Douglas Emmett (DEI) 10-K 14 Feb 20 2019 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Feb. 07, 2020	Jun. 28, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	1-33106
Entity Registrant Name	Douglas Emmett, Inc.
Entity Central Index Key	0001364250
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
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
Entity Shell Company	false
Entity Public Float			$ 6,610
Common Shares Outstanding		175,373,806
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement to be issued in conjunction with the registrant’s annual meeting of shareholders to be held in 2020 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, 2019 .

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Investment in real estate:
Land	$ 1,152,684	$ 1,065,099
Buildings and improvements	9,308,481	7,995,203
Tenant improvements and lease intangibles	905,753	840,653
Property under development	111,715	129,753
Investment in real estate, gross	11,478,633	10,030,708
Less: accumulated depreciation and amortization	(2,518,415)	(2,246,887)
Investment in real estate, net	8,960,218	7,783,821
Ground lease right-of-use asset	7,479
Cash and cash equivalents	153,683	146,227
Tenant receivables	5,302	4,371
Deferred rent receivables	134,968	124,834
Acquired lease intangible assets, net	6,407	3,251
Interest rate contract assets	22,381	73,414
Investment in unconsolidated Funds	42,442	111,032
Other assets	16,421	14,759
Total Assets	9,349,301	8,261,709
Liabilities
Secured notes payable and revolving credit facility, net	4,619,058	4,134,030
Ground lease liability	10,882
Interest payable, accounts payable and deferred revenue	131,410	130,154
Security deposits	60,923	50,733
Acquired lease intangible liabilities, net	52,367	52,569
Interest rate contract liabilities	54,616	1,530
Dividends payable	49,111	44,263
Total liabilities	4,978,367	4,413,279
Douglas Emmett, Inc. stockholders' equity:
Common Stock, $0.01 par value, 750,000,000 authorized, 175,369,746 and 170,214,809 outstanding at December 31, 2019 and December 31, 2018, respectively	1,754	1,702
Additional paid-in capital	3,486,356	3,282,316
Accumulated other comprehensive (loss) income	(17,462)	53,944
Accumulated deficit	(758,576)	(935,630)
Total Douglas Emmett, Inc. stockholders' equity	2,712,072	2,402,332
Noncontrolling interests	1,658,862	1,446,098
Total equity	4,370,934	3,848,430
Total Liabilities and Equity	$ 9,349,301	$ 8,261,709

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
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)	175,369,746	170,214,809

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Revenues	$ 936,682	$ 881,316	$ 812,052
Operating Expenses
General and administrative expenses	38,068	38,641	36,234
Depreciation and amortization	357,743	309,864	276,761
Total operating expenses	693,974	629,372	571,029
Operating income	242,708	251,944	241,023
Other income	11,653	11,414	9,712
Other expenses	(7,216)	(7,744)	(7,037)
Income from unconsolidated Funds	6,923	6,400	5,905
Interest expense	(143,308)	(133,402)	(145,176)
Gain from consolidation of JV	307,938	0	0
Net income	418,698	128,612	104,427
Less: Net income attributable to noncontrolling interests	(54,985)	(12,526)	(9,984)
Net income attributable to common stockholders	$ 363,713	$ 116,086	$ 94,443
Net income attributable to common stockholders per share – basic (usd per share)	$ 2.09	$ 0.68	$ 0.58
Net income attributable to common stockholders per share – diluted (usd per share)	$ 2.09	$ 0.68	$ 0.58
Office rental
Revenues
Revenues	$ 816,755	$ 777,931	$ 715,546
Operating Expenses
Operating expenses	264,482	252,751	233,633
Office rental | Rental revenues and tenant recoveries
Revenues
Revenues	694,315	661,147	606,852
Office rental | Parking and other income
Revenues
Revenues	122,440	116,784	108,694
Multifamily rental
Revenues
Revenues	119,927	103,385	96,506
Operating Expenses
Operating expenses	33,681	28,116	24,401
Multifamily rental | Rental revenues
Revenues
Revenues	110,697	95,423	89,039
Multifamily rental | Parking and other income
Revenues
Revenues	$ 9,230	$ 7,962	$ 7,467

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 418,698	$ 128,612	$ 104,427
Other comprehensive (loss) income: cash flow hedges	(107,292)	15,070
Other comprehensive (loss) income: cash flow hedges			34,290
Comprehensive income	311,406	143,682	138,717
Less: Comprehensive income attributable to noncontrolling interests	(19,099)	(16,751)	(16,331)
Comprehensive income attributable to common stockholders	$ 292,307	$ 126,931	$ 122,386

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	AOCI	Accumulated Deficit	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2016		151,530,000
Stockholders' Equity [Roll Forward]
Exchange of OP units for common stock (in shares)	1,100,000	1,059,000
Issuance of common stock (in shares)	15,700,000	15,687,000
Exercise of stock options (in shares)	3,920,000	1,289,000
Ending balance (in shares) at Dec. 31, 2017		169,565,000
Beginning balance at Dec. 31, 2016	$ 3,014,071	$ 1,515	$ 2,725,157	$ 15,156	$ (820,685)	$ 1,092,928
Stockholders' Equity [Roll Forward]
Exchange of OP units for common stock		11	14,231			(14,242)
Issuance of common stock, net	593,168	157	593,011
Exercise of stock options		13
Repurchase of OP Units with cash	(10,104)		(6,763)			(3,341)
Taxes paid on exercise of stock options	(53,084)		(53,097)
Cash flow hedge adjustments	34,290			27,943		6,347
Net income	104,427					9,984
Net income attributable to common stockholders	94,443				94,443
Dividends	(153,568)				(153,568)
Contributions	284,248					284,248
Distributions	(38,101)					(38,101)
Issuance of OP Units for acquisition of additional interest in unconsolidated Fund	0
Issuance of OP Units for acquisition of real estate	105,687					105,687
Stock-based compensation	21,015					21,015
Ending balance at Dec. 31, 2017	$ 3,902,049	$ 1,696	3,272,539	43,099	(879,810)	1,464,525
Stockholders' Equity [Roll Forward]
Dividends declared per common share (in dollars per share)	$ 0.94
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	170,214,809	170,215,000
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
Net income	128,612				116,086	12,526
Net income attributable to common stockholders	116,086
Dividends	(171,695)				(171,695)
Cash flow hedge adjustments	14,859
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	$ 1,702	3,282,316	53,944	(935,630)	1,446,098
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
Net income attributable to common stockholders	363,713
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	$ 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

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Activities
Net income	$ 418,698	$ 128,612	$ 104,427
Adjustments to reconcile net income to net cash provided by operating activities:
Income from unconsolidated Funds	(6,923)	(6,400)	(5,905)
Gain from consolidation of JV	(307,938)	0	0
Depreciation and amortization	357,743	309,864	276,761
Net accretion of acquired lease intangibles	(16,264)	(22,025)	(18,006)
Straight-line rent	(10,134)	(18,813)	(12,855)
Write-off of uncollectible amounts	4,103	2,154	406
Deferred loan costs amortized and written off	14,314	8,292	10,834
Amortization of loan premium	(261)	(205)	0
Derivative non-cash adjustments	0	0	51
Amortization of stock-based compensation	18,359	22,299	18,478
Operating distributions from unconsolidated Funds	6,820	6,400	5,905
Change in working capital components:
Tenant receivables	(4,712)	(3,545)	(1,221)
Interest payable, accounts payable and deferred revenue	(6,844)	1,376	24,942
Security deposits	1,919	319	4,424
Other assets	706	4,654	(5,544)
Net cash provided by operating activities	469,586	432,982	402,697
Investing Activities
Capital expenditures for improvements to real estate	(176,448)	(179,062)	(108,326)
Capital expenditures for developments	(61,660)	(68,459)	(63,018)
Property acquisitions	(365,885)	0	(537,669)
Cash assumed from consolidation of JV	39,226	0	0
Acquisition of additional interests in unconsolidated Funds	(90,754)	(9,379)	(4,142)
Capital distributions from unconsolidated Funds	5,853	7,349	43,560
Net cash used in investing activities	(649,668)	(249,551)	(669,595)
Financing Activities
Proceeds from borrowings	2,185,000	667,000	1,410,500
Repayment of borrowings	(2,095,718)	(655,326)	(1,698,544)
Loan cost payments	(21,348)	(2,992)	(11,442)
Contributions from noncontrolling interests in consolidated JVs	163,556	0	284,248
Distributions paid to noncontrolling interests	(64,534)	(52,142)	(38,101)
Dividends paid to common stockholders	(179,667)	(169,831)	(146,026)
Taxes paid on exercise of stock options	0	(450)	(53,084)
Repurchase of OP Units	(734)	(108)	(10,104)
Proceeds from issuance of common stock, net	200,983	0	593,169
Net cash provided by (used in) financing activities	187,538	(213,849)	330,616
Increase (decrease) in cash and cash equivalents and restricted cash	7,456	(30,418)	63,718
Cash and cash equivalents and restricted cash - beginning balance	146,348	176,766	113,048
Cash and cash equivalents and restricted cash - ending balance	153,804	146,348	176,766
Operating Activities
Cash paid for interest, net of capitalized interest	128,205	124,487	135,824
Capitalized interest paid	3,782	3,520	2,745
Non-cash Investing Transactions
Accrual for real estate and development capital expenditures	35,398	24,702	3,776
Capitalized stock-based compensation for improvements to real estate and developments	4,698	5,006	2,537
Removal of fully depreciated and amortized tenant improvements and lease intangibles	88,205	75,729	53,687
Removal of fully amortized acquired lease intangible assets	2,132	1,582	414
Removal of fully accreted acquired lease intangible liabilities	29,660	15,431	5,057
Recognition of ground lease right-of-use asset - Adoption of ASU 2016-02	10,885
Above-market ground lease intangible liability offset against right-of-use asset - Adoption of ASU 2016-02	3,408
Recognition of ground lease liability - Adoption of ASU 2016-02	10,885
Non-cash Financing Transactions
Gain recorded in AOCI - Adoption of ASU 2017-12 - consolidated derivatives	0	211	0
Gain recorded in AOCI	(76,273)	22,723
Gain recorded in AOCI			16,512
Accrual for deferred loan costs	1,416	0	0
Assumption of term loan for acquisition of real estate	0	0	36,460
Non-cash contributions from noncontrolling interests in consolidated JVs	12,444	0	0
Non-cash distributions to noncontrolling interests	12,444	0	0
Dividends declared	184,515	171,695	153,568
Exchange of OP units for common stock	3,540	10,292	14,242
Issuance of OP Units for acquisition of real estate	0	0	105,687
OP Units issued for acquisition of additional interest in unconsolidated Fund	14,390	0	0
Unconsolidated Fund
Non-cash Financing Transactions
Gain recorded in AOCI	$ (5,023)	$ 3,052
Gain recorded in AOCI			$ 3,275

Overview

Overview	12 Months Ended
	Dec. 31, 2019
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, 2019 , our Consolidated Portfolio consisted of (i) an 18.0 million square foot office portfolio, (ii) 4,161 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, 2019 , 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, 2019 , 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 17 17 Unconsolidated Fund properties — 2 70 72 Multifamily Wholly-owned properties 10 10 Consolidated JV properties 1 1 11 11 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 $3.11 billion of consolidated debt. See Note 8 . We also consolidate four JVs. As of December 31, 2019 , these consolidated entities had aggregate total consolidated assets of $9.35 billion (of which $8.96 billion related to investment in real estate), aggregate total consolidated liabilities of $4.98 billion (of which $4.62 billion related to debt), and aggregate total consolidated equity of $4.37 billion (of which $1.66 billion related to noncontrolling interests). The accompanying consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC in conformity with US GAAP as established by the FASB in the ASC. The accompanying consolidated financial statements include, in our opinion, all adjustments, consisting of normal recurring adjustments, necessary to present fairly the financial information set forth therein. Any references to the number or class of properties, square footage, per square footage amounts, apartment units and geography, are unaudited and outside the scope of our independent registered public accounting firm’s audit of our consolidated financial statements in accordance with the standards of the PCAOB. During the current reporting period, we reported our demolition expenses as part of Other expenses in our consolidated statements of operations and we reclassified the comparable periods to conform to the current period presentation.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
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, 2019 and 2018 , 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. 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 Property under development in our consolidated balance sheets. Once major construction activity has ceased and the development or redevelopment property is in the lease-up phase, the capitalized costs are transferred to (i) Land, (ii) Building and improvements and (iii) Tenant improvements and lease intangibles on our consolidated balance sheets as the historical cost of the property. Demolition expenses and repairs and maintenance are recorded as expense when incurred. During 2019 , 2018 and 2017 , we capitalized $75.3 million , $78.7 million and $66.0 million of costs related to our developments, respectively, which included $3.8 million , $3.5 million and $2.7 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, see New Accounting Pronouncements further below. 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 sheet 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 sheet. As of December 31, 2019 and 2018 , the total investment basis difference included in our investment balance in unconsolidated Funds was $27.8 million and $2.2 million , respectively. 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. We also perform a similar periodic assessment for our investments in our Funds. Based upon such periodic assessments, no impairments occurred during 2019 , 2018 or 2017 . In downtown Honolulu, at 1132 Bishop Street, we are converting a 25 story, 490,000 square foot office tower into approximately 500 apartments. We expect the conversion to occur in phases over a number of years as the office space is vacated. Due to the change in planned use of the property, we performed an impairment assessment 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 as of December 31, 2019. 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, see New Accounting Pronouncements further below. 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. Deferred rent receivables represent rental revenue recognized on a straight-line basis in excess of billed rents. If a lease is canceled then the deferred rent is recognized over the new remaining lease term. We recognized straight line rent of $10.1 million , $18.8 million and $12.9 million during 2019 , 2018 and 2017 , respectively. 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 $0.5 million , $1.6 million and $2.1 million during 2019 , 2018 and 2017 , 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 $5.8 million , $3.5 million and $2.6 million during 2019 , 2018 and 2017 , 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, if collectibility of the lease payments is not probable at the commencement date, then we limit the lease income to the lesser of the income recognized on a straight-line basis or cash basis. If our assessment of collectibility changes after the commencement date, we 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 lease income. We elected to adopt the complete impairment model guidance within Topic 842. Under this model, commencing on January 1, 2019, we no longer maintain a general reserve related to our receivables, and instead analyze, on a lease-by-lease basis, whether amounts due under the operating lease are deemed probable for collection. We write off tenant and deferred rent receivables as a charge against rental revenue in the period we determine the lease payments are not probable for collection. Before the adoption of Topic 842, we presented our tenant receivables and deferred rent receivables net of allowances on our consolidated balance sheets. 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. 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. The table below presents our allowances and security obtained from our tenants before we adopted Topic 842: (In thousands) December 31, 2018 Allowance for tenant receivables $ 5,215 Allowance for deferred rent receivables $ 2,849 Letters of credit from our tenants $ 27,749 Cash security deposits from our tenants $ 50,733 The table below presents the impact of the changes in our allowances on our results of operations: Year Ended December 31, (In thousands) 2018 2017 Tenant receivables allowance - decrease in net income $ (2,154 ) $ (406 ) Deferred rent receivables allowance - increase in net income $ 556 $ 1,739 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", which we adopted on January 1, 2018 on a modified retrospective basis. Topic 606 did not significantly change our accounting policy for parking revenues. 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 $108.7 million , $102.5 million and $96.2 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. Office parking receivables were $1.3 million and $1.1 million as of December 31, 2019 and 2018 , respectively, and are included in Tenant receivables in our consolidated balance sheets. Insurance Recoveries Insurance recoveries related to property damage are recorded as other income when payment is either received or receipt is determined to be probable. 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, see New Accounting Pronouncements further below. 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. 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 balance sheet. 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 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 several of our subsidiaries as TRSs, 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 2019 , 2018 or 2017 . 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 during we expect to be applicable and have a material impact on our consolidated financial statements. ASUs Adopted During 2019 we adopted the ASU listed below: ASU 2016-02 (Topic 842 - "Leases") In February 2016, the FASB issued ASU No. 2016-02, (Topic 842 - "Leases"). The primary impact of the ASU is the recognition of lease assets and liabilities on the balance sheet by lessees for leases classified as operating leases. The accounting applied by lessors is largely unchanged. For example, the vast majority of operating leases remain classified as operating leases, and lessors continue to recognize lease payments for those leases on a straight-line basis over the lease term. We adopted the ASU on January 1, 2019 using the modified retrospective transition method. We recorded cumulative adjustments of $2.1 million and $0.4 million to the opening balances of accumulated deficit and noncontrolling interests, respectively, for leasing expenses related to leases that were entered into before the adoption date but commenced after the adoption date. The ASU provides a practical expedient package, which we elected to use, that allows entities (a) not to reassess whether any expired or existing contracts as of the adoption date are considered or contain leases; (b) not to reassess the lease classification for any expired or existing leases as of the adoption date; and (c) not to reassess initial direct costs for any existing leases as of the adoption date. All leases entered into on or after the adoption date were accounted for under the ASU. We lease space to tenants at our office and multifamily properties. Under the ASU, all of our tenant leases continue to be classified as operating leases. The ASU continues to require that lease payments for operating leases be recognized over the lease term on a straight-line basis unless another systematic and rational basis is more representative of the pattern in which benefit is expected to be derived from the use of the underlying asset. If collectibility of the lease payments is not probable at the commencement date, then the lease income should be limited to the lesser of the income recognized on a straight-line basis or cash basis. If the assessment of collectibility changes after the commencement date, any difference between the lease income that would have been recognized on a straight-line basis and cash basis must be recognized as a current-period adjustment to lease income. We elected to adopt the complete impairment model guidance within ASC 842. Under this model we no longer maintain a general reserve related to our receivables, and instead analyze, on a lease-by-lease basis, whether amounts due under the operating lease are deemed probable for collection. We write off tenant and deferred rent receivables as a charge against rental revenue in the period we determine the lease payments are not probable for collection. The ASU requires separation of the lease from the non-lease components (for example, maintenance services or other activities that transfer a good or service to the customer) in a contract. Only the lease components are accounted for in accordance with the ASU. The consideration in the contract is allocated to the lease and non-lease components on a relative standalone selling price basis and the non-lease component would be accounted for in accordance with ASC 606 ("Revenue from Contracts with Customers"). In July 2018, the FASB issued ASU No. 2018-11 which includes an optional practical expedient for lessors to elect, by class of underlying asset, to not separate the lease from the non-lease components if certain criteria are met. Our office tenant leases include a lease component for the rental income and a non-lease component for the related tenant recoveries. We determined that our office tenant leases qualify for the single component presentation and we adopted the practical expedient. We account for the combined components under the ASU. Rental revenues and tenant recoveries from our office tenant leases is included in Rental revenues and tenant recoveries under Office rental in our consolidated statements of operations. Rental revenues from our multifamily tenant leases is included in multifamily Rental revenues in our consolidated statements of operations. Rental revenue recognized on a straight-line basis in excess of billed rents is included in Deferred rent receivables in our consolidated balance sheets. See Note 16 for more information regarding the future lease rental receipts from our operating leases. The ASU defines initial direct costs of a lease, which may be capitalized, as 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 may not be capitalized. We historically capitalized most of our leasing costs. We expensed $4.2 million during the year ended December 31, 2019 , of leasing costs related to our tenant leases that did not qualify as initial direct costs of a lease, which are included in General and administrative expenses in our consolidated statements of operations. We pay rent under a ground lease which expires

Investment in Real Estate

Investment in Real Estate	12 Months Ended
	Dec. 31, 2019
Asset Acquisition [Abstract]
Investment in Real Estate	Investment in Real Estate We account for our property acquisitions as asset acquisitions. The acquired property's results of operations are included in our results of operations from the respective acquisition dates. 2019 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. See Note 14 for our fair value disclosures. 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. See Note 14 for our fair value disclosures. 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 Acquisitions During 2018, we did not purchase any properties. 2017 Acquisitions During 2017, (i) a consolidated JV that we manage and in which we own an equity interest acquired three Class A office properties (1299 Ocean Avenue, 429 Santa Monica Boulevard and 9665 Wilshire Boulevard), for which investors contributed $284.0 million directly to the JV, and (ii) we acquired one wholly-owned Class A office property (9401 Wilshire Boulevard). The table below summarizes the purchase price allocations for the acquisitions. The contract and purchase prices differ due to prorations and similar matters. (In thousands) 1299 Ocean 429 Santa Monica 9665 Wilshire 9401 Wilshire (1) Submarket Santa Monica Santa Monica Beverly Hills Beverly Hills Acquisition date April 25 April 25 July 20 December 20 Contract price $ 275,800 $ 77,000 $ 177,000 $ 143,647 Building square footage 206 87 171 146 Investment in real estate: Land $ 22,748 $ 4,949 $ 5,568 $ 6,740 Buildings and improvements 260,188 69,286 175,960 144,467 Tenant improvements and lease intangibles 5,010 3,248 1,112 7,843 Acquired above- and below-market leases, net (10,683 ) (722 ) (4,339 ) (11,559 ) Assumed debt (2) — — — (36,460 ) Net assets and liabilities acquired $ 277,263 $ 76,761 $ 178,301 $ 111,031 _____________________________________________________ (1) We issued OP Units to the seller in connection with the acquisition of 9401 Wilshire. See Note 11 for more information. (2) We assumed a loan from the seller in connection with the acquisition of 9401 Wilshire. At the date of acquisition, the loan had a fair value of $36.5 million and a principal balance of $32.3 million . See Note 8 for more information.

Ground Lease

Ground Lease	12 Months Ended
	Dec. 31, 2019
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, 2019 , the 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 2019 , 2018 and 2017 , 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, 2019 : Year ending December 31: (In thousands) 2020 $ 733 2021 733 2022 733 2023 733 2024 733 Thereafter 45,445 Total future minimum lease payments $ 49,110

Acquired Lease Intangibles

Acquired Lease Intangibles	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired Lease Intangibles	Acquired Lease Intangibles Summary of our Acquired Lease Intangibles (In thousands) December 31, 2019 December 31, 2018 Above-market tenant leases $ 7,220 $ 5,595 Above-market tenant leases - accumulated amortization (1,741 ) (3,289 ) Above-market ground lease where we are the lessor 1,152 1,152 Above-market ground lease - accumulated amortization (224 ) (207 ) Acquired lease intangible assets, net $ 6,407 $ 3,251 Below-market tenant leases $ 102,583 $ 112,175 Below-market tenant leases - accumulated accretion (50,216 ) (63,013 ) Above-market ground lease where we are the tenant (1) — 4,017 Above-market ground lease - accumulated accretion (1) — (610 ) Acquired lease intangible liabilities, net $ 52,367 $ 52,569 ___________________________________________________ (1) 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 . 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) 2019 2018 2017 Net accretion of above- and below-market tenant lease assets and liabilities (1) $ 16,282 $ 21,992 $ 17,973 Amortization of an above-market ground lease asset (2) (18 ) (17 ) (17 ) Accretion of an above-market ground lease liability (3) — 50 50 Total $ 16,264 $ 22,025 $ 18,006 _______________________________________________________________________________________ (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, 2019 . Year ending December 31: Net increase to revenues (In thousands) 2020 $ 15,339 2021 9,371 2022 6,674 2023 4,576 2024 3,702 Thereafter 6,298 Total $ 45,960

Investments in Unconsolidated F

Investments in Unconsolidated Funds	12 Months Ended
	Dec. 31, 2019
Real Estate Investments, Net [Abstract]
Investments in Unconsolidated Funds	Investments in Unconsolidated Funds Description of our Funds As of December 31, 2019 , we manage and own an equity interest of 29.9% 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. 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. 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) 2019 2018 2017 Operating distributions received (1) $ 6,820 $ 6,400 $ 5,905 Capital distributions received (1) 5,853 7,349 43,560 Total distributions received (1) $ 12,673 $ 13,749 $ 49,465 __________________________________________________________ (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, 2019. 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 acquired book value: (In thousands) December 31, 2019 December 31, 2018 Total assets (1) $ 136,479 $ 694,713 Total liabilities (1) $ 113,330 $ 525,483 Total equity (1) $ 23,149 $ 169,230 _______________________________________________ (1) The balances as of December 31, 2019 reflect the balances for Partnership X. The balances as of December 31, 2018 reflect the combined balances for Partnership X, Fund X and the Opportunity Fund. Year Ended December 31, (In thousands) 2019 2018 2017 Total revenues (1) $ 75,952 $ 79,590 $ 75,896 Operating income (1) $ 22,269 $ 22,959 $ 20,640 Net income (1) $ 7,350 $ 6,260 $ 5,085 _________________________________________________ (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, 2019.

Other Assets

Other Assets	12 Months Ended
	Dec. 31, 2019
Other Assets [Abstract]
Other Assets	Other Assets (In thousands) December 31, 2019 December 31, 2018 Restricted cash $ 121 $ 121 Prepaid expenses 8,711 7,830 Other indefinite-lived intangibles 1,988 1,988 Furniture, fixtures and equipment, net 2,368 1,101 Other 3,233 3,719 Total other assets $ 16,421 $ 14,759

Secured Notes Payable and Revol

Secured Notes Payable and Revolving Credit Facility, Net	12 Months Ended
	Dec. 31, 2019
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, 2019 Principal Balance as of December 31, 2018 Variable Interest Rate Fixed Interest Rate (2) Swap Maturity Date (In thousands) Wholly-Owned Subsidiaries Fannie Mae loan (3) — $ — $ 145,000 — — — Fannie Mae loan (3) — — 115,000 — — — Term loan (3) — — 220,000 — — — Term loan (3) — — 340,000 — — — Term loan (3) — — 400,000 — — — Term loan (3) — — 180,000 — — — Term loan (3) — — 360,000 — — — Term loan (4) 1/1/2024 300,000 300,000 LIBOR + 1.55% 3.46% 1/1/2022 Term loan (4) 3/3/2025 335,000 335,000 LIBOR + 1.30% 3.84% 3/1/2023 Fannie Mae loan (4)(5) 4/1/2025 102,400 102,400 LIBOR + 1.25% 2.84% 3/1/2023 Term loan (4)(6)(7) 8/15/2026 415,000 — LIBOR + 1.10% 2.58% 8/1/2025 Term loan (4)(6) 9/19/2026 400,000 — LIBOR + 1.15% 2.44% 9/1/2024 Term loan (4)(6)(8) 9/26/2026 200,000 — LIBOR + 1.20% 2.77% 10/1/2024 Term loan (4)(6)(9) 11/1/2026 400,000 — LIBOR + 1.15% 2.18% 10/1/2024 Fannie Mae loan (4) 6/1/2027 550,000 550,000 LIBOR + 1.37% 3.16% 6/1/2022 Fannie Mae loan (4)(6) 6/1/2029 255,000 — LIBOR + 0.98% 3.26% 6/1/2027 Fannie Mae loan (4)(6)(10) 6/1/2029 125,000 — LIBOR + 0.98% 2.55% 6/1/2027 Term loan (11) 6/1/2038 30,864 31,582 N/A 4.55% N/A Revolving credit facility (12) 8/21/2023 — 105,000 LIBOR + 1.15% N/A N/A Total Wholly-Owned Subsidiary Debt 3,113,264 3,183,982 Consolidated JVs Term loan (4) 2/28/2023 580,000 580,000 LIBOR + 1.40% 2.37% 3/1/2021 Term loan (4)(13) 7/1/2024 400,000 — LIBOR + 1.65% 3.44% 7/1/2022 Term loan (4) 12/19/2024 400,000 400,000 LIBOR + 1.30% 3.47% 1/1/2023 Term loan (4)(6) 6/1/2029 160,000 — LIBOR + 0.98% 3.25% 7/1/2027 Total Consolidated Debt (14) 4,653,264 4,163,982 Unamortized loan premium, net 6,741 3,986 Unamortized deferred loan costs, net (40,947 ) (33,938 ) Total Consolidated Debt, net $ 4,619,058 $ 4,134,030 _____________________________________________________ Except as noted below, each loan (including our revolving credit facility) is non-recourse and secured by one or more separate collateral pools consisting of one or more properties, and requires monthly payments of interest only with the outstanding principal due upon maturity. Certain of our loans require us to pay down the loan if necessary for the properties involved to meet minimum financial thresholds, although we have never had to make such a payment. (1) Maturity dates include the effect of extension options. (2) 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) At December 31, 2019 , these loans have been paid off. (4) Loan agreement includes a zero -percent LIBOR floor. The corresponding swaps do not include such a floor. (5) The effective rate will decrease to 2.76% on March 2, 2020 . (6) These loans were closed during the twelve months ended December 31, 2019 . (7) Effective rate will increase to 3.07% on April 1, 2020 . (8) Effective rate will decrease to 2.36% on July 1, 2020 . (9) Effective rate will increase to 2.31% on July 1, 2021 . (10) Effective rate will increase to 3.25% on December 1, 2020 . (11) Requires monthly payments of principal and interest. Principal amortization is based upon a 30 -year amortization schedule. (12) In March 2019, we renewed our $400.0 million revolving credit facility, releasing two previously encumbered properties, lowering the borrowing rate and unused facility fees, and extending the maturity date. Unused commitment fees range from 0.10% to 0.15% . The loan agreement includes a zero-percent LIBOR floor. (13) A previously unconsolidated Fund is now treated as a consolidated JV. See Note 3 . (14) The table does not include our unconsolidated Funds' loans - see Note 17 . See Note 14 for our fair value disclosures. Debt Statistics The following table summarizes our consolidated fixed and floating rate debt: (In thousands) Principal Balance as of December 31, 2019 Principal Balance as of December 31, 2018 Aggregate swapped to fixed rate loans $ 4,622,400 $ 3,882,400 Aggregate fixed rate loans 30,864 31,582 Aggregate floating rate loans — 250,000 Total Debt $ 4,653,264 $ 4,163,982 The following table summarizes certain consolidated debt statistics as of December 31, 2019 : Statistics for consolidated loans with interest fixed under the terms of the loan or a swap Principal balance (in billions) $4.65 Weighted average remaining life (including extension options) 6.1 years Weighted average remaining fixed interest period 3.9 years Weighted average annual interest rate 3.00% Future Principal Payments At December 31, 2019 , the minimum future principal payments due on our consolidated secured notes payable and revolving credit facility were as follows: Year ending December 31: Excluding Maturity Extension Options Including Maturity Extension Options (1) (In thousands) 2020 $ 752 $ 752 2021 787 787 2022 300,823 823 2023 915,862 580,862 2024 800,902 1,100,902 Thereafter 2,634,138 2,969,138 Total future principal payments $ 4,653,264 $ 4,653,264 ____________________________________________ (1) Some of our loan agreements require that we meet certain minimum financial thresholds to be able to extend the loan maturity. Loan Costs Deferred loan costs are net of accumulated amortization of $30.7 million and $24.2 million at December 31, 2019 and December 31, 2018 , respectively. The table below presents loan costs, which are included in interest expense in our consolidated statements of operations: Year Ended December 31, (In thousands) 2019 2018 2017 Loan costs expensed $ 1,318 $ 58 $ 557 Deferred loan costs written off 6,865 360 1,802 Deferred loan cost amortization 7,449 7,874 9,033 Total $ 15,632 $ 8,292 $ 11,392

Interest Payable, Accounts Paya

Interest Payable, Accounts Payable and Deferred Revenue	12 Months Ended
	Dec. 31, 2019
Accounts Payable and Accrued Liabilities [Abstract]
Interest Payable, Accounts Payable and Deferred Revenue	Interest Payable, Accounts Payable and Deferred Revenue (In thousands) December 31, 2019 December 31, 2018 Interest payable $ 11,707 $ 10,657 Accounts payable and accrued liabilities 66,437 75,111 Deferred revenue 53,266 44,386 Total interest payable, accounts payable and deferred revenue $ 131,410 $ 130,154

Derivative Contracts

Derivative Contracts	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Contracts	Derivative Contracts Derivative Summary As of December 31, 2019 , 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) 43 $ 5,124,800 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) Includes forward swaps with a total notional of $502.4 million . (3) The notional amount reflects 100% , not our pro-rata share, of our unconsolidated Fund's derivatives. (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, 2019 , 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, 2019 December 31, 2018 Consolidated derivatives (1) $ 56,896 $ 1,681 Unconsolidated Fund's derivatives (2) $ — $ — ___________________________________________________ (1) Includes 100% , not our pro-rata share, of our consolidated JVs' derivatives. (2) Our unconsolidate d Fund did not have any derivatives in a liability position. 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, 2019 December 31, 2018 Consolidated derivatives (1) $ 23,275 $ 76,021 Unconsolidated Fund's derivative (2) $ 963 $ 12,576 ___________________________________________________ (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. 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, 2019 2018 2017 Derivatives Designated as Cash Flow Hedges: Consolidated derivatives: Gain recorded in AOCI - adoption of ASU 2017-12 (1) $ — $ 211 $ — (Loss) gain recorded in AOCI before reclassifications (1) $ (76,273 ) $ 22,723 $ 16,512 (Gain) loss reclassified from AOCI to Interest Expense (1) $ (24,298 ) $ (10,103 ) $ 13,976 Interest Expense presented in the consolidated statements of operations $ (143,308 ) $ (133,402 ) $ (145,176 ) Loss (gain) related to ineffectiveness recorded in Interest Expense $ — $ — $ 51 Unconsolidated Funds' derivatives (our share) (2) : (Loss) gain recorded in AOCI before reclassifications (1) $ (5,023 ) $ 3,052 $ 3,275 (Gain) loss reclassified from AOCI to Income from unconsolidated Funds (1) $ (1,698 ) $ (813 ) $ 527 Income from unconsolidated Funds presented in the consolidated statements of operations $ 6,923 $ 6,400 $ 5,905 __________________________________________________ (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, 2019 , 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 $ (2,461 ) Unconsolidated Fund's derivatives (our share): Gains to be reclassified from AOCI to Income from unconsolidated Funds $ 235

Equity

Equity	12 Months Ended
	Dec. 31, 2019
Stockholders' Equity Note [Abstract]
Equity	Equity Transactions 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 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). 2017 Transactions During 2017 , we or our Operating Partnership, (i) acquired 1.1 million OP Units in exchange for issuing an equal number of shares of our common stock to the holders of the OP Units, (ii) issued 1.3 million shares of our common stock for the exercise of 3.9 million stock options on a net settlement basis (net of the exercise price and related taxes), (iii) issued 15.7 million shares of our common stock under our ATM program for net proceeds of $593.3 million , and (iv) issued 2.6 million OP Units valued at $105.7 million in connection with the acquisition of the 9401 Wilshire office property, of which we subsequently acquired 248 thousand OP Units for $10.1 million in cash. One of our JVs acquired three office properties, 1299 Ocean Avenue, 429 Santa Monica and 9665 Wilshire, for which investors contributed $284.0 million directly to the JV. 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 29.1 million OP Units and fully-vested LTIP Units, and represented approximately 14% of our Operating Partnership's total outstanding interests as of December 31, 2019 when we owned 175.4 million OP Units (to match our 175.4 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) 2019 2018 2017 Net income attributable to common stockholders $ 363,713 $ 116,086 $ 94,443 Transfers from noncontrolling interests: Exchange of OP Units with noncontrolling interests 3,540 10,292 14,242 Repurchase of OP Units from noncontrolling interests (431 ) (59 ) (6,764 ) Net transfers from noncontrolling interests 3,109 10,233 7,478 Change from net income attributable to common stockholders and transfers from noncontrolling interests $ 366,822 $ 126,319 $ 101,921 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) 2019 2018 2017 Beginning balance $ 53,944 $ 43,099 $ 15,156 Adoption of ASU 2017-12 - cumulative opening balance adjustment — 211 — Consolidated derivatives: Other comprehensive (loss) gain before reclassifications (76,273 ) 22,723 16,512 Reclassification of (gain) loss from AOCI to Interest Expense (24,298 ) (10,103 ) 13,976 Unconsolidated Funds' derivatives (our share) (2) : Other comprehensive (loss) gain before reclassifications (5,023 ) 3,052 3,275 Reclassification of (gain) loss from AOCI to Income from unconsolidated Funds (1,698 ) (813 ) 527 Net current period OCI (107,292 ) 15,070 34,290 OCI attributable to noncontrolling interests 35,886 (4,225 ) (6,347 ) OCI attributable to common stockholders (71,406 ) 10,845 27,943 Ending balance $ (17,462 ) $ 53,944 $ 43,099 __________________________________________________ (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 2019 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 % 12/31/2018 1/15/2019 $ 0.26 51.8 % — % 48.2 % 51.8 % 3/29/2019 4/16/2019 0.26 51.8 % — % 48.2 % 51.8 % 6/28/2019 7/12/2019 0.26 51.8 % — % 48.2 % 51.8 % 9/30/2019 10/16/2019 0.26 51.8 % — % 48.2 % 51.8 % Total / Weighted Average $ 1.04 51.8 % — % 48.2 % 51.8 %

EPS

EPS	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
EPS	EPS The table below presents the calculation of basic and diluted EPS: Year Ended December 31, 2019 2018 2017 Numerator (In thousands): Net income attributable to common stockholders $ 363,713 $ 116,086 $ 94,443 Allocation to participating securities: Unvested LTIP Units (1,594 ) (546 ) (626 ) Net income attributable to common stockholders - basic and diluted $ 362,119 $ 115,540 $ 93,817 Denominator (In thousands): Weighted average shares of common stock outstanding - basic 173,358 169,893 160,905 Effect of dilutive securities: Stock options (1) — 9 325 Weighted average shares of common stock and common stock equivalents outstanding - diluted 173,358 169,902 161,230 Net income per common share - basic $ 2.09 $ 0.68 $ 0.58 Net income per common share - diluted $ 2.09 $ 0.68 $ 0.58 ____________________________________________________ (1) There were no outstanding options during the year ended December 31, 2019 . 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 following table presents the OP Units and vested LTIP Units outstanding for the respective periods: Year Ended December 31, (In thousands) 2019 2018 2017 OP Units 26,465 26,661 24,810 Vested LTIP Units 1,652 813 274

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation 2016 Omnibus Stock Incentive Plan The Douglas Emmett, Inc. 2016 Omnibus Stock Incentive Plan, 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. We had an aggregate of 1.8 million shares available for grant as of December 31, 2019 . 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 to five calendar years following the grant date, and some of these grants include a portion which vests at the date of grant. In aggregate, we granted 802 thousand , 898 thousand and 800 thousand LTIP Units to employees during 2019 , 2018 and 2017 , respectively. 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 38 thousand , 37 thousand and 28 thousand LTIP Units to our non-employee directors during 2019 , 2018 and 2017 , respectively. Compensation Expense At December 31, 2019 , the total unrecognized stock-based compensation expense for unvested LTIP Unit awards was $22.0 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) 2019 2018 2017 Stock-based compensation expense, net $ 18,359 $ 22,299 $ 18,478 Capitalized stock-based compensation $ 4,698 $ 5,006 $ 2,537 Intrinsic value of options exercised $ — $ 1,196 $ 102,963 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 Remaining Contract Life (Months) Total Intrinsic Value (Thousands) Intrinsic Value of Options Exercised (Thousands) Outstanding at December 31, 2016 3,969 $ 12.43 27 $ 95,770 Exercised (3,920 ) $ 12.43 $ 102,963 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 outstanding options during the year ended December 31, 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, 2016 1,040 $ 23.46 Granted 828 $ 29.89 $ 24,745 Vested (807 ) $ 25.40 $ 20,497 Forfeited (5 ) $ 31.36 $ 172 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

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2019
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, 2019 , 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 excludes 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, 2019 December 31, 2018 Fair value $ 4,678,623 $ 4,087,979 Carrying value $ 4,653,264 $ 4,062,968 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, 2019 Fair value $ 12,218 Carrying value $ 10,882 Financial instruments measured at fair value Derivative instruments: See Note 10 for the details of our derivatives. We present our derivatives on the balance sheet 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, 2019 December 31, 2018 Derivative Assets: Fair value - c onsolidated derivatives (1) $ 22,381 $ 73,414 Fair value - unconsolidated Funds' derivatives (2) $ 889 $ 12,228 Derivative Liabilities: Fair value - c onsolidated derivatives (1) $ 54,616 $ 1,530 Fair value - unconsolidated Funds' derivatives (2) $ — $ — ___________________________________________________________________________________ (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) Reflects 100% , not our pro-rata share, of our unconsolidated Funds' derivatives. Our pro-rata share of the amounts related to the unconsolidated Funds' derivatives is included in our Investment in unconsolidated Funds in our consolidated balance sheets. See Note 17 regarding our unconsolidated Funds debt and derivatives. Our unconsolidate d Funds' did not have any derivatives in a liability position for the periods presented.

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2019
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, 2019 2018 2017 Office Segment Total office revenues $ 816,755 $ 777,931 $ 715,546 Office expenses (264,482 ) (252,751 ) (233,633 ) Office segment profit 552,273 525,180 481,913 Multifamily Segment Total multifamily revenues 119,927 103,385 96,506 Multifamily expenses (33,681 ) (28,116 ) (24,401 ) Multifamily segment profit 86,246 75,269 72,105 Total profit from all segments $ 638,519 $ 600,449 $ 554,018 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, 2019 2018 2017 Total profit from all segments $ 638,519 $ 600,449 $ 554,018 General and administrative expenses (38,068 ) (38,641 ) (36,234 ) Depreciation and amortization (357,743 ) (309,864 ) (276,761 ) Other income 11,653 11,414 9,712 Other expenses (7,216 ) (7,744 ) (7,037 ) Income from unconsolidated Funds 6,923 6,400 5,905 Interest expense (143,308 ) (133,402 ) (145,176 ) Gain from consolidation of JV 307,938 — — Net income 418,698 128,612 104,427 Less: Net income attributable to noncontrolling interests (54,985 ) (12,526 ) (9,984 ) Net income attributable to common stockholders $ 363,713 $ 116,086 $ 94,443

Future Minimum Lease Rental Rec

Future Minimum Lease Rental Receipts	12 Months Ended
	Dec. 31, 2019
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 at December 31, 2019 : Year Ending December 31, (In thousands) 2020 $ 658,016 2021 572,372 2022 484,611 2023 384,866 2024 294,137 Thereafter 691,145 Total future minimum base rentals (1) $ 3,085,147 _____________________________________________________ (1) Does not include (i) residential leases, which typically have a term of one year or less, (ii) holdover rent, (ii) 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, 2019
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 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. In 2019 , 2018 and 2017 , no tenant accounted for more than 10% of our total revenues. See Note 2 for the details of our allowances for tenant receivables and deferred rent receivables. 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. 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. 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. 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, 2019 , 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, 2019 , 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. We expect construction to take about three years . In downtown Honolulu, at 1132 Bishop Street, we are converting a 25 story, 490,000 square foot office tower into approximately 500 apartments. We expect the conversion to occur in phases over a number of years as the office space is vacated. As of December 31, 2019 , we had an aggregate remaining contractual commitment for these development projects of approximately $233.3 million . As of December 31, 2019 , we had an aggregate remaining contractual commitment for repositionings, capital expenditure projects and tenant improvements of approximately $24.6 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, 2019 , 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, 2019 . The amounts represent 100% (not our pro-rata share) of the amounts related to our Funds: Fund (1) Loan Maturity Date Principal Balance (In thousands) 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, 2019 , assuming a zero -percent LIBOR interest rate during the remaining life of the swap, the maximum future payments under the swap agreement were $1.2 million . (3) Loan agreement includes a zero -percent LIBOR floor. The corresponding swap does not include such a floor.

Quarterly Financial Information

Quarterly Financial Information (unaudited)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information (unaudited)	Quarterly Financial Information (unaudited) The tables below present selected quarterly information for 2019 and 2018 : Three Months Ended (In thousands, except per share amounts) March 31, June 30, 2019 September 30, 2019 December 31, 2019 Total revenue $ 224,186 $ 230,534 $ 238,069 $ 243,893 Net income before noncontrolling interests $ 32,788 $ 39,860 $ 23,421 $ 322,629 Net income attributable to common stockholders $ 28,701 $ 33,966 $ 22,488 $ 278,558 Net income per common share - basic $ 0.17 $ 0.20 $ 0.13 $ 1.58 Net income per common share - diluted $ 0.17 $ 0.20 $ 0.13 $ 1.58 Weighted average shares of common stock outstanding - basic 170,221 172,498 175,278 175,356 Weighted average shares of common stock and common stock equivalents outstanding - diluted 170,221 172,498 175,278 175,356 Three Months Ended (In thousands, except per share amounts) March 31, June 30, 2018 September 30, 2018 December 31, 2018 Total revenue $ 212,247 $ 219,469 $ 223,308 $ 226,292 Net income before noncontrolling interests $ 32,631 $ 37,033 $ 35,416 $ 23,532 Net income attributable to common stockholders $ 28,206 $ 31,684 $ 30,561 $ 25,635 Net income per common share - basic $ 0.17 $ 0.19 $ 0.18 $ 0.15 Net income per common share - diluted $ 0.17 $ 0.19 $ 0.18 $ 0.15 Weighted average shares of common stock outstanding - basic 169,601 169,916 169,926 170,121 Weighted average shares of common stock and common stock equivalents outstanding - diluted 169,625 169,926 169,931 170,121

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In January 2020, there was a fire in one of our buildings at our Barrington Plaza apartment property. We carry comprehensive liability and property insurance covering all of the properties in our portfolio under blanket insurance policies and we do not currently expect the event to have a material impact on our financial position and results of operations.

Schedule III - Consolidated Rea

Schedule III - Consolidated Real Estate and Accumulated Depreciation and Amortization	12 Months Ended
	Dec. 31, 2019
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 (5) Accumulated Depreciation & Amortization Year Built / Renovated Year Acquired Office Properties 100 Wilshire $ 252,034 $ 12,769 $ 78,447 $ 151,175 $ 27,108 $ 215,283 $ 242,391 $ 73,429 1968/2002/2019 1999 233 Wilshire 62,962 9,263 130,426 3,549 9,263 133,975 143,238 14,268 1975/2008-2009 2016 401 Wilshire — 9,989 29,187 129,932 21,787 147,321 169,108 47,259 1981/2000/2019 1996 429 Santa Monica 33,691 4,949 72,534 3,086 4,949 75,620 80,569 6,978 1982/2016 2017 1132 Bishop Street — 8,317 105,651 55,172 8,833 160,307 169,140 87,669 1992 2004 1299 Ocean 124,699 22,748 265,198 15,300 22,748 280,498 303,246 22,015 1980/2006/2019 2017 1901 Avenue of the Stars — 18,514 131,752 114,260 26,163 238,363 264,526 86,611 1968/2001 2001 2001 Wilshire (4) 36,000 5,711 81,622 151 5,711 81,773 87,484 273 1980/2013 2008 8383 Wilshire (4) 138,000 18,005 328,118 695 18,005 328,813 346,818 1,076 1971/2009 2008 8484 Wilshire (1) — 8,846 77,780 16,101 8,846 93,881 102,727 21,021 1972/2013 2013 9100 Wilshire (4) 115,000 13,455 258,329 518 13,455 258,847 272,302 807 1971/2016 2008 9401 Wilshire 30,864 6,740 152,310 12,743 6,740 165,053 171,793 10,617 1971/2019 2017 9601 Wilshire — 16,597 54,774 105,395 17,658 159,108 176,766 57,708 1962/2004 2001 9665 Wilshire 77,445 5,568 177,072 18,550 5,568 195,622 201,190 12,887 1971/2019 2017 10880 Wilshire 198,794 29,995 437,514 31,763 29,988 469,284 499,272 53,543 1970/2009/2019 2016 10960 Wilshire 201,893 45,844 429,769 27,072 45,852 456,833 502,685 54,210 1971/2006 2016 11777 San Vicente 44,412 5,032 15,768 29,600 6,714 43,686 50,400 16,119 1974/1998 1999 12100 Wilshire 101,203 20,164 208,755 8,255 20,164 217,010 237,174 26,206 1985 2016 12400 Wilshire — 5,013 34,283 76,442 8,828 106,910 115,738 38,680 1985 1996 15250 Ventura (4) 26,000 2,130 48,907 139 2,130 49,046 51,176 211 1970/2012 2008 16000 Ventura (4) 42,000 1,936 89,531 301 1,936 89,832 91,768 325 1980/2011 2008 16501 Ventura 42,944 6,759 53,112 11,387 6,759 64,499 71,258 15,359 1986/2012 2013 Beverly Hills Medical Center — 4,955 27,766 28,814 6,435 55,100 61,535 20,186 1964/2004 2004 Bishop Square 200,000 16,273 213,793 31,072 16,273 244,865 261,138 70,903 1972/1983 2010 Brentwood Court — 2,564 8,872 524 2,563 9,397 11,960 3,653 1984 2006 Brentwood Executive Plaza — 3,255 9,654 32,710 5,921 39,698 45,619 14,519 1983/1996 1995 Brentwood Medical Plaza — 5,934 27,836 1,285 5,933 29,122 35,055 11,088 1975 2006 Brentwood San Vicente Medical — 5,557 16,457 1,180 5,557 17,637 23,194 6,782 1957/1985 2006 Brentwood/Saltair — 4,468 11,615 11,766 4,775 23,074 27,849 8,845 1986 2000 Bundy/Olympic — 4,201 11,860 29,078 6,030 39,109 45,139 14,450 1991/1998 1994 Camden Medical Arts 42,276 3,102 12,221 27,853 5,298 37,878 43,176 13,704 1972/1992 1995 Carthay Campus — 6,595 70,454 6,241 6,594 76,696 83,290 15,396 1965/2008 2014 Century Park Plaza 173,000 10,275 70,761 132,532 16,153 197,415 213,568 60,946 1972/1987/2019 1999 Century Park West (1) — 3,717 29,099 (1,050 ) 3,667 28,099 31,766 10,038 1971 2007 Columbus Center — 2,096 10,396 9,569 2,333 19,728 22,061 7,439 1987 2001 Coral Plaza — 4,028 15,019 18,918 5,366 32,599 37,965 12,051 1981 1998 Cornerstone Plaza (1) — 8,245 80,633 7,135 8,263 87,750 96,013 30,052 1986 2007 Encino Gateway — 8,475 48,525 55,246 15,653 96,593 112,246 35,614 1974/1998 2000 Encino Plaza — 5,293 23,125 47,991 6,165 70,244 76,409 26,809 1971/1992 2000 Encino Terrace 105,565 12,535 59,554 94,108 15,533 150,664 166,197 53,418 1986 1999 Executive Tower (1) — 6,660 32,045 59,549 9,471 88,783 98,254 34,753 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 (5) Accumulated Depreciation & Amortization Year Built / Renovated Year Acquired Office Properties (continued) First Financial Plaza 54,077 12,092 81,104 3,635 12,092 84,739 96,831 13,474 1986 2015 Gateway Los Angeles — 2,376 15,302 49,327 5,119 61,886 67,005 23,283 1987 1994 Harbor Court — 51 41,001 48,087 12,060 77,079 89,139 24,518 1994 2004 Honolulu Club — 1,863 16,766 5,896 1,863 22,662 24,525 9,089 1980 2008 Landmark II — 6,086 109,259 67,669 13,070 169,944 183,014 61,622 1989 1997 Lincoln/Wilshire — 3,833 12,484 23,598 7,475 32,440 39,915 10,883 1996 2000 MB Plaza — 4,533 22,024 33,600 7,503 52,654 60,157 18,784 1971/1996 1998 Olympic Center 52,000 5,473 22,850 34,804 8,247 54,880 63,127 19,807 1985/1996 1997 One Westwood (1) — 10,350 29,784 63,393 9,194 94,333 103,527 34,093 1987/2004 1999 Palisades Promenade — 5,253 15,547 54,541 9,664 65,677 75,341 23,435 1990 1995 Saltair/San Vicente 21,533 5,075 6,946 16,739 7,557 21,203 28,760 8,044 1964/1992 1997 San Vicente Plaza — 7,055 12,035 (61 ) 7,055 11,974 19,029 4,798 1985 2006 Santa Monica Square 48,500 5,366 18,025 21,723 6,863 38,251 45,114 13,974 1983/2004 2001 Second Street Plaza — 4,377 15,277 36,308 7,421 48,541 55,962 17,963 1991 1997 Sherman Oaks Galleria 300,000 33,213 17,820 410,836 48,328 413,541 461,869 150,971 1981/2002 1997 Studio Plaza — 9,347 73,358 122,044 15,015 189,734 204,749 68,366 1988/2004 1995 The Tower 65,969 9,643 160,602 4,196 9,643 164,798 174,441 20,889 1988/1998 2016 The Trillium (1) — 20,688 143,263 85,509 21,989 227,471 249,460 80,180 1988 2005 Valley Executive Tower 104,000 8,446 67,672 104,500 11,737 168,881 180,618 60,805 1984 1998 Valley Office Plaza — 5,731 24,329 46,172 8,957 67,275 76,232 24,902 1966/2002 1998 Verona — 2,574 7,111 15,131 5,111 19,705 24,816 7,106 1991 1997 Village on Canon 61,745 5,933 11,389 50,012 13,303 54,031 67,334 19,444 1989/1995 1994 Warner Center Towers 335,000 43,110 292,147 421,607 59,418 697,446 756,864 256,107 1982-1993/2004 2002 Warner Corporate Center (4) 43,000 11,035 65,799 335 11,035 66,134 77,169 298 1988/2015 2008 Westside Towers 141,915 8,506 79,532 82,034 14,568 155,504 170,072 56,383 1985 1998 Westwood Center 113,343 9,512 259,341 12,344 9,513 271,684 281,197 33,966 1965/2000 2016 Westwood Place 71,000 8,542 44,419 52,040 11,448 93,553 105,001 33,866 1987 1999 Multifamily Properties 555 Barrington 50,000 6,461 27,639 40,435 14,903 59,632 74,535 21,850 1989 1999 Barrington Plaza 210,000 28,568 81,485 153,858 58,208 205,703 263,911 75,202 1963/1998 1998 Barrington/Kiowa 13,940 5,720 10,052 656 5,720 10,708 16,428 3,979 1974 2006 Barry 11,370 6,426 8,179 549 6,426 8,728 15,154 3,340 1973 2006 Kiowa 5,470 2,605 3,263 421 2,605 3,684 6,289 1,378 1972 2006 Moanalua Hillside Apartments 255,000 24,791 157,353 119,348 35,365 266,127 301,492 47,725 1968/2004/2019 2005 Pacific Plaza 78,000 10,091 16,159 74,021 27,816 72,455 100,271 25,820 1963/1998 1999 The Glendon 160,000 32,773 335,925 467 32,775 336,390 369,165 6,028 2008 2019 The Shores 212,000 20,809 74,191 199,491 60,555 233,936 294,491 82,309 1965-67/2002 1999 Villas at Royal Kunia 94,220 42,887 71,376 14,961 35,163 94,061 129,224 38,965 1990/1995 2006 Waena Apartments 102,400 26,864 119,273 1,502 26,864 120,775 147,639 16,852 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 (5) Accumulated Depreciation & Amortization Year Built / Renovated Year Acquired Ground Lease Owensmouth/Warner (1) — 23,848 — — 23,848 — 23,848 — N/A 2006 Total Operating Properties $ 4,653,264 $ 878,478 $ 6,610,605 $ 3,877,835 $ 1,152,684 $ 10,214,234 $ 11,366,918 $ 2,518,415 Property Under Development 1132 Bishop Street Conversion $ — $ — $ — $ 16,818 $ — $ 16,818 $ 16,818 $ — N/A N/A Landmark II Development — 13,070 — 79,703 13,070 79,703 92,773 — N/A N/A Other Developments — — — 2,124 — 2,124 2,124 — N/A N/A Total Property Under Development $ — $ 13,070 $ — $ 98,645 $ 13,070 $ 98,645 $ 111,715 $ — Total $ 4,653,264 $ 891,548 $ 6,610,605 $ 3,976,480 $ 1,165,754 $ 10,312,879 $ 11,478,633 $ 2,518,415 _____________________________________________________ (1) These properties are encumbered by our revolving credit facility, which had a zero balance as of December 31, 2019 . (2) Includes tenant improvements and lease intangibles. (3) Net of fully depreciated and amortized tenant improvements and lease intangibles removed from our books. (4) A previously unconsolidated Fund is now treated as a consolidated JV. (5) At December 31, 2019 , the aggregate federal income tax cost basis for consolidated real estate was $7.91 billion (unaudited). The table below presents a reconciliation of our investment in real estate: Year Ended December 31, 2019 2018 2017 Investment in real estate, gross Beginning balance $ 10,030,708 $ 9,829,208 $ 8,998,120 Property acquisitions 368,698 — 707,120 Consolidation of JV 924,578 — — Improvements and developments 242,854 277,229 177,655 Removal of fully depreciated and amortized tenant improvements and lease intangibles (88,205 ) (75,729 ) (53,687 ) Ending balance $ 11,478,633 $ 10,030,708 $ 9,829,208 Accumulated depreciation and amortization Beginning balance $ (2,246,887 ) $ (2,012,752 ) $ (1,789,678 ) Depreciation and amortization (357,743 ) (309,864 ) (276,761 ) Other accumulated depreciation and amortization (1,990 ) — — Removal of fully depreciated and amortized tenant improvements and lease intangibles 88,205 75,729 53,687 Ending balance $ (2,518,415 ) $ (2,246,887 ) $ (2,012,752 ) Investment in real estate, net $ 8,960,218 $ 7,783,821 $ 7,816,456

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
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. 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	Real Estate Held for Sale
Dispositions	Dispositions
Cost Capitalization	Cost capitalization
Ground Leases	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, see New Accounting Pronouncements further below. 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
Investment in Unconsolidated Funds	Investment in Unconsolidated Funds
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets
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, see New Accounting Pronouncements further below. 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. Deferred rent receivables represent rental revenue recognized on a straight-line basis in excess of billed rents. If a lease is canceled then the deferred rent is recognized over the new remaining lease term. We recognized straight line rent of $10.1 million , $18.8 million and $12.9 million during 2019 , 2018 and 2017 , respectively. 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 $0.5 million , $1.6 million and $2.1 million during 2019 , 2018 and 2017 , 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 $5.8 million , $3.5 million and $2.6 million during 2019 , 2018 and 2017 , 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, if collectibility of the lease payments is not probable at the commencement date, then we limit the lease income to the lesser of the income recognized on a straight-line basis or cash basis. If our assessment of collectibility changes after the commencement date, we 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 lease income. We elected to adopt the complete impairment model guidance within Topic 842. Under this model, commencing on January 1, 2019, we no longer maintain a general reserve related to our receivables, and instead analyze, on a lease-by-lease basis, whether amounts due under the operating lease are deemed probable for collection. We write off tenant and deferred rent receivables as a charge against rental revenue in the period we determine the lease payments are not probable for collection.
Office Parking Revenues	Office Parking Revenues
Insurance Recoveries	Insurance Recoveries Insurance recoveries related to property damage are recorded as other income when payment is either received or receipt is determined to be probable.
Interest Income	Interest Income
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, see New Accounting Pronouncements further below. 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. 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 balance sheet. 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 Compensation
EPS	EPS
Segment Information	Segment Information Segment information is prepared on the same basis that our management reviews information for operational decision-making purposes. We operate two
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. We have elected to treat several of our subsidiaries as TRSs, 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 2019 , 2018 or 2017 . 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	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 during we expect to be applicable and have a material impact on our consolidated financial statements. ASUs Adopted During 2019 we adopted the ASU listed below: ASU 2016-02 (Topic 842 - "Leases") In February 2016, the FASB issued ASU No. 2016-02, (Topic 842 - "Leases"). The primary impact of the ASU is the recognition of lease assets and liabilities on the balance sheet by lessees for leases classified as operating leases. The accounting applied by lessors is largely unchanged. For example, the vast majority of operating leases remain classified as operating leases, and lessors continue to recognize lease payments for those leases on a straight-line basis over the lease term. We adopted the ASU on January 1, 2019 using the modified retrospective transition method. We recorded cumulative adjustments of $2.1 million and $0.4 million to the opening balances of accumulated deficit and noncontrolling interests, respectively, for leasing expenses related to leases that were entered into before the adoption date but commenced after the adoption date. The ASU provides a practical expedient package, which we elected to use, that allows entities (a) not to reassess whether any expired or existing contracts as of the adoption date are considered or contain leases; (b) not to reassess the lease classification for any expired or existing leases as of the adoption date; and (c) not to reassess initial direct costs for any existing leases as of the adoption date. All leases entered into on or after the adoption date were accounted for under the ASU. We lease space to tenants at our office and multifamily properties. Under the ASU, all of our tenant leases continue to be classified as operating leases. The ASU continues to require that lease payments for operating leases be recognized over the lease term on a straight-line basis unless another systematic and rational basis is more representative of the pattern in which benefit is expected to be derived from the use of the underlying asset. If collectibility of the lease payments is not probable at the commencement date, then the lease income should be limited to the lesser of the income recognized on a straight-line basis or cash basis. If the assessment of collectibility changes after the commencement date, any difference between the lease income that would have been recognized on a straight-line basis and cash basis must be recognized as a current-period adjustment to lease income. We elected to adopt the complete impairment model guidance within ASC 842. Under this model we no longer maintain a general reserve related to our receivables, and instead analyze, on a lease-by-lease basis, whether amounts due under the operating lease are deemed probable for collection. We write off tenant and deferred rent receivables as a charge against rental revenue in the period we determine the lease payments are not probable for collection. The ASU requires separation of the lease from the non-lease components (for example, maintenance services or other activities that transfer a good or service to the customer) in a contract. Only the lease components are accounted for in accordance with the ASU. The consideration in the contract is allocated to the lease and non-lease components on a relative standalone selling price basis and the non-lease component would be accounted for in accordance with ASC 606 ("Revenue from Contracts with Customers"). In July 2018, the FASB issued ASU No. 2018-11 which includes an optional practical expedient for lessors to elect, by class of underlying asset, to not separate the lease from the non-lease components if certain criteria are met. Our office tenant leases include a lease component for the rental income and a non-lease component for the related tenant recoveries. We determined that our office tenant leases qualify for the single component presentation and we adopted the practical expedient. We account for the combined components under the ASU. Rental revenues and tenant recoveries from our office tenant leases is included in Rental revenues and tenant recoveries under Office rental in our consolidated statements of operations. Rental revenues from our multifamily tenant leases is included in multifamily Rental revenues in our consolidated statements of operations. Rental revenue recognized on a straight-line basis in excess of billed rents is included in Deferred rent receivables in our consolidated balance sheets. See Note 16 for more information regarding the future lease rental receipts from our operating leases. The ASU defines initial direct costs of a lease, which may be capitalized, as 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 may not be capitalized. We historically capitalized most of our leasing costs. We expensed $4.2 million during the year ended December 31, 2019 , of leasing costs related to our tenant leases that did not qualify as initial direct costs of a lease, which are included in General and administrative expenses in our consolidated statements of operations. We pay rent under a ground lease which expires on December 31, 2086 . 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. In December 2018, the FASB issued ASU 2018-20, an update to ASU 2016-02, which provides guidance on accounting for sales and other similar taxes collected from lessees, certain lessor costs, and recognition of variable payments for contracts with lease and nonlease components. We adopted the ASU and it did not have a material impact on our consolidated financial statements. In March 2019, the FASB issued ASU 2019-01, an update to ASU 2016-02, which provides guidance on transition disclosures related to Topic 250 "Accounting Changes and Error Corrections" and other technical updates. We adopted the ASU and it did not have a material impact on our consolidated financial statements. ASUs Not Yet 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 would be the first quarter of 2020, and early adoption is permitted. The amendments in this ASU should be applied retrospectively. The ASU would impact our measurement of credit losses for our Office parking receivables, which were $1.3 million and $1.1 million as of December 31, 2019 and 2018 , respectively, and are included in Tenant receivables in our consolidated balance sheets. We expect to adopt the ASU in the first quarter of 2020 and we do not expect the ASU to 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. Level 3 - inputs are unobservable assumptions generated by the reporting entity

Overview (Tables)

Overview (Tables)	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Real Estate Properties	As of December 31, 2019 , 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 17 17 Unconsolidated Fund properties — 2 70 72 Multifamily Wholly-owned properties 10 10 Consolidated JV properties 1 1 11 11 Total 81 83

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Schedule of Tenant Receivables and Deferred Rent Receivables	The table below presents our allowances and security obtained from our tenants before we adopted Topic 842: (In thousands) December 31, 2018 Allowance for tenant receivables $ 5,215 Allowance for deferred rent receivables $ 2,849 Letters of credit from our tenants $ 27,749 Cash security deposits from our tenants $ 50,733 The table below presents the impact of the changes in our allowances on our results of operations: Year Ended December 31, (In thousands) 2018 2017 Tenant receivables allowance - decrease in net income $ (2,154 ) $ (406 ) Deferred rent receivables allowance - increase in net income $ 556 $ 1,739

Investment in Real Estate (Tabl

Investment in Real Estate (Tables)	12 Months Ended
	Dec. 31, 2019
Asset Acquisition [Abstract]
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) 1299 Ocean 429 Santa Monica 9665 Wilshire 9401 Wilshire (1) Submarket Santa Monica Santa Monica Beverly Hills Beverly Hills Acquisition date April 25 April 25 July 20 December 20 Contract price $ 275,800 $ 77,000 $ 177,000 $ 143,647 Building square footage 206 87 171 146 Investment in real estate: Land $ 22,748 $ 4,949 $ 5,568 $ 6,740 Buildings and improvements 260,188 69,286 175,960 144,467 Tenant improvements and lease intangibles 5,010 3,248 1,112 7,843 Acquired above- and below-market leases, net (10,683 ) (722 ) (4,339 ) (11,559 ) Assumed debt (2) — — — (36,460 ) Net assets and liabilities acquired $ 277,263 $ 76,761 $ 178,301 $ 111,031 _____________________________________________________ (1) We issued OP Units to the seller in connection with the acquisition of 9401 Wilshire. See Note 11 for more information. (2) We assumed a loan from the seller in connection with the acquisition of 9401 Wilshire. At the date of acquisition, the loan had a fair value of $36.5 million and a principal balance of $32.3 million . See Note 8 for more information. (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, 2019
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, 2019 : Year ending December 31: (In thousands) 2020 $ 733 2021 733 2022 733 2023 733 2024 733 Thereafter 45,445 Total future minimum lease payments $ 49,110

Acquired Lease Intangibles (Tab

Acquired Lease Intangibles (Tables)	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Acquired Lease Intangibles	Summary of our Acquired Lease Intangibles (In thousands) December 31, 2019 December 31, 2018 Above-market tenant leases $ 7,220 $ 5,595 Above-market tenant leases - accumulated amortization (1,741 ) (3,289 ) Above-market ground lease where we are the lessor 1,152 1,152 Above-market ground lease - accumulated amortization (224 ) (207 ) Acquired lease intangible assets, net $ 6,407 $ 3,251 Below-market tenant leases $ 102,583 $ 112,175 Below-market tenant leases - accumulated accretion (50,216 ) (63,013 ) Above-market ground lease where we are the tenant (1) — 4,017 Above-market ground lease - accumulated accretion (1) — (610 ) Acquired lease intangible liabilities, net $ 52,367 $ 52,569 ___________________________________________________ (1) 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 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) 2019 2018 2017 Net accretion of above- and below-market tenant lease assets and liabilities (1) $ 16,282 $ 21,992 $ 17,973 Amortization of an above-market ground lease asset (2) (18 ) (17 ) (17 ) Accretion of an above-market ground lease liability (3) — 50 50 Total $ 16,264 $ 22,025 $ 18,006 _______________________________________________________________________________________ (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, 2019 . Year ending December 31: Net increase to revenues (In thousands) 2020 $ 15,339 2021 9,371 2022 6,674 2023 4,576 2024 3,702 Thereafter 6,298 Total $ 45,960

Investments in Unconsolidated_2

Investments in Unconsolidated Funds (Tables)	12 Months Ended
	Dec. 31, 2019
Real Estate Investments, Net [Abstract]
Summary of Statement of Operations for Investments in Unconsolidated Real Estate Funds and Cash Received from 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 acquired book value: (In thousands) December 31, 2019 December 31, 2018 Total assets (1) $ 136,479 $ 694,713 Total liabilities (1) $ 113,330 $ 525,483 Total equity (1) $ 23,149 $ 169,230 _______________________________________________ (1) The balances as of December 31, 2019 reflect the balances for Partnership X. The balances as of December 31, 2018 reflect the combined balances for Partnership X, Fund X and the Opportunity Fund. Year Ended December 31, (In thousands) 2019 2018 2017 Total revenues (1) $ 75,952 $ 79,590 $ 75,896 Operating income (1) $ 22,269 $ 22,959 $ 20,640 Net income (1) $ 7,350 $ 6,260 $ 5,085 _________________________________________________ (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, 2019. Year Ended December 31, (In thousands) 2019 2018 2017 Operating distributions received (1) $ 6,820 $ 6,400 $ 5,905 Capital distributions received (1) 5,853 7,349 43,560 Total distributions received (1) $ 12,673 $ 13,749 $ 49,465

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Other Assets [Abstract]
Schedule of Other Assets	(In thousands) December 31, 2019 December 31, 2018 Restricted cash $ 121 $ 121 Prepaid expenses 8,711 7,830 Other indefinite-lived intangibles 1,988 1,988 Furniture, fixtures and equipment, net 2,368 1,101 Other 3,233 3,719 Total other assets $ 16,421 $ 14,759

Secured Notes Payable and Rev_2

Secured Notes Payable and Revolving Credit Facility, Net (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Secured Notes Payable and Revolving Credit Facility	Description Maturity Date (1) Principal Balance as of December 31, 2019 Principal Balance as of December 31, 2018 Variable Interest Rate Fixed Interest Rate (2) Swap Maturity Date (In thousands) Wholly-Owned Subsidiaries Fannie Mae loan (3) — $ — $ 145,000 — — — Fannie Mae loan (3) — — 115,000 — — — Term loan (3) — — 220,000 — — — Term loan (3) — — 340,000 — — — Term loan (3) — — 400,000 — — — Term loan (3) — — 180,000 — — — Term loan (3) — — 360,000 — — — Term loan (4) 1/1/2024 300,000 300,000 LIBOR + 1.55% 3.46% 1/1/2022 Term loan (4) 3/3/2025 335,000 335,000 LIBOR + 1.30% 3.84% 3/1/2023 Fannie Mae loan (4)(5) 4/1/2025 102,400 102,400 LIBOR + 1.25% 2.84% 3/1/2023 Term loan (4)(6)(7) 8/15/2026 415,000 — LIBOR + 1.10% 2.58% 8/1/2025 Term loan (4)(6) 9/19/2026 400,000 — LIBOR + 1.15% 2.44% 9/1/2024 Term loan (4)(6)(8) 9/26/2026 200,000 — LIBOR + 1.20% 2.77% 10/1/2024 Term loan (4)(6)(9) 11/1/2026 400,000 — LIBOR + 1.15% 2.18% 10/1/2024 Fannie Mae loan (4) 6/1/2027 550,000 550,000 LIBOR + 1.37% 3.16% 6/1/2022 Fannie Mae loan (4)(6) 6/1/2029 255,000 — LIBOR + 0.98% 3.26% 6/1/2027 Fannie Mae loan (4)(6)(10) 6/1/2029 125,000 — LIBOR + 0.98% 2.55% 6/1/2027 Term loan (11) 6/1/2038 30,864 31,582 N/A 4.55% N/A Revolving credit facility (12) 8/21/2023 — 105,000 LIBOR + 1.15% N/A N/A Total Wholly-Owned Subsidiary Debt 3,113,264 3,183,982 Consolidated JVs Term loan (4) 2/28/2023 580,000 580,000 LIBOR + 1.40% 2.37% 3/1/2021 Term loan (4)(13) 7/1/2024 400,000 — LIBOR + 1.65% 3.44% 7/1/2022 Term loan (4) 12/19/2024 400,000 400,000 LIBOR + 1.30% 3.47% 1/1/2023 Term loan (4)(6) 6/1/2029 160,000 — LIBOR + 0.98% 3.25% 7/1/2027 Total Consolidated Debt (14) 4,653,264 4,163,982 Unamortized loan premium, net 6,741 3,986 Unamortized deferred loan costs, net (40,947 ) (33,938 ) Total Consolidated Debt, net $ 4,619,058 $ 4,134,030 _____________________________________________________ Except as noted below, each loan (including our revolving credit facility) is non-recourse and secured by one or more separate collateral pools consisting of one or more properties, and requires monthly payments of interest only with the outstanding principal due upon maturity. Certain of our loans require us to pay down the loan if necessary for the properties involved to meet minimum financial thresholds, although we have never had to make such a payment. (1) Maturity dates include the effect of extension options. (2) 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) At December 31, 2019 , these loans have been paid off. (4) Loan agreement includes a zero -percent LIBOR floor. The corresponding swaps do not include such a floor. (5) The effective rate will decrease to 2.76% on March 2, 2020 . (6) These loans were closed during the twelve months ended December 31, 2019 . (7) Effective rate will increase to 3.07% on April 1, 2020 . (8) Effective rate will decrease to 2.36% on July 1, 2020 . (9) Effective rate will increase to 2.31% on July 1, 2021 . (10) Effective rate will increase to 3.25% on December 1, 2020 . (11) Requires monthly payments of principal and interest. Principal amortization is based upon a 30 -year amortization schedule. (12) In March 2019, we renewed our $400.0 million revolving credit facility, releasing two previously encumbered properties, lowering the borrowing rate and unused facility fees, and extending the maturity date. Unused commitment fees range from 0.10% to 0.15% . The loan agreement includes a zero-percent LIBOR floor. (13) A previously unconsolidated Fund is now treated as a consolidated JV. See Note 3 . (14) The table does not include our unconsolidated Funds' loans - see Note 17 . See Note 14 for our fair value disclosures. Debt Statistics The following table summarizes our consolidated fixed and floating rate debt: (In thousands) Principal Balance as of December 31, 2019 Principal Balance as of December 31, 2018 Aggregate swapped to fixed rate loans $ 4,622,400 $ 3,882,400 Aggregate fixed rate loans 30,864 31,582 Aggregate floating rate loans — 250,000 Total Debt $ 4,653,264 $ 4,163,982 The following table summarizes certain consolidated debt statistics as of December 31, 2019 : Statistics for consolidated loans with interest fixed under the terms of the loan or a swap Principal balance (in billions) $4.65 Weighted average remaining life (including extension options) 6.1 years Weighted average remaining fixed interest period 3.9 years Weighted average annual interest rate 3.00%
Schedule of Minimum Future Principal Payments	At December 31, 2019 , the minimum future principal payments due on our consolidated secured notes payable and revolving credit facility were as follows: Year ending December 31: Excluding Maturity Extension Options Including Maturity Extension Options (1) (In thousands) 2020 $ 752 $ 752 2021 787 787 2022 300,823 823 2023 915,862 580,862 2024 800,902 1,100,902 Thereafter 2,634,138 2,969,138 Total future principal payments $ 4,653,264 $ 4,653,264 ____________________________________________ (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 costs, which are included in interest expense in our consolidated statements of operations: Year Ended December 31, (In thousands) 2019 2018 2017 Loan costs expensed $ 1,318 $ 58 $ 557 Deferred loan costs written off 6,865 360 1,802 Deferred loan cost amortization 7,449 7,874 9,033 Total $ 15,632 $ 8,292 $ 11,392

Interest Payable, Accounts Pa_2

Interest Payable, Accounts Payable and Deferred Revenue (Tables)	12 Months Ended
	Dec. 31, 2019
Accounts Payable and Accrued Liabilities [Abstract]
Schedule of Interest Payable, Accounts Payable and Deferred Revenue	(In thousands) December 31, 2019 December 31, 2018 Interest payable $ 11,707 $ 10,657 Accounts payable and accrued liabilities 66,437 75,111 Deferred revenue 53,266 44,386 Total interest payable, accounts payable and deferred revenue $ 131,410 $ 130,154

Derivative Contracts (Tables)

Derivative Contracts (Tables)	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Swap Derivatives	As of December 31, 2019 , 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) 43 $ 5,124,800 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) Includes forward swaps with a total notional of $502.4 million . (3) The notional amount reflects 100% , not our pro-rata share, of our unconsolidated Fund's derivatives. (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, 2019 December 31, 2018 Consolidated derivatives (1) $ 56,896 $ 1,681 Unconsolidated Fund's derivatives (2) $ — $ — ___________________________________________________ (1) Includes 100% , not our pro-rata share, of our consolidated JVs' derivatives. (2) Our unconsolidate d Fund did not have any derivatives in a liability position.
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, 2019 December 31, 2018 Consolidated derivatives (1) $ 23,275 $ 76,021 Unconsolidated Fund's derivative (2) $ 963 $ 12,576 ___________________________________________________ (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.
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, 2019 2018 2017 Derivatives Designated as Cash Flow Hedges: Consolidated derivatives: Gain recorded in AOCI - adoption of ASU 2017-12 (1) $ — $ 211 $ — (Loss) gain recorded in AOCI before reclassifications (1) $ (76,273 ) $ 22,723 $ 16,512 (Gain) loss reclassified from AOCI to Interest Expense (1) $ (24,298 ) $ (10,103 ) $ 13,976 Interest Expense presented in the consolidated statements of operations $ (143,308 ) $ (133,402 ) $ (145,176 ) Loss (gain) related to ineffectiveness recorded in Interest Expense $ — $ — $ 51 Unconsolidated Funds' derivatives (our share) (2) : (Loss) gain recorded in AOCI before reclassifications (1) $ (5,023 ) $ 3,052 $ 3,275 (Gain) loss reclassified from AOCI to Income from unconsolidated Funds (1) $ (1,698 ) $ (813 ) $ 527 Income from unconsolidated Funds presented in the consolidated statements of operations $ 6,923 $ 6,400 $ 5,905 __________________________________________________ (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, 2019 , 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 $ (2,461 ) Unconsolidated Fund's derivatives (our share): Gains to be reclassified from AOCI to Income from unconsolidated Funds $ 235

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2019
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) 2019 2018 2017 Net income attributable to common stockholders $ 363,713 $ 116,086 $ 94,443 Transfers from noncontrolling interests: Exchange of OP Units with noncontrolling interests 3,540 10,292 14,242 Repurchase of OP Units from noncontrolling interests (431 ) (59 ) (6,764 ) Net transfers from noncontrolling interests 3,109 10,233 7,478 Change from net income attributable to common stockholders and transfers from noncontrolling interests $ 366,822 $ 126,319 $ 101,921
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) 2019 2018 2017 Beginning balance $ 53,944 $ 43,099 $ 15,156 Adoption of ASU 2017-12 - cumulative opening balance adjustment — 211 — Consolidated derivatives: Other comprehensive (loss) gain before reclassifications (76,273 ) 22,723 16,512 Reclassification of (gain) loss from AOCI to Interest Expense (24,298 ) (10,103 ) 13,976 Unconsolidated Funds' derivatives (our share) (2) : Other comprehensive (loss) gain before reclassifications (5,023 ) 3,052 3,275 Reclassification of (gain) loss from AOCI to Income from unconsolidated Funds (1,698 ) (813 ) 527 Net current period OCI (107,292 ) 15,070 34,290 OCI attributable to noncontrolling interests 35,886 (4,225 ) (6,347 ) OCI attributable to common stockholders (71,406 ) 10,845 27,943 Ending balance $ (17,462 ) $ 53,944 $ 43,099 __________________________________________________ (1) See Note 10 for the details of our derivatives and Note 14 for our derivative fair value disclosures. (2)
Common Stock Dividends Classification for United States Federal Income Tax Purposes	Our common stock dividends paid during 2019 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 % 12/31/2018 1/15/2019 $ 0.26 51.8 % — % 48.2 % 51.8 % 3/29/2019 4/16/2019 0.26 51.8 % — % 48.2 % 51.8 % 6/28/2019 7/12/2019 0.26 51.8 % — % 48.2 % 51.8 % 9/30/2019 10/16/2019 0.26 51.8 % — % 48.2 % 51.8 % Total / Weighted Average $ 1.04 51.8 % — % 48.2 % 51.8 %

EPS (Tables)

EPS (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2019 2018 2017 Numerator (In thousands): Net income attributable to common stockholders $ 363,713 $ 116,086 $ 94,443 Allocation to participating securities: Unvested LTIP Units (1,594 ) (546 ) (626 ) Net income attributable to common stockholders - basic and diluted $ 362,119 $ 115,540 $ 93,817 Denominator (In thousands): Weighted average shares of common stock outstanding - basic 173,358 169,893 160,905 Effect of dilutive securities: Stock options (1) — 9 325 Weighted average shares of common stock and common stock equivalents outstanding - diluted 173,358 169,902 161,230 Net income per common share - basic $ 2.09 $ 0.68 $ 0.58 Net income per common share - diluted $ 2.09 $ 0.68 $ 0.58 ____________________________________________________ (1) There were no outstanding options during the year ended December 31, 2019 . 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 following table presents the OP Units and vested LTIP Units outstanding for the respective periods: Year Ended December 31, (In thousands) 2019 2018 2017 OP Units 26,465 26,661 24,810 Vested LTIP Units 1,652 813 274

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2019
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) 2019 2018 2017 Stock-based compensation expense, net $ 18,359 $ 22,299 $ 18,478 Capitalized stock-based compensation $ 4,698 $ 5,006 $ 2,537 Intrinsic value of options exercised $ — $ 1,196 $ 102,963
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 Remaining Contract Life (Months) Total Intrinsic Value (Thousands) Intrinsic Value of Options Exercised (Thousands) Outstanding at December 31, 2016 3,969 $ 12.43 27 $ 95,770 Exercised (3,920 ) $ 12.43 $ 102,963 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 outstanding options during the year ended December 31, 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, 2016 1,040 $ 23.46 Granted 828 $ 29.89 $ 24,745 Vested (807 ) $ 25.40 $ 20,497 Forfeited (5 ) $ 31.36 $ 172 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

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
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 ground lease liability: (In thousands) December 31, 2019 Fair value $ 12,218 Carrying value $ 10,882 (In thousands) December 31, 2019 December 31, 2018 Fair value $ 4,678,623 $ 4,087,979 Carrying value $ 4,653,264 $ 4,062,968
Schedule of Financial Instruments Measured at Fair Value	The table below presents the estimated fair value of our derivatives: (In thousands) December 31, 2019 December 31, 2018 Derivative Assets: Fair value - c onsolidated derivatives (1) $ 22,381 $ 73,414 Fair value - unconsolidated Funds' derivatives (2) $ 889 $ 12,228 Derivative Liabilities: Fair value - c onsolidated derivatives (1) $ 54,616 $ 1,530 Fair value - unconsolidated Funds' derivatives (2) $ — $ — ___________________________________________________________________________________ (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) Reflects 100% , not our pro-rata share, of our unconsolidated Funds' derivatives. Our pro-rata share of the amounts related to the unconsolidated Funds' derivatives is included in our Investment in unconsolidated Funds in our consolidated balance sheets. See Note 17 regarding our unconsolidated Funds debt and derivatives. Our unconsolidate d Funds' did not have any derivatives in a liability position for the periods presented.

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2019
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, 2019 2018 2017 Office Segment Total office revenues $ 816,755 $ 777,931 $ 715,546 Office expenses (264,482 ) (252,751 ) (233,633 ) Office segment profit 552,273 525,180 481,913 Multifamily Segment Total multifamily revenues 119,927 103,385 96,506 Multifamily expenses (33,681 ) (28,116 ) (24,401 ) Multifamily segment profit 86,246 75,269 72,105 Total profit from all segments $ 638,519 $ 600,449 $ 554,018
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, 2019 2018 2017 Total profit from all segments $ 638,519 $ 600,449 $ 554,018 General and administrative expenses (38,068 ) (38,641 ) (36,234 ) Depreciation and amortization (357,743 ) (309,864 ) (276,761 ) Other income 11,653 11,414 9,712 Other expenses (7,216 ) (7,744 ) (7,037 ) Income from unconsolidated Funds 6,923 6,400 5,905 Interest expense (143,308 ) (133,402 ) (145,176 ) Gain from consolidation of JV 307,938 — — Net income 418,698 128,612 104,427 Less: Net income attributable to noncontrolling interests (54,985 ) (12,526 ) (9,984 ) Net income attributable to common stockholders $ 363,713 $ 116,086 $ 94,443

Future Minimum Lease Rental R_2

Future Minimum Lease Rental Receipts (Tables)	12 Months Ended
	Dec. 31, 2019
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 at December 31, 2019 : Year Ending December 31, (In thousands) 2020 $ 658,016 2021 572,372 2022 484,611 2023 384,866 2024 294,137 Thereafter 691,145 Total future minimum base rentals (1) $ 3,085,147 _____________________________________________________ (1) Does not include (i) residential leases, which typically have a term of one year or less, (ii) holdover rent, (ii) 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, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of Debt Related to Unconsolidated Funds	The table below summarizes our Fund's debt as of December 31, 2019 . The amounts represent 100% (not our pro-rata share) of the amounts related to our Funds: Fund (1) Loan Maturity Date Principal Balance (In thousands) 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, 2019 , assuming a zero -percent LIBOR interest rate during the remaining life of the swap, the maximum future payments under the swap agreement were $1.2 million . (3) Loan agreement includes a zero -percent LIBOR floor. The corresponding swap does not include such a floor.

Quarterly Financial Informati_2

Quarterly Financial Information (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	The tables below present selected quarterly information for 2019 and 2018 : Three Months Ended (In thousands, except per share amounts) March 31, June 30, 2019 September 30, 2019 December 31, 2019 Total revenue $ 224,186 $ 230,534 $ 238,069 $ 243,893 Net income before noncontrolling interests $ 32,788 $ 39,860 $ 23,421 $ 322,629 Net income attributable to common stockholders $ 28,701 $ 33,966 $ 22,488 $ 278,558 Net income per common share - basic $ 0.17 $ 0.20 $ 0.13 $ 1.58 Net income per common share - diluted $ 0.17 $ 0.20 $ 0.13 $ 1.58 Weighted average shares of common stock outstanding - basic 170,221 172,498 175,278 175,356 Weighted average shares of common stock and common stock equivalents outstanding - diluted 170,221 172,498 175,278 175,356 Three Months Ended (In thousands, except per share amounts) March 31, June 30, 2018 September 30, 2018 December 31, 2018 Total revenue $ 212,247 $ 219,469 $ 223,308 $ 226,292 Net income before noncontrolling interests $ 32,631 $ 37,033 $ 35,416 $ 23,532 Net income attributable to common stockholders $ 28,206 $ 31,684 $ 30,561 $ 25,635 Net income per common share - basic $ 0.17 $ 0.19 $ 0.18 $ 0.15 Net income per common share - diluted $ 0.17 $ 0.19 $ 0.18 $ 0.15 Weighted average shares of common stock outstanding - basic 169,601 169,916 169,926 170,121 Weighted average shares of common stock and common stock equivalents outstanding - diluted 169,625 169,926 169,931 170,121

Overview - Narrative (Details)

Overview - Narrative (Details) $ in Thousands, ft² in Millions	Dec. 31, 2019USD ($)ft²land_parceljoint_ventureunit	Nov. 20, 2019ft²	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Real Estate Properties [Line Items]
Consolidated debt	$ 4,653,264		$ 4,163,982
Number of joint ventures consolidated | joint_venture	4
Consolidated assets	$ 9,349,301		8,261,709
Consolidated investment in real estate	8,960,218		7,783,821
Consolidated liabilities	4,978,367		4,413,279
Consolidated liabilities related to debt	4,619,058		4,134,030
Consolidated equity	4,370,934		3,848,430	$ 3,902,049	$ 3,014,071
Consolidated equity related to noncontrolling interest	$ 1,658,862		1,446,098
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	18
Wholly owned and Consolidated properties | Multifamily
Real Estate Properties [Line Items]
Number of multifamily apartment units | unit	4,161
Unconsolidated Fund properties | Office
Real Estate Properties [Line Items]
Area of real estate portfolio (sq ft) | ft²	0.4	1.8
Subsidiaries
Real Estate Properties [Line Items]
Consolidated debt	$ 3,113,264		$ 3,183,982
Consolidated entities
Real Estate Properties [Line Items]
Consolidated assets	9,350,000
Consolidated investment in real estate	8,960,000
Consolidated liabilities	4,980,000
Consolidated liabilities related to debt	4,620,000
Consolidated equity	4,370,000
Consolidated equity related to noncontrolling interest	$ 1,660,000

Overview - Schedule of Properti

Overview - Schedule of Properties Portfolio (Details) - property	Dec. 31, 2019	Nov. 20, 2019
Real Estate Properties [Line Items]
Number of properties	83
Office
Real Estate Properties [Line Items]
Number of properties	72
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	17
Office | Unconsolidated Fund properties
Real Estate Properties [Line Items]
Number of properties	2	8
Multifamily | Wholly-owned properties
Real Estate Properties [Line Items]
Number of properties	10
Consolidated Portfolio
Real Estate Properties [Line Items]
Number of properties	81
Consolidated Portfolio | Office
Real Estate Properties [Line Items]
Number of properties	70
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	17
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	11
Consolidated Portfolio | Multifamily | Wholly-owned properties
Real Estate Properties [Line Items]
Number of properties	10
Consolidated Portfolio | Multifamily | Consolidated JV properties
Real Estate Properties [Line Items]
Number of properties	1

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details) ft² in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019USD ($)ft²	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2019USD ($)ft²apartmentsegment	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Real Estate Properties [Line Items]
Development costs capitalized									$ 75,300,000	$ 78,700,000	$ 66,000,000
Interest costs capitalized									3,800,000	3,500,000	2,700,000
Total basis difference	$ 27,800,000				$ 2,200,000				27,800,000	2,200,000
Impairment of long-lived assets									0	0	0
Straight-line rent recognized									10,134,000	18,813,000	12,855,000
Lease termination revenue									500,000	1,600,000	2,100,000
Revenues	243,893,000	$ 238,069,000	$ 230,534,000	$ 224,186,000	226,292,000	$ 223,308,000	$ 219,469,000	$ 212,247,000	936,682,000	881,316,000	812,052,000
Parking revenue									108,700,000	102,500,000	96,200,000
Parking receivables	$ 1,300,000				$ 1,100,000				$ 1,300,000	1,100,000
Number of reportable business segments | segment									2
Development Projects | Hawaii
Real Estate Properties [Line Items]
Square footage (sq ft) | ft²	490								490
Number of apartments under construction | apartment									500
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									$ 5,800,000	$ 3,500,000	$ 2,600,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Tenant Receivables and Deferred Rent Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Allowances and Security Obtained from Tenant [Line Items]
Letters of credit from our tenants	$ 27,749
Cash security deposits from our tenants	50,733		$ 60,923
Tenant Receivables
Allowances and Security Obtained from Tenant [Line Items]
Allowance for doubtful accounts	5,215
Increase (decrease) in net income from change in receivable allowance	(2,154)	$ (406)
Deferred Rent Receivables
Allowances and Security Obtained from Tenant [Line Items]
Allowance for doubtful accounts	2,849
Increase (decrease) in net income from change in receivable allowance	$ 556	$ 1,739

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - New Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, initial direct cost expensed		$ 4,200
Lease liability		10,882
Intangible liability offset against right-of-use asset		3,408
Right-of-use asset		7,479
Parking receivables		$ 1,300	$ 1,100
AOCI
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment related to adoption of new accounting standard				$ (211)
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment related to adoption of new accounting standard	$ 2,499
Lease liability	10,900
Intangible liability offset against right-of-use asset	3,400
Right-of-use asset	7,500
ASU 2016-02 | Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment related to adoption of new accounting standard	2,144
ASU 2016-02 | Noncontrolling Interest
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment related to adoption of new accounting standard	$ 355

Investment in Real Estate - Acq

Investment in Real Estate - Acquisitions (Details) ft² in Thousands, $ in Thousands	Nov. 21, 2019USD ($)ft²	Jun. 07, 2019USD ($)ft²unit	Dec. 20, 2017USD ($)ft²	Jul. 20, 2017USD ($)ft²	Apr. 25, 2017USD ($)ft²
Schedule Of Asset Acquisitions [Line Items]
Contract price		$ 365,100
Investment In Real Estate [Abstract]
JV interest in unconsolidated Fund	$ 28,783
The Glendon
Schedule Of Asset Acquisitions [Line Items]
Contract price		$ 365,100
Number of multifamily units | unit		350
Square footage (sq ft) | ft²		50
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
Investment In Real Estate [Abstract]
Tenant improvements and lease intangibles	$ 40,890
Acquired above- and below-market leases, net	(14,198)
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
1299 Ocean
Schedule Of Asset Acquisitions [Line Items]
Contract price					$ 275,800
Square footage (sq ft) | ft²					206
Investment In Real Estate [Abstract]
Tenant improvements and lease intangibles					$ 5,010
Acquired above- and below-market leases, net					(10,683)
Assumed debt					0
Net assets and liabilities acquired					277,263
1299 Ocean | Land
Investment In Real Estate [Abstract]
Land, Building and improvements					22,748
1299 Ocean | Building and improvements
Investment In Real Estate [Abstract]
Land, Building and improvements					260,188
429 Santa Monica
Schedule Of Asset Acquisitions [Line Items]
Contract price					$ 77,000
Square footage (sq ft) | ft²					87
Investment In Real Estate [Abstract]
Tenant improvements and lease intangibles					$ 3,248
Acquired above- and below-market leases, net					(722)
Assumed debt					0
Net assets and liabilities acquired					76,761
429 Santa Monica | Land
Investment In Real Estate [Abstract]
Land, Building and improvements					4,949
429 Santa Monica | Building and improvements
Investment In Real Estate [Abstract]
Land, Building and improvements					$ 69,286
9665 Wilshire
Schedule Of Asset Acquisitions [Line Items]
Contract price				$ 177,000
Square footage (sq ft) | ft²				171
Investment In Real Estate [Abstract]
Tenant improvements and lease intangibles				$ 1,112
Acquired above- and below-market leases, net				(4,339)
Assumed debt				0
Net assets and liabilities acquired				178,301
9665 Wilshire | Land
Investment In Real Estate [Abstract]
Land, Building and improvements				5,568
9665 Wilshire | Building and improvements
Investment In Real Estate [Abstract]
Land, Building and improvements				$ 175,960
9401 Wilshire
Schedule Of Asset Acquisitions [Line Items]
Contract price			$ 143,647
Square footage (sq ft) | ft²			146
Principal balance of loan assumed			$ 32,300
Investment In Real Estate [Abstract]
Tenant improvements and lease intangibles			7,843
Acquired above- and below-market leases, net			(11,559)
Assumed debt			(36,460)
Net assets and liabilities acquired			111,031
9401 Wilshire | Land
Investment In Real Estate [Abstract]
Land, Building and improvements			6,740
9401 Wilshire | Building and improvements
Investment In Real Estate [Abstract]
Land, Building and improvements			$ 144,467

Investment in Real Estate - Nar

Investment in Real Estate - Narrative (Details) shares in Thousands, ft² in Thousands, $ in Thousands	Nov. 21, 2019USD ($)ft²institutional_investorpropertyshares	Jun. 28, 2019	Nov. 20, 2019	Dec. 31, 2019USD ($)property	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)property	Dec. 20, 2017ft²
Schedule Of Asset Acquisitions [Line Items]
Number of properties | property				83
Gain on initial consolidation of joint venture				$ 307,938	$ 0	$ 0
Joint venture, contributions received						284,000
Consolidated Joint Venture
Schedule Of Asset Acquisitions [Line Items]
Capital interest in consolidated JV (percent)		20.00%
Fund X
Schedule Of Asset Acquisitions [Line Items]
Purchase of equity interest (percent)	16.30%		1.40%
Cash consideration in acquisition of equity interest	$ 76,900
OP Units issued in acquisition of equity interest (in units) | shares	332
OP Units issued in acquisition of equity interest	$ 14,400
Equity interest in Fund (percent)	89.00%		72.70%
Number of institutional investors | institutional_investor	1
Partnership X
Schedule Of Asset Acquisitions [Line Items]
Purchase of equity interest (percent)	1.50%		3.90%
Equity interest in Fund (percent)			28.40%	29.90%
VIE | 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
Office
Schedule Of Asset Acquisitions [Line Items]
Number of properties | property				72
1299 Ocean, 429 Santa Monica, and 9665 Wilshire
Schedule Of Asset Acquisitions [Line Items]
Joint venture, contributions received						$ 284,000
1299 Ocean, 429 Santa Monica, and 9665 Wilshire | Office
Schedule Of Asset Acquisitions [Line Items]
Number of properties acquired | property						3
9401 Wilshire
Schedule Of Asset Acquisitions [Line Items]
Square footage (sq ft) | ft²							146
9401 Wilshire | Office
Schedule Of Asset Acquisitions [Line Items]
Number of properties acquired | property						1
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]
Number of properties | property	6
Square footage (sq ft) | ft²	1,500
Partnership X | Office
Schedule Of Asset Acquisitions [Line Items]
Number of properties | property	2
Square footage (sq ft) | ft²	386

Ground Lease - Narrative (Detai

Ground Lease - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee Disclosure [Abstract]
Fixed rent payments due per year on ground lease	$ 733
Ground lease right-of-use asset	7,479
Ground lease liability	10,882
Ground rent expense	$ 733
Ground rent expense		$ 733	$ 733

Ground Lease - Summary of Groun

Ground Lease - Summary of Ground Lease Payments (Details) $ in Thousands	Dec. 31, 2019USD ($)
Future Minimum Ground Lease Payments
2020	$ 733
2021	733
2022	733
2023	733
2024	733
Thereafter	45,445
Total future minimum lease payments	$ 49,110

Acquired Lease Intangibles - Su

Acquired Lease Intangibles - Summary of Acquired Lease Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, net	$ 6,407	$ 3,251
Acquired lease intangible liabilities, net	52,367	52,569
Above-Market Tenant Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, gross	7,220	5,595
Accumulated amortization	(1,741)	(3,289)
Below-Market Tenant Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible liabilities, gross	102,583	112,175
Accumulated accretion	(50,216)	(63,013)
Above-Market Ground Lease
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, gross	1,152	1,152
Accumulated amortization	(224)	(207)
Acquired lease intangible liabilities, gross	0	4,017
Accumulated accretion	$ 0	$ (610)

Acquired Lease Intangibles - Im

Acquired Lease Intangibles - Impact on Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	$ 16,264	$ 22,025	$ 18,006
Rental Revenue | Tenant Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	16,282	21,992	17,973
Office Parking and Other Income | Above-Market Ground Lease
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	(18)	(17)	(17)
Office Expense | Above-Market Ground Lease
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	$ 0	$ 50	$ 50

Acquired Lease Intangibles - Es

Acquired Lease Intangibles - Estimated Future Net Accretion (Details) $ in Thousands	Dec. 31, 2019USD ($)
Estimated Future Net Accretion [Abstract]
2020	$ 15,339
2021	9,371
2022	6,674
2023	4,576
2024	3,702
Thereafter	6,298
Total	$ 45,960

Investments in Unconsolidated_3

Investments in Unconsolidated Funds - Narrative (Details) ft² in Millions	Nov. 21, 2019	Nov. 20, 2019ft²fundproperty	Dec. 31, 2019ft²property
Schedule of Equity Method Investments [Line Items]
Number of office properties			83
Amounts related to the Fund (percent)			100.00%
Opportunity Fund
Schedule of Equity Method Investments [Line Items]
Equity interest in Fund (percent)		6.20%
Fund X
Schedule of Equity Method Investments [Line Items]
Equity interest in Fund (percent)	89.00%	72.70%
Purchase of equity interest (percent)	16.30%	1.40%
Partnership X
Schedule of Equity Method Investments [Line Items]
Equity interest in Fund (percent)		28.40%	29.90%
Purchase of equity interest (percent)	1.50%	3.90%
Unconsolidated Fund properties
Schedule of Equity Method Investments [Line Items]
Number of real estate funds owned and managed | fund		3
Office
Schedule of Equity Method Investments [Line Items]
Number of office properties			72
Office | Unconsolidated Fund properties
Schedule of Equity Method Investments [Line Items]
Number of office properties		8	2
Area of real estate portfolio (sq ft) | ft²		1.8	0.4

Investments in Unconsolidated_4

Investments in Unconsolidated Funds - Summary of Cash Distributions Received from Funds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Real Estate Investments, Net [Abstract]
Operating distributions received	$ 6,820	$ 6,400	$ 5,905
Capital distributions received	5,853	7,349	43,560
Total distributions received	$ 12,673	$ 13,749	$ 49,465

Investments in Unconsolidated_5

Investments in Unconsolidated Funds - Summary of Statement of Financial Position Information for Funds (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Real Estate Investments, Net [Abstract]
Total assets	$ 136,479	$ 694,713
Total liabilities	113,330	525,483
Total equity	$ 23,149	$ 169,230

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Real Estate Investments, Net [Abstract]
Total revenues	$ 75,952	$ 79,590	$ 75,896
Operating income	22,269	22,959	20,640
Net income	$ 7,350	$ 6,260	$ 5,085

Other Assets - Summary of Other

Other Assets - Summary of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Assets [Abstract]
Restricted cash	$ 121	$ 121
Prepaid expenses	8,711	7,830
Other indefinite-lived intangibles	1,988	1,988
Furniture, fixtures and equipment, net	2,368	1,101
Other	3,233	3,719
Total other assets	$ 16,421	$ 14,759

Secured Notes Payable and Rev_3

Secured Notes Payable and Revolving Credit Facility, Net - Schedule of Secured Notes Payable and Revolving Credit Facility (Details)	1 Months Ended	12 Months Ended
	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)propertycollateral_pool	Dec. 01, 2020	Jul. 01, 2020	Apr. 01, 2020	Mar. 02, 2020	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Principal Balance		$ 4,653,264,000					$ 4,163,982,000
Unamortized loan premium, net		6,741,000					3,986,000
Unamortized deferred loan costs, net		(40,947,000)					(33,938,000)
Total Consolidated Debt, net		$ 4,619,058,000					4,134,030,000
Minimum number of collateral pools used to secure loans | collateral_pool		1
Minimum number of properties in collateral pools | property		1
Secured Debt | LIBOR | Minimum
Debt Instrument [Line Items]
Variable Interest Rate - basis spread (percent)		0.00%
Secured Debt | Term Loan at 4.55% Jun 01 2038
Debt Instrument [Line Items]
Principal amortization period (in years)		30 years
Secured Debt | Term Loan at 3.25% Jun 01 2029
Debt Instrument [Line Items]
Principal Balance		$ 160,000,000
Wholly-Owned Subsidiaries
Debt Instrument [Line Items]
Principal Balance		$ 3,113,264,000					3,183,982,000
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan with Maturity Oct 01 2019
Debt Instrument [Line Items]
Principal Balance							145,000,000
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan with Maturity Dec 01 2025
Debt Instrument [Line Items]
Principal Balance							115,000,000
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 3.62% Dec 23 2023
Debt Instrument [Line Items]
Principal Balance							220,000,000
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.77% Apr 15 2022
Debt Instrument [Line Items]
Principal Balance							340,000,000
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.64% Nov 01 2022
Debt Instrument [Line Items]
Principal Balance							400,000,000
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 3.06% Jul 27 2022
Debt Instrument [Line Items]
Principal Balance							180,000,000
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.57% Jun 23 2023
Debt Instrument [Line Items]
Principal Balance							360,000,000
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
Variable Interest Rate		LIBOR + 1.55%
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 - basis spread (percent)		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
Variable Interest Rate		LIBOR + 1.30%
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 - basis spread (percent)		1.30%
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 2.84% Apr 01 2025
Debt Instrument [Line Items]
Maturity Date		Apr. 1, 2025
Principal Balance		$ 102,400,000					102,400,000
Variable Interest Rate		LIBOR + 1.25%
Fixed Interest Rate		2.84%
Swap Maturity Date		Mar. 1, 2023
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 2.84% Apr 01 2025 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate - basis spread (percent)		1.25%
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.58% Aug 15 2026
Debt Instrument [Line Items]
Maturity Date		Aug. 15, 2026
Principal Balance		$ 415,000,000					0
Variable Interest Rate		LIBOR + 1.10%
Fixed Interest Rate		2.58%
Swap Maturity Date		Aug. 1, 2025
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.58% Aug 15 2026 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate - basis spread (percent)		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					0
Variable Interest Rate		LIBOR + 1.15%
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 - basis spread (percent)		1.15%
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.77% Sep 26 2026
Debt Instrument [Line Items]
Maturity Date		Sep. 26, 2026
Principal Balance		$ 200,000,000					0
Variable Interest Rate		LIBOR + 1.20%
Fixed Interest Rate		2.77%
Swap Maturity Date		Oct. 1, 2024
Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.77% Sep 26 2026 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate - basis spread (percent)		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					0
Variable Interest Rate		LIBOR + 1.15%
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 - basis spread (percent)		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
Variable Interest Rate		LIBOR + 1.37%
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 - basis spread (percent)		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					0
Variable Interest Rate		LIBOR + 0.98%
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 - basis spread (percent)		0.98%
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 2.55% Jun 01 2029
Debt Instrument [Line Items]
Maturity Date		Jun. 1, 2029
Principal Balance		$ 125,000,000					0
Variable Interest Rate		LIBOR + 0.98%
Fixed Interest Rate		2.55%
Swap Maturity Date		Jun. 1, 2027
Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 2.55% Jun 01 2029 | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate - basis spread (percent)		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		$ 30,864,000					31,582,000
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		$ 0					105,000,000
Variable Interest Rate		LIBOR + 1.15%
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 - basis spread (percent)		1.15%
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
Variable Interest Rate		LIBOR + 1.40%
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 - basis spread (percent)		1.40%
Consolidated JV | Secured Debt | Term Loan at 3.44% Jul 01 2024
Debt Instrument [Line Items]
Maturity Date		Jul. 1, 2024
Principal Balance		$ 400,000,000					0
Variable Interest Rate		LIBOR + 1.65%
Variable Interest Rate - basis spread (percent)		1.65%
Fixed Interest Rate		3.44%
Swap Maturity Date		Jul. 1, 2022
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
Variable Interest Rate		LIBOR + 1.30%
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 - basis spread (percent)		1.30%
Consolidated JV | Secured Debt | Term Loan at 3.25% Jun 01 2029
Debt Instrument [Line Items]
Maturity Date		Jun. 1, 2029
Principal Balance							$ 0
Variable Interest Rate		LIBOR + 0.98%
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 - basis spread (percent)		0.98%
Forecast | Wholly-Owned Subsidiaries | Secured Debt | Fannie Mae Loan at 2.84% Apr 01 2025
Debt Instrument [Line Items]
Fixed Interest Rate						2.76%
Forecast | Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.58% Aug 15 2026
Debt Instrument [Line Items]
Fixed Interest Rate					3.07%
Forecast | Wholly-Owned Subsidiaries | Secured Debt | Term Loan at 2.77% Sep 26 2026
Debt Instrument [Line Items]
Fixed Interest Rate				2.36%
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 | Fannie Mae Loan at 2.55% Jun 01 2029
Debt Instrument [Line Items]
Fixed Interest Rate			3.25%

Secured Notes Payable and Rev_4

Secured Notes Payable and Revolving Credit Facility, Net - Schedule of Debt Statistics (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Principal balance of consolidated fixed rate debt	$ 4,650,000
Weighted average remaining life (including extension options) of consolidated fixed rate debt (in years)	6 years 1 month 6 days
Weighted average remaining fixed interest period of consolidated fixed rate debt (in years)	3 years 10 months 24 days
Weighted average annual interest rate of consolidated fixed rate debt (percent)	3.00%
Debt Instrument [Line Items]
Principal Balance	$ 4,653,264	$ 4,163,982
Aggregate swapped to fixed rate loans
Debt Instrument [Line Items]
Principal Balance	4,622,400	3,882,400
Aggregate fixed rate loans
Debt Instrument [Line Items]
Principal Balance	30,864	31,582
Aggregate floating rate loans
Debt Instrument [Line Items]
Principal Balance	$ 0	$ 250,000

Secured Notes Payable and Rev_5

Secured Notes Payable and Revolving Credit Facility, Net - Schedule of Minimum Future Principal Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Excluding Maturity Extension Options
2020	$ 752
2021	787
2022	300,823
2023	915,862
2024	800,902
Thereafter	2,634,138
Total future principal payments	4,653,264	$ 4,163,982
Including Maturity Extension Options
2020	752
2021	787
2022	823
2023	580,862
2024	1,100,902
Thereafter	2,969,138
Total future principal payments	$ 4,653,264	$ 4,163,982

Secured Notes Payable and Rev_6

Secured Notes Payable and Revolving Credit Facility, Net - Schedule of Loan Costs and Accumulated Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Accumulated amortization on deferred loan costs	$ 30,700	$ 24,200
Loan Costs Included in Interest Expense
Deferred loan cost amortization	14,314	8,292	$ 10,834
Interest Expense
Loan Costs Included in Interest Expense
Loan costs expensed	1,318	58	557
Deferred loan costs written off	6,865	360	1,802
Deferred loan cost amortization	7,449	7,874	9,033
Total	$ 15,632	$ 8,292	$ 11,392

Interest Payable, Accounts Pa_3

Interest Payable, Accounts Payable and Deferred Revenue - Summary of Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts Payable and Accrued Liabilities [Abstract]
Interest payable	$ 11,707	$ 10,657
Accounts payable and accrued liabilities	66,437	75,111
Deferred revenue	53,266	44,386
Total interest payable, accounts payable and deferred revenue	$ 131,410	$ 130,154

Derivative Contracts - Summary

Derivative Contracts - Summary of Derivatives (Details) - Interest Rate Swap - Derivatives Designated as Cash Flow Hedges - Cash Flow Hedging $ in Thousands	Dec. 31, 2019USD ($)instrument
Derivative [Line Items]
Number of Interest Rate Swaps | instrument	43
Notional	$ 5,124,800
Unconsolidated Fund
Derivative [Line Items]
Number of Interest Rate Swaps | instrument	1
Notional	$ 110,000
Percent of notional amount related to the Fund	100.00%
Forward Contracts
Derivative [Line Items]
Notional	$ 502,400

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, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Fair value derivatives in a net liability position	$ 56,896	$ 1,681
Unconsolidated Fund
Derivative Instruments, Gain (Loss) [Line Items]
Fair value derivatives in a net liability position	$ 0	$ 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, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivatives in an asset position	$ 22,381	$ 73,414
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	23,275	76,021
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	$ 963	$ 12,576
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, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Gain recorded in AOCI - Adoption of ASU 2017-12	$ 0	$ 211	$ 0
(Loss) gain recorded in AOCI	(76,273)	22,723
Gain recorded in AOCI			16,512
Interest expense	(143,308)	(133,402)	(145,176)
Income from unconsolidated Funds	6,923	6,400	5,905
Unconsolidated Fund
Derivative [Line Items]
(Loss) gain recorded in AOCI	(5,023)	3,052
Gain recorded in AOCI			3,275
Cash Flow Hedging | Derivatives Designated as Cash Flow Hedges
Derivative [Line Items]
Gain recorded in AOCI - Adoption of ASU 2017-12		211
(Loss) gain recorded in AOCI	(76,273)	22,723
Gain recorded in AOCI			16,512
(Gain) loss reclassified from AOCI	(24,298)	(10,103)
(Gain) loss reclassified from AOCI			13,976
Cash Flow Hedging | Derivatives Designated as Cash Flow Hedges | Interest Expense
Derivative [Line Items]
Loss (gain) related to ineffectiveness recorded in Interest Expense			51
Cash Flow Hedging | Derivatives Designated as Cash Flow Hedges | Unconsolidated Fund
Derivative [Line Items]
(Loss) gain recorded in AOCI	(5,023)	3,052
Gain recorded in AOCI			3,275
(Gain) loss reclassified from AOCI	$ (1,698)	$ (813)
(Gain) loss reclassified from AOCI			$ 527

Derivative Contracts - Future R

Derivative Contracts - Future Reclassifications from AOCI (Details) $ in Thousands	Dec. 31, 2019USD ($)
Derivative [Line Items]
Derivative gains (losses) to be reclassified during next year	$ (2,461)
Unconsolidated Fund
Derivative [Line Items]
Derivative gains (losses) to be reclassified during next year	$ 235

Equity - Narrative (Details)

Equity - Narrative (Details)	Nov. 21, 2019USD ($)shares	Jun. 28, 2019	Jun. 07, 2019USD ($)	Nov. 20, 2019	Dec. 31, 2019USD ($)shares	Dec. 31, 2018USD ($)shares	Dec. 31, 2017USD ($)propertyshares
Schedule of Equity Method Investments [Line Items]
Number of OP Units converted to shares of common stock (in shares) | shares					222,000	629,000	1,100,000
Number of OP Units redeemed (in shares) | shares					19,000	3,000	248,000
OP Units redeemed with cash | $					$ 734,000	$ 108,000	$ 10,104,000
Shares issued under ATM program (shares) | shares					4,900,000		15,700,000
Net proceeds from issuance of common stock | $					$ 201,000,000		$ 593,300,000
Units issued in connection with acquisition of property (in units) | shares							2,600,000
Units issued in connection with acquisition of property | $							$ 105,687,000
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) | shares						21,000	1,300,000
Number of stock options exercised (in shares) | shares						49,000	3,920,000
Joint venture, contributions received | $							$ 284,000,000
Common stock, outstanding (in shares) | shares					175,369,746	170,214,809
Number of shares of common stock issued upon redemption of one OP Unit (in shares) | shares					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)					14.00%
Noncontrolling interests units ownership in Operating Partnership (in units) | shares					29,100,000
Office | Consolidated JV
Schedule of Equity Method Investments [Line Items]
Number of properties acquired | property							3
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%
Cash consideration in acquisition of equity interest | $	$ 76,900,000
OP Units issued in acquisition of equity interest (in units) | shares	332,000
OP Units issued in acquisition of equity interest | $	$ 14,400,000
Equity interest in Fund (percent)	89.00%			72.70%

Equity - Net Income Attributabl

Equity - Net Income Attributable to Common Stockholders and Transfers (to) from Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stockholders' Equity Note [Abstract]
Net income attributable to common stockholders	$ 278,558	$ 22,488	$ 33,966	$ 28,701	$ 25,635	$ 30,561	$ 31,684	$ 28,206	$ 363,713	$ 116,086	$ 94,443
Transfers from noncontrolling interests:
Exchange of OP Units with noncontrolling interests									3,540	10,292	14,242
Repurchase of OP Units from noncontrolling interests									(431)	(59)	(6,764)
Net transfers from noncontrolling interests									3,109	10,233	7,478
Change from net income attributable to common stockholders and transfers from noncontrolling interests									$ 366,822	$ 126,319	$ 101,921

Equity - Accumulated Other Comp

Equity - Accumulated Other Comprehensive Income Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 3,848,430	$ 3,902,049	$ 3,014,071
Other comprehensive (loss) gain before reclassifications	(76,273)	22,723	16,512
Reclassification of (gain) loss from AOCI	(24,298)	(10,103)	13,976
Net current period OCI	(107,292)	15,070	34,290
OCI attributable to noncontrolling interests	35,886	(4,225)	(6,347)
OCI attributable to common stockholders	(71,406)	10,845	27,943
Ending balance	4,370,934	3,848,430	3,902,049
Unconsolidated Fund
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive (loss) gain before reclassifications	(5,023)	3,052	3,275
Reclassification of (gain) loss from AOCI	(1,698)	(813)	527
AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	53,944	43,099	15,156
ASU 2017-12 adoption				$ 211
Ending balance	$ (17,462)	$ 53,944	$ 43,099

Equity - Dividends (Details)

Equity - Dividends (Details) - $ / shares	3 Months Ended				12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2019
Dividends, Common Stock [Abstract]
Record Date	Sep. 30, 2019	Jun. 28, 2019	Mar. 29, 2019	Dec. 31, 2018
Paid Date	Oct. 16, 2019	Jul. 12, 2019	Apr. 16, 2019	Jan. 15, 2019
Dividend Per Share (usd per share)	$ 0.26	$ 0.26	$ 0.26	$ 0.26	$ 1.04
Ordinary Income (percent)	51.80%	51.80%	51.80%	51.80%	51.80%
Capital Gain (percent)	0.00%	0.00%	0.00%	0.00%	0.00%
Return of Capital (percent)	48.20%	48.20%	48.20%	48.20%	48.20%
Section 199A Dividend (percent)	51.80%	51.80%	51.80%	51.80%	51.80%

EPS - Summary of EPS Calculatio

EPS - Summary of EPS Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income attributable to common stockholders	$ 278,558	$ 22,488	$ 33,966	$ 28,701	$ 25,635	$ 30,561	$ 31,684	$ 28,206	$ 363,713	$ 116,086	$ 94,443
Allocation to participating securities: Unvested LTIP Units									(1,594)	(546)	(626)
Net income attributable to common stockholders - basic and diluted									$ 362,119	$ 115,540	$ 93,817
Weighted average shares of common stock outstanding - basic (in shares)	175,356	175,278	172,498	170,221	170,121	169,926	169,916	169,601	173,358	169,893	160,905
Effect of dilutive securities: Stock options (in shares)									0	9	325
Weighted average shares of common stock and common stock equivalents outstanding - diluted (in shares)	175,356	175,278	172,498	170,221	170,121	169,931	169,926	169,625	173,358	169,902	161,230
Basic EPS:
Net income attributable to common stockholders per share – basic (usd per share)	$ 1.58	$ 0.13	$ 0.20	$ 0.17	$ 0.15	$ 0.18	$ 0.19	$ 0.17	$ 2.09	$ 0.68	$ 0.58
Diluted EPS:
Net income attributable to common stockholders per share – diluted (usd per share)	$ 1.58	$ 0.13	$ 0.20	$ 0.17	$ 0.15	$ 0.18	$ 0.19	$ 0.17	$ 2.09	$ 0.68	$ 0.58
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)									26,465	26,661	24,810
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)									1,652	813	274

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)installmentshares	Dec. 31, 2018shares	Dec. 31, 2017shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)	1,800,000
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
Awards granted to key employees (in shares)	802,000	898,000	800,000
Unrecognized compensation cost related to nonvested options and LTIP unit awards | $	$ 22
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)	38,000	37,000	28,000
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, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Payment Arrangement [Abstract]
Stock-based compensation expense, net	$ 18,359	$ 22,299	$ 18,478
Capitalized stock-based compensation	4,698	5,006	2,537
Intrinsic value of options exercised	$ 0	$ 1,196	$ 102,963

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, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of Stock Options
Outstanding, beginning balance (in shares)	0	49	3,969
Exercised (in shares)		(49)	(3,920)
Outstanding, ending balance (in shares)	0	0	49	3,969
Weighted Average Exercise Price
Outstanding, beginning balance (usd per share)	$ 0	$ 12.66	$ 12.43
Exercised (usd per share)		12.66	12.43
Outstanding, ending balance (usd per share)		$ 0	$ 12.66	$ 12.43
Weighted Average Remaining Contract Life, Outstanding	0 years		16 months	27 months
Total Intrinsic Value, Outstanding		$ 0	$ 1,375	$ 95,770
Intrinsic value of options exercised	$ 0	$ 1,196	$ 102,963

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Units
Outstanding, beginning balance (in shares)	945	1,056	1,040
Granted (in shares)	840	935	828
Vested (in shares)	(826)	(1,036)	(807)
Forfeited (in shares)	(35)	(10)	(5)
Outstanding, ending balance (in shares)	924	945	1,056
Weighted Average Grant Date Fair Value
Outstanding, beginning balance (usd per share)	$ 28.20	$ 26.98	$ 23.46
Granted (usd per share)	31.92	27.01	29.89
Vested (usd per share)	29.13	25.82	25.40
Forfeited (usd per share)	35.41	34.18	31.36
Outstanding, ending balance (usd per share)	$ 30.48	$ 28.20	$ 26.98
Grant Date Fair Value, Granted	$ 26,821	$ 25,247	$ 24,745
Grant Date Fair Value, Vested	24,061	26,740	20,497
Grant Date Fair Value, Forfeited	$ 1,234	$ 333	$ 172

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Estimated Fair Value of Secured Notes Payable (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ground lease liability	$ 10,882
Fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured notes payable	4,678,623	$ 4,087,979
Ground lease liability	12,218
Carrying value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured notes payable	4,653,264	$ 4,062,968
Ground lease liability	$ 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, 2019	Dec. 31, 2018
Derivative Assets:
Fair value - derivatives	$ 22,381	$ 73,414
Derivative Liabilities:
Fair value - derivatives	$ 54,616	1,530
Fund X | Interest Rate Swap
Derivative Liabilities:
Percent of notional amount related to the Fund	100.00%
Level 2
Derivative Assets:
Fair value - derivatives	$ 22,381	73,414
Derivative Liabilities:
Fair value - derivatives	54,616	1,530
Level 2 | Fund X
Derivative Assets:
Fair value - unconsolidated Funds' derivatives	889	12,228
Derivative Liabilities:
Fair value - unconsolidated Funds' derivatives	$ 0	$ 0

Segment Reporting - Narrative (

Segment Reporting - Narrative (Details)	12 Months Ended
	Dec. 31, 2019segment
Segment Reporting [Abstract]
Number of reportable business segments	2

Segment Reporting - Operating A

Segment Reporting - Operating Activity Within Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 243,893	$ 238,069	$ 230,534	$ 224,186	$ 226,292	$ 223,308	$ 219,469	$ 212,247	$ 936,682	$ 881,316	$ 812,052
Office Segment
Segment Reporting Information [Line Items]
Total revenue									816,755	777,931	715,546
Operating expenses									(264,482)	(252,751)	(233,633)
Multifamily Segment
Segment Reporting Information [Line Items]
Total revenue									119,927	103,385	96,506
Operating expenses									(33,681)	(28,116)	(24,401)
Reportable Segments
Segment Reporting Information [Line Items]
Total segment profit									638,519	600,449	554,018
Reportable Segments | Office Segment
Segment Reporting Information [Line Items]
Total revenue									816,755	777,931	715,546
Operating expenses									(264,482)	(252,751)	(233,633)
Total segment profit									552,273	525,180	481,913
Reportable Segments | Multifamily Segment
Segment Reporting Information [Line Items]
Total revenue									119,927	103,385	96,506
Operating expenses									(33,681)	(28,116)	(24,401)
Total segment profit									$ 86,246	$ 75,269	$ 72,105

Segment Reporting - Reconciliat

Segment Reporting - Reconciliation of Segment Profit to Net Income Attributable to Common Stockholders (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation from segment profit to net income
General and administrative expenses									$ (38,068)	$ (38,641)	$ (36,234)
Depreciation and amortization									(357,743)	(309,864)	(276,761)
Other income									11,653	11,414	9,712
Other expenses									(7,216)	(7,744)	(7,037)
Income from unconsolidated Funds									6,923	6,400	5,905
Interest expense									(143,308)	(133,402)	(145,176)
Gain from consolidation of JV									307,938	0	0
Net income	$ 322,629	$ 23,421	$ 39,860	$ 32,788	$ 23,532	$ 35,416	$ 37,033	$ 32,631	418,698	128,612	104,427
Less: Net income attributable to noncontrolling interests									(54,985)	(12,526)	(9,984)
Net income attributable to common stockholders	$ 278,558	$ 22,488	$ 33,966	$ 28,701	$ 25,635	$ 30,561	$ 31,684	$ 28,206	363,713	116,086	94,443
Reportable Segments
Reconciliation from segment profit to net income
Total profit from all segments									$ 638,519	$ 600,449	$ 554,018

Future Minimum Lease Rental R_3

Future Minimum Lease Rental Receipts - Narrative (Details)	12 Months Ended
	Dec. 31, 2019land_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 - Summary of Future Minimum Rental Receipts (Details) $ in Thousands	Dec. 31, 2019USD ($)
Future Minimum Base Rentals
2020	$ 658,016
2021	572,372
2022	484,611
2023	384,866
2024	294,137
Thereafter	691,145
Total future minimum base rentals	$ 3,085,147

Commitments, Contingencies an_3

Commitments, Contingencies and Guarantees - Narrative (Details) ft² in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)ft²apartmentbuilding
Other Commitments [Line Items]
Number of buildings containing asbestos | building	32
Development Projects
Other Commitments [Line Items]
Aggregate remaining contractual commitment | $	$ 233.3
Development Projects | California
Other Commitments [Line Items]
Number of apartments under construction | apartment	376
Expected construction time frame (in years)	3 years
Development Projects | Hawaii
Other Commitments [Line Items]
Number of apartments under construction | apartment	500
Square footage of office tower conversion (sq ft) | ft²	490
Repositionings, Capital Expenditure Projects, And Tenant Improvements [Member]
Other Commitments [Line Items]
Aggregate remaining contractual commitment | $	$ 24.6

Commitments, Contingencies an_4

Commitments, Contingencies and Guarantees - Debt Related to Unconsolidated Funds (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)property	Dec. 31, 2018USD ($)
Guarantor Obligations [Line Items]
Principal Balance	$ 4,653,264	$ 4,163,982
Amounts related to the Fund (percent)	100.00%
Partnership X
Guarantor Obligations [Line Items]
Maximum future payments under swap agreement	$ 1,200
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 - basis spread (percent)	1.40%
Partnership X | Interest rate swap
Guarantor Obligations [Line Items]
Swap Fixed Interest Rate	2.30%
Swap Maturity Date	Mar. 1, 2021
Unconsolidated Fund
Guarantor Obligations [Line Items]
Amounts related to the Fund (percent)	100.00%

Quarterly Financial Informati_3

Quarterly Financial Information (unaudited) - Selected Quarterly Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 243,893	$ 238,069	$ 230,534	$ 224,186	$ 226,292	$ 223,308	$ 219,469	$ 212,247	$ 936,682	$ 881,316	$ 812,052
Net income before noncontrolling interests	322,629	23,421	39,860	32,788	23,532	35,416	37,033	32,631	418,698	128,612	104,427
Net income attributable to common stockholders	$ 278,558	$ 22,488	$ 33,966	$ 28,701	$ 25,635	$ 30,561	$ 31,684	$ 28,206	$ 363,713	$ 116,086	$ 94,443
Net income per common share - basic (usd per share)	$ 1.58	$ 0.13	$ 0.20	$ 0.17	$ 0.15	$ 0.18	$ 0.19	$ 0.17	$ 2.09	$ 0.68	$ 0.58
Net income per common share - diluted (usd per share)	$ 1.58	$ 0.13	$ 0.20	$ 0.17	$ 0.15	$ 0.18	$ 0.19	$ 0.17	$ 2.09	$ 0.68	$ 0.58
Weighted average shares of common stock outstanding - basic (in shares)	175,356	175,278	172,498	170,221	170,121	169,926	169,916	169,601	173,358	169,893	160,905
Weighted average shares of common stock and common stock equivalents outstanding - diluted (in shares)	175,356	175,278	172,498	170,221	170,121	169,931	169,926	169,625	173,358	169,902	161,230

Schedule III - Consolidated R_2

Schedule III - Consolidated Real Estate and Accumulated Depreciation and Amortization - By Property (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 4,653,264
Initial Cost
Land	891,548
Buildings & Improvements	6,610,605
Cost Capitalized Subsequent to Acquisition
Improvements	3,976,480
Gross Carrying Amount
Land	1,165,754
Buildings & Improvements	10,312,879
Total	11,478,633	$ 10,030,708	$ 9,829,208	$ 8,998,120
Accumulated Depreciation & Amortization	2,518,415	2,246,887	$ 2,012,752	$ 1,789,678
Principal Balance	4,653,264	$ 4,163,982
Aggregate federal income tax cost basis for consolidated real estate	7,910,000
Line of Credit | Revolving Credit Facility With Maturity Date of August 21, 2020
Gross Carrying Amount
Principal Balance	0
Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,653,264
Initial Cost
Land	878,478
Buildings & Improvements	6,610,605
Cost Capitalized Subsequent to Acquisition
Improvements	3,877,835
Gross Carrying Amount
Land	1,152,684
Buildings & Improvements	10,214,234
Total	11,366,918
Accumulated Depreciation & Amortization	2,518,415
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	98,645
Gross Carrying Amount
Land	13,070
Buildings & Improvements	98,645
Total	111,715
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	252,034
Initial Cost
Land	12,769
Buildings & Improvements	78,447
Cost Capitalized Subsequent to Acquisition
Improvements	151,175
Gross Carrying Amount
Land	27,108
Buildings & Improvements	215,283
Total	242,391
Accumulated Depreciation & Amortization	73,429
233 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	62,962
Initial Cost
Land	9,263
Buildings & Improvements	130,426
Cost Capitalized Subsequent to Acquisition
Improvements	3,549
Gross Carrying Amount
Land	9,263
Buildings & Improvements	133,975
Total	143,238
Accumulated Depreciation & Amortization	14,268
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	129,932
Gross Carrying Amount
Land	21,787
Buildings & Improvements	147,321
Total	169,108
Accumulated Depreciation & Amortization	47,259
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	3,086
Gross Carrying Amount
Land	4,949
Buildings & Improvements	75,620
Total	80,569
Accumulated Depreciation & Amortization	6,978
1132 Bishop Street | 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	55,172
Gross Carrying Amount
Land	8,833
Buildings & Improvements	160,307
Total	169,140
Accumulated Depreciation & Amortization	87,669
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	15,300
Gross Carrying Amount
Land	22,748
Buildings & Improvements	280,498
Total	303,246
Accumulated Depreciation & Amortization	22,015
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	114,260
Gross Carrying Amount
Land	26,163
Buildings & Improvements	238,363
Total	264,526
Accumulated Depreciation & Amortization	86,611
2001 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	36,000
Initial Cost
Land	5,711
Buildings & Improvements	81,622
Cost Capitalized Subsequent to Acquisition
Improvements	151
Gross Carrying Amount
Land	5,711
Buildings & Improvements	81,773
Total	87,484
Accumulated Depreciation & Amortization	273
8383 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	138,000
Initial Cost
Land	18,005
Buildings & Improvements	328,118
Cost Capitalized Subsequent to Acquisition
Improvements	695
Gross Carrying Amount
Land	18,005
Buildings & Improvements	328,813
Total	346,818
Accumulated Depreciation & Amortization	1,076
8484 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	8,846
Buildings & Improvements	77,780
Cost Capitalized Subsequent to Acquisition
Improvements	16,101
Gross Carrying Amount
Land	8,846
Buildings & Improvements	93,881
Total	102,727
Accumulated Depreciation & Amortization	21,021
9100 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	115,000
Initial Cost
Land	13,455
Buildings & Improvements	258,329
Cost Capitalized Subsequent to Acquisition
Improvements	518
Gross Carrying Amount
Land	13,455
Buildings & Improvements	258,847
Total	272,302
Accumulated Depreciation & Amortization	807
9401 Wilshire | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	30,864
Initial Cost
Land	6,740
Buildings & Improvements	152,310
Cost Capitalized Subsequent to Acquisition
Improvements	12,743
Gross Carrying Amount
Land	6,740
Buildings & Improvements	165,053
Total	171,793
Accumulated Depreciation & Amortization	10,617
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	105,395
Gross Carrying Amount
Land	17,658
Buildings & Improvements	159,108
Total	176,766
Accumulated Depreciation & Amortization	57,708
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	18,550
Gross Carrying Amount
Land	5,568
Buildings & Improvements	195,622
Total	201,190
Accumulated Depreciation & Amortization	12,887
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	31,763
Gross Carrying Amount
Land	29,988
Buildings & Improvements	469,284
Total	499,272
Accumulated Depreciation & Amortization	53,543
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	27,072
Gross Carrying Amount
Land	45,852
Buildings & Improvements	456,833
Total	502,685
Accumulated Depreciation & Amortization	54,210
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	29,600
Gross Carrying Amount
Land	6,714
Buildings & Improvements	43,686
Total	50,400
Accumulated Depreciation & Amortization	16,119
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	8,255
Gross Carrying Amount
Land	20,164
Buildings & Improvements	217,010
Total	237,174
Accumulated Depreciation & Amortization	26,206
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	76,442
Gross Carrying Amount
Land	8,828
Buildings & Improvements	106,910
Total	115,738
Accumulated Depreciation & Amortization	38,680
15250 Ventura | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	26,000
Initial Cost
Land	2,130
Buildings & Improvements	48,907
Cost Capitalized Subsequent to Acquisition
Improvements	139
Gross Carrying Amount
Land	2,130
Buildings & Improvements	49,046
Total	51,176
Accumulated Depreciation & Amortization	211
16000 Ventura | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	42,000
Initial Cost
Land	1,936
Buildings & Improvements	89,531
Cost Capitalized Subsequent to Acquisition
Improvements	301
Gross Carrying Amount
Land	1,936
Buildings & Improvements	89,832
Total	91,768
Accumulated Depreciation & Amortization	325
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	11,387
Gross Carrying Amount
Land	6,759
Buildings & Improvements	64,499
Total	71,258
Accumulated Depreciation & Amortization	15,359
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	28,814
Gross Carrying Amount
Land	6,435
Buildings & Improvements	55,100
Total	61,535
Accumulated Depreciation & Amortization	20,186
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	31,072
Gross Carrying Amount
Land	16,273
Buildings & Improvements	244,865
Total	261,138
Accumulated Depreciation & Amortization	70,903
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	524
Gross Carrying Amount
Land	2,563
Buildings & Improvements	9,397
Total	11,960
Accumulated Depreciation & Amortization	3,653
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	32,710
Gross Carrying Amount
Land	5,921
Buildings & Improvements	39,698
Total	45,619
Accumulated Depreciation & Amortization	14,519
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	1,285
Gross Carrying Amount
Land	5,933
Buildings & Improvements	29,122
Total	35,055
Accumulated Depreciation & Amortization	11,088
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	1,180
Gross Carrying Amount
Land	5,557
Buildings & Improvements	17,637
Total	23,194
Accumulated Depreciation & Amortization	6,782
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	11,766
Gross Carrying Amount
Land	4,775
Buildings & Improvements	23,074
Total	27,849
Accumulated Depreciation & Amortization	8,845
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	29,078
Gross Carrying Amount
Land	6,030
Buildings & Improvements	39,109
Total	45,139
Accumulated Depreciation & Amortization	14,450
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	27,853
Gross Carrying Amount
Land	5,298
Buildings & Improvements	37,878
Total	43,176
Accumulated Depreciation & Amortization	13,704
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	6,241
Gross Carrying Amount
Land	6,594
Buildings & Improvements	76,696
Total	83,290
Accumulated Depreciation & Amortization	15,396
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	132,532
Gross Carrying Amount
Land	16,153
Buildings & Improvements	197,415
Total	213,568
Accumulated Depreciation & Amortization	60,946
Century Park West | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	3,717
Buildings & Improvements	29,099
Cost Capitalized Subsequent to Acquisition
Improvements	(1,050)
Gross Carrying Amount
Land	3,667
Buildings & Improvements	28,099
Total	31,766
Accumulated Depreciation & Amortization	10,038
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	9,569
Gross Carrying Amount
Land	2,333
Buildings & Improvements	19,728
Total	22,061
Accumulated Depreciation & Amortization	7,439
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	18,918
Gross Carrying Amount
Land	5,366
Buildings & Improvements	32,599
Total	37,965
Accumulated Depreciation & Amortization	12,051
Cornerstone Plaza | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	8,245
Buildings & Improvements	80,633
Cost Capitalized Subsequent to Acquisition
Improvements	7,135
Gross Carrying Amount
Land	8,263
Buildings & Improvements	87,750
Total	96,013
Accumulated Depreciation & Amortization	30,052
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	55,246
Gross Carrying Amount
Land	15,653
Buildings & Improvements	96,593
Total	112,246
Accumulated Depreciation & Amortization	35,614
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	47,991
Gross Carrying Amount
Land	6,165
Buildings & Improvements	70,244
Total	76,409
Accumulated Depreciation & Amortization	26,809
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	94,108
Gross Carrying Amount
Land	15,533
Buildings & Improvements	150,664
Total	166,197
Accumulated Depreciation & Amortization	53,418
Executive Tower | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	6,660
Buildings & Improvements	32,045
Cost Capitalized Subsequent to Acquisition
Improvements	59,549
Gross Carrying Amount
Land	9,471
Buildings & Improvements	88,783
Total	98,254
Accumulated Depreciation & Amortization	34,753
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	3,635
Gross Carrying Amount
Land	12,092
Buildings & Improvements	84,739
Total	96,831
Accumulated Depreciation & Amortization	13,474
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	49,327
Gross Carrying Amount
Land	5,119
Buildings & Improvements	61,886
Total	67,005
Accumulated Depreciation & Amortization	23,283
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	48,087
Gross Carrying Amount
Land	12,060
Buildings & Improvements	77,079
Total	89,139
Accumulated Depreciation & Amortization	24,518
Honolulu Club | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	1,863
Buildings & Improvements	16,766
Cost Capitalized Subsequent to Acquisition
Improvements	5,896
Gross Carrying Amount
Land	1,863
Buildings & Improvements	22,662
Total	24,525
Accumulated Depreciation & Amortization	9,089
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	67,669
Gross Carrying Amount
Land	13,070
Buildings & Improvements	169,944
Total	183,014
Accumulated Depreciation & Amortization	61,622
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	23,598
Gross Carrying Amount
Land	7,475
Buildings & Improvements	32,440
Total	39,915
Accumulated Depreciation & Amortization	10,883
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	33,600
Gross Carrying Amount
Land	7,503
Buildings & Improvements	52,654
Total	60,157
Accumulated Depreciation & Amortization	18,784
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	34,804
Gross Carrying Amount
Land	8,247
Buildings & Improvements	54,880
Total	63,127
Accumulated Depreciation & Amortization	19,807
One Westwood | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	10,350
Buildings & Improvements	29,784
Cost Capitalized Subsequent to Acquisition
Improvements	63,393
Gross Carrying Amount
Land	9,194
Buildings & Improvements	94,333
Total	103,527
Accumulated Depreciation & Amortization	34,093
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	54,541
Gross Carrying Amount
Land	9,664
Buildings & Improvements	65,677
Total	75,341
Accumulated Depreciation & Amortization	23,435
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	16,739
Gross Carrying Amount
Land	7,557
Buildings & Improvements	21,203
Total	28,760
Accumulated Depreciation & Amortization	8,044
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	(61)
Gross Carrying Amount
Land	7,055
Buildings & Improvements	11,974
Total	19,029
Accumulated Depreciation & Amortization	4,798
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	21,723
Gross Carrying Amount
Land	6,863
Buildings & Improvements	38,251
Total	45,114
Accumulated Depreciation & Amortization	13,974
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	36,308
Gross Carrying Amount
Land	7,421
Buildings & Improvements	48,541
Total	55,962
Accumulated Depreciation & Amortization	17,963
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	410,836
Gross Carrying Amount
Land	48,328
Buildings & Improvements	413,541
Total	461,869
Accumulated Depreciation & Amortization	150,971
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	122,044
Gross Carrying Amount
Land	15,015
Buildings & Improvements	189,734
Total	204,749
Accumulated Depreciation & Amortization	68,366
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	4,196
Gross Carrying Amount
Land	9,643
Buildings & Improvements	164,798
Total	174,441
Accumulated Depreciation & Amortization	20,889
The Trillium | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost
Land	20,688
Buildings & Improvements	143,263
Cost Capitalized Subsequent to Acquisition
Improvements	85,509
Gross Carrying Amount
Land	21,989
Buildings & Improvements	227,471
Total	249,460
Accumulated Depreciation & Amortization	80,180
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	104,500
Gross Carrying Amount
Land	11,737
Buildings & Improvements	168,881
Total	180,618
Accumulated Depreciation & Amortization	60,805
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	46,172
Gross Carrying Amount
Land	8,957
Buildings & Improvements	67,275
Total	76,232
Accumulated Depreciation & Amortization	24,902
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	15,131
Gross Carrying Amount
Land	5,111
Buildings & Improvements	19,705
Total	24,816
Accumulated Depreciation & Amortization	7,106
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	50,012
Gross Carrying Amount
Land	13,303
Buildings & Improvements	54,031
Total	67,334
Accumulated Depreciation & Amortization	19,444
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	421,607
Gross Carrying Amount
Land	59,418
Buildings & Improvements	697,446
Total	756,864
Accumulated Depreciation & Amortization	256,107
Warner Corporate Center | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	43,000
Initial Cost
Land	11,035
Buildings & Improvements	65,799
Cost Capitalized Subsequent to Acquisition
Improvements	335
Gross Carrying Amount
Land	11,035
Buildings & Improvements	66,134
Total	77,169
Accumulated Depreciation & Amortization	298
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	82,034
Gross Carrying Amount
Land	14,568
Buildings & Improvements	155,504
Total	170,072
Accumulated Depreciation & Amortization	56,383
Westwood Center | Operating Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	113,343
Initial Cost
Land	9,512
Buildings & Improvements	259,341
Cost Capitalized Subsequent to Acquisition
Improvements	12,344
Gross Carrying Amount
Land	9,513
Buildings & Improvements	271,684
Total	281,197
Accumulated Depreciation & Amortization	33,966
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	52,040
Gross Carrying Amount
Land	11,448
Buildings & Improvements	93,553
Total	105,001
Accumulated Depreciation & Amortization	33,866
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	40,435
Gross Carrying Amount
Land	14,903
Buildings & Improvements	59,632
Total	74,535
Accumulated Depreciation & Amortization	21,850
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	153,858
Gross Carrying Amount
Land	58,208
Buildings & Improvements	205,703
Total	263,911
Accumulated Depreciation & Amortization	75,202
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	656
Gross Carrying Amount
Land	5,720
Buildings & Improvements	10,708
Total	16,428
Accumulated Depreciation & Amortization	3,979
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	549
Gross Carrying Amount
Land	6,426
Buildings & Improvements	8,728
Total	15,154
Accumulated Depreciation & Amortization	3,340
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	421
Gross Carrying Amount
Land	2,605
Buildings & Improvements	3,684
Total	6,289
Accumulated Depreciation & Amortization	1,378
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	119,348
Gross Carrying Amount
Land	35,365
Buildings & Improvements	266,127
Total	301,492
Accumulated Depreciation & Amortization	47,725
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	74,021
Gross Carrying Amount
Land	27,816
Buildings & Improvements	72,455
Total	100,271
Accumulated Depreciation & Amortization	25,820
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	467
Gross Carrying Amount
Land	32,775
Buildings & Improvements	336,390
Total	369,165
Accumulated Depreciation & Amortization	6,028
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	199,491
Gross Carrying Amount
Land	60,555
Buildings & Improvements	233,936
Total	294,491
Accumulated Depreciation & Amortization	82,309
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	14,961
Gross Carrying Amount
Land	35,163
Buildings & Improvements	94,061
Total	129,224
Accumulated Depreciation & Amortization	38,965
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	1,502
Gross Carrying Amount
Land	26,864
Buildings & Improvements	120,775
Total	147,639
Accumulated Depreciation & Amortization	16,852
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
Buildings & Improvements	0
Total	23,848
Accumulated Depreciation & Amortization	0
1132 Bishop Street 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	16,818
Gross Carrying Amount
Land	0
Buildings & Improvements	16,818
Total	16,818
Accumulated Depreciation & Amortization	0
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	79,703
Gross Carrying Amount
Land	13,070
Buildings & Improvements	79,703
Total	92,773
Accumulated Depreciation & Amortization	0
Other Developments | 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	2,124
Gross Carrying Amount
Land	0
Buildings & Improvements	2,124
Total	2,124
Accumulated Depreciation & Amortization	$ 0

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Investment in real estate, gross [Roll Forward]
Beginning balance	$ 10,030,708	$ 9,829,208	$ 8,998,120
Property acquisitions	368,698	0	707,120
Consolidation of JV	924,578	0	0
Improvements and developments	242,854	277,229	177,655
Removal of fully depreciated and amortized tenant improvements and lease intangibles	(88,205)	(75,729)	(53,687)
Ending balance	11,478,633	10,030,708	9,829,208
Accumulated depreciation and amortization [Roll Forward]
Beginning balance	(2,246,887)	(2,012,752)	(1,789,678)
Depreciation and amortization	(357,743)	(309,864)	(276,761)
Other accumulated depreciation and amortization	(1,990)	0	0
Removal of fully depreciated and amortized tenant improvements and lease intangibles	88,205	75,729	53,687
Ending balance	(2,518,415)	(2,246,887)	(2,012,752)
Investment in real estate, net	$ 8,960,218	$ 7,783,821	$ 7,816,456

Uncategorized Items - a2019q410

Label	Element	Value
Accounting Standards Update 2017-12 [Member] | AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 211,000
Accounting Standards Update 2017-12 [Member] | Accumulated Distributions in Excess of Net Income [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (211,000)