Ventura 42,944 6,759 53,112 12,937 6,759 66,049 72,808 17,250 1986/2012 2013 Beverly Hills Medical Center — 4,955 27,766 29,526 6,435 55,812 62,247 21,685 1964/2004 2004 Bishop Square 200,000 16,273 213,793 38,762 16,273 252,555 268,828 75,511 1972/1983 2010 Brentwood Court — 2,564 8,872 906 2,563 9,779 12,342 3,869 1984 2006 Brentwood Executive Plaza — 3,255 9,654 32,951 5,921 39,939 45,860 15,640 1983/1996 1995 Brentwood Medical Plaza — 5,934 27,836 1,766 5,933 29,603 35,536 11,658 1975 2006 Brentwood San Vicente Medical — 5,557 16,457 1,841 5,557 18,298 23,855 6,791 1957/1985 2006 Brentwood/Saltair — 4,468 11,615 11,621 4,775 22,929 27,704 9,556 1986 2000 Bundy/Olympic — 4,201 11,860 28,709 6,030 38,740 44,770 15,014 1991/1998 1994 Camden Medical Arts 42,276 3,102 12,221 28,587 5,298 38,612 43,910 14,777 1972/1992 1995 Carthay Campus — 6,595 70,454 5,469 6,594 75,924 82,518 16,901 1965/2008 2014 Century Park Plaza 173,000 10,275 70,761 135,178 16,153 200,061 216,214 67,506 1972/1987/2020 1999 Century Park West(1) 4,072 3,717 29,099 244 3,667 29,393 33,060 10,964 1971 2007 Columbus Center — 2,096 10,396 9,426 2,333 19,585 21,918 7,915 1987 2001 Coral Plaza — 4,028 15,019 18,832 5,366 32,513 37,879 12,864 1981 1998 Cornerstone Plaza(1) 9,928 8,245 80,633 6,016 8,263 86,631 94,894 31,950 1986 2007 Encino Gateway — 8,475 48,525 55,830 15,653 97,177 112,830 38,892 1974/1998 2000 Encino Plaza — 5,293 23,125 47,159 6,165 69,412 75,577 27,886 1971/1992 2000 Encino Terrace 105,565 12,535 59,554 102,884 15,533 159,440 174,973 58,012 1986 1999 Executive Tower(1) 14,503 6,660 32,045 57,605 9,471 86,839 96,310 34,313 1989 1995 Initial Cost Cost Capitalized Subsequent to Acquisition Gross Carrying Amount Property Name Encumb-rances Land Building & Improve-ments (2) Improve- (2)(3) Land Building & Improve-ments (2) Total (4) Accumulated Depreciation & Amortization Year Built / Renovated Year Acquired Office Properties (continued) First Financial Plaza 54,077 12,092 81,104 3,625 12,092 84,729 96,821 16,105 1986 2015 Gateway Los Angeles — 2,376 15,302 48,928 5,119 61,487 66,606 24,206 1987 1994 Harbor Court — 51 41,001 49,704 12,060 78,696 90,756 26,323 1994 2004 Landmark II — 6,086 109,259 67,603 13,070 169,878 182,948 66,413 1989 1997 Lincoln/Wilshire — 3,833 12,484 25,947 7,475 34,789 42,264 11,725 1996 2000 MB Plaza — 4,533 22,024 33,640 7,503 52,694 60,197 20,441 1971/1996 1998 Olympic Center 52,000 5,473 22,850 35,110 8,247 55,186 63,433 21,262 1985/1996 1997 One Westwood(1) 12,300 10,350 29,784 62,108 9,194 93,048 102,242 35,741 1987/2004 1999 Palisades Promenade — 5,253 15,547 54,414 9,664 65,550 75,214 25,394 1990 1995 Saltair/San Vicente 21,533 5,075 6,946 17,365 7,557 21,829 29,386 8,606 1964/1992 1997 San Vicente Plaza — 7,055 12,035 (19) 7,055 12,016 19,071 5,078 1985 2006 Santa Monica Square 48,500 5,366 18,025 22,093 6,863 38,621 45,484 15,029 1983/2004 2001 Second Street Plaza — 4,377 15,277 36,693 7,421 48,926 56,347 19,532 1991 1997 Sherman Oaks Galleria 300,000 33,213 17,820 415,540 48,328 418,245 466,573 161,123 1981/2002 1997 Studio Plaza — 9,347 73,358 122,033 15,015 189,723 204,738 74,404 1988/2004 1995 The Tower 65,969 9,643 160,602 4,628 9,643 165,230 174,873 25,697 1988/1998 2016 The Trillium(1) 18,300 20,688 143,263 81,855 21,989 223,817 245,806 85,272 1988 2005 Valley Executive Tower 104,000 8,446 67,672 105,315 11,737 169,696 181,433 65,685 1984 1998 Valley Office Plaza — 5,731 24,329 47,285 8,957 68,388 77,345 26,985 1966/2002 1998 Verona — 2,574 7,111 15,396 5,111 19,970 25,081 7,788 1991 1997 Village on Canon 61,745 5,933 11,389 50,309 13,303 54,328 67,631 20,858 1989/1995 1994 Warner Center Towers 335,000 43,110 292,147 425,283 59,418 701,122 760,540 274,820 1982-1993/2004 2002 Warner Corporate Center 34,671 11,035 65,799 1,011 11,035 66,810 77,845 3,332 1988/2015 2008 Westside Towers 141,915 8,506 79,532 81,997 14,568 155,467 170,035 60,811 1985 1998 Westwood Center 113,344 9,512 259,341 10,984 9,513 270,324 279,837 42,236 1965/2000 2016 Westwood Place 71,000 8,542 44,419 52,519 11,448 94,032 105,480 36,139 1987 1999 Multifamily Properties 555 Barrington 50,000 6,461 27,639 40,890 14,903 60,087 74,990 23,363 1989 1999 Barrington Plaza 210,000 28,568 81,485 148,028 58,208 199,873 258,081 78,529 1963/1998 1998 Barrington/Kiowa 13,940 5,720 10,052 731 5,720 10,783 16,503 4,226 1974 2006 Barry 11,370 6,426 8,179 550 6,426 8,729 15,155 3,526 1973 2006 Kiowa 5,470 2,605 3,263 469 2,605 3,732 6,337 1,485 1972 2006 Moanalua Hillside Apartments 255,000 24,791 157,353 121,051 35,365 267,830 303,195 54,824 1968/2004/2019 2005 Residences at Bishop Place — — — 35,025 — 35,025 35,025 449 2020 N/A Pacific Plaza 78,000 10,091 16,159 74,232 27,816 72,666 100,482 27,494 1963/1998 1999 The Glendon 160,000 32,773 335,925 1,257 32,775 337,180 369,955 15,307 2008 2019 The Shores 212,000 20,809 74,191 199,738 60,555 234,183 294,738 88,257 1965-67/2002 1999 Villas at Royal Kunia 94,220 42,887 71,376 15,231 35,163 94,331 129,494 41,691 1990/1995 2006 Waena Apartments 102,400 26,864 119,273 1,843 26,864 121,116 147,980 20,055 1970/2009-2014 2014 Initial Cost Cost Capitalized Subsequent to Acquisition Gross Carrying Amount Property Name Encumb-rances Land Building & Improve-ments (2) Improve- (2)(3) Land Building & Improve-ments (2) Total (4) Accumulated Depreciation & Amortization Year Built / Renovated Year Acquired Ground Lease Owensmouth/Warner — 23,848 — — 23,848 — 23,848 — N/A 2006 Total Operating Properties $ 4,777,512 $ 876,614 $ 6,593,840 $ 3,953,887 $ 1,150,821 $ 10,273,520 $ 11,424,341 $ 2,816,193 Property Under Development 1132 Bishop Place Conversion $ — $ — $ — $ 50,704 $ — $ 50,704 $ 50,704 N/A N/A Landmark II Development — 13,070 — 173,409 13,070 173,409 186,479 N/A N/A Other Developments 17,114 17,114 17,114 N/A N/A Total Property Under Development $ — $ 13,070 $ — $ 241,227 $ 13,070 $ 241,227 $ 254,297 $ — Total $ 4,777,512 $ 889,684 $ 6,593,840 $ 4,195,114 $ 1,163,891 $ 10,514,747 $ 11,678,638 $ 2,816,193 _____________________________________________________ (1) These properties are encumbered by our revolving credit facility, which had a $75.0 million balance as of December 31, 2020. (2) Includes tenant improvements and lease intangibles. (3) Net of fully depreciated and amortized tenant improvements and lease intangibles removed from our books. (4) At December 31, 2020, the aggregate federal income tax cost basis for consolidated real estate was $7.96 billion (unaudited). The table below presents a reconciliation of our investment in real estate: Year Ended December 31, 2020 2019 2018 Investment in real estate, gross Beginning balance $ 11,478,633 $ 10,030,708 $ 9,829,208 Property acquisitions — 368,698 — Consolidation of JV — 924,578 — Improvements and developments 297,558 242,854 277,229 Properties sold (24,508) — — Removal of fully depreciated and amortized tenant improvements and lease intangibles (73,045) (88,205) (75,729) Ending balance $ 11,678,638 $ 11,478,633 $ 10,030,708 Accumulated depreciation and amortization Beginning balance $ (2,518,415) $ (2,246,887) $ (2,012,752) Depreciation and amortization (385,248) (357,743) (309,864) Properties sold 10,002 — — Other accumulated depreciation and amortization 4,423 (1,990) — Removal of fully depreciated and amortized tenant improvements and lease intangibles 73,045 88,205 75,729 Ending balance $ (2,816,193) $ (2,518,415) $ (2,246,887) Investment in real estate, net $ 8,862,445 $ 8,960,218 $ 7,783,821

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with US GAAP requires management to make certain estimates that affect the reported amounts in the consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates.
Acquisitions and Initial Consolidation of VIEs	Acquisitions and Initial Consolidation of VIEs We account for property acquisitions as asset acquisitions, and include the acquired properties' results of operations in our results of operations from the respective acquisition date. We allocate the purchase price for asset acquisitions, which includes the capitalized transaction costs, and for the properties upon the initial consolidation of VIEs not determined to be a business, on a relative fair value basis to: (i) land, (ii) buildings and improvements, (iii) tenant improvements and identifiable intangible assets such as in-place at-market leases, (iv) acquired above- and below-market ground and tenant leases (including for renewal options), and if applicable (v) assumed debt and (vi) assumed interest rate swaps, based upon comparable sales for land, and the income approach using our estimates of expected future cash flows and other valuation techniques, which include but are not limited to, our estimates of rental rates, revenue growth rates, capitalization rates and discount rates, for other assets and liabilities. We estimate the relative fair values of the tangible assets on an ‘‘as-if-vacant’’ basis. The estimated relative fair value of acquired in-place at-market leases are the estimated costs to lease the property to the occupancy level at the date of acquisition, including the fair value of leasing commissions and legal costs. We evaluate the time period over which we expect such occupancy level to be achieved and include an estimate of the net operating costs (primarily real estate taxes, insurance and utilities) incurred during the lease-up period. Above- and below-market ground and tenant leases are recorded as an asset or liability based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between the contractual amounts to be paid or received pursuant to the in-place ground or tenant leases, respectively, and our estimate of the fair market rental rates for the corresponding in-place leases, over the remaining non-cancelable term of the lease. Assumed debt is recorded at fair value based upon the present value of the expected future payments and current interest rates. See Note 3 for our property acquisition disclosures.
Depreciation	Depreciation Buildings and improvements are depreciated on a straight-line basis using an estimated life of forty years for buildings and fifteen years for improvements, and are carried on our balance sheet, offset by the related accumulated depreciation and any impairment charges, until they are sold. Tenant improvements are depreciated on a straight-line basis over the life of the related lease, with any remaining balance depreciated in the period of any early lease termination. Acquired in-place leases are amortized on a straight line basis over the weighted average remaining term of the acquired in-place leases, and are carried on our balance sheet, offset by the related accumulated amortization, until the related building is either sold or impaired. Lease intangibles are amortized on a straight-line basis over the related lease term, with any remaining balance amortized in the period of any early lease termination. Acquired above- and below-market tenant leases are amortized/accreted on a straight line basis over the life of the related lease and recorded as either an increase (for below-market leases) or a decrease (for above-market leases) to rental revenue. Acquired above- and below-market ground leases, from which we earn ground rent income, are amortized/accreted on a straight line basis over the life of the related lease and recorded either as an increase (for below-market leases) or a decrease (for above-market leases) to rental revenue. Acquired above- and below-market ground leases, for which we incur ground rent expense, are accreted/ amortized over the life of the related lease and recorded either as an increase (for below-market leases) or a decrease (for above-market leases) to expense.
Real Estate Held for Sale	Real Estate Held for SaleProperties are classified as held for sale in our consolidated balance sheets when they meet certain requirements, including the approval of the sale of the property, the marketing of the property for sale, and our expectation that the sale will likely occur within the next 12 months. Properties classified as held for sale are carried at the lower of their carrying value or fair value less costs to sell, and we also cease to depreciate the property.
Dispositions	DispositionsRecognition of gains or losses from sales of investments in real estate requires that we meet certain revenue recognition criteria and transfer control of the real estate to the buyer. The gain or loss recorded is measured as the difference between the sales price, less costs to sell, and the carrying value of the real estate when we sell it. See Note 3 for our property disposition disclosures.
Cost capitalization	Cost capitalizationCosts incurred during the period of construction of real estate are capitalized. Cost capitalization of development and redevelopment activities begins during the predevelopment period, which we define as the activities that are necessary to begin the development of the property.  We cease capitalization upon substantial completion of the project, but no later than one year from cessation of major construction activity.  We also cease capitalization when activities necessary to prepare the property for its intended use have been suspended. Capitalized costs are included in Investment in real estate, gross, in our consolidated balance sheets. Demolition expenses and repairs and maintenance are recorded as expense when incurred.
Ground Leases	Ground LeasesWe account for our ground lease, for which we are the lessee, in accordance with Topic 842 "Leases", which we adopted on January 1, 2019 on a prospective basis. Upon adoption of the ASU, we continued to classify the lease as an operating lease, and we recognized a right-of-use asset for the land and a lease liability for the future lease payments of $10.9 million. We calculated the carrying value of the right-of-use asset and lease liability by discounting the future lease payments using our incremental borrowing rate. We adjusted the right-of-use asset carrying value for a related above-market ground lease liability of $3.4 million, which reduced the carrying value of the asset to $7.5 million. We continued to recognize the lease payments as expense, which is included in Office expenses in our consolidated statements of operations.
Investment in Unconsolidated Funds	Investment in Unconsolidated Funds We account for our investments in unconsolidated Funds using the equity method because we have significant influence but not control over the Funds. Under the equity method, we initially record our investment in our Funds at cost, which includes acquisition basis difference and additional basis for capital raising costs, and subsequently adjust the investment balance for: (i) our share of the Funds net income or losses, (ii) our share of the Funds other comprehensive income or losses, (iii) our cash contributions to the Fund and (iv) our distributions received from the Fund. We remove our investment in unconsolidated Funds from our consolidated balance sheet when we sell our interest in the Funds or the Funds qualify for consolidation.
Impairment of Long-Lived Assets	Impairment of Long-Lived AssetsWe periodically assess whether there has been any impairment in the carrying value of our properties and whenever events or changes in circumstances indicate that the carrying value of a property may not be recoverable. An impairment charge would be recorded if events or changes in circumstances indicate that a decline in the fair value below the carrying value has occurred and the decline is other-than-temporary. Recoverability of the carrying value of our properties is measured by a comparison of the carrying value to the undiscounted future cash flows expected to be generated by the property. If the carrying value exceeds the estimated undiscounted future cash flows, an impairment loss is recorded equal to the difference between the property's carrying value and its fair value based on the estimated discounted future cash flows.
Cash and Cash Equivalents	Cash and Cash Equivalents We consider short-term investments with maturities of three months or less when purchased to be cash equivalents.
Rental Revenue and Tenant Recoveries	Rental Revenues and Tenant Recoveries We account for our rental revenues and tenant recoveries in accordance with Topic 842 "Leases", which we adopted on January 1, 2019 on a modified retrospective basis. Topic 842 did not significantly change our accounting policy for recognizing rental revenues and tenant recoveries, and we adopted a practical expedient which allows us to account for our rental revenues and tenant recoveries on a combined basis. Rental revenues and tenant recoveries from tenant leases are included in Rental revenues and tenant recoveries in the consolidated statements of operations. All of our tenant leases are classified as operating leases. For lease terms exceeding one year, rental income is recognized on a straight-line basis over the lease term. Tenant receivables consist primarily of amounts due for contractual lease payments and reimbursements of common area maintenance expenses, property taxes, and other costs recoverable from tenants. Deferred rent receivables represent the amount by which the cumulative straight-line rental revenue recorded to date exceeds the cumulative cash rents billed to date under the lease agreement. Rental revenue from month-to-month leases or leases with no scheduled rent increases or other adjustments is recognized on a monthly basis when earned. Lease termination fees, which are included in Rental revenues and tenant recoveries in the consolidated statements of operations, are recognized on a straight line basis over the new remaining lease term when the related lease is canceled. We recognized lease termination revenue of $1.0 million, $0.5 million and $1.6 million during 2020, 2019 and 2018, respectively. Tenant improvements constructed, and owned by us, and reimbursed by tenants are recorded as our assets, and the related revenue, which are included in Rental revenues and tenant recoveries in the consolidated statements of operations, is recognized over the related lease term. We recognized revenue for reimbursement of tenant improvements of $5.9 million, $5.8 million and $3.5 million during 2020, 2019 and 2018, respectively. Estimated tenant recoveries for real estate taxes, common area maintenance and other recoverable operating expenses, which are included in Rental revenues and tenant recoveries in the consolidated statements of operations, are recognized as revenue on a gross basis in the period that the recoverable expenses are incurred. Subsequent to year-end, we perform reconciliations on a lease-by-lease basis and bill or credit each tenant for any differences between the estimated expenses we billed to the tenant and the actual expenses incurred. In accordance with Topic 842, we perform an assessment as to whether or not substantially all of the amounts due under a tenant’s lease agreement is deemed probable of collection. This assessment involves using a methodology that requires judgment and estimates about matters that are uncertain at the time the estimates are made, including tenant specific factors, specific industry conditions, and general economic trends and conditions. For leases where we have concluded it is probable that we will collect substantially all the lease payments due under those leases, we continue to record lease income on a straight-line basis over the lease term. For leases where we have concluded that it is not probable that we will collect substantially all the lease payments due under those leases, we limit the lease income to the lesser of the income recognized on a straight-line basis or cash basis. If our conclusion of collectibility changes, we will record the difference between the lease income that would have been recognized on a straight-line basis and cash basis as a current-period adjustment to rental revenues and tenant recoveries. We write-off tenant receivables and deferred rent receivables as a charge against rental revenues and tenant recoveries in the period we conclude that substantially all of the lease payments are not probable of collection. If we subsequently collect amounts that were previously written off then the amounts collected are recorded as an increase to our rental revenues and tenant recoveries in the period they are collected. Charges for uncollectible amounts, related to tenant receivables and deferred rent receivables, which for the year ended December 31, 2020 were primarily due to the impact of the COVID-19 pandemic, reduced our office revenues by $41.0 million and $2.6 million for the years ended December 31, 2020 and 2019, respectively.
Office Parking Revenues	Office Parking RevenuesOffice parking revenues, which are included in office Parking and other income in our consolidated statements of operations, are within the scope of Topic 606 "Revenue from Contracts with Customers". Our lease contracts generally make a specified number of parking spaces available to the tenant, and we bill and recognize parking revenues on a monthly basis in accordance with the lease agreements, generally using the monthly parking rates in effect at the time of billing.
Insurance Recoveries	Insurance Recoveries The amount by which insurance recoveries related to property damage exceeds any losses recognized from that damage are recorded as other income when payment has been received or confirmation of the amount of proceeds has been received. In January 2020, there was a fire in one of our residential property buildings. We carry comprehensive liability and property insurance covering all of the properties in our portfolio under blanket insurance policies to cover these kinds of losses. During the year ended December 31, 2020 we recorded $3.9 million of business interruption revenues, which is included in Multifamily rental - Parking and other income in the consolidated statements of operations, and a gain related to property damage of $13.1 million, which is included in Other income in the consolidated statements of operations.
Interest Income	Interest IncomeInterest income from our short-term money market fund investments is recognized on an accrual basis. Interest income is included in other income in the consolidated statements of operations.
Leasing Costs	Leasing Costs We account for our leasing costs in accordance with Topic 842 "Leases", which we adopted on January 1, 2019 on a modified retrospective basis. In accordance with Topic 842, we capitalize initial direct costs of a lease, which are costs that would not have been incurred had the lease not been executed. Costs to negotiate a lease that would have been incurred regardless of whether the lease was executed, such as employee salaries, are not considered to be initial direct costs, and are expensed as incurred. Prior to January 1, 2019, we capitalized most of our leasing costs.
Loan Costs	Loan Costs Loan costs incurred directly with the issuance of secured notes payable and revolving credit facilities are deferred and amortized to interest expense over the respective loan or credit facility term. Any unamortized amounts are written off upon early repayment of the secured notes payable, and the related cost and accumulated amortization are removed from our consolidate balance sheets. To the extent that a refinancing is considered an exchange of debt with the same lender, we account for loan costs based upon whether the old debt is determined to be modified or extinguished for accounting purposes. If the old debt is determined to be modified then we (i) continue to defer and amortize any unamortized deferred loan costs associated with the old debt at the time of the modification over the new term of the modified debt, (ii) defer and amortize the lender costs incurred in connection with the modification over the new term of the modified debt, and (iii) expense all other costs associated with the modification. If the old debt is determined to be extinguished then we (i) write off any unamortized deferred loan costs associated with the extinguished debt at the time of the extinguishment and remove the related cost and accumulated amortization from our balance sheet, (ii) expense all lender costs associated with the extinguishment, and (iii) defer and amortize all other costs incurred directly in connection with the extinguishment over the term of the new debt. In circumstances where we modify or exchange our revolving credit facility with the same lender, we account for the loan costs based upon whether the borrowing capacity of the new arrangement is (a) equal to or greater than the borrowing capacity of the old arrangement, or (b) less than the borrowing capacity of the old arrangement (borrowing capacity is defined as the product of the remaining term and the maximum available credit). If the borrowing capacity of the new arrangement is greater than or equal to the borrowing capacity of the old arrangement, then we (i) continue to defer and amortize the unamortized deferred loan costs from the old arrangement over the term of the new arrangement and (ii) defer all lender and other costs incurred directly in connection with the new arrangement over the term of the new arrangement. If the borrowing capacity of the new arrangement is less than the borrowing capacity of the old arrangement, then we (i) write off any unamortized deferred loan costs at the time of the transaction related to the old arrangement in proportion to the decrease in the borrowing capacity of the old arrangement and (ii) defer all lender and other costs incurred directly in connection with the new arrangement over the term of the new arrangement.
Debt Discounts and Premiums	Debt Discounts and Premiums Debt discounts and premiums related to recording debt assumed in connection with property acquisitions at fair value are generally amortized and accreted, respectively, over the remaining term of the related loan, which approximates the effective interest method. The amortization/accretion is included in interest expense in our consolidated statements of operations.
Derivative Contracts	Derivative Contracts We make use of interest rate swap contracts to manage the risk associated with changes in interest rates on our floating-rate debt. When we enter into a floating-rate term loan, we generally enter into an interest rate swap agreement for the equivalent principal amount, for a period covering the majority of the loan term, which effectively converts our floating-rate debt to a fixed-rate basis during that time. We do not speculate in derivatives and we do not make use of any other derivative instruments. When entering into derivative agreements, we generally elect to designate them as cash flow hedges for accounting purposes. Changes in fair value of hedging instruments designated as cash flow hedges are recorded in accumulated other comprehensive income (loss) (AOCI), which is a component of equity outside of earnings. For our Funds' hedging instruments designated as cash flow hedges, we record our share of the changes in fair value of the hedging instrument in AOCI. Amounts recorded in AOCI related to our designated hedges are reclassified to Interest expense as interest payments are made on the hedged floating rate debt. Amounts reported in AOCI related to our Funds' hedges are reclassified to Income from unconsolidated Funds, as interest payments are made by our Funds on their hedged floating rate debt.
Stock-Based Compensation	Stock-Based CompensationWe account for stock-based compensation, including stock options and LTIP Units, using the fair value method of accounting. The estimated fair value of stock options and LTIP Units, net of estimated forfeitures, is amortized over the vesting period, which is based upon service.
EPS	EPSWe calculate basic EPS by dividing the net income attributable to common stockholders for the period by the weighted average number of common shares outstanding during the respective period. We calculate diluted EPS by dividing the net income attributable to common stockholders for the period by the weighted average number of common shares and dilutive instruments outstanding during the respective period using the treasury stock method. Unvested LTIP Units contain non-forfeitable rights to dividends and we account for them as participating securities and include them in the computation of basic and diluted EPS using the two-class method.
Segment Information	Segment InformationSegment information is prepared on the same basis that our management reviews information for operational decision-making purposes. We operate two business segments: the acquisition, development, ownership and management of office real estate, and the acquisition, development, ownership and management of multifamily real estate. The services for our office segment include primarily rental of office space and other tenant services, including parking and storage space rental. The services for our multifamily segment include primarily rental of apartments and other tenant services, including parking and storage space rental.
Income Taxes	Income Taxes We have elected to be taxed as a REIT under the Code, commencing with our initial taxable year ended December 31, 2006. To qualify as a REIT, we are required (among other things) to distribute at least 90% of our REIT taxable income to our stockholders and meet various other requirements imposed by the Code relating to matters such as operating results, asset holdings, distribution levels and diversity of stock ownership. Provided that we qualify for taxation as a REIT, we are generally not subject to corporate-level income tax on the earnings distributed currently to our stockholders that we derive from our REIT qualifying activities. If we fail to qualify as a REIT in any taxable year, and are unable to avail ourselves of certain savings provisions set forth in the Code, all of our taxable income would be subject to federal income tax at the regular corporate rate, including any applicable alternative minimum tax for taxable years prior to 2018.
New Accounting Pronouncements	New Accounting Pronouncements Changes to US GAAP are implemented by the FASB in the form of ASUs. We consider the applicability and impact of all ASUs. Other than the ASUs discussed below, the FASB has not issued any other ASUs that we expect to be applicable and have a material impact on our consolidated financial statements. ASUs Adopted ASU 2016-13 (Topic 326 - "Financial Instruments-Credit Losses") In June 2016, the FASB issued ASU No. 2016-13, "Measurement of Credit Losses on Financial Instruments", which amends "Financial Instruments-Credit Losses" (Topic 326). The ASU provides guidance for measuring credit losses on financial instruments. The ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those years, which for us was the first quarter of 2020. The amendments in the ASU should be applied on a modified-retrospective basis. The ASU impacts our measurement of credit losses for our Office parking receivables, which were $0.6 million and $1.3 million as of December 31, 2020 and December 31, 2019, respectively, and are included in Tenant receivables in our consolidated balance sheets. We adopted the ASU in the first quarter of 2020 and it did not have a material impact on our consolidated financial statements. ASU 2020-04 (Topic 848 - "Reference Rate Reform") In March 2020, the FASB issued ASU No. 2020-04, "Reference Rate Reform", which contains practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The practical expedients are optional and may be elected over time as reference rate reform activities occur. We elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients maintains the presentation of derivatives consistent with past presentation. We will continue to evaluate the impact of the ASU and may apply other elections, as applicable, as additional changes in the market occur. Our election to apply the hedge accounting expedients in the first quarter of 2020 did not have a material impact on our consolidated financial statements. Other Pronouncements FASB COVID-19 Lease Modification Accounting Relief In April 2020, the FASB staff issued a question and answer document (the “Lease Modification Q&A”) on the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. Under the existing lease accounting guidance, we would be required to determine on a lease-by-lease basis if a lease concession was the result of a new arrangement reached with the tenant (treated within the lease modification accounting framework) or if a lease concession was under the enforceable rights and obligations within the existing lease agreement (precluded from applying the lease modification accounting framework). The Lease Modification Q&A allows us, if certain criteria are met, to bypass the lease-by-lease analysis, and instead elect to either apply the lease modification accounting framework or not, with such election applied consistently to leases with similar characteristics and similar circumstances. We have availed ourselves of the election to avoid performing a lease-by-lease analysis and we have elected to apply the lease modification accounting framework for the lease concessions that meet the criteria. FASB COVID-19 Cash Flow Hedge Accounting Relief In April 2020, the FASB staff issued a question and answer document (the “Cash Flow Hedge Accounting Q&A”) on the application of cash flow hedge accounting guidance to cash flow hedges impacted by the COVID-19 pandemic. The Cash Flow Hedge Accounting Q&A clarifies that: (i) when cash flow hedge accounting has been discontinued, the delays in the timing of the forecasted transactions related to the impact of the COVID-19 pandemic may be considered rare cases caused by extenuating circumstances outside the control or influence of an entity, thereby allowing amounts deferred in AOCI to remain in AOCI until the forecasted transaction affects earnings, and (ii) missed forecasts, related to the effects of the COVID-19 pandemic, do not need to be considered when determining whether the entity has exhibited a pattern of missing forecasts that would call into question the entity’s ability to accurately predict forecasted transactions and the propriety of using cash flow hedge accounting in the future for similar transactions. The Cash Flow Hedge Accounting Q&A did not have a material impact on our consolidated financial statements.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Our estimates of the fair value of financial instruments were determined using available market information and widely used valuation methods. Considerable judgment is necessary to interpret market data and determine an estimated fair value. The use of different market assumptions or valuation methods may have a material effect on the estimated fair values. The FASB fair value framework hierarchy distinguishes between assumptions based on market data obtained from sources independent of the reporting entity, and the reporting entity’s own assumptions about market-based inputs. The hierarchy is as follows: Level 1 - inputs utilize unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 - inputs are observable either directly or indirectly for similar assets and liabilities in active markets.

Overview (Tables)

Overview (Tables)	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Real Estate Properties	As of December 31, 2020, our portfolio (not including two parcels of land from which we receive rent under ground leases), consisted of the following properties (including ancillary retail space): Consolidated Portfolio Total Portfolio Office Wholly-owned properties 53 53 Consolidated JV properties 16 16 Unconsolidated Fund properties — 2 69 71 Multifamily Wholly-owned properties 11 11 Consolidated JV properties 1 1 12 12 Total 81 83

Investment in Real Estate (Tabl

Investment in Real Estate (Tables)	12 Months Ended
	Dec. 31, 2020
Asset Acquisitions [Abstract]
Schedule of Investment In Real Estate	The table below summarizes our investment in real estate: (In thousands) December 31, 2020 December 31, 2019 Land $ 1,150,821 $ 1,152,684 Buildings and improvements 9,344,653 9,308,481 Tenant improvements and lease intangibles 928,867 905,753 Property under development 254,297 111,715 Investment in real estate, gross $ 11,678,638 $ 11,478,633
Schedule of Purchase Price Allocation for Acquisition	The contract and purchase prices differ due to prorations and similar adjustments: (In thousands, except number of units) The Glendon Submarket West Los Angeles Acquisition date June 7, 2019 Contract price $ 365,100 Number of multifamily units 350 Retail square footage 50 Land $ 32,773 Buildings and improvements 333,624 Tenant improvements and lease intangibles 2,301 Acquired above- and below-market leases, net (2,114) Net assets and liabilities acquired $ 366,584 (In thousands) JV Consolidation Consolidation date November 21, 2019 Square footage 1,454 Land $ 52,272 Buildings and improvements 831,416 Tenant improvements and lease intangibles 40,890 Acquired above- and below-market leases, net (14,198) JV interest in unconsolidated Fund 28,783 Assumed debt (403,016) Assumed interest rate swaps (4,147) Other assets and liabilities, net 26,256 Net assets acquired and liabilities assumed $ 558,256

Ground Lease (Tables)

Ground Lease (Tables)	12 Months Ended
	Dec. 31, 2020
Lessee Disclosure [Abstract]
Schedule of Future Minimum Ground Lease Payments	The table below, which assumes that the ground rent payments will continue to be $733 thousand per year after February 28, 2029, presents the future minimum ground lease payments as of December 31, 2020: Year ending December 31: (In thousands) 2021 $ 733 2022 733 2023 733 2024 733 2025 733 Thereafter 44,712 Total future minimum lease payments $ 48,377

Acquired Lease Intangibles (Tab

Acquired Lease Intangibles (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Acquired Lease Intangibles	Summary of our Acquired Lease Intangibles (In thousands) December 31, 2020 December 31, 2019 Above-market tenant leases $ 6,848 $ 7,220 Above-market tenant leases - accumulated amortization (2,618) (1,741) Above-market ground lease where we are the lessor 1,152 1,152 Above-market ground lease - accumulated amortization (241) (224) Acquired lease intangible assets, net $ 5,141 $ 6,407 Below-market tenant leases $ 81,934 $ 102,583 Below-market tenant leases - accumulated accretion (46,711) (50,216) Acquired lease intangible liabilities, net $ 35,223 $ 52,367
Schedule of Net Amortization or Accretion of Above- and Below-Market Leases	The table below summarizes the net amortization/accretion related to our above- and below-market leases: Year Ended December 31, (In thousands) 2020 2019 2018 Net accretion of above- and below-market tenant lease assets and liabilities (1) $ 15,895 $ 16,282 $ 21,992 Amortization of an above-market ground lease asset (2) (17) (18) (17) Accretion of an above-market ground lease liability (3) — — 50 Total $ 15,878 $ 16,264 $ 22,025 _______________________________________________________________________________________ (1) Recorded as a net increase to office and multifamily rental revenues. (2) Recorded as a decrease to office parking and other income. (3) Recorded as a decrease to office expense. Upon adoption of ASU 2016-02 on January 1, 2019 we adjusted the ground lease right-of-use asset carrying value with the carrying value of the above-market ground lease - see Notes 2 and 4.
Schedule of Estimated Future Net Accretion	The table below presents the future net accretion related to our above- and below-market leases at December 31, 2020. Year ending December 31: Net increase to revenues (In thousands) 2021 $ 9,125 2022 6,482 2023 4,512 2024 3,665 2025 2,975 Thereafter 3,323 Total $ 30,082

Investments in Unconsolidated_2

Investments in Unconsolidated Funds (Tables)	12 Months Ended
	Dec. 31, 2020
Real Estate Investments, Net [Abstract]
Summary of Statement of Operations for Investments in Unconsolidated Real Estate Funds and Cash Received from Funds	The table below presents cash distributions we received from our Funds: Year Ended December 31, (In thousands) 2020 2019 2018 Operating distributions received (1) $ 394 $ 6,820 $ 6,400 Capital distributions received (1) 1,236 5,853 7,349 Total distributions received (1) $ 1,630 $ 12,673 $ 13,749 __________________________________________________________ (1) The balances reflect the combined balances for Partnership X, Fund X and the Opportunity Fund through November 20, 2019 and the balances for Partnership X from November 21, 2019 through December 31, 2020. (In thousands) December 31, 2020 December 31, 2019 Total assets (1) $ 133,617 $ 136,479 Total liabilities (1) $ 112,706 $ 113,330 Total equity (1) $ 20,911 $ 23,149 _______________________________________________ (1) The balances for both periods reflect the balances for Partnership X. Year Ended December 31, (In thousands) 2020 2019 2018 Total revenues (1) $ 15,744 $ 75,952 $ 79,590 Operating income (1) $ 3,614 $ 22,269 $ 22,959 Net income (1) $ 887 $ 7,350 $ 6,260 _________________________________________________ (1) The results of operations are not directly comparable to the prior periods; the balances reflect the combined balances for Partnership X, Fund X and the Opportunity Fund through November 20, 2019 and the balances for Partnership X from November 21, 2019 through December 31, 2020.

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Other Assets [Abstract]
Schedule of Other Assets	(In thousands) December 31, 2020 December 31, 2019 Restricted cash $ 132 $ 121 Prepaid expenses 13,774 8,711 Other indefinite-lived intangibles 1,988 1,988 Furniture, fixtures and equipment, net 2,358 2,368 Other 3,331 3,233 Total other assets $ 21,583 $ 16,421

Secured Notes Payable and Rev_2

Secured Notes Payable and Revolving Credit Facility, Net (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of Secured Notes Payable and Revolving Credit Facility	Description Maturity Date (1) Principal Balance as of December 31, 2020 Principal Balance as of December 31, 2019 Variable Interest Rate Fixed Interest Rate (2) Swap Maturity Date (In thousands) Consolidated Wholly-Owned Subsidiaries Term loan (3) 1/1/2024 $ 300,000 $ 300,000 LIBOR + 1.55% 3.46% 1/1/2022 Term loan (3) 3/3/2025 335,000 335,000 LIBOR + 1.30% 3.84% 3/1/2023 Fannie Mae loan (3) 4/1/2025 102,400 102,400 LIBOR + 1.25% 2.76% 3/1/2023 Term loan (3) 8/15/2026 415,000 415,000 LIBOR + 1.10% 3.07% 8/1/2025 Term loan (3) 9/19/2026 400,000 400,000 LIBOR + 1.15% 2.44% 9/1/2024 Term loan (3) 9/26/2026 200,000 200,000 LIBOR + 1.20% 2.36% 10/1/2024 Term loan (3)(4) 11/1/2026 400,000 400,000 LIBOR + 1.15% 2.18% 10/1/2024 Fannie Mae loan (3) 6/1/2027 550,000 550,000 LIBOR + 1.37% 3.16% 6/1/2022 Fannie Mae loan (3) 6/1/2029 255,000 255,000 LIBOR + 0.98% 3.26% 6/1/2027 Fannie Mae loan (3) 6/1/2029 125,000 125,000 LIBOR + 0.98% 3.25% 6/1/2027 Term loan (5) 6/1/2038 30,112 30,864 N/A 4.55% N/A Revolving credit facility (6) 8/21/2023 75,000 — LIBOR + 1.15% N/A N/A Total Wholly-Owned Subsidiary Debt 3,187,512 3,113,264 Consolidated JVs Term loan (7) — — 400,000 — — — Term loan (3) 2/28/2023 580,000 580,000 LIBOR + 1.40% 2.37% 3/1/2021 Term loan (3) 12/19/2024 400,000 400,000 LIBOR + 1.30% 3.47% 1/1/2023 Term loan (3)(8) 5/15/2027 450,000 — LIBOR + 1.35% 3.04% 4/1/2025 Term loan (3) 6/1/2029 160,000 160,000 LIBOR + 0.98% 3.25% 7/1/2027 Total Consolidated Debt (9) 4,777,512 4,653,264 Unamortized loan premium, net (10) 4,467 6,741 Unamortized deferred loan costs, net (11) (37,012) (40,947) Total Consolidated Debt, net $ 4,744,967 $ 4,619,058 _____________________________________________________ Except as noted below, our loans and revolving credit facility: (i) are non-recourse, (ii) are secured by separate collateral pools consisting of one or more properties, (iii) require interest-only monthly payments with the outstanding principal due upon maturity, and (iv) contain certain financial covenants which could require us to deposit excess cash flow with the lender under certain circumstances unless we (at our option) either provide a guarantee or additional collateral or pay down the loan within certain parameters set forth in the loan documents. Certain loans with maturity date extensions require us to meet minimum financial thresholds in order to exercise those extensions. (1) Maturity dates include the effect of extension options. (2) Effective rate as of December 31, 2020. Includes the effect of interest rate swaps and excludes the effect of prepaid loan fees. See Note 10 for details of our interest rate swaps. See below for details of our loan costs. (3) The loan agreement includes a zero-percent LIBOR floor. The corresponding swaps do not include such a floor. (4) Effective rate will increase to 2.31% on July 1, 2021. (5) Requires monthly payments of principal and interest. Principal amortization is based upon a 30-year amortization schedule. (6) $400.0 million revolving credit facility. Unused commitment fees range from 0.10% to 0.15%. The facility has a zero-percent LIBOR floor. (7) We paid this loan off during the second quarter of 2020. (8) We closed this loan during the second quarter of 2020. The effective rate will decrease to 2.26% on July 1, 2022. (9) The table does not include our unconsolidated Funds' loan - see Note 17. See Note 14 for our fair value disclosures. (10) Balances are net of accumulated amortization of $2.7 million and $0.5 million at December 31, 2020 and December 31, 2019, respectively. (11) Balances are net of accumulated amortization of $38.3 million and $30.7 million at December 31, 2020 and December 31, 2019, respectively. Debt Statistics The table below summarizes our consolidated fixed and floating rate debt: (In thousands) Principal Balance as of December 31, 2020 Principal Balance as of December 31, 2019 Aggregate swapped to fixed rate loans $ 4,672,400 $ 4,622,400 Aggregate fixed rate loans 30,112 30,864 Aggregate floating rate loans 75,000 — Total Debt $ 4,777,512 $ 4,653,264 The table below summarizes certain consolidated debt statistics as of December 31, 2020: Statistics for consolidated loans with interest fixed under the terms of the loan or a swap Principal balance (in billions) $4.70 Weighted average remaining life (including extension options) 5.3 years Weighted average remaining fixed interest period 3.1 years Weighted average annual interest rate 3.02%
Schedule of Minimum Future Principal Payments	At December 31, 2020, the minimum future principal payments due on our consolidated secured notes payable and revolving credit facility were as follows: Year ending December 31: Including Maturity Extension Options (1) (In thousands) 2021 $ 787 2022 823 2023 655,862 2024 700,902 2025 438,343 Thereafter 2,980,795 Total future principal payments $ 4,777,512 ____________________________________________ (1) Some of our loan agreements require that we meet certain minimum financial thresholds to be able to extend the loan maturity.
Schedule of Loan Costs and Amortization of Deferred Loan Costs	The table below presents loan premium and loan costs, which are included in Interest expense in our consolidated statements of operations: Year Ended December 31, (In thousands) 2020 2019 2018 Loan premium amortized and written off $ (2,274) $ (261) $ (205) Deferred loan costs amortized and written off 7,832 14,314 8,234 Loan costs expensed 1,008 1,318 58 Total $ 6,566 $ 15,371 $ 8,087

Interest Payable, Accounts Pa_2

Interest Payable, Accounts Payable and Deferred Revenue (Tables)	12 Months Ended
	Dec. 31, 2020
Accounts Payable and Accrued Liabilities [Abstract]
Schedule of Interest Payable, Accounts Payable and Deferred Revenue	(In thousands) December 31, 2020 December 31, 2019 Interest payable $ 12,199 $ 11,707 Accounts payable and accrued liabilities 81,595 66,437 Deferred revenue 50,550 53,266 Total interest payable, accounts payable and deferred revenue $ 144,344 $ 131,410

Derivative Contracts (Tables)

Derivative Contracts (Tables)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Swap Derivatives	As of December 31, 2020, all of our interest rate swaps, which include the interest rate swaps of our consolidated JVs and our unconsolidated Fund, were designated as cash flow hedges: Number of Interest Rate Swaps Notional (In thousands) Consolidated derivatives (1)(2)(4)(5) 39 $ 5,117,400 Unconsolidated Fund's derivative (3)(4)(5) 1 $ 110,000 ___________________________________________________ (1) The notional amount reflects 100%, not our pro-rata share, of our consolidated JVs' derivatives. (2) The notional amount includes: a. Five swaps with a combined initial notional amount of $135.0 million, which will increase to $1.08 billion in the future to replace existing swaps as they expire, and b. Two forward swaps (swaps effective after December 31, 2020) with a combined notional of $400.0 million, which will replace existing swaps as they expire. (3) The notional amount reflects 100%, not our pro-rata share, of our unconsolidated Fund's derivative. (4) Our derivative contracts do not provide for right of offset between derivative contracts. (5) See Note 14 for our derivative fair value disclosures.
Schedule of Derivative Liabilities at Fair Value	The fair value of our interest rate swap contract liabilities, including accrued interest and excluding credit risk adjustments, was as follows: (In thousands) December 31, 2020 December 31, 2019 Consolidated derivatives (1) $ 225,166 $ 56,896 Unconsolidated Fund's derivative $ 208 $ — ___________________________________________________ (1) Includes 100%, not our pro-rata share, of our consolidated JVs' derivatives.
Schedule of Derivative Assets at Fair Value	The fair value of our interest rate swap contract assets, including accrued interest and excluding credit risk adjustments, was as follows: (In thousands) December 31, 2020 December 31, 2019 Consolidated derivatives (1)(3) $ — $ 23,275 Unconsolidated Fund's derivative (2)(3) $ — $ 963 ___________________________________________________ (1) Includes 100%, not our pro-rata share, of our consolidated JVs' derivatives. (2) The amounts reflect 100%, not our pro-rata share, of our unconsolidated Fund's derivative. (3) We did not have any interest rate swap contract asset balances as of
Effect of Derivative Instruments on Consolidated Statements of Operations	The table below presents the effect of our derivatives on our AOCI and the consolidated statements of operations: (In thousands) Year Ended December 31, 2020 2019 2018 Derivatives Designated as Cash Flow Hedges: Consolidated derivatives: Gain recorded in AOCI - adoption of ASU 2017-12 (1) $ — $ — $ 211 (Losses) gains recorded in AOCI before reclassifications (1) $ (232,652) $ (76,273) $ 22,723 Losses (gains) reclassified from AOCI to Interest Expense (1) $ 49,435 $ (24,298) $ (10,103) Interest Expense presented in the consolidated statements of operations $ (142,872) $ (143,308) $ (133,402) Unconsolidated Funds' derivatives (our share) (2) : (Losses) gains recorded in AOCI before reclassifications (1) $ (410) $ (5,023) $ 3,052 Losses (gains) reclassified from AOCI to Income from unconsolidated Funds (1) $ 106 $ (1,698) $ (813) Income from unconsolidated Funds presented in the consolidated statements of operations $ 430 $ 6,923 $ 6,400 __________________________________________________ (1) See Note 11 for our AOCI reconciliation. (2) We calculate our share by multiplying the total amount for each Fund by our equity interest in the respective Fund.
Schedule of Future Reclassifications from AOCI	At December 31, 2020, our estimate of the AOCI related to derivatives designated as cash flow hedges that will be reclassified to earnings during the next year as interest rate swap payments are made, is as follows: (In thousands) Consolidated derivatives: Losses to be reclassified from AOCI to Interest Expense $ (72,495) Unconsolidated Fund's derivative (our share) (1) : Losses to be reclassified from AOCI to Income from unconsolidated Funds $ (46) ______________________________________________

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Net Income Attributable to Common Stockholders and Transfers (to) from Noncontrolling Interests	The table below presents the effect on our equity from net income attributable to common stockholders and changes in our ownership interest in our Operating Partnership: Year Ended December 31, (In thousands) 2020 2019 2018 Net income attributable to common stockholders $ 50,421 $ 363,713 $ 116,086 Transfers from noncontrolling interests: Exchange of OP Units with noncontrolling interests 1,535 3,540 10,292 Repurchase of OP Units from noncontrolling interests (4) (431) (59) Net transfers from noncontrolling interests 1,531 3,109 10,233 Change from net income attributable to common stockholders and transfers from noncontrolling interests $ 51,952 $ 366,822 $ 126,319
Schedule of Accumulated Other Comprehensive Income (Loss)	The table below presents a reconciliation of our AOCI, which consists solely of adjustments related to derivatives designated as cash flow hedges: Year Ended December 31, (In thousands) 2020 2019 2018 Beginning balance $ (17,462) $ 53,944 $ 43,099 Adoption of ASU 2017-12 - cumulative opening balance adjustment — — 211 Consolidated derivatives: Other comprehensive (loss) gain before reclassifications (232,652) (76,273) 22,723 Reclassification of loss (gain) from AOCI to Interest Expense 49,435 (24,298) (10,103) Unconsolidated Funds' derivatives (our share) (2) : Other comprehensive (loss) gain before reclassifications (410) (5,023) 3,052 Reclassification of loss (gain) from AOCI to Income from unconsolidated Funds 106 (1,698) (813) Net current period OCI (183,521) (107,292) 15,070 OCI attributable to noncontrolling interests 52,948 35,886 (4,225) OCI attributable to common stockholders (130,573) (71,406) 10,845 Ending balance $ (148,035) $ (17,462) $ 53,944 __________________________________________________ (1) See Note 10 for the details of our derivatives and Note 14 for our derivative fair value disclosures.
Common Stock Dividends Classification for United States Federal Income Tax Purposes	Our common stock dividends paid during 2020 are classified for federal income tax purposes as follows: Record Date Paid Date Dividend Per Share Ordinary Income % Capital Gain % Return of Capital % Section 199A Dividend % 12/31/2019 1/15/2020 $ 0.28 49.8 % — % 50.2 % 49.8 % 3/31/2020 4/15/2020 0.28 49.8 % — % 50.2 % 49.8 % 6/30/2020 7/15/2020 0.28 49.8 % — % 50.2 % 49.8 % 9/30/2020 10/15/2020 0.28 49.8 % — % 50.2 % 49.8 % Total / Weighted Average $ 1.12 49.8 % — % 50.2 % 49.8 %

EPS (Tables)

EPS (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Schedule of Calculation of Basic and Diluted EPS	The table below presents the calculation of basic and diluted EPS: Year Ended December 31, 2020 2019 2018 Numerator (In thousands): Net income attributable to common stockholders $ 50,421 $ 363,713 $ 116,086 Allocation to participating securities: Unvested LTIP Units (830) (1,594) (546) Net income attributable to common stockholders - basic and diluted $ 49,591 $ 362,119 $ 115,540 Denominator (In thousands): Weighted average shares of common stock outstanding - basic 175,380 173,358 169,893 Effect of dilutive securities: Stock options (1) — — 9 Weighted average shares of common stock and common stock equivalents outstanding - diluted 175,380 173,358 169,902 Net income per common share - basic $ 0.28 $ 2.09 $ 0.68 Net income per common share - diluted $ 0.28 $ 2.09 $ 0.68 ____________________________________________________ (1) Outstanding OP Units and vested LTIP Units are not included in the denominator in calculating diluted EPS, even though they may be exchanged under certain conditions for common stock on a one-for-one basis, because their associated net income (equal on a per unit basis to the Net income per common share - diluted) was already deducted in calculating Net income attributable to common stockholders. Accordingly, any exchange would not have any effect on diluted EPS. The table below presents the weighted average OP Units and vested LTIP Units outstanding for the respective periods: Year Ended December 31, (In thousands) 2020 2019 2018 OP Units 28,288 26,465 26,661 Vested LTIP Units 815 1,652 813

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Schedule of Stock-Based Compensation Expense	The table below presents our stock-based compensation expense: Year Ended December 31, (In thousands) 2020 2019 2018 Stock-based compensation expense, net $ 21,365 $ 18,359 $ 22,299 Capitalized stock-based compensation $ 5,448 $ 4,698 $ 5,006 Intrinsic value of options exercised $ — $ — $ 1,196
Summary of Stock-Based Award Activity	The table below presents our outstanding stock options activity (1) : Fully Vested Stock Options: Number of Stock Options (Thousands) Weighted Average Exercise Price Weighted Average Total Intrinsic Value of Options Exercised (Thousands) Outstanding at December 31, 2017 49 $ 12.66 16 $ 1,375 Exercised (49) $ 12.66 $ 1,196 Outstanding at December 31, 2018 — $ — 0 $ — _________________________________________________ (1) There were no options outstanding during the years ended December 31, 2020 and 2019.
Schedule of Unvested LTIP Units	The table below presents our unvested LTIP Units activity: Unvested LTIP Units: Number of Units (Thousands) Weighted Average Grant Date Fair Value Grant Date Fair Value (Thousands) Outstanding at December 31, 2017 1,056 $ 26.98 Granted 935 $ 27.01 $ 25,247 Vested (1,036) $ 25.82 $ 26,740 Forfeited (10) $ 34.18 $ 333 Outstanding at December 31, 2018 945 $ 28.20 Granted 840 $ 31.92 $ 26,821 Vested (826) $ 29.13 $ 24,061 Forfeited (35) $ 35.41 $ 1,234 Outstanding at December 31, 2019 924 $ 30.48 Granted 1,190 $ 21.12 $ 25,175 Vested (1,073) $ 24.58 $ 26,369 Forfeited (57) $ 28.20 $ 1,623 Outstanding at December 31, 2020 984 $ 25.71

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of Estimated Fair Value and Carrying Value of Liabilities	The table below presents the estimated fair value and carrying value of our secured notes payable (excluding our revolving credit facility), the carrying value includes unamortized loan premium and excludes unamortized deferred loan fees: (In thousands) December 31, 2020 December 31, 2019 Fair value $ 4,719,462 $ 4,682,305 Carrying value $ 4,706,979 $ 4,660,005 (In thousands) December 31, 2020 December 31, 2019 Fair value $ 11,865 $ 12,218 Carrying value $ 10,871 $ 10,882
Schedule of Financial Instruments Measured at Fair Value	The table below presents the estimated fair value of our derivatives: (In thousands) December 31, 2020 December 31, 2019 Derivative Assets: Fair value - c onsolidated derivatives (1) $ — $ 22,381 Fair value - unconsolidated Fund's derivative (2) $ — $ 889 Derivative Liabilities: Fair value - c onsolidated derivatives (1) $ 214,016 $ 54,616 Fair value - unconsolidated Fund's derivative (2) $ 137 $ — ___________________________________________________________________________________ (1) Consolidated derivatives, which include 100%, not our pro-rata share, of our consolidated JVs' derivatives, are included in interest rate contracts in our consolidated balance sheets. The fair values exclude accrued interest which is included in interest payable in the consolidated balance sheets. (2) The amounts reflect 100%, not our pro-rata share, of our unconsolidated Fund's derivative. Our pro-rata share of the amounts related to the unconsolidated Fund's derivative is included in our Investment in unconsolidated Funds in our consolidated balance sheets. See "Guarantees" in Note 17 regarding our unconsolidated Fund's debt and derivative.

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Summary of Operating Activity of Reportable Segments	The table below presents the operating activity of our reportable segments: (In thousands) Year Ended December 31, 2020 2019 2018 Office Segment Total office revenues $ 771,169 $ 816,755 $ 777,931 Office expenses (268,259) (264,482) (252,751) Office segment profit 502,910 552,273 525,180 Multifamily Segment Total multifamily revenues 120,354 119,927 103,385 Multifamily expenses (37,154) (33,681) (28,116) Multifamily segment profit 83,200 86,246 75,269 Total profit from all segments $ 586,110 $ 638,519 $ 600,449
Reconciliation of Segment Profit to Net Income (Loss) Attributable to Common Stockholders	The table below presents a reconciliation of the total profit from all segments to net income attributable to common stockholders: (In thousands) Year Ended December 31, 2020 2019 2018 Total profit from all segments $ 586,110 $ 638,519 $ 600,449 General and administrative expenses (39,601) (38,068) (38,641) Depreciation and amortization (385,248) (357,743) (309,864) Other income 16,288 11,653 11,414 Other expenses (2,947) (7,216) (7,744) Income from unconsolidated Funds 430 6,923 6,400 Interest expense (142,872) (143,308) (133,402) Gain on sale of investment in real estate 6,393 — — Gain from consolidation of JV — 307,938 — Net income 38,553 418,698 128,612 Less: Net loss (income) attributable to noncontrolling interests 11,868 (54,985) (12,526) Net income attributable to common stockholders $ 50,421 $ 363,713 $ 116,086

Future Minimum Lease Rental R_2

Future Minimum Lease Rental Receipts (Tables)	12 Months Ended
	Dec. 31, 2020
Lessor Disclosure [Abstract]
Schedule of Future Minimum Base Rentals on Non-cancelable Office and Ground Operating Leases	The table below presents the future minimum base rentals on our non-cancelable office tenant and ground leases for our consolidated properties at December 31, 2020: Year Ending December 31, (In thousands) 2021 $ 635,956 2022 553,974 2023 452,930 2024 355,428 2025 266,182 Thereafter 629,410 Total future minimum base rentals (1) $ 2,893,880 _____________________________________________________ (1) Does not include (i) residential leases, which typically have a term of one year or less, (ii) holdover rent, (iii) other types of rent such as storage and antenna rent, (iv) tenant reimbursements, (v) straight line rent, (vi) amortization/accretion of acquired above/below-market lease intangibles, and (vii) percentage rents. The amounts assume that early termination options held by tenants are not exercised.

Commitments, Contingencies an_2

Commitments, Contingencies and Guarantees (Tables)	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Schedule of Debt Related to Unconsolidated Funds	The table below summarizes our Fund's debt as of December 31, 2020. The amounts represent 100% (not our pro-rata share) of the amounts related to our Fund: Fund (1) Loan Maturity Date Principal Balance Variable Interest Rate Swap Fixed Interest Rate Swap Maturity Date Partnership X (2)(3) 3/1/2023 $ 110,000 LIBOR + 1.40% 2.30% 3/1/2021 ___________________________________________________ (1) See Note 6 for more information regarding our unconsolidated Fund. (2) Floating rate term loan, swapped to fixed, which is secured by two properties and requires monthly payments of interest only, with the outstanding principal due upon maturity. As of December 31, 2020, assuming a zero-percent LIBOR interest rate during the remaining life of the swap, the maximum future payments under the swap agreement were $0.2 million. (3) Loan agreement includes a zero-percent LIBOR floor. The corresponding swap does not include such a floor.

Overview - Narrative (Details)

Overview - Narrative (Details) $ in Thousands, ft² in Millions	Dec. 31, 2020USD ($)ft²unitland_parceljoint_venture	Dec. 31, 2019USD ($)	Nov. 20, 2019ft²	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Real Estate Properties [Line Items]
Area of real estate portfolio (sq ft) | ft²			1.8
Consolidated debt	$ 4,777,512	$ 4,653,264
Number of joint ventures consolidated | joint_venture	4
Consolidated assets	$ 9,250,825	9,349,301
Consolidated investment in real estate	8,862,445	8,960,218
Consolidated liabilities	5,254,806	4,978,367
Consolidated liabilities related to debt	4,744,967	4,619,058
Consolidated equity	3,996,019	4,370,934		$ 3,848,430	$ 3,902,049
Consolidated equity related to noncontrolling interest	$ 1,558,928	1,658,862
Wholly owned and Consolidated properties
Real Estate Properties [Line Items]
Number of land parcels subject to ground lease | land_parcel	2
Wholly owned and Consolidated properties | Office
Real Estate Properties [Line Items]
Area of real estate portfolio (sq ft) | ft²	17.8
Wholly owned and Consolidated properties | Multifamily
Real Estate Properties [Line Items]
Number of multifamily apartment units | unit	4,287
Unconsolidated Fund properties | Office
Real Estate Properties [Line Items]
Area of real estate portfolio (sq ft) | ft²	0.4
Subsidiaries
Real Estate Properties [Line Items]
Consolidated debt	$ 3,187,512	$ 3,113,264
Consolidated entities
Real Estate Properties [Line Items]
Consolidated assets	9,250,000
Consolidated investment in real estate	8,860,000
Consolidated liabilities	5,250,000
Consolidated liabilities related to debt	4,740,000
Consolidated equity	4,000,000
Consolidated equity related to noncontrolling interest	$ 1,560,000

Overview - Schedule of Properti

Overview - Schedule of Properties Portfolio (Details) - property	Dec. 31, 2020	Nov. 20, 2019
Real Estate Properties [Line Items]
Number of properties	83
Office
Real Estate Properties [Line Items]
Number of properties	71
Office | Wholly-owned properties
Real Estate Properties [Line Items]
Number of properties	53
Office | Consolidated JV properties
Real Estate Properties [Line Items]
Number of properties	16
Office | Unconsolidated Fund properties
Real Estate Properties [Line Items]
Number of properties	2	8
Multifamily
Real Estate Properties [Line Items]
Number of properties	12
Multifamily | Wholly-owned properties
Real Estate Properties [Line Items]
Number of properties	11
Multifamily | Consolidated JV properties
Real Estate Properties [Line Items]
Number of properties	1
Consolidated Portfolio
Real Estate Properties [Line Items]
Number of properties	81
Consolidated Portfolio | Office
Real Estate Properties [Line Items]
Number of properties	69
Consolidated Portfolio | Office | Wholly-owned properties
Real Estate Properties [Line Items]
Number of properties	53
Consolidated Portfolio | Office | Consolidated JV properties
Real Estate Properties [Line Items]
Number of properties	16
Consolidated Portfolio | Office | Unconsolidated Fund properties
Real Estate Properties [Line Items]
Number of properties	0
Consolidated Portfolio | Multifamily
Real Estate Properties [Line Items]
Number of properties	12
Consolidated Portfolio | Multifamily | Wholly-owned properties
Real Estate Properties [Line Items]
Number of properties	11
Consolidated Portfolio | Multifamily | Consolidated JV properties
Real Estate Properties [Line Items]
Number of properties	1

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Narrative (Details)	Jan. 01, 2019USD ($)	Dec. 31, 2020USD ($)ft²segmentapartment	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Real Estate Properties [Line Items]
Development costs capitalized		$ 186,400,000	$ 75,300,000	$ 78,700,000
Interest costs capitalized		4,800,000	3,800,000	3,500,000
Ground lease liability		10,871,000	10,882,000
Above-market ground lease intangible liability offset against right-of-use asset - Adoption of ASU 2016-02		0	3,408,000	0
Ground lease right-of-use asset		7,472,000	7,479,000
Total basis difference		29,600,000	27,800,000
Impairment of long-lived assets		$ 0	0	0
Square footage being converted (sq ft) | ft²		490,000
Number of apartments under construction | apartment		500
Straight-line rent recognized		$ (18,733,000)	10,134,000	18,813,000
Lease termination revenue		1,000,000	500,000	1,600,000
Revenues		891,523,000	936,682,000	881,316,000
Charge for uncollectible amounts		41,000,000	2,600,000
Parking revenue		76,100,000	108,700,000	102,500,000
Parking receivables		600,000	1,300,000
Proceeds from sale of insurance investments		3,900,000
Gain from insurance recoveries		$ 13,100,000
Number of reportable business segments | segment		2
Tenant Receivables
Real Estate Properties [Line Items]
Increase (decrease) in net income from change in receivable allowance				(2,200,000)
Deferred Rent Receivables
Real Estate Properties [Line Items]
Increase (decrease) in net income from change in receivable allowance				600,000
ASU 2016-02
Real Estate Properties [Line Items]
Ground lease liability	$ 10,900,000
Above-market ground lease intangible liability offset against right-of-use asset - Adoption of ASU 2016-02	3,400,000
Ground lease right-of-use asset	$ 7,500,000
Buildings
Real Estate Properties [Line Items]
Estimated useful life (in years)		40 years
Site Improvements
Real Estate Properties [Line Items]
Estimated useful life (in years)		15 years
Rental revenue - tenant improvements
Real Estate Properties [Line Items]
Revenues		$ 5,900,000	$ 5,800,000	$ 3,500,000

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Tenant Receivables and Deferred Rent Receivables (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Tenant Receivables
Allowances and Security Obtained from Tenant [Line Items]
Increase (decrease) in net income from change in receivable allowance	$ (2.2)
Deferred Rent Receivables
Allowances and Security Obtained from Tenant [Line Items]
Increase (decrease) in net income from change in receivable allowance	$ 0.6

Investment in Real Estate (Deta

Investment in Real Estate (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Asset Acquisitions [Abstract]
Land	$ 1,150,821	$ 1,152,684
Buildings and improvements	9,344,653	9,308,481
Tenant improvements and lease intangibles	928,867	905,753
Property under development	254,297	111,715
Investment in real estate, gross	$ 11,678,638	$ 11,478,633

Investment in Real Estate - Nar

Investment in Real Estate - Narrative (Details) shares in Thousands, $ in Thousands	Nov. 21, 2019USD ($)ft²propertyinstitutional_investorshares	Jun. 28, 2019	Nov. 20, 2019	Dec. 31, 2020USD ($)ft²property	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Schedule Of Asset Acquisitions [Line Items]
Square footage (sq ft) | ft²				80,000
Property contract price				$ 21,000
Gain (loss) on disposition of proved property				$ 6,400
Capital interest				67.00%
Gain on initial consolidation of joint venture				$ 0	$ 307,938	$ 0
Number of properties | property				83
Consolidated Joint Venture
Schedule Of Asset Acquisitions [Line Items]
Capital interest in consolidated JV (percent)		20.00%
Consolidated JV from Fund X
Schedule Of Asset Acquisitions [Line Items]
Non-controlling interest related to joint venture	$ 61,400
Gain on initial consolidation of joint venture	$ 307,900
Fund X
Schedule Of Asset Acquisitions [Line Items]
Purchase of equity interest (percent)	16.30%		1.40%			1.90%
Cash consideration in acquisition of equity interest	$ 76,900
OP units issued in acquisition of equity interest (in shares) | shares	332
OP units issued in acquisition of equity interest	$ 14,400
Equity interest in fund (percent)	89.00%		72.70%			71.30%
Number of institutional investors | institutional_investor	1
Partnership X
Schedule Of Asset Acquisitions [Line Items]
Purchase of equity interest (percent)	1.50%		3.90%	3.60%
Equity interest in fund (percent)			28.40%		29.90%	24.50%
Office
Schedule Of Asset Acquisitions [Line Items]
Number of properties | property				71
Consolidated JV from Fund X | Partnership X
Schedule Of Asset Acquisitions [Line Items]
Equity interest in fund (percent)	9.40%
Consolidated JV from Fund X | Office
Schedule Of Asset Acquisitions [Line Items]
Square footage (sq ft) | ft²	1,500,000
Number of properties | property	6
Partnership X | Office
Schedule Of Asset Acquisitions [Line Items]
Square footage (sq ft) | ft²	386,000
Number of properties | property	2

Investment in Real Estate - Acq

Investment in Real Estate - Acquisitions (Details) $ in Thousands	Nov. 21, 2019USD ($)ft²	Jun. 07, 2019USD ($)ft²unit	Dec. 31, 2020ft²
Schedule Of Asset Acquisitions [Line Items]
Contract price		$ 365,100
Square footage (sq ft) | ft²			80,000
The Glendon
Schedule Of Asset Acquisitions [Line Items]
Contract price		$ 365,100
Number of multifamily units | unit		350
Square footage (sq ft) | ft²		50,000
Investment In Real Estate [Abstract]
Tenant improvements and lease intangibles		$ 2,301
Acquired above- and below-market leases, net		(2,114)
Net assets and liabilities acquired		366,584
The Glendon | Land
Investment In Real Estate [Abstract]
Land, Building and improvements		32,773
The Glendon | Building and improvements
Investment In Real Estate [Abstract]
Land, Building and improvements		$ 333,624
Joint Venture Consolidation
Schedule Of Asset Acquisitions [Line Items]
Square footage (sq ft) | ft²	1,454,000
Investment In Real Estate [Abstract]
Tenant improvements and lease intangibles	$ 40,890
Acquired above- and below-market leases, net	(14,198)
JV interest in unconsolidated Fund	28,783
Assumed debt	(403,016)
Assumed interest rate swaps	(4,147)
Other assets and liabilities, net	26,256
Net assets and liabilities acquired	558,256
Joint Venture Consolidation | Land
Investment In Real Estate [Abstract]
Land, Building and improvements	52,272
Joint Venture Consolidation | Building and improvements
Investment In Real Estate [Abstract]
Land, Building and improvements	$ 831,416

Ground Lease - Narrative (Detai

Ground Lease - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee Disclosure [Abstract]
Fixed rent payments due per year on ground lease	$ 733
Ground lease right-of-use asset	7,472	$ 7,479
Ground lease liability	10,871	10,882
Ground rent expense	$ 733	$ 733	$ 733

Ground Lease - Summary of Groun

Ground Lease - Summary of Ground Lease Payments (Details) $ in Thousands	Dec. 31, 2020USD ($)
Future Minimum Ground Lease Payments
2021	$ 733
2022	733
2023	733
2024	733
2025	733
Thereafter	44,712
Total future minimum lease payments	$ 48,377

Acquired Lease Intangibles - Su

Acquired Lease Intangibles - Summary of Acquired Lease Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, net	$ 5,141	$ 6,407
Acquired lease intangible liabilities, net	35,223	52,367
Above-Market Tenant Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, gross	6,848	7,220
Accumulated amortization	(2,618)	(1,741)
Above-Market Ground Lease
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, gross	1,152	1,152
Accumulated amortization	(241)	(224)
Below-Market Tenant Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible liabilities, gross	81,934	102,583
Accumulated accretion	$ (46,711)	$ (50,216)

Acquired Lease Intangibles - Im

Acquired Lease Intangibles - Impact on Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	$ 15,878	$ 16,264	$ 22,025
Rental Revenue | Tenant Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	15,895	16,282	21,992
Office Parking and Other Income | Above-Market Ground Lease
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	(17)	(18)	(17)
Office Expense | Above-Market Ground Lease
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	$ 0	$ 0	$ 50

Acquired Lease Intangibles - Es

Acquired Lease Intangibles - Estimated Future Net Accretion (Details) $ in Thousands	Dec. 31, 2020USD ($)
Estimated Future Net Accretion [Abstract]
2021	$ 9,125
2022	6,482
2023	4,512
2024	3,665
2025	2,975
Thereafter	3,323
Total	$ 30,082

Investments in Unconsolidated_3

Investments in Unconsolidated Funds - Narrative (Details) ft² in Millions	Nov. 21, 2019	Nov. 20, 2019ft²propertyfund	Nov. 20, 2019ft²property	Dec. 31, 2020ft²apartmentproperty	Dec. 31, 2018	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Number of office properties | property				83
Area of real estate portfolio (sq ft) | ft²		1.8	1.8
Amounts related to the Fund (percent)				100.00%
Opportunity Fund
Schedule of Equity Method Investments [Line Items]
Equity interest in fund (percent)		6.20%	6.20%		6.20%
Fund X
Schedule of Equity Method Investments [Line Items]
Equity interest in fund (percent)	89.00%	72.70%	72.70%		71.30%
Purchase of equity interest (percent)	16.30%		1.40%		1.90%
Partnership X
Schedule of Equity Method Investments [Line Items]
Equity interest in fund (percent)		28.40%	28.40%		24.50%	29.90%
Area of real estate portfolio (sq ft) | ft²				6.6
Purchase of equity interest (percent)	1.50%		3.90%	3.60%
Unconsolidated Fund properties
Schedule of Equity Method Investments [Line Items]
Equity interest in fund (percent)				33.50%
Number of real estate funds owned and managed | fund		3
Office
Schedule of Equity Method Investments [Line Items]
Number of office properties | property				71
Office | Unconsolidated Fund properties
Schedule of Equity Method Investments [Line Items]
Number of office properties | property		8	8	2
Area of real estate portfolio (sq ft) | ft²				0.4
Office | Unconsolidated Fund properties | Partnership X
Schedule of Equity Method Investments [Line Items]
Number of office properties | apartment				2

Investments in Unconsolidated_4

Investments in Unconsolidated Funds - Summary of Cash Distributions Received from Funds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Real Estate Investments, Net [Abstract]
Operating distributions received	$ 394	$ 6,820	$ 6,400
Capital distributions received	1,236	5,853	7,349
Total distributions received	$ 1,630	$ 12,673	$ 13,749

Investments in Unconsolidated_5

Investments in Unconsolidated Funds - Summary of Statement of Financial Position Information for Funds (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Consolidated assets	$ 9,250,825	$ 9,349,301
Consolidated liabilities	5,254,806	4,978,367
Total equity	2,437,091	2,712,072
Unconsolidated Funds
Schedule of Equity Method Investments [Line Items]
Consolidated assets	133,617	136,479
Consolidated liabilities	112,706	113,330
Total equity	$ 20,911	$ 23,149

Investments in Unconsolidated_6

Investments in Unconsolidated Funds - Summary of Statement of Operations Information for Funds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Revenues	$ 891,523	$ 936,682	$ 881,316
Net income attributable to common stockholders	50,421	363,713	116,086
Unconsolidated Funds
Schedule of Equity Method Investments [Line Items]
Revenues	15,744	75,952	79,590
Operating income	3,614	22,269	22,959
Net income attributable to common stockholders	$ 887	$ 7,350	$ 6,260

Other Assets - Summary of Other

Other Assets - Summary of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Assets [Abstract]
Restricted cash	$ 132	$ 121	$ 121
Prepaid expenses	13,774	8,711
Other indefinite-lived intangibles	1,988	1,988
Furniture, fixtures and equipment, net	2,358	2,368
Other	3,331	3,233
Total other assets	$ 21,583	$ 16,421

Secured Notes Payable and Rev_3

Secured Notes Payable and Revolving Credit Facility, Net - Summary (Details)	12 Months Ended
	Dec. 31, 2020USD ($)apartment	Jul. 01, 2022	Jul. 01, 2021	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Principal balance	$ 4,777,512,000			$ 4,653,264,000
Unamortized loan premium, net	4,467,000			6,741,000
Unamortized deferred loan costs, net	(37,012,000)			(40,947,000)
Total Consolidated Debt, net	$ 4,744,967,000			4,619,058,000
Minimum number of collateral pools used to secure loans | apartment	1
Accumulated amortization loan premium	$ 2,700,000			500,000
Accumulated amortization on deferred loan costs	$ 38,300,000			30,700,000
Secured Debt | LIBOR | Minimum
Debt Instrument [Line Items]
Variable Interest Rate	0.00%
Secured Debt | Term Loan at 4.55% Jun 01 2038
Debt Instrument [Line Items]
Principal amortization period (in years)	30 years
Wholly-Owned Subsidiaries
Debt Instrument [Line Items]
Principal balance	$ 3,187,512,000			3,113,264,000
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 3.46% Jan 01 2024
Debt Instrument [Line Items]
Maturity date	Jan. 1, 2024
Principal balance	$ 300,000,000			300,000,000
Fixed interest rate	3.46%
Swap Maturity Date	Jan. 1, 2022
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 3.46% Jan 01 2024 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.55%
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 3.84% Mar 03 2025
Debt Instrument [Line Items]
Maturity date	Mar. 3, 2025
Principal balance	$ 335,000,000			335,000,000
Fixed interest rate	3.84%
Swap Maturity Date	Mar. 1, 2023
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 3.84% Mar 03 2025 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.30%
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 2.76% Apr 01 2025
Debt Instrument [Line Items]
Maturity date	Apr. 1, 2025
Principal balance	$ 102,400,000			102,400,000
Fixed interest rate	2.76%
Swap Maturity Date	Mar. 1, 2023
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 2.76% Apr 01 2025 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.25%
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 3.07% Aug 15 2026
Debt Instrument [Line Items]
Maturity date	Aug. 15, 2026
Principal balance	$ 415,000,000			415,000,000
Fixed interest rate	3.07%
Swap Maturity Date	Aug. 1, 2025
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 3.07% Aug 15 2026 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.10%
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.44% Sep 19 2026
Debt Instrument [Line Items]
Maturity date	Sep. 19, 2026
Principal balance	$ 400,000,000			400,000,000
Fixed interest rate	2.44%
Swap Maturity Date	Sep. 1, 2024
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.44% Sep 19 2026 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.15%
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.36% Sep 26 2026
Debt Instrument [Line Items]
Maturity date	Sep. 26, 2026
Principal balance	$ 200,000,000			200,000,000
Fixed interest rate	2.36%
Swap Maturity Date	Oct. 1, 2024
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.36% Sep 26 2026 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.20%
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.18% Nov 01 2026
Debt Instrument [Line Items]
Maturity date	Nov. 1, 2026
Principal balance	$ 400,000,000			400,000,000
Fixed interest rate	2.18%
Swap Maturity Date	Oct. 1, 2024
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.18% Nov 01 2026 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.15%
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 3.16% Jun 01 2027
Debt Instrument [Line Items]
Maturity date	Jun. 1, 2027
Principal balance	$ 550,000,000			550,000,000
Fixed interest rate	3.16%
Swap Maturity Date	Jun. 1, 2022
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 3.16% Jun 01 2027 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.37%
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 3.26% Jun 01 2029
Debt Instrument [Line Items]
Maturity date	Jun. 1, 2029
Principal balance	$ 255,000,000			255,000,000
Fixed interest rate	3.26%
Swap Maturity Date	Jun. 1, 2027
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 3.26% Jun 01 2029 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	0.98%
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 3.25% Jun 01 2029
Debt Instrument [Line Items]
Maturity date	Jun. 1, 2029
Principal balance	$ 125,000,000			125,000,000
Fixed interest rate	3.25%
Swap Maturity Date	Jun. 1, 2027
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 3.25% Jun 01 2029 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	0.98%
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 4.55% Jun 01 2038
Debt Instrument [Line Items]
Maturity date	Jun. 1, 2038
Principal balance	$ 30,112,000			30,864,000
Fixed interest rate	4.55%
Wholly-Owned Subsidiaries | Line of Credit | Revolving Credit Facility with Maturity Aug 21 2023
Debt Instrument [Line Items]
Maturity date	Aug. 21, 2023
Principal balance	$ 75,000,000			0
Maximum borrowing capacity	$ 400,000,000
Wholly-Owned Subsidiaries | Line of Credit | Revolving Credit Facility with Maturity Aug 21 2023 | Minimum
Debt Instrument [Line Items]
Unused commitment fees (percent)	0.10%
Wholly-Owned Subsidiaries | Line of Credit | Revolving Credit Facility with Maturity Aug 21 2023 | Maximum
Debt Instrument [Line Items]
Unused commitment fees (percent)	0.15%
Wholly-Owned Subsidiaries | Line of Credit | Revolving Credit Facility with Maturity Aug 21 2023 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.15%
Consolidated JV | Secured Debt
Debt Instrument [Line Items]
Principal balance				400,000,000
Consolidated JV | Secured Debt | Term Loan at 2.37% Feb 28 2023
Debt Instrument [Line Items]
Maturity date	Feb. 28, 2023
Principal balance	$ 580,000,000			580,000,000
Fixed interest rate	2.37%
Swap Maturity Date	Mar. 1, 2021
Consolidated JV | Secured Debt | Term Loan at 2.37% Feb 28 2023 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.40%
Consolidated JV | Secured Debt | Term Loan at 3.47% Dec 19 2024
Debt Instrument [Line Items]
Maturity date	Dec. 19, 2024
Principal balance	$ 400,000,000			400,000,000
Fixed interest rate	3.47%
Swap Maturity Date	Jan. 1, 2023
Consolidated JV | Secured Debt | Term Loan at 3.47% Dec 19 2024 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.30%
Consolidated JV | Secured Debt | Term Loan at 3.04% May 15 2027
Debt Instrument [Line Items]
Maturity date	May 15, 2027
Principal balance	$ 450,000,000			0
Fixed interest rate	3.04%
Swap Maturity Date	Apr. 1, 2025
Consolidated JV | Secured Debt | Term Loan at 3.04% May 15 2027 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.35%
Consolidated JV | Secured Debt | Term Loan at 3.25% Jun 01 2029
Debt Instrument [Line Items]
Maturity date	Jun. 1, 2029
Principal balance	$ 160,000,000			$ 160,000,000
Fixed interest rate	3.25%
Swap Maturity Date	Jul. 1, 2027
Consolidated JV | Secured Debt | Term Loan at 3.25% Jun 01 2029 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	0.98%
Forecast | Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.18% Nov 01 2026
Debt Instrument [Line Items]
Fixed interest rate			2.31%
Forecast | Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 3.04% May 15 2027
Debt Instrument [Line Items]
Fixed interest rate		2.26%

Secured Notes Payable and Rev_4

Secured Notes Payable and Revolving Credit Facility, Net - Debt Statistics (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Principal balance of consolidated fixed rate debt	$ 4,700,000
Weighted average remaining life (including extension options) of consolidated fixed rate debt (in years)	5 years 3 months 18 days
Weighted average remaining fixed interest period of consolidated fixed rate debt (in years)	3 years 1 month 6 days
Weighted average annual interest rate of consolidated fixed rate debt (percent)	3.02%
Debt Instrument [Line Items]
Principal balance	$ 4,777,512	$ 4,653,264
Aggregate swapped to fixed rate loans
Debt Instrument [Line Items]
Principal balance	4,672,400	4,622,400
Aggregate fixed rate loans
Debt Instrument [Line Items]
Principal balance	30,112	30,864
Aggregate floating rate loans
Debt Instrument [Line Items]
Principal balance	$ 75,000	$ 0

Secured Notes Payable and Rev_5

Secured Notes Payable and Revolving Credit Facility, Net - Minimum Future Principal Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Minimum Future Principal Payments Due
2021	$ 787
2022	823
2023	655,862
2024	700,902
2025	438,343
Thereafter	2,980,795
Total future principal payments	$ 4,777,512	$ 4,653,264

Secured Notes Payable and Rev_6

Secured Notes Payable and Revolving Credit Facility, Net - Loan Costs and Accumulated Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loan Costs Included in Interest Expense
Loan premium amortized and written off	$ (2,274)	$ (261)	$ (205)
Interest Expense
Loan Costs Included in Interest Expense
Loan premium amortized and written off	(2,274)	(261)	(205)
Deferred loan costs amortized and written off	7,832	14,314	8,234
Loan costs expensed	1,008	1,318	58
Total	$ 6,566	$ 15,371	$ 8,087

Interest Payable, Accounts Pa_3

Interest Payable, Accounts Payable and Deferred Revenue - Summary of Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounts Payable and Accrued Liabilities [Abstract]
Interest payable	$ 12,199	$ 11,707
Accounts payable and accrued liabilities	81,595	66,437
Deferred revenue	50,550	53,266
Total interest payable, accounts payable and deferred revenue	$ 144,344	$ 131,410

Derivative Contracts - Summary

Derivative Contracts - Summary of Derivatives (Details) - Interest Rate Swap - Derivatives Designated as Cash Flow Hedges - Cash Flow Hedging	Dec. 31, 2020USD ($)instrument
Derivative [Line Items]
Number of Interest Rate Swaps | instrument	39
Notional	$ 5,117,400,000
Unconsolidated Fund
Derivative [Line Items]
Number of Interest Rate Swaps | instrument	1
Notional	$ 110,000,000
Percent of notional amount related to the Fund	100.00%
Forward Contracts
Derivative [Line Items]
Notional	$ 400,000,000
Interest Rate Swap, Accreting Principal
Derivative [Line Items]
Number of Interest Rate Swaps | instrument	5
Notional	$ 135,000,000
Future notional	$ 1,080,000,000
Forward Swap, Accreting Principal
Derivative [Line Items]
Number of Interest Rate Swaps | instrument	2

Derivative Contracts - Credit-r

Derivative Contracts - Credit-risk related Contingent Features (Details) - Interest Rate Swap - Derivatives Designated as Cash Flow Hedges - Cash Flow Hedging - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Fair value derivatives in a net liability position	$ 225,166	$ 56,896
Unconsolidated Fund
Derivative Instruments, Gain (Loss) [Line Items]
Fair value derivatives in a net liability position	$ 208	$ 0
Percent of notional amount related to the Fund	100.00%

Derivative Contracts - Counterp

Derivative Contracts - Counterparty Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivatives in an asset position	$ 0	$ 22,381
Interest Rate Swap | Derivatives Designated as Cash Flow Hedges | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivatives in an asset position	0	23,275
Interest Rate Swap | Derivatives Designated as Cash Flow Hedges | Cash Flow Hedging | Unconsolidated Fund
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivatives in an asset position	$ 0	$ 963
Percent of notional amount related to the Fund	100.00%

Derivative Contracts - Impact o

Derivative Contracts - Impact of Hedges on AOCI and Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Gain recorded in AOCI - Adoption of ASU 2017-12	$ 0	$ 0	$ 211
(Loss) gain recorded in AOCI	(232,652)	(76,273)	22,723
Interest expense	(142,872)	(143,308)	(133,402)
Income from unconsolidated Funds	430	6,923	6,400
Unconsolidated Fund
Derivative [Line Items]
(Loss) gain recorded in AOCI	(410)	(5,023)	3,052
Cash Flow Hedging | Derivatives Designated as Cash Flow Hedges
Derivative [Line Items]
Gain recorded in AOCI - Adoption of ASU 2017-12	0	0	211
(Loss) gain recorded in AOCI	(232,652)	(76,273)	22,723
(Gain) loss reclassified from AOCI	49,435	(24,298)	(10,103)
Cash Flow Hedging | Derivatives Designated as Cash Flow Hedges | Unconsolidated Fund
Derivative [Line Items]
(Loss) gain recorded in AOCI	(410)	(5,023)	3,052
(Gain) loss reclassified from AOCI	$ 106	$ (1,698)	$ (813)

Derivative Contracts - Future R

Derivative Contracts - Future Reclassifications from AOCI (Details) $ in Thousands	Dec. 31, 2020USD ($)
Derivative [Line Items]
Derivative gains (losses) to be reclassified during next year	$ (72,495)
Unconsolidated Fund
Derivative [Line Items]
Derivative gains (losses) to be reclassified during next year	$ (46)

Equity - Narrative (Details)

Equity - Narrative (Details) - USD ($)	Nov. 21, 2019	Jun. 28, 2019	Jun. 07, 2019	Nov. 20, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Number of OP units converted to shares of common stock (in shares)					94,000	222,000	629,000
Number of OP units redeemed (in shares)					150	19,000	3,000
OP Units redeemed with cash					$ 7,000	$ 734,000	$ 108,000
Shares issued under ATM program (shares)						4,900,000
Net proceeds from issuance of common stock						$ 201,000,000
Contact price for purchased property			$ 365,100,000
Capital contribution to consolidated JV			44,000,000
Noncontrolling interests contributions to consolidated JV			176,000,000
Shares of common stock issued for exercise of stock options (in shares)							21,000
Number of stock options exercised (in shares)							49,000
Common stock, outstanding (in shares)					175,463,887	175,369,746
Number of shares of common stock issued upon redemption of one OP Unit (in shares)					1
OP unit conversion rate					1
Consolidated Joint Venture
Schedule of Equity Method Investments [Line Items]
Capital interest in consolidated JV (percent)		20.00%
Operating Partnership
Schedule of Equity Method Investments [Line Items]
Investors' ownership in joint venture (percent)					14.60%
Noncontrolling interests units ownership in Operating Partnership (in units)					30,100,000
Secured Debt | Term Loan with maturity in June 2029
Schedule of Equity Method Investments [Line Items]
Debt instrument face amount			$ 160,000,000
Fund X
Schedule of Equity Method Investments [Line Items]
Purchase of equity interest (percent)	16.30%			1.40%			1.90%
Cash consideration in acquisition of equity interest	$ 76,900,000
OP units issued in acquisition of equity interest (in shares)	332,000
OP units issued in acquisition of equity interest	$ 14,400,000
Equity interest in fund (percent)	89.00%			72.70%			71.30%

Equity - Net Income Attributabl

Equity - Net Income Attributable to Common Stockholders and Transfers (to) from Noncontrolling Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stockholders' Equity Note [Abstract]
Net income attributable to common stockholders	$ 50,421	$ 363,713	$ 116,086
Transfers from noncontrolling interests:
Exchange of OP Units with noncontrolling interests	1,535	3,540	10,292
Repurchase of OP Units from noncontrolling interests	(4)	(431)	(59)
Net transfers from noncontrolling interests	1,531	3,109	10,233
Change from net income attributable to common stockholders and transfers from noncontrolling interests	$ 51,952	$ 366,822	$ 126,319

Equity - Accumulated Other Comp

Equity - Accumulated Other Comprehensive Income Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 4,370,934	$ 3,848,430	$ 3,902,049
Other comprehensive (loss) gain before reclassifications	(232,652)	(76,273)	22,723
Reclassification of loss (gain) from AOCI to Interest Expense	49,435	(24,298)	(10,103)
Net current period OCI	(183,521)	(107,292)	15,070
OCI attributable to noncontrolling interests	52,948	35,886	(4,225)
OCI attributable to common stockholders	(130,573)	(71,406)	10,845
Ending balance	3,996,019	4,370,934	3,848,430
Cumulative Effect, Period of Adoption, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	0	0	211
Ending balance		0	0
Unconsolidated Fund
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive (loss) gain before reclassifications	(410)	(5,023)	3,052
Reclassification of loss (gain) from AOCI to Interest Expense	106	(1,698)	(813)
AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(17,462)	53,944	43,099
Ending balance	$ (148,035)	$ (17,462)	$ 53,944

Equity - Dividends (Details)

Equity - Dividends (Details) - $ / shares	3 Months Ended				12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2020
Dividends, Common Stock [Abstract]
Record Date	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Paid Date	Oct. 15, 2020	Jul. 15, 2020	Apr. 15, 2020	Jan. 15, 2020
Dividend Per Share (usd per share)	$ 0.28	$ 0.28	$ 0.28	$ 0.28	$ 1.12
Ordinary Income (percent)	49.80%	49.80%	49.80%	49.80%	49.80%
Capital Gain (percent)	0.00%	0.00%	0.00%	0.00%	0.00%
Return of Capital (percent)	50.20%	50.20%	50.20%	50.20%	50.20%
Section 199A Dividend (percent)	49.80%	49.80%	49.80%	49.80%	49.80%

EPS - Summary of EPS Calculatio

EPS - Summary of EPS Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net income attributable to common stockholders	$ 50,421	$ 363,713	$ 116,086
Allocation to participating securities: Unvested LTIP Units	(830)	(1,594)	(546)
Net income attributable to common stockholders - basic and diluted	$ 49,591	$ 362,119	$ 115,540
Weighted average shares of common stock outstanding - basic (in shares)	175,380,000	173,358,000	169,893,000
Effect of dilutive securities: Stock options (in shares)	0	0	9,000
Weighted average shares of common stock and common stock equivalents outstanding - diluted (in shares)	175,380,000	173,358,000	169,902,000
Basic EPS:
Net income attributable to common stockholders per share – basic (usd per share)	$ 0.28	$ 2.09	$ 0.68
Diluted EPS:
Net income attributable to common stockholders per share – diluted (usd per share)	$ 0.28	$ 2.09	$ 0.68
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares of common stock issued upon exchange of one OP unit or one vested LTIP unit (in shares)	1
OP Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of weighted average diluted shares (in shares)	28,288,000	26,465,000	26,661,000
Vested LTIP Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of weighted average diluted shares (in shares)	815,000	1,652,000	813,000

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)installmentshares	Dec. 31, 2019shares	Dec. 31, 2018shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock future issuance (in shares)	9,500,000
Shares available for grant (in shares)	9,100,000
Number of full value shares counted against overall limits of the stock incentive plan (in shares)	2
Number of shares counted against overall limits of the stock incentive plan, vesting in over five years (in shares)	1
OP unit conversion rate	1
Awards granted to key employees (in shares)	1,100,000	802,000	898,000
Unrecognized compensation cost related to nonvested options and LTIP unit awards | $	$ 19.3
Unrecognized compensation cost related to nonvested options and LTIP unit awards, recognition period	2 years
Non-employee director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-employee director awards granted in lieu of cash compensation (in shares)	55,000	38,000	37,000
LTIP Units | Various employees | Vesting tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of annual vesting installments | installment	3
LTIP Units | Various employees | Vesting tranche two | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
LTIP Units | Various employees | Vesting tranche two | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years

Stock-Based Compensation - Comp

Stock-Based Compensation - Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement [Abstract]
Stock-based compensation expense, net	$ 21,365	$ 18,359	$ 22,299
Capitalized stock-based compensation	5,448	4,698	5,006
Intrinsic value of options exercised	$ 0	$ 0	$ 1,196

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Stock Options
Outstanding, beginning balance (in shares)		0	49
Exercised (in shares)			(49)
Outstanding, ending balance (in shares)			0	49
Weighted Average Exercise Price
Outstanding, beginning balance (usd per share)		$ 0	$ 12.66
Exercised (usd per share)			12.66
Outstanding, ending balance (usd per share)			$ 0	$ 12.66
Weighted Average Remaining Contract Life, Outstanding			0 years	16 months
Total Intrinsic Value, Outstanding			$ 0	$ 1,375
Intrinsic value of options exercised	$ 0	$ 0	$ 1,196

Stock-Based Compensation - Unve

Stock-Based Compensation - Unvested LTIP Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of Units
Outstanding, beginning balance (in shares)	924	945	1,056
Granted (in shares)	1,190	840	935
Vested (in shares)	(1,073)	(826)	(1,036)
Forfeited (in shares)	(57)	(35)	(10)
Outstanding, ending balance (in shares)	984	924	945
Weighted Average Grant Date Fair Value
Outstanding, beginning balance (usd per share)	$ 30.48	$ 28.20	$ 26.98
Granted (usd per share)	21.12	31.92	27.01
Vested (usd per share)	24.58	29.13	25.82
Forfeited (usd per share)	28.20	35.41	34.18
Outstanding, ending balance (usd per share)	$ 25.71	$ 30.48	$ 28.20
Grant Date Fair Value, Granted	$ 25,175	$ 26,821	$ 25,247
Grant Date Fair Value, Vested	26,369	24,061	26,740
Grant Date Fair Value, Forfeited	$ 1,623	$ 1,234	$ 333

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Estimated Fair Value of Secured Notes Payable (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ground lease liability	$ 10,871	$ 10,882
Fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured notes payable	4,719,462	4,682,305
Ground lease liability	11,865	12,218
Carrying value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured notes payable	4,706,979	4,660,005
Ground lease liability	$ 10,871	$ 10,882

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Financial Instruments Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative Assets:
Fair value - derivatives	$ 0	$ 22,381
Derivative Liabilities:
Fair value - derivatives	$ 214,016	54,616
Fund X | Interest Rate Swap
Derivative Liabilities:
Percent of notional amount related to the Fund	100.00%
Level 2
Derivative Assets:
Fair value - derivatives	$ 0	22,381
Derivative Liabilities:
Fair value - derivatives	214,016	54,616
Level 2 | Fund X
Derivative Assets:
Fair value - unconsolidated Funds' derivatives	0	889
Derivative Liabilities:
Fair value - unconsolidated Funds' derivatives	$ 137	$ 0

Segment Reporting - Narrative (

Segment Reporting - Narrative (Details)	12 Months Ended
	Dec. 31, 2020segment
Segment Reporting [Abstract]
Number of reportable business segments	2

Segment Reporting - Operating A

Segment Reporting - Operating Activity Within Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 891,523	$ 936,682	$ 881,316
Office Segment
Segment Reporting Information [Line Items]
Total revenue	771,169	816,755	777,931
Operating expenses	(268,259)	(264,482)	(252,751)
Multifamily Segment
Segment Reporting Information [Line Items]
Total revenue	120,354	119,927	103,385
Operating expenses	(37,154)	(33,681)	(28,116)
Reportable Segments
Segment Reporting Information [Line Items]
Total segment profit	586,110	638,519	600,449
Reportable Segments | Office Segment
Segment Reporting Information [Line Items]
Total revenue	771,169	816,755	777,931
Operating expenses	(268,259)	(264,482)	(252,751)
Total segment profit	502,910	552,273	525,180
Reportable Segments | Multifamily Segment
Segment Reporting Information [Line Items]
Total revenue	120,354	119,927	103,385
Operating expenses	(37,154)	(33,681)	(28,116)
Total segment profit	$ 83,200	$ 86,246	$ 75,269

Segment Reporting - Reconciliat

Segment Reporting - Reconciliation of Segment Profit to Net Income Attributable to Common Stockholders (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation from segment profit to net income
General and administrative expenses	$ (39,601)	$ (38,068)	$ (38,641)
Depreciation and amortization	(385,248)	(357,743)	(309,864)
Other income	16,288	11,653	11,414
Other expenses	(2,947)	(7,216)	(7,744)
Income from unconsolidated Funds	430	6,923	6,400
Interest expense	(142,872)	(143,308)	(133,402)
Gain on sale of investment in real estate	6,393	0	0
Gain from consolidation of JV	0	307,938	0
Net income	38,553	418,698	128,612
Less: Net loss (income) attributable to noncontrolling interests	11,868	(54,985)	(12,526)
Net income attributable to common stockholders	50,421	363,713	116,086
Reportable Segments
Reconciliation from segment profit to net income
Total profit from all segments	$ 586,110	$ 638,519	$ 600,449

Future Minimum Lease Rental R_3

Future Minimum Lease Rental Receipts - Narrative (Details)	12 Months Ended
	Dec. 31, 2020land_parcel
Lessor, Lease, Description [Line Items]
Maximum term of residential leases not included in total future minimum base rentals	1 year
Wholly-owned properties
Lessor, Lease, Description [Line Items]
Number of land parcels subject to ground lease	2

Future Minimum Lease Rental R_4

Future Minimum Lease Rental Receipts - Future Minimum Rental Receipts (Details) $ in Thousands	Dec. 31, 2020USD ($)
Future Minimum Base Rentals
2021	$ 635,956
2022	553,974
2023	452,930
2024	355,428
2025	266,182
Thereafter	629,410
Total future minimum base rentals	$ 2,893,880

Commitments, Contingencies an_3

Commitments, Contingencies and Guarantees - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)ft²buildingapartment
Other Commitments [Line Items]
Number of buildings containing asbestos | building	32
Number of apartments under construction	500
Retail square footage (sq ft) | ft²	80,000
Development Projects
Other Commitments [Line Items]
Aggregate remaining contractual commitment | $	$ 148.2
Development Projects | California
Other Commitments [Line Items]
Number of apartments under construction	376
Development Projects | Hawaii
Other Commitments [Line Items]
Retail square footage (sq ft) | ft²	490,000
Number of apartments under construction	500
Repositionings, Capital Expenditure Projects, And Tenant Improvements
Other Commitments [Line Items]
Aggregate remaining contractual commitment | $	$ 23.2

Commitments, Contingencies an_4

Commitments, Contingencies and Guarantees - Debt Related to Unconsolidated Funds (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)property	Dec. 31, 2019USD ($)
Guarantor Obligations [Line Items]
Amounts related to the Fund (percent)	100.00%
Principal balance	$ 4,777,512	$ 4,653,264
Unconsolidated Fund
Guarantor Obligations [Line Items]
Amounts related to the Fund (percent)	100.00%
Partnership X
Guarantor Obligations [Line Items]
Maximum future payments under swap agreement	$ 200
Partnership X | Floating rate term loan
Guarantor Obligations [Line Items]
Loan Maturity Date	Mar. 1, 2023
Principal balance	$ 110,000
Number of properties to secure loan | property	2
Assumed LIBOR rate to assess maximum future payments under swap agreement	0.00%
Loan agreement LIBOR floor	0.00%
Partnership X | Floating rate term loan | LIBOR
Guarantor Obligations [Line Items]
Variable Interest Rate	1.40%
Partnership X | Interest rate swap
Guarantor Obligations [Line Items]
Swap Fixed Interest Rate	2.30%
Swap Maturity Date	Mar. 1, 2021

Schedule III - Consolidated R_2

Schedule III - Consolidated Real Estate and Accumulated Depreciation and Amortization - By Property (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 4,777,512
Initial Cost
Land	889,684
Buildings & Improvements	6,593,840
Cost Capitalized Subsequent to Acquisition
Improvements	4,195,114
Gross Carrying Amount
Land	1,163,891
Building and Improvements	10,514,747
Total	11,678,638	$ 11,478,633	$ 10,030,708	$ 9,829,208
Accumulated Depreciation & Amortization	2,816,193	2,518,415	$ 2,246,887	$ 2,012,752
Principal balance	4,777,512	$ 4,653,264
Aggregate federal income tax cost basis for consolidated real estate	7,960,000
Line of Credit | Revolving Credit Facility With Maturity Date of August 21, 2020
Gross Carrying Amount
Principal balance	75,000
Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,777,512
Initial Cost
Land	876,614
Buildings & Improvements	6,593,840
Cost Capitalized Subsequent to Acquisition
Improvements	3,953,887
Gross Carrying Amount
Land	1,150,821
Building and Improvements	10,273,520
Total	11,424,341
Accumulated Depreciation & Amortization	2,816,193
Property Under Development
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	13,070
Buildings & Improvements	0
Cost Capitalized Subsequent to Acquisition
Improvements	241,227
Gross Carrying Amount
Land	13,070
Building and Improvements	241,227
Total	254,297
Accumulated Depreciation & Amortization	0
100 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	252,033
Initial Cost
Land	12,769
Buildings & Improvements	78,447
Cost Capitalized Subsequent to Acquisition
Improvements	152,439
Gross Carrying Amount
Land	27,108
Building and Improvements	216,547
Total	243,655
Accumulated Depreciation & Amortization	78,996
233 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	62,961
Initial Cost
Land	9,263
Buildings & Improvements	130,426
Cost Capitalized Subsequent to Acquisition
Improvements	3,572
Gross Carrying Amount
Land	9,263
Building and Improvements	133,998
Total	143,261
Accumulated Depreciation & Amortization	18,080
401 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	9,989
Buildings & Improvements	29,187
Cost Capitalized Subsequent to Acquisition
Improvements	133,958
Gross Carrying Amount
Land	21,787
Building and Improvements	151,347
Total	173,134
Accumulated Depreciation & Amortization	52,475
429 Santa Monica | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	33,691
Initial Cost
Land	4,949
Buildings & Improvements	72,534
Cost Capitalized Subsequent to Acquisition
Improvements	2,994
Gross Carrying Amount
Land	4,949
Building and Improvements	75,528
Total	80,477
Accumulated Depreciation & Amortization	9,421
1132 Bishop Place | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	8,317
Buildings & Improvements	105,651
Cost Capitalized Subsequent to Acquisition
Improvements	51,794
Gross Carrying Amount
Land	8,833
Building and Improvements	156,929
Total	165,762
Accumulated Depreciation & Amortization	114,736
1299 Ocean | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	124,699
Initial Cost
Land	22,748
Buildings & Improvements	265,198
Cost Capitalized Subsequent to Acquisition
Improvements	15,765
Gross Carrying Amount
Land	22,748
Building and Improvements	280,963
Total	303,711
Accumulated Depreciation & Amortization	30,555
1901 Avenue of the Stars | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	18,514
Buildings & Improvements	131,752
Cost Capitalized Subsequent to Acquisition
Improvements	112,572
Gross Carrying Amount
Land	26,163
Building and Improvements	236,675
Total	262,838
Accumulated Depreciation & Amortization	91,455
2001 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	37,411
Initial Cost
Land	5,711
Buildings & Improvements	81,622
Cost Capitalized Subsequent to Acquisition
Improvements	1,307
Gross Carrying Amount
Land	5,711
Building and Improvements	82,929
Total	88,640
Accumulated Depreciation & Amortization	3,007
8383 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	175,314
Initial Cost
Land	18,004
Buildings & Improvements	328,118
Cost Capitalized Subsequent to Acquisition
Improvements	2,532
Gross Carrying Amount
Land	18,005
Building and Improvements	330,649
Total	348,654
Accumulated Depreciation & Amortization	12,928
8484 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	15,898
Initial Cost
Land	8,846
Buildings & Improvements	77,780
Cost Capitalized Subsequent to Acquisition
Improvements	16,307
Gross Carrying Amount
Land	8,846
Building and Improvements	94,087
Total	102,933
Accumulated Depreciation & Amortization	24,354
9100 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	142,264
Initial Cost
Land	13,455
Buildings & Improvements	258,329
Cost Capitalized Subsequent to Acquisition
Improvements	2,860
Gross Carrying Amount
Land	13,455
Building and Improvements	261,189
Total	274,644
Accumulated Depreciation & Amortization	9,554
9401 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	30,112
Initial Cost
Land	6,740
Buildings & Improvements	152,310
Cost Capitalized Subsequent to Acquisition
Improvements	12,643
Gross Carrying Amount
Land	6,740
Building and Improvements	164,953
Total	171,693
Accumulated Depreciation & Amortization	16,086
9601 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	16,597
Buildings & Improvements	54,774
Cost Capitalized Subsequent to Acquisition
Improvements	106,660
Gross Carrying Amount
Land	17,658
Building and Improvements	160,373
Total	178,031
Accumulated Depreciation & Amortization	62,249
9665 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	77,445
Initial Cost
Land	5,568
Buildings & Improvements	177,072
Cost Capitalized Subsequent to Acquisition
Improvements	21,048
Gross Carrying Amount
Land	5,568
Building and Improvements	198,120
Total	203,688
Accumulated Depreciation & Amortization	19,014
10880 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	198,794
Initial Cost
Land	29,995
Buildings & Improvements	437,514
Cost Capitalized Subsequent to Acquisition
Improvements	33,635
Gross Carrying Amount
Land	29,988
Building and Improvements	471,156
Total	501,144
Accumulated Depreciation & Amortization	68,095
10960 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	201,893
Initial Cost
Land	45,844
Buildings & Improvements	429,769
Cost Capitalized Subsequent to Acquisition
Improvements	30,124
Gross Carrying Amount
Land	45,852
Building and Improvements	459,885
Total	505,737
Accumulated Depreciation & Amortization	68,382
11777 San Vicente | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	44,412
Initial Cost
Land	5,032
Buildings & Improvements	15,768
Cost Capitalized Subsequent to Acquisition
Improvements	29,715
Gross Carrying Amount
Land	6,714
Building and Improvements	43,801
Total	50,515
Accumulated Depreciation & Amortization	17,397
12100 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	101,203
Initial Cost
Land	20,164
Buildings & Improvements	208,755
Cost Capitalized Subsequent to Acquisition
Improvements	9,268
Gross Carrying Amount
Land	20,164
Building and Improvements	218,023
Total	238,187
Accumulated Depreciation & Amortization	32,833
12400 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	5,013
Buildings & Improvements	34,283
Cost Capitalized Subsequent to Acquisition
Improvements	76,833
Gross Carrying Amount
Land	8,828
Building and Improvements	107,301
Total	116,129
Accumulated Depreciation & Amortization	41,710
15250 Ventura | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	22,369
Initial Cost
Land	2,130
Buildings & Improvements	48,908
Cost Capitalized Subsequent to Acquisition
Improvements	696
Gross Carrying Amount
Land	2,130
Building and Improvements	49,604
Total	51,734
Accumulated Depreciation & Amortization	2,155
16000 Ventura | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	37,971
Initial Cost
Land	1,936
Buildings & Improvements	89,531
Cost Capitalized Subsequent to Acquisition
Improvements	505
Gross Carrying Amount
Land	1,936
Building and Improvements	90,036
Total	91,972
Accumulated Depreciation & Amortization	3,546
16501 Ventura | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	42,944
Initial Cost
Land	6,759
Buildings & Improvements	53,112
Cost Capitalized Subsequent to Acquisition
Improvements	12,937
Gross Carrying Amount
Land	6,759
Building and Improvements	66,049
Total	72,808
Accumulated Depreciation & Amortization	17,250
Beverly Hills Medical Center | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	4,955
Buildings & Improvements	27,766
Cost Capitalized Subsequent to Acquisition
Improvements	29,526
Gross Carrying Amount
Land	6,435
Building and Improvements	55,812
Total	62,247
Accumulated Depreciation & Amortization	21,685
Bishop Square | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	200,000
Initial Cost
Land	16,273
Buildings & Improvements	213,793
Cost Capitalized Subsequent to Acquisition
Improvements	38,762
Gross Carrying Amount
Land	16,273
Building and Improvements	252,555
Total	268,828
Accumulated Depreciation & Amortization	75,511
Brentwood Court | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	2,564
Buildings & Improvements	8,872
Cost Capitalized Subsequent to Acquisition
Improvements	906
Gross Carrying Amount
Land	2,563
Building and Improvements	9,779
Total	12,342
Accumulated Depreciation & Amortization	3,869
Brentwood Executive Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	3,255
Buildings & Improvements	9,654
Cost Capitalized Subsequent to Acquisition
Improvements	32,951
Gross Carrying Amount
Land	5,921
Building and Improvements	39,939
Total	45,860
Accumulated Depreciation & Amortization	15,640
Brentwood Medical Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	5,934
Buildings & Improvements	27,836
Cost Capitalized Subsequent to Acquisition
Improvements	1,766
Gross Carrying Amount
Land	5,933
Building and Improvements	29,603
Total	35,536
Accumulated Depreciation & Amortization	11,658
Brentwood San Vicente Medical | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	5,557
Buildings & Improvements	16,457
Cost Capitalized Subsequent to Acquisition
Improvements	1,841
Gross Carrying Amount
Land	5,557
Building and Improvements	18,298
Total	23,855
Accumulated Depreciation & Amortization	6,791
Brentwood/Saltair | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	4,468
Buildings & Improvements	11,615
Cost Capitalized Subsequent to Acquisition
Improvements	11,621
Gross Carrying Amount
Land	4,775
Building and Improvements	22,929
Total	27,704
Accumulated Depreciation & Amortization	9,556
Bundy/Olympic | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	4,201
Buildings & Improvements	11,860
Cost Capitalized Subsequent to Acquisition
Improvements	28,709
Gross Carrying Amount
Land	6,030
Building and Improvements	38,740
Total	44,770
Accumulated Depreciation & Amortization	15,014
Camden Medical Arts | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	42,276
Initial Cost
Land	3,102
Buildings & Improvements	12,221
Cost Capitalized Subsequent to Acquisition
Improvements	28,587
Gross Carrying Amount
Land	5,298
Building and Improvements	38,612
Total	43,910
Accumulated Depreciation & Amortization	14,777
Carthay Campus | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	6,595
Buildings & Improvements	70,454
Cost Capitalized Subsequent to Acquisition
Improvements	5,469
Gross Carrying Amount
Land	6,594
Building and Improvements	75,924
Total	82,518
Accumulated Depreciation & Amortization	16,901
Century Park Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	173,000
Initial Cost
Land	10,275
Buildings & Improvements	70,761
Cost Capitalized Subsequent to Acquisition
Improvements	135,178
Gross Carrying Amount
Land	16,153
Building and Improvements	200,061
Total	216,214
Accumulated Depreciation & Amortization	67,506
Century Park West | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,072
Initial Cost
Land	3,717
Buildings & Improvements	29,099
Cost Capitalized Subsequent to Acquisition
Improvements	244
Gross Carrying Amount
Land	3,667
Building and Improvements	29,393
Total	33,060
Accumulated Depreciation & Amortization	10,964
Columbus Center | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	2,096
Buildings & Improvements	10,396
Cost Capitalized Subsequent to Acquisition
Improvements	9,426
Gross Carrying Amount
Land	2,333
Building and Improvements	19,585
Total	21,918
Accumulated Depreciation & Amortization	7,915
Coral Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	4,028
Buildings & Improvements	15,019
Cost Capitalized Subsequent to Acquisition
Improvements	18,832
Gross Carrying Amount
Land	5,366
Building and Improvements	32,513
Total	37,879
Accumulated Depreciation & Amortization	12,864
Cornerstone Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,928
Initial Cost
Land	8,245
Buildings & Improvements	80,633
Cost Capitalized Subsequent to Acquisition
Improvements	6,016
Gross Carrying Amount
Land	8,263
Building and Improvements	86,631
Total	94,894
Accumulated Depreciation & Amortization	31,950
Encino Gateway | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	8,475
Buildings & Improvements	48,525
Cost Capitalized Subsequent to Acquisition
Improvements	55,830
Gross Carrying Amount
Land	15,653
Building and Improvements	97,177
Total	112,830
Accumulated Depreciation & Amortization	38,892
Encino Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	5,293
Buildings & Improvements	23,125
Cost Capitalized Subsequent to Acquisition
Improvements	47,159
Gross Carrying Amount
Land	6,165
Building and Improvements	69,412
Total	75,577
Accumulated Depreciation & Amortization	27,886
Encino Terrace | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	105,565
Initial Cost
Land	12,535
Buildings & Improvements	59,554
Cost Capitalized Subsequent to Acquisition
Improvements	102,884
Gross Carrying Amount
Land	15,533
Building and Improvements	159,440
Total	174,973
Accumulated Depreciation & Amortization	58,012
Executive Tower | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	14,503
Initial Cost
Land	6,660
Buildings & Improvements	32,045
Cost Capitalized Subsequent to Acquisition
Improvements	57,605
Gross Carrying Amount
Land	9,471
Building and Improvements	86,839
Total	96,310
Accumulated Depreciation & Amortization	34,313
First Financial Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	54,077
Initial Cost
Land	12,092
Buildings & Improvements	81,104
Cost Capitalized Subsequent to Acquisition
Improvements	3,625
Gross Carrying Amount
Land	12,092
Building and Improvements	84,729
Total	96,821
Accumulated Depreciation & Amortization	16,105
Gateway Los Angeles | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	2,376
Buildings & Improvements	15,302
Cost Capitalized Subsequent to Acquisition
Improvements	48,928
Gross Carrying Amount
Land	5,119
Building and Improvements	61,487
Total	66,606
Accumulated Depreciation & Amortization	24,206
Harbor Court | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	51
Buildings & Improvements	41,001
Cost Capitalized Subsequent to Acquisition
Improvements	49,704
Gross Carrying Amount
Land	12,060
Building and Improvements	78,696
Total	90,756
Accumulated Depreciation & Amortization	26,323
Landmark II | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	6,086
Buildings & Improvements	109,259
Cost Capitalized Subsequent to Acquisition
Improvements	67,603
Gross Carrying Amount
Land	13,070
Building and Improvements	169,878
Total	182,948
Accumulated Depreciation & Amortization	66,413
Lincoln/Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	3,833
Buildings & Improvements	12,484
Cost Capitalized Subsequent to Acquisition
Improvements	25,947
Gross Carrying Amount
Land	7,475
Building and Improvements	34,789
Total	42,264
Accumulated Depreciation & Amortization	11,725
MB Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	4,533
Buildings & Improvements	22,024
Cost Capitalized Subsequent to Acquisition
Improvements	33,640
Gross Carrying Amount
Land	7,503
Building and Improvements	52,694
Total	60,197
Accumulated Depreciation & Amortization	20,441
Olympic Center | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	52,000
Initial Cost
Land	5,473
Buildings & Improvements	22,850
Cost Capitalized Subsequent to Acquisition
Improvements	35,110
Gross Carrying Amount
Land	8,247
Building and Improvements	55,186
Total	63,433
Accumulated Depreciation & Amortization	21,262
One Westwood | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	12,300
Initial Cost
Land	10,350
Buildings & Improvements	29,784
Cost Capitalized Subsequent to Acquisition
Improvements	62,108
Gross Carrying Amount
Land	9,194
Building and Improvements	93,048
Total	102,242
Accumulated Depreciation & Amortization	35,741
Palisades Promenade | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	5,253
Buildings & Improvements	15,547
Cost Capitalized Subsequent to Acquisition
Improvements	54,414
Gross Carrying Amount
Land	9,664
Building and Improvements	65,550
Total	75,214
Accumulated Depreciation & Amortization	25,394
Saltair/San Vicente | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	21,533
Initial Cost
Land	5,075
Buildings & Improvements	6,946
Cost Capitalized Subsequent to Acquisition
Improvements	17,365
Gross Carrying Amount
Land	7,557
Building and Improvements	21,829
Total	29,386
Accumulated Depreciation & Amortization	8,606
San Vicente Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	7,055
Buildings & Improvements	12,035
Cost Capitalized Subsequent to Acquisition
Improvements	(19)
Gross Carrying Amount
Land	7,055
Building and Improvements	12,016
Total	19,071
Accumulated Depreciation & Amortization	5,078
Santa Monica Square | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	48,500
Initial Cost
Land	5,366
Buildings & Improvements	18,025
Cost Capitalized Subsequent to Acquisition
Improvements	22,093
Gross Carrying Amount
Land	6,863
Building and Improvements	38,621
Total	45,484
Accumulated Depreciation & Amortization	15,029
Second Street Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	4,377
Buildings & Improvements	15,277
Cost Capitalized Subsequent to Acquisition
Improvements	36,693
Gross Carrying Amount
Land	7,421
Building and Improvements	48,926
Total	56,347
Accumulated Depreciation & Amortization	19,532
Sherman Oaks Galleria | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	300,000
Initial Cost
Land	33,213
Buildings & Improvements	17,820
Cost Capitalized Subsequent to Acquisition
Improvements	415,540
Gross Carrying Amount
Land	48,328
Building and Improvements	418,245
Total	466,573
Accumulated Depreciation & Amortization	161,123
Studio Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	9,347
Buildings & Improvements	73,358
Cost Capitalized Subsequent to Acquisition
Improvements	122,033
Gross Carrying Amount
Land	15,015
Building and Improvements	189,723
Total	204,738
Accumulated Depreciation & Amortization	74,404
The Tower | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	65,969
Initial Cost
Land	9,643
Buildings & Improvements	160,602
Cost Capitalized Subsequent to Acquisition
Improvements	4,628
Gross Carrying Amount
Land	9,643
Building and Improvements	165,230
Total	174,873
Accumulated Depreciation & Amortization	25,697
The Trillium | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	18,300
Initial Cost
Land	20,688
Buildings & Improvements	143,263
Cost Capitalized Subsequent to Acquisition
Improvements	81,855
Gross Carrying Amount
Land	21,989
Building and Improvements	223,817
Total	245,806
Accumulated Depreciation & Amortization	85,272
Valley Executive Tower | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	104,000
Initial Cost
Land	8,446
Buildings & Improvements	67,672
Cost Capitalized Subsequent to Acquisition
Improvements	105,315
Gross Carrying Amount
Land	11,737
Building and Improvements	169,696
Total	181,433
Accumulated Depreciation & Amortization	65,685
Valley Office Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	5,731
Buildings & Improvements	24,329
Cost Capitalized Subsequent to Acquisition
Improvements	47,285
Gross Carrying Amount
Land	8,957
Building and Improvements	68,388
Total	77,345
Accumulated Depreciation & Amortization	26,985
Verona | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	2,574
Buildings & Improvements	7,111
Cost Capitalized Subsequent to Acquisition
Improvements	15,396
Gross Carrying Amount
Land	5,111
Building and Improvements	19,970
Total	25,081
Accumulated Depreciation & Amortization	7,788
Village on Canon | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	61,745
Initial Cost
Land	5,933
Buildings & Improvements	11,389
Cost Capitalized Subsequent to Acquisition
Improvements	50,309
Gross Carrying Amount
Land	13,303
Building and Improvements	54,328
Total	67,631
Accumulated Depreciation & Amortization	20,858
Warner Center Towers | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	335,000
Initial Cost
Land	43,110
Buildings & Improvements	292,147
Cost Capitalized Subsequent to Acquisition
Improvements	425,283
Gross Carrying Amount
Land	59,418
Building and Improvements	701,122
Total	760,540
Accumulated Depreciation & Amortization	274,820
Warner Corporate Center | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	34,671
Initial Cost
Land	11,035
Buildings & Improvements	65,799
Cost Capitalized Subsequent to Acquisition
Improvements	1,011
Gross Carrying Amount
Land	11,035
Building and Improvements	66,810
Total	77,845
Accumulated Depreciation & Amortization	3,332
Westside Towers | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	141,915
Initial Cost
Land	8,506
Buildings & Improvements	79,532
Cost Capitalized Subsequent to Acquisition
Improvements	81,997
Gross Carrying Amount
Land	14,568
Building and Improvements	155,467
Total	170,035
Accumulated Depreciation & Amortization	60,811
Westwood Center | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	113,344
Initial Cost
Land	9,512
Buildings & Improvements	259,341
Cost Capitalized Subsequent to Acquisition
Improvements	10,984
Gross Carrying Amount
Land	9,513
Building and Improvements	270,324
Total	279,837
Accumulated Depreciation & Amortization	42,236
Westwood Place | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	71,000
Initial Cost
Land	8,542
Buildings & Improvements	44,419
Cost Capitalized Subsequent to Acquisition
Improvements	52,519
Gross Carrying Amount
Land	11,448
Building and Improvements	94,032
Total	105,480
Accumulated Depreciation & Amortization	36,139
555 Barrington | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	50,000
Initial Cost
Land	6,461
Buildings & Improvements	27,639
Cost Capitalized Subsequent to Acquisition
Improvements	40,890
Gross Carrying Amount
Land	14,903
Building and Improvements	60,087
Total	74,990
Accumulated Depreciation & Amortization	23,363
Barrington Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	210,000
Initial Cost
Land	28,568
Buildings & Improvements	81,485
Cost Capitalized Subsequent to Acquisition
Improvements	148,028
Gross Carrying Amount
Land	58,208
Building and Improvements	199,873
Total	258,081
Accumulated Depreciation & Amortization	78,529
Barrington/Kiowa | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	13,940
Initial Cost
Land	5,720
Buildings & Improvements	10,052
Cost Capitalized Subsequent to Acquisition
Improvements	731
Gross Carrying Amount
Land	5,720
Building and Improvements	10,783
Total	16,503
Accumulated Depreciation & Amortization	4,226
Barry | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,370
Initial Cost
Land	6,426
Buildings & Improvements	8,179
Cost Capitalized Subsequent to Acquisition
Improvements	550
Gross Carrying Amount
Land	6,426
Building and Improvements	8,729
Total	15,155
Accumulated Depreciation & Amortization	3,526
Kiowa | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,470
Initial Cost
Land	2,605
Buildings & Improvements	3,263
Cost Capitalized Subsequent to Acquisition
Improvements	469
Gross Carrying Amount
Land	2,605
Building and Improvements	3,732
Total	6,337
Accumulated Depreciation & Amortization	1,485
Moanalua Hillside Apartments | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	255,000
Initial Cost
Land	24,791
Buildings & Improvements	157,353
Cost Capitalized Subsequent to Acquisition
Improvements	121,051
Gross Carrying Amount
Land	35,365
Building and Improvements	267,830
Total	303,195
Accumulated Depreciation & Amortization	54,824
Residences at Bishop Place | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	0
Buildings & Improvements	0
Cost Capitalized Subsequent to Acquisition
Improvements	35,025
Gross Carrying Amount
Land	0
Building and Improvements	35,025
Total	35,025
Accumulated Depreciation & Amortization	449
Pacific Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	78,000
Initial Cost
Land	10,091
Buildings & Improvements	16,159
Cost Capitalized Subsequent to Acquisition
Improvements	74,232
Gross Carrying Amount
Land	27,816
Building and Improvements	72,666
Total	100,482
Accumulated Depreciation & Amortization	27,494
The Glendon | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	160,000
Initial Cost
Land	32,773
Buildings & Improvements	335,925
Cost Capitalized Subsequent to Acquisition
Improvements	1,257
Gross Carrying Amount
Land	32,775
Building and Improvements	337,180
Total	369,955
Accumulated Depreciation & Amortization	15,307
The Shores | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	212,000
Initial Cost
Land	20,809
Buildings & Improvements	74,191
Cost Capitalized Subsequent to Acquisition
Improvements	199,738
Gross Carrying Amount
Land	60,555
Building and Improvements	234,183
Total	294,738
Accumulated Depreciation & Amortization	88,257
Villas at Royal Kunia | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	94,220
Initial Cost
Land	42,887
Buildings & Improvements	71,376
Cost Capitalized Subsequent to Acquisition
Improvements	15,231
Gross Carrying Amount
Land	35,163
Building and Improvements	94,331
Total	129,494
Accumulated Depreciation & Amortization	41,691
Waena Apartments | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	102,400
Initial Cost
Land	26,864
Buildings & Improvements	119,273
Cost Capitalized Subsequent to Acquisition
Improvements	1,843
Gross Carrying Amount
Land	26,864
Building and Improvements	121,116
Total	147,980
Accumulated Depreciation & Amortization	20,055
Owensmouth Warner | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	23,848
Buildings & Improvements	0
Cost Capitalized Subsequent to Acquisition
Improvements	0
Gross Carrying Amount
Land	23,848
Building and Improvements	0
Total	23,848
Accumulated Depreciation & Amortization	0
1132 Bishop Place Conversion | Property Under Development
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	0
Buildings & Improvements	0
Cost Capitalized Subsequent to Acquisition
Improvements	50,704
Gross Carrying Amount
Land	0
Building and Improvements	50,704
Total	50,704
Accumulated Depreciation & Amortization
Landmark II Development | Property Under Development
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	13,070
Buildings & Improvements	0
Cost Capitalized Subsequent to Acquisition
Improvements	173,409
Gross Carrying Amount
Land	13,070
Building and Improvements	173,409
Total	186,479
Accumulated Depreciation & Amortization
Other Developments | Property Under Development
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances
Initial Cost
Land
Buildings & Improvements
Cost Capitalized Subsequent to Acquisition
Improvements	17,114
Gross Carrying Amount
Land
Building and Improvements	17,114
Total	17,114
Accumulated Depreciation & Amortization

Schedule III - Consolidated R_3

Schedule III - Consolidated Real Estate and Accumulated Depreciation and Amortization - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investment in real estate, gross [Roll Forward]
Beginning balance	$ 11,478,633	$ 10,030,708	$ 9,829,208
Property acquisitions	0	368,698	0
Consolidation of JV	0	924,578	0
Improvements and developments	297,558	242,854	277,229
Properties sold	(24,508)	0	0
Removal of fully depreciated and amortized tenant improvements and lease intangibles	(73,045)	(88,205)	(75,729)
Ending balance	11,678,638	11,478,633	10,030,708
Accumulated depreciation and amortization [Roll Forward]
Beginning balance	(2,518,415)	(2,246,887)	(2,012,752)
Depreciation and amortization	(385,248)	(357,743)	(309,864)
Properties sold	10,002	0	0
Other accumulated depreciation and amortization	4,423	(1,990)	0
Removal of fully depreciated and amortized tenant improvements and lease intangibles	73,045	88,205	75,729
Ending balance	(2,816,193)	(2,518,415)	(2,246,887)
Investment in real estate, net	$ 8,862,445	$ 8,960,218	$ 7,783,821