Douglas Emmett (DEI) 10-K 15 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Feb. 08, 2019	Jun. 29, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	Douglas Emmett Inc
Entity Central Index Key	1,364,250
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Shares Outstanding		170,222,822
Entity Public Float			$ 6,470
Entity Well-known Seasoned Issuer	Yes
Entity Shell Company	false
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Investment in real estate:
Land	$ 1,065,099	$ 1,062,345
Buildings and improvements	7,995,203	7,886,201
Tenant improvements and lease intangibles	840,653	756,190
Property under development	129,753	124,472
Investment in real estate, gross	10,030,708	9,829,208
Less: accumulated depreciation and amortization	(2,246,887)	(2,012,752)
Investment in real estate, net	7,783,821	7,816,456
Cash and cash equivalents	146,227	176,645
Tenant receivables, net	4,371	2,980
Deferred rent receivables, net	124,834	106,021
Acquired lease intangible assets, net	3,251	4,293
Interest rate contract assets	73,414	60,069
Investment in unconsolidated real estate funds	111,032	107,735
Other assets	14,759	18,442
Total Assets	8,261,709	8,292,641
Liabilities
Secured notes payable and revolving credit facility, net	4,134,030	4,117,390
Interest payable, accounts payable and deferred revenue	130,154	103,947
Security deposits	50,733	50,414
Acquired lease intangible liabilities, net	52,569	75,635
Interest rate contract liabilities	1,530	807
Dividends payable	44,263	42,399
Total liabilities	4,413,279	4,390,592
Douglas Emmett, Inc. stockholders' equity:
Common Stock, $0.01 par value, 750,000,000 authorized, 170,214,809 and 169,564,927 outstanding at December 31, 2018 and December 31, 2017, respectively	1,702	1,696
Additional paid-in capital	3,282,316	3,272,539
Accumulated other comprehensive income	53,944	43,099
Accumulated deficit	(935,630)	(879,810)
Total Douglas Emmett, Inc. stockholders' equity	2,402,332	2,437,524
Noncontrolling interests	1,446,098	1,464,525
Total equity	3,848,430	3,902,049
Total Liabilities and Equity	$ 8,261,709	$ 8,292,641

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
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)	170,214,809	169,564,927

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Revenues	$ 881,316	$ 812,052	$ 742,551
Operating Expenses
General and administrative	38,641	36,234	34,957
Depreciation and amortization	309,864	276,761	248,914
Total operating expenses	629,372	571,029	521,734
Operating income	251,944	241,023	220,817
Other income	11,414	9,712	8,759
Other expenses	(7,472)	(7,037)	(9,477)
Income, including depreciation, from unconsolidated real estate funds	6,400	5,905	7,812
Interest expense	(133,402)	(145,176)	(146,148)
Demolition expenses	(272)	0	0
Income before gains	128,612	104,427	81,763
Gains on sales of investments in real estate	0	0	14,327
Net income	128,612	104,427	96,090
Less: Net income attributable to noncontrolling interests	(12,526)	(9,984)	(10,693)
Net income attributable to common stockholders	$ 116,086	$ 94,443	$ 85,397
Net income attributable to common stockholders per share – basic (usd per share)	$ 0.68	$ 0.58	$ 0.57
Net income attributable to common stockholders per share – diluted (usd per share)	$ 0.68	$ 0.58	$ 0.55
Office rental
Revenues
Revenues	$ 777,931	$ 715,546	$ 645,633
Operating Expenses
Operating expenses	252,751	233,633	214,546
Office rental | Rental revenues and tenant recoveries
Revenues
Revenues	661,147	606,852	545,061
Office rental | Parking and other income
Revenues
Revenues	116,784	108,694	100,572
Multifamily rental
Revenues
Revenues	103,385	96,506	96,918
Operating Expenses
Operating expenses	28,116	24,401	23,317
Multifamily rental | Rental revenues
Revenues
Revenues	95,423	89,039	89,996
Multifamily rental | Parking and other income
Revenues
Revenues	$ 7,962	$ 7,467	$ 6,922

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 128,612	$ 104,427	$ 96,090
Other comprehensive income: cash flow hedges	15,070
Other comprehensive income: cash flow hedges		34,290	40,474
Comprehensive income	143,682	138,717	136,564
Less: Comprehensive income attributable to noncontrolling interests	(16,751)	(16,331)	(26,726)
Comprehensive income attributable to common stockholders	$ 126,931	$ 122,386	$ 109,838

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, 2015		146,919,000
Stockholders' Equity [Roll Forward]
Conversion of OP Units (in shares)	1,800,000	1,753,000
Issuance of common stock (in shares)	1,400,000	1,400,000
Exercise of stock options (in shares)	7,566,000	1,458,000
Ending balance (in shares) at Dec. 31, 2016		151,530,000
Beginning balance at Dec. 31, 2015	$ 2,281,548	$ 1,469	$ 2,706,753	$ (9,285)	$ (772,726)	$ 355,337
Stockholders' Equity [Roll Forward]
Conversion of OP Units		17	23,043			(23,060)
Net income	96,090					10,693
Cash flow hedge fair value adjustments	40,474			24,441		16,033
Issuance of common stock, net	49,379	14	49,365
Repurchase of OP Units with cash	(826)		(498)			(328)
Exercise of stock options		15
Taxes paid on exercise of stock options	(53,491)		(53,506)
Contributions	459,752					459,752
Sales of equity interests in consolidated JVs	291,028					291,028
Net income attributable to common stockholders	85,397				85,397
Dividends	(133,356)				(133,356)
Distributions	(35,478)					(35,478)
Stock-based compensation	18,951					18,951
Ending balance at Dec. 31, 2016	$ 3,014,071	$ 1,515	2,725,157	15,156	(820,685)	1,092,928
Stockholders' Equity [Roll Forward]
Dividends declared per common share (usd per share)	$ 0.89
Conversion of OP Units (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	169,564,927	169,565,000
Stockholders' Equity [Roll Forward]
Conversion of OP Units		$ 11	14,231			(14,242)
Net income	$ 104,427					9,984
Cash flow hedge fair value adjustments	34,290			27,943		6,347
Issuance of common stock, net	593,168	157	593,011
Issuance of OP Units for acquisition of real estate	105,687					105,687
Repurchase of OP Units with cash	(10,104)		(6,763)			(3,341)
Exercise of stock options		13
Taxes paid on exercise of stock options	(53,084)		(53,097)
Contributions	284,248					284,248
Net income attributable to common stockholders	94,443				94,443
Dividends	(153,568)				(153,568)
Distributions	(38,101)					(38,101)
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 (usd per share)	$ 0.94
Conversion of OP Units (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]
Conversion of OP Units		$ 6	10,286			(10,292)
Net income	$ 128,612					12,526
Cash flow hedge fair value adjustments	14,859			10,634		4,225
Repurchase of OP Units with cash	(108)		(59)			(49)
Taxes paid on exercise of stock options	(450)		(450)
Net income attributable to common stockholders	116,086				116,086
Dividends	(171,695)				(171,695)
Distributions	(52,142)					(52,142)
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 (usd per share)	$ 1.01

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net income	$ 128,612	$ 104,427	$ 96,090
Adjustments to reconcile net income to net cash provided by operating activities:
Income, including depreciation, from unconsolidated real estate funds	(6,400)	(5,905)	(7,812)
Gains on sales of investments in real estate	0	0	(14,327)
Depreciation and amortization	309,864	276,761	248,914
Net accretion of acquired lease intangibles	(22,025)	(18,006)	(18,198)
Straight-line rent	(18,813)	(12,855)	(13,599)
Increase in the allowance for doubtful accounts	2,154	406	422
Deferred loan costs amortized and written off	8,292	10,834	8,927
Amortization of loan premium	(205)	0	0
Non-cash market value adjustments on interest rate contracts	0	51	(196)
Amortization of stock-based compensation	22,299	18,478	17,448
Operating distributions from unconsolidated real estate funds	6,400	5,905	2,668
Change in working capital components:
Tenant receivables	(3,545)	(1,221)	(680)
Interest payable, accounts payable and deferred revenue	1,376	24,942	10,712
Security deposits	319	4,424	7,307
Other assets	4,654	(5,544)	1,773
Net cash provided by operating activities	432,982	402,697	339,449
Investing Activities
Capital expenditures for improvements to real estate	(179,062)	(108,326)	(91,826)
Capital expenditures for developments	(68,459)	(63,018)	(27,720)
Property acquisitions	0	(537,669)	(1,619,759)
Proceeds from sale of investments in real estate, net	0	0	348,203
Loan payments received from related parties	0	0	763
Acquisition of additional interests in unconsolidated real estate funds	(9,379)	(4,142)	0
Capital distributions from unconsolidated real estate funds	7,349	43,560	24,170
Net cash used in investing activities	(249,551)	(669,595)	(1,366,169)
Financing Activities
Proceeds from borrowings	667,000	1,410,500	2,109,500
Repayment of borrowings	(655,326)	(1,698,544)	(1,335,580)
Loan cost payments	(2,992)	(11,442)	(24,586)
Contributions from noncontrolling interests in consolidated JVs	0	284,248	459,752
Distributions paid to noncontrolling interests	(52,142)	(38,101)	(35,478)
Dividends paid to common stockholders	(169,831)	(146,026)	(130,821)
Taxes paid on exercise of stock options	(450)	(53,084)	(53,491)
Repurchase of OP Units	(108)	(10,104)	(826)
Proceeds from issuance of common stock, net	0	593,169	49,379
Net cash (used in) provided by financing activities and restricted cash	(213,849)	330,616	1,037,849
(Decrease) increase in cash and cash equivalents	(30,418)	63,718	11,129
Cash and cash equivalents and restricted cash - beginning balance	176,766	113,048	101,919
Cash and cash equivalents and restricted cash - ending balance	146,348	176,766	113,048
Operating Activities
Cash paid for interest, net of capitalized interest	124,487	135,824	137,884
Capitalized interest paid	3,520	2,745	1,193
Non-cash Investing Transactions
Accrual for real estate and development capital expenditures	24,702	3,776	7,182
Capitalized stock-based compensation for improvements to real estate and developments	5,006	2,537	1,503
Removal of fully depreciated and amortized tenant improvements and lease intangibles	75,729	53,687	146,739
Removal of fully amortized acquired lease intangible assets	1,582	414	1,306
Removal of fully accreted acquired lease intangible liabilities	15,431	5,057	56,278
Issuance of OP Units for acquisition of real estate	0	105,687	0
Application of deposit to acquisition of real estate	0	0	75,000
Non-cash Financing Transactions
Gain recorded in AOCI - Adoption of ASU 2017-12 - consolidated derivatives	211	0	0
Gain recorded in AOCI	22,723
Gain recorded in AOCI		16,512	14,192
Assumption of term loan for acquisition of real estate	0	36,460	0
Dividends declared	171,695	153,568	133,356
Common stock issued in exchange for OP Units	10,292	14,242	23,060
Unconsolidated Funds
Non-cash Financing Transactions
Gain recorded in AOCI	$ 3,052
Gain recorded in AOCI		$ 3,275	$ 8

Overview

Overview	12 Months Ended
	Dec. 31, 2018
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 Funds, 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 financial statements refer to Douglas Emmett, Inc. and its subsidiaries on a consolidated basis. At December 31, 2018 , our Consolidated Portfolio consisted of (i) a 16.6 million square foot office portfolio, (ii) 3,595 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 equity interests in unconsolidated Funds which, at December 31, 2018 , owned an additional 1.8 million square feet of office space. We manage our unconsolidated Funds alongside our Consolidated Portfolio, and we therefore present the statistics for our office portfolio on a Total Portfolio basis. As of December 31, 2018 , our portfolio (not including two parcels of land from which we receive rent under ground leases), consisted of the following office and multifamily properties (both of which include ancillary retail space): Consolidated Portfolio Total Portfolio Office Wholly-owned properties 53 53 Consolidated JV properties 10 10 Unconsolidated Fund properties — 8 63 71 Multifamily Wholly-owned properties 10 10 Total 73 81 Basis of Presentation The accompanying 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. Our Operating Partnership and consolidated JVs are VIEs of which we are the primary beneficiary. As of December 31, 2018 , the total consolidated assets, liabilities and equity of the VIEs was $8.26 billion (of which $7.78 billion related to investment in real estate), $4.41 billion and $3.85 billion (of which $1.45 billion related to noncontrolling interests), respectively. During the current reporting period, we reported our office rental revenues and tenant recoveries on a combined basis as Rental revenues and tenant recoveries in our consolidated statements of operations and we reclassified the comparable periods to conform to the current period presentation. The accompanying 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 financial statements include, in our opinion, all adjustments, consisting of normal recurring adjustments, necessary to present fairly the financial information set forth therein. Any reference 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 financial statements in accordance with the standards of the PCAOB.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Use of Estimates The preparation of financial statements in conformity with 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 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, which includes the capitalized transaction costs, 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, based upon our estimates of expected future cash flows and other valuation techniques. Our estimates are based upon expected future cash flows and other valuation techniques. 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. 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, 2018 and 2017 , we did not have any properties held for sale. Dispositions Recognition of gains or losses from sales of investments in real estate requires that we meet certain revenue recognition criteria and transfer control of the real estate to the buyer. The gain or loss recorded is measured as the difference between the sales price, less costs to sell, and the carrying value of the real estate when we sell it. See Note 3 for our property disposition disclosures. Cost capitalization Costs incurred during the period of construction of real estate are capitalized. Cost capitalization of development and redevelopment activities begins during the predevelopment period, which we define as the activities that are necessary to begin the development of the property. We cease capitalization upon substantial completion of the project, but no later than one year from cessation of major construction activity. We also cease capitalization when activities necessary to prepare the property for its intended use have been suspended. Capitalized costs are included in 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 2018 , 2017 and 2016 , we capitalized $78.7 million , $66.0 million and $31.6 million of costs related to our developments, respectively, which included $3.5 million , $2.7 million and $1.2 million of capitalized interest, respectively. Investment in Unconsolidated Real Estate Funds We manage and hold equity interests in three Funds: Fund X, Partnership X and the Opportunity Fund. As of December 31, 2018 , we held direct and indirect equity interests of 71.3% of Fund X, 24.5% of Partnership X and 6.2% of the Opportunity Fund. We account for our investments in the Funds using the equity method because we have significant influence but not control over the Funds, and our Funds do not qualify as VIEs. Our investment balance includes our share of the net assets of the combined Funds, acquisition basis difference, additional basis for capital raising costs, our share of our Funds' accumulated other comprehensive income (loss) related to our Funds' derivatives, and notes receivable from our Funds. As of December 31, 2018 and 2017 , the total basis difference was $2.2 million and $2.9 million , respectively. See Note 5 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 2018 , 2017 or 2016 . Cash and Cash Equivalents We consider short-term investments with maturities of three months or less when purchased to be cash equivalents. Revenue Recognition 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 $18.8 million , $12.9 million and $13.6 million during 2018 , 2017 and 2016 , 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 $1.6 million , $2.1 million and $2.4 million during 2018 , 2017 and 2016 , 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 leasehold improvements of $3.5 million , $2.6 million and $2.6 million during 2018 , 2017 and 2016 , 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. 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 in the first quarter of 2018 on a prospective basis. See "Adopted ASUs" further below. The 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 $102.5 million , $96.2 million and $88.8 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. Office parking receivables were $1.1 million and $1.0 million as of December 31, 2018 and 2017 , respectively, and are included in Tenant receivables in our consolidated balance sheets. Allowances for Tenant Receivables and Deferred Rent Receivables We present 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 consider 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: (In thousands) December 31, 2018 December 31, 2017 Allowance for tenant receivables $ 5,215 $ 3,062 Allowance for deferred rent receivables $ 2,849 $ 3,405 Letters of credit from our tenants $ 27,749 $ 25,212 Cash security deposits from our tenants $ 50,733 $ 50,414 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 2016 Tenant receivables allowance - decrease in net income $ (2,154 ) $ (406 ) $ (422 ) Deferred rent receivables allowance - increase in net income $ 556 $ 1,739 $ 898 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. 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 7 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, on a straight-line basis 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 and cap 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. In limited instances, we also make use of interest rate caps to limit our exposure to interest rate increases on our floating-rate debt. We do not speculate in derivatives and we do not make use of any other derivative instruments. We adopted ASU No. 2017-12 on a prospective basis in the first quarter of 2018 - see "Adopted ASUs" further below. 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, including depreciation, from unconsolidated real estate funds, as interest payments are made by our Funds on their hedged floating rate debt. Changes in fair value of hedging instruments not designated as cash flow hedges are recorded as interest expense. 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 real estate funds on our consolidated balance sheet. See Note 9 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 12 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 11 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 14 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 regular corporate rates, 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 2018 , 2017 or 2016 . 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 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 2018 that we expect to be applicable and have a material impact on our financial statements. Adopted ASUs During 2018 we adopted the ASUs listed below: Revenue from Contracts with Customers In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers" (Topic 606), which provides guidance for the accounting of revenue from contracts with customers, and supersedes Topic 605, "Revenue Recognition", and most industry-specific guidance throughout the industry topics of the Codification. In March 2016, the FASB issued ASU No. 2016-08, "Principal versus Agent Considerations (Reporting Revenue Gross versus Net)", which amends Topic 606 and clarifies the guidance for principal versus agent considerations. In April 2016, the FASB issued ASU No. 2016-10, "Identifying Performance Obligations and Licensing" which amends Topic 606 and provides guidance for identifying performance obligations and licensing. In May 2016, the FASB issued ASU No. 2016-12, "Narrow-Scope Improvements and Practical Expedients" which amends Topic 606 and provides guidance for a variety of revenue recognition related topics. In February 2017, the FASB issued ASU No. 2017-05 "Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets" (Subtopic 610-20), which provides guidance for recognizing gains and losses from the transfer of nonfinancial assets in contracts with non-customers. Sales of real estate are now accounted for under Subtopic 610-20 which focuses on a transfer of control. The amendments in these ASUs were effective in the first quarter of 2018 and were required to be applied on a retrospective basis. We adopted the ASU in the first quarter of 2018 and it did not have a material impact on our financial statements. Most of our revenues are derived from lease contracts with tenants and are not within the scope of the respective ASUs. Although our office parking revenues are within the scope of the respective ASUs, the timing and pattern of revenue recognition was not impacted. Derivatives and Hedging In August 2017, the FASB issued ASU No. 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities". The ASU requires the entire change in the fair value of the hedging instrument included in the assessment of hedge effectiveness be recorded in other comprehensive income. GAAP historically provided special hedge accounting only for the portion of the hedge deemed to be “highly effective” and requires an entity to separately reflect the amount by which the hedging instrument does not offset the hedged item, which is referred to as the “ineffective” amount. The amendments are effective in the first quarter of 2019 and are required to be applied on a prospective basis. We early adopted the ASU in the first quarter of 2018 and it did not have a material impact on our financial statements. The ASU requires the cumulative effect of initially applying the ASU as an adjustment to AOCI with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year in which the ASU is adopted. On January 1, 2018, we recorded such an adjustment to AOCI and accumulated deficit of $211 thousand . See Note 10 . ASUs Not Yet Adopted Leases In February 2016, the FASB issued ASU No. 2016-02, "Leases" (Topic 842). The primary difference between Topic 842 and current GAAP is the recognition of lease assets and liabilities on the balance sheet by lessees for leases classified as operating leases under current GAAP. The accounting applied by lessors is largely unchanged from current GAAP, for example, the vast majority of operating leases will remain classified as operating leases, and lessors will continue to recognize lease income for those leases on a straight-line basis over the lease term. Topic 842 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 should be accounted for in accordance with Topic 842. 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. Based on our preliminary assessment, we expect that operating leases for which we are the lessor will qualify for the single component presentation, and we therefore expect to elect adoption of this practical expedient. Topic 842 defines initial direct costs of a lease (which we have historically 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 capitalized $7.9 million of leasing costs during the year ended December 31, 2018 that would not qualify as initial direct costs and would be expensed under Topic 842. The expensing of those costs, adjusted for amortization expense, would have reduced net income attributable to common stockholders by $6.0 million for the year ended December 31, 2018 . We pay rent under a ground lease which expires on December 31, 2086 . See Note 16 for more information regarding this ground lease. We currently account for the lease as an operating lease. We expect to recognize a right-of-use asset and lease liability for this ground lease in the first quarter of 2019 when we adopt the ASU. We do not expect the change in accounting for the ground lease to have a material impact on our financial position or results of operations. The treatment of our revenues could be impacted by Topic 842, however, we do not expect any impact to be material to our financial statements. In December 2018, the FASB issued ASU 2018-20, an update to ASC Topic 842, Leases , 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 do not expect the ASU to have a material impact on our financial statements. The ASUs are effective in the first quarter of 2019 and are required to be adopted using either a) a modified retrospective approach which results in a cumulative adjustment to the opening balance of retained earnings (accumulated deficit) on January 1, 2017, and restatement of the amounts presented prior to January 1, 2019 for leases that existed or were entered into after January 1, 2017, the beginning of the earliest comparative period presented in the 2019 consolidated financial statements, or b) a modified retrospective transition method which results in a cumulative adjustment to the opening balance of retained earnings (accumulated deficit) on January 1, 2019 for leases that existed or were entered into prior to January 1, 2019, the effective date of the ASU. All leases entered into on or after January 1, 2019 would be accounted for as prescribed by ASC 842. ASC 842 provides a practical expedient package that allows entities to not (a) reassess whether any expired or existing contracts are considered or contain leases; (b) reassess the lease classification for any expired or existing leases; and (c) reassess initial direct costs for any existing leases. The Company plans to elect the modified retrospective transition method for adoption on January 1, 2019 and expects to elect the use of the practical expedient package described above. We plan to adopt the ASUs in the first quarter of 2019.

Investment in Real Estate

Investment in Real Estate	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Investment in Real Estate	Investment in Real Estate We account for our property acquisitions as asset acquisitions. Prior to January 1, 2017, we accounted for our property acquisitions as business combinations. The acquired properties results of operations are included in our results of operations from the respective acquisition dates. 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 10 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 7 for more information. 2016 Acquisitions Westwood Portfolio Acquisition On February 29, 2016 (Acquisition Date), a consolidated JV which we manage and in which we own an equity interest acquired four Class A office properties located in Westwood, California (Westwood Portfolio) for a contract price of $1.34 billion . As of the Acquisition Date, we had contributed sixty -percent of the equity to the JV, which was subsequently reduced to thirty -percent on May 31, 2016 (Sell Down Date) when we sold half of our ownership interest to a third party investor. The table below summarizes our purchase accounting and funding sources for the acquisition. The contract and purchase price differ due to prorations and similar matters. (in thousands) Actual at Closing (1) Pro Forma Sell Down Adjustments (2) Pro Forma Building square footage 1,725 1,725 Use of funds: Land $ 94,996 $ 94,996 Buildings and improvements 1,236,786 1,236,786 Tenant improvements and lease intangibles 50,439 50,439 Acquired above- and below-market leases, net (3) (49,708 ) (49,708 ) Net assets and liabilities acquired $ 1,332,513 $ 1,332,513 Source of funds: Cash on hand (4) $ 153,745 $ — $ 153,745 Credit facility (5) 290,000 (240,000 ) 50,000 Non-recourse term loan, net (6) 568,768 — 568,768 Noncontrolling interests 320,000 240,000 560,000 Total source of funds $ 1,332,513 $ — $ 1,332,513 ________________________________________________ (1) Reflects the purchase of the Westwood Portfolio on the Acquisition Date when we contributed sixty -percent of the equity to the consolidated JV. (2) Reflects our sale of thirty -percent of the equity in the JV on the Sell Down Date, presented as of the Acquisition Date, treated as in-substance real estate, which reduced our ownership interest in the JV to thirty -percent. We sold the interest for the $240.0 million we contributed plus an additional $1.1 million to compensate us for the cost of holding the investment. We recognized a gain on the sale of $1.1 million . We used the proceeds from the sale to pay down the balance owed on our revolving credit facility. (3) As of the Acquisition Date, the weighted average remaining life of the acquired above- and below-market leases was approximately 4.4 years . (4) Cash paid included a $75.0 million deposit, $67.5 million paid at closing, and $11.2 million spent on loan costs in connection with securing the $580.0 million term loan. (5) Reflects borrowings using our credit facility, which bears interest at LIBOR + 1.40% . See Note 7 for information regarding our credit facility. (6) Reflects 100% (not our pro rata share) of a $580.0 million interest-only non-recourse loan, net of deferred loan costs of $11.2 million incurred to secure the loan. The loan has a seven -year term and is secured by the Westwood Portfolio. Interest on the loan is floating at LIBOR + 1.40% , which has been effectively fixed at 2.37% per annum for five years through interest rate swaps. See Note 7 for information regarding this loan. The table below presents the revenues and net income attributable to common stockholders from the Westwood Portfolio included in the consolidated statement of operations from the Acquisition Date: Year Ended December 31, (in thousands) 2018 2017 2016 Total office revenues $ 102,398 $ 96,106 $ 80,464 Net income attributable to common stockholders (1) $ 6,163 $ 6,346 $ 2,998 ______________________________________________________ (1) Excluding transaction costs, net income attributable to common stockholders was $6.2 million , $6.3 million and $5.0 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. The table below presents the historical results of Douglas Emmett, Inc. and the Westwood Portfolio on a combined basis as if the acquisition was completed on January 1, 2016, based on our thirty -percent ownership interest and includes adjustments that give effect to events that are (i) directly attributable to the acquisition, (ii) expected to have a continuing impact on us, and (iii) are factually supportable. The pro forma reflects the hypothetical impact of the acquisition on us and does not purport to represent what our results of operations would have been had the acquisition occurred on January 1, 2016, or project the results of operations for any future period. The information does not reflect cost savings or operating synergies that may result from the acquisition or the costs to achieve any such potential cost savings or operating synergies. Transaction costs related to the acquisition have been excluded. Year Ended December 31, (in thousands, except per share information) 2016 Pro forma revenues $ 755,878 Pro forma net income attributable to common stockholders $ 84,319 Pro forma net income attributable to common stockholders per share – basic $ 0.56 Pro forma net income attributable to common stockholders per share – diluted $ 0.55 Other 2016 Acquisitions During 2016, a consolidated JV which we manage and in which we own an equity interest acquired two Class A office properties. As of July 21, 2016 , we had contributed fifty-five percent of the equity to the JV, which was reduced to twenty -percent when we sold thirty-five percent to a third party investor for $51.6 million , which included $194 thousand to compensate us for the cost of holding the investment. We recognized a gain of $587 thousand on the sale, which is included in Gains on sales of investments in real estate in our consolidated statements of operations. In addition to purchasing a thirty-five percent interest from us, investors contributed $139.8 million to the JV. Including the effect of the sale of our interest, investors now hold an aggregate of eighty -percent of the capital interests in the JV. As part of the acquisitions, the JV borrowed a $146.0 million under a three year, interest only, non-recourse loan bearing interest at LIBOR + 1.55% . The loan was secured by the acquired properties. The loan was refinanced in 2017. See Note 7 . The table below summarizes the purchase accounting for the acquisitions. The contract and purchase prices differ due to prorations and similar matters. (in thousands) 12100 Wilshire 233 Wilshire Submarket Brentwood Santa Monica Acquisition date July 21 September 27 Contract price $ 225,000 $ 139,500 Building square footage 365 129 Investment in real estate: Land $ 20,164 $ 9,263 Buildings and improvements 199,698 126,938 Tenant improvements and lease intangibles 9,057 3,488 Acquired above- and below-market leases, net (4,523 ) (1,838 ) Net assets and liabilities acquired $ 224,396 $ 137,851 2016 Disposition During 2016, we sold a 168,000 square foot Class A office property located in Sherman Oaks, California with a carrying value of $42.8 million for a contract price of $56.7 million , and we incurred transaction costs of $1.2 million resulting in a net gain of $12.7 million . The gain is included in Gains on sales of investments in real estate in our consolidated statements of operations.

Acquired Lease Intangibles

Acquired Lease Intangibles	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired Lease Intangibles	Acquired Lease Intangibles Summary of our Acquired Lease Intangibles (In thousands) December 31, 2018 December 31, 2017 Above-market tenant leases $ 5,595 $ 7,177 Above-market tenant leases - accumulated amortization (3,289 ) (3,846 ) Above-market ground lease where we are the lessor 1,152 1,152 Above-market ground lease - accumulated amortization (207 ) (190 ) Acquired lease intangible assets, net $ 3,251 $ 4,293 Below-market tenant leases $ 112,175 $ 127,606 Below-market tenant leases - accumulated accretion (63,013 ) (55,428 ) Above-market ground lease where we are the tenant 4,017 4,017 Above-market ground lease - accumulated accretion (610 ) (560 ) Acquired lease intangible liabilities, net $ 52,569 $ 75,635 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) 2018 2017 2016 Net accretion of above- and below-market tenant lease assets and liabilities (1) $ 21,992 $ 17,973 $ 18,165 Amortization of an above-market ground lease (2) (17 ) (17 ) (17 ) Accretion of an above-market ground lease liability (3) 50 50 50 Total $ 22,025 $ 18,006 $ 18,198 _______________________________________________________________________________________ (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. The table below presents the future net accretion related to our above- and below-market leases at December 31, 2018 . The above-market ground lease liability presented in the tables above will be offset against a right of use ground lease asset on January 1, 2019 when we adopt ASU No. 2016-02 - see Note 2, and there is therefore no future accretion for that lease reflected in the table below. Year ending December 31: Net increase to revenues (In thousands) 2019 $ 15,521 2020 12,516 2021 6,813 2022 4,157 2023 2,542 Thereafter 4,362 Total $ 45,911

Investments in Unconsolidated R

Investments in Unconsolidated Real Estate Funds	12 Months Ended
	Dec. 31, 2018
Real Estate Investments, Net [Abstract]
Investments in Unconsolidated Real Estate Funds	Investments in Unconsolidated Real Estate Funds Description of our Funds We manage and own equity interests in three unconsolidated Funds, the Opportunity Fund, Fund X and Partnership X, through which we and investors own eight office properties totaling 1.8 million square feet. During the third quarter of 2018 we purchased an additional 1.9% interest in Fund X. We purchased a 3.7% interest in the Opportunity Fund during the second quarter of 2017 and 2.5% during the fourth quarter of 2017. The Opportunity Fund's only investment is a 13.1% interest in Fund X. At December 31, 2018 , we held direct and indirect equity interests of 6.2% in the Opportunity Fund, 71.3% of Fund X and 24.5% of Partnership X. Our Funds pay us fees and reimburse us for certain expenses related to property management and other services we provide. 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 received from our Funds: Year Ended December 31, (In thousands) 2018 2017 2016 Operating distributions received $ 6,400 $ 5,905 $ 2,668 Capital distributions received 7,349 43,560 24,170 Total distributions received $ 13,749 $ 49,465 $ 26,838 Summarized Financial Information for our Funds The tables below present selected financial information for the Funds on a combined basis. 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, 2018 December 31, 2017 Total assets $ 694,713 $ 704,186 Total liabilities $ 525,483 $ 523,767 Total equity $ 169,230 $ 180,419 Year Ended December 31, (In thousands) 2018 2017 2016 Total revenues $ 79,590 $ 75,896 $ 73,171 Operating income $ 22,959 $ 20,640 $ 19,477 Net income $ 6,260 $ 5,085 $ 8,213

Other Assets

Other Assets	12 Months Ended
	Dec. 31, 2018
Other Assets [Abstract]
Other Assets	Other Assets (In thousands) December 31, 2018 December 31, 2017 Restricted cash $ 121 $ 121 Prepaid expenses 7,830 9,235 Other indefinite-lived intangibles 1,988 1,988 Furniture, fixtures and equipment, net 1,101 1,155 Other 3,719 5,943 Total other assets $ 14,759 $ 18,442

Secured Notes Payable and Revol

Secured Notes Payable and Revolving Credit Facility, Net	12 Months Ended
	Dec. 31, 2018
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, 2018 Principal Balance as of December 31, 2017 Variable Interest Rate Fixed Interest Rate (2) Swap Maturity Date (In thousands) Wholly Owned Subsidiaries Term loan (3) — $ — $ 146,974 — — — Term loan (3) — — 280,721 — — — Fannie Mae loan 10/1/2019 145,000 145,000 LIBOR + 1.25% N/A N/A Term loan (4) 4/15/2022 340,000 340,000 LIBOR + 1.40% 2.77% 4/1/2020 Term loan (4) 7/27/2022 180,000 180,000 LIBOR + 1.45% 3.06% 7/1/2020 Term loan (4) 11/1/2022 400,000 400,000 LIBOR + 1.35% 2.64% 11/1/2020 Term loan (4) 6/23/2023 360,000 360,000 LIBOR + 1.55% 2.57% 7/1/2021 Term loan (4) 12/23/2023 220,000 220,000 LIBOR + 1.70% 3.62% 12/23/2021 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 — LIBOR + 1.30% 3.84% 3/1/2023 Fannie Mae loan (4) 4/1/2025 102,400 102,400 LIBOR + 1.25% 2.84% 3/1/2020 Fannie Mae loan (4) 12/1/2025 115,000 115,000 LIBOR + 1.25% 2.76% 12/1/2020 Fannie Mae loan (4) 6/1/2027 550,000 550,000 LIBOR + 1.37% 3.16% 6/1/2022 Term loan (5) 6/1/2038 31,582 32,213 N/A 4.55% N/A Revolving credit facility (6) 8/21/2020 105,000 — LIBOR + 1.40% N/A N/A Total Wholly Owned Subsidiary Debt 3,183,982 3,172,308 Consolidated JVs Term loan (4) 2/28/2023 580,000 580,000 LIBOR + 1.40% 2.37% 3/1/2021 Term loan (4) 12/19/2024 400,000 400,000 LIBOR + 1.30% 3.47% 1/1/2023 Total Consolidated Debt (7) 4,163,982 4,152,308 Unamortized loan premium, net 3,986 4,191 Unamortized deferred loan costs, net (33,938 ) (39,109 ) Total Consolidated Debt, net $ 4,134,030 $ 4,117,390 _____________________________________________________ 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. (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 9 for details of our interest rate swaps. See below for details of our loan costs. (3) At December 31, 2018 , 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) Requires monthly payments of principal and interest. Principal amortization is based upon a 30 -year amortization schedule. (6) $400.0 million revolving credit facility. Unused commitment fees range from 0.15% to 0.20% . (7) See Note 13 for our fair value disclosures. Debt Statistics The following table summarizes our fixed and floating rate debt: (In thousands) Principal Balance as of December 31, 2018 Principal Balance as of December 31, 2017 Aggregate swapped to fixed rate loans $ 3,882,400 $ 3,547,400 Aggregate fixed rate loans 31,582 459,908 Aggregate floating rate loans 250,000 145,000 Total Debt $ 4,163,982 $ 4,152,308 The following table summarizes certain debt statistics: Statistics for consolidated loans with interest fixed under the terms of the loan or a swap Principal balance (in billions) $3.91 Weighted average remaining life (including extension options) 5.4 years Weighted average remaining fixed interest period 2.6 years Weighted average annual interest rate 3.07% Future Principal Payments At December 31, 2018 , the minimum future principal payments due on our 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) 2019 $ 145,718 $ 145,718 2020 400,752 105,752 2021 787 787 2022 1,040,823 920,823 2023 1,495,862 1,160,862 Thereafter 1,080,040 1,830,040 Total future principal payments $ 4,163,982 $ 4,163,982 ____________________________________________ (1) Our loan agreements generally 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 $24.2 million and $18.0 million at December 31, 2018 and December 31, 2017 , 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) 2018 2017 2016 Loan costs expensed $ 418 $ 2,359 $ 1,441 Deferred loan cost amortization 7,874 9,033 7,608 Total $ 8,292 $ 11,392 $ 9,049

Interest Payable, Accounts Paya

Interest Payable, Accounts Payable and Deferred Revenue	12 Months Ended
	Dec. 31, 2018
Accounts Payable and Accrued Liabilities [Abstract]
Interest Payable, Accounts Payable and Deferred Revenue	Interest Payable, Accounts Payable and Deferred Revenue (In thousands) December 31, 2018 December 31, 2017 Interest payable $ 10,657 $ 9,829 Accounts payable and accrued liabilities 75,111 62,741 Deferred revenue 44,386 31,377 Total interest payable, accounts payable and deferred revenue $ 130,154 $ 103,947

Derivative Contracts

Derivative Contracts	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Contracts	Derivative Contracts Derivative Summary As of December 31, 2018 , all of our interest rate swaps, which include the interest rate swaps of our consolidated JVs and our unconsolidated Funds, were designated as cash flow hedges: Number of Interest Rate Swaps Notional (In thousands) Consolidated derivatives (1)(3) 27 $ 3,882,400 Unconsolidated Funds' derivatives (2)(3) 4 $ 510,000 ___________________________________________________ (1) The notional amount reflects 100% , not our pro-rata share, of our consolidated JVs' derivatives. (2) The notional amount reflects 100% , not our pro-rata share, of our unconsolidated Funds' derivatives. (3) See Note 13 for our derivative fair value disclosures. Credit-risk-related Contingent Features We have agreements with each of our interest rate swap counterparties that contain a provision under which we could also be declared in default on our derivative obligations if we default on the underlying indebtedness that we are hedging. As of December 31, 2018 , there have been no events of default with respect to our interest rate swaps or our consolidated JVs' or unconsolidated Funds' interest rate swaps. 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, were as follows: (In thousands) December 31, 2018 December 31, 2017 Consolidated derivatives (1) $ 1,681 $ 915 Unconsolidated Funds' derivatives (2) $ — $ — ___________________________________________________ (1) Includes 100% , not our pro-rata share, of our consolidated JVs' derivatives. (2) Our unconsolidate d Funds' 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 , were as follows: (In thousands) December 31, 2018 December 31, 2017 Consolidated derivatives (1) $ 76,021 $ 60,093 Unconsolidated Funds' derivatives (2) $ 12,576 $ 9,350 ___________________________________________________ (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 Funds' derivatives. 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, 2018 2017 2016 Derivatives Designated as Cash Flow Hedges: Consolidated derivatives: Gain recorded in AOCI - adoption of ASU 2017-12 (1)(2) $ 211 $ — $ — Gain recorded in AOCI before reclassifications (1)(2) $ 22,723 $ 16,512 $ 14,192 (Gain) loss reclassified from AOCI to Interest Expense (1) $ (10,103 ) $ 13,976 $ 25,917 Interest Expense presented in the consolidated statements of operations $ (133,402 ) $ (145,176 ) $ (146,148 ) (Gain) loss related to ineffectiveness recorded in Interest Expense $ — $ 51 $ (196 ) Unconsolidated Funds' derivatives (our share) (3) : Gain recorded in AOCI before reclassifications (1) $ 3,052 $ 3,275 $ 8 (Gain) loss reclassified from AOCI to Income, including depreciation, from unconsolidated real estate funds (1) $ (813 ) $ 527 $ 357 Income, including depreciation, from unconsolidated real estate funds presented in the consolidated statements of operations $ 6,400 $ 5,905 $ 7,812 __________________________________________________ (1) See Note 10 for our AOCI reconciliation. (2) See Note 2 regarding the ASU adoption. (3) 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, 2018 , 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: Gains to be reclassified from AOCI to Interest Expense $ 36,161 Unconsolidated Funds' derivatives (our share): Gains to be reclassified from AOCI to Income, including depreciation, from unconsolidated real estate funds $ 2,565

Equity

Equity	12 Months Ended
	Dec. 31, 2018
Stockholders' Equity Attributable to Parent [Abstract]
Equity	Equity Transactions 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. 2016 Transactions During 2016 we (i) acquired 1.8 million OP Units in exchange for issuing an equal number of shares of our common stock to the holders of OP Units, (ii) acquired 25 thousand OP Units for $826 thousand in cash, (iii) issued 1.5 million shares of our common stock for the exercise of 7.6 million stock options on a net settlement basis (net of the exercise price and related taxes), (iv) issued 1.4 million shares of our common stock under our ATM program for net proceeds of 49.4 million . We also created two JVs to acquire various properties: (i) in the JV which acquired the Westwood Portfolio, investors acquired an aggregate of seventy -percent of the capital interests, as a result of contributing $320 million directly to the JV for a forty -percent interest and acquiring a thirty -percent interest from us for $241.1 million , (resulting in a gain of $1.1 million ), and (ii) in the second JV, which acquired two office properties, 12100 Wilshire and 233 Wilshire, investors acquired an aggregate of eighty -percent of the capital interests, as a result of contributing $139.8 million directly to the JV and acquiring a thirty-five -percent interest from us for $51.6 million (resulting in a gain of $587 thousand ). 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 consist of OP Units and fully-vested LTIP Units, and represented approximately 14% of our Operating Partnership's total interests as of December 31, 2018 when we and our Operating Partnership had 170.2 million shares of common stock and 28.2 million OP Units and fully-vested LTIP Units outstanding. 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 key employees and non-employee directors as part of their compensation, see Note 12 . 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) 2018 2017 2016 Net income attributable to common stockholders $ 116,086 $ 94,443 $ 85,397 Transfers from noncontrolling interests: Exchange of OP Units with noncontrolling interests 10,292 14,242 23,060 Repurchase of OP Units from noncontrolling interests (59 ) (6,764 ) (498 ) Net transfers from noncontrolling interests 10,233 7,478 22,562 Change from net income attributable to common stockholders and transfers from noncontrolling interests $ 126,319 $ 101,921 $ 107,959 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) 2018 2017 2016 Beginning balance $ 43,099 $ 15,156 $ (9,285 ) Adoption of ASU 2017-12 - cumulative opening balance adjustment (2) 211 — — Consolidated derivatives: Other comprehensive income before reclassifications 22,723 16,512 14,192 Reclassification of (gains) losses from AOCI to Interest Expense (10,103 ) 13,976 25,917 Unconsolidated Funds' derivatives (our share): Other comprehensive income before reclassifications 3,052 3,275 8 Reclassification of (gains) losses from AOCI to Income, including depreciation, from unconsolidated real estate funds (813 ) 527 357 Net current period OCI 15,070 34,290 40,474 OCI attributable to noncontrolling interests (4,225 ) (6,347 ) (16,033 ) OCI attributable to common stockholders 10,845 27,943 24,441 Ending balance $ 53,944 $ 43,099 $ 15,156 __________________________________________________ (1) See Note 9 for the details of our derivatives and Note 13 for our derivative fair value disclosures. (2) See Note 2 regarding our adoption of the ASU on January 1, 2018. Dividends (unaudited) Our common stock dividends paid during 2018 are classified for federal income tax purposes as follows: Record Date Paid Date Dividend Per Share Ordinary Income Percentage Capital Gain Percentage Return of Capital Percentage Amount Qualifying as a Section 199A Dividend 12/29/2017 1/15/2018 $ 0.25 32.5 % — % 67.5 % 32.5 % 3/29/2018 4/17/2018 0.25 32.5 % — % 67.5 % 32.5 % 6/29/2018 7/13/2018 0.25 32.5 % — % 67.5 % 32.5 % 9/28/2018 10/16/2018 0.25 32.5 % — % 67.5 % 32.5 % Total / Weighted Average $ 1.00 32.5 % — % 67.5 % 32.5 %

EPS

EPS	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
EPS	EPS The table below presents the calculation of basic and diluted EPS: Year Ended December 31, 2018 2017 2016 Numerator (In thousands): Net income attributable to common stockholders $ 116,086 $ 94,443 $ 85,397 Allocation to participating securities: Unvested LTIP Units (546 ) (626 ) (468 ) Numerator for basic and diluted net income attributable to common stockholders $ 115,540 $ 93,817 $ 84,929 Denominator (In thousands): Weighted average shares of common stock outstanding - basic 169,893 160,905 149,299 Effect of dilutive securities: Stock options (1) 9 325 3,891 Weighted average shares of common stock and common stock equivalents outstanding - diluted 169,902 161,230 153,190 Basic EPS: Net income attributable to common stockholders per share $ 0.68 $ 0.58 $ 0.57 Diluted EPS: Net income attributable to common stockholders per share $ 0.68 $ 0.58 $ 0.55 ____________________________________________________ (1) The following securities were excluded from the calculation of diluted EPS because including them would be anti-dilutive to the calculation: Year Ended December 31, (In thousands) 2018 2017 2016 OP Units 26,661 24,810 25,110 Vested LTIP Units 813 274 578

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [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 3.4 million shares available for grant as of December 31, 2018 . 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 898 thousand , 800 thousand and 704 thousand LTIP Units to employees during 2018 , 2017 and 2016 , 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 37 thousand , 28 thousand and 35 thousand LTIP Units to our non-employee directors during 2018 , 2017 and 2016 , respectively. Compensation Expense Total stock-based compensation expense, net of capitalized amounts, was $22.3 million , $18.5 million and $17.4 million during 2018 , 2017 and 2016 , respectively. Certain amounts of stock-based compensation expense are capitalized for employees who provide leasing and construction services. We capitalized $5.0 million , $2.5 million , and $1.5 million during 2018 , 2017 and 2016 , respectively. At December 31, 2018 , the total unrecognized stock-based compensation expense for unvested LTIP Unit awards was $19.4 million , which will be recognized over a weighted-average term of two years . Stock-Based Award Activity The table below presents our outstanding stock options activity: 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, 2015 11,535 $ 18.04 23 $ 151,569 Exercised (7,566 ) $ 20.98 $ 104,108 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 — 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, 2015 1,096 $ 19.85 Granted 739 $ 27.62 $ 20,420 Vested (778 ) $ 22.23 $ 17,293 Forfeited (17 ) $ 27.77 $ 473 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

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2018
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, 2018 , 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 7 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, 2018 December 31, 2017 Fair value $ 4,087,979 $ 4,195,489 Carrying value $ 4,062,968 $ 4,156,499 Financial instruments measured at fair value Derivative instruments: See Note 9 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, 2018 December 31, 2017 Derivative Assets: Fair value - c onsolidated derivatives (1) $ 73,414 $ 60,069 Fair value - unconsolidated Funds' derivatives (2) $ 12,228 $ 9,437 Derivative Liabilities: Fair value - c onsolidated derivatives (1) $ 1,530 $ 807 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 sheet. (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 real estate funds in our consolidated balance sheets. See Note 17 regarding our unconsolidated Funds debt and derivatives.

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2018
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, 2018 2017 2016 Office Segment Total office revenues $ 777,931 $ 715,546 $ 645,633 Office expenses (252,751 ) (233,633 ) (214,546 ) Office segment profit 525,180 481,913 431,087 Multifamily Segment Total multifamily revenues 103,385 96,506 96,918 Multifamily expenses (28,116 ) (24,401 ) (23,317 ) Multifamily segment profit 75,269 72,105 73,601 Total profit from all segments $ 600,449 $ 554,018 $ 504,688 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, 2018 2017 2016 Total profit from all segments $ 600,449 $ 554,018 $ 504,688 General and administrative (38,641 ) (36,234 ) (34,957 ) Depreciation and amortization (309,864 ) (276,761 ) (248,914 ) Other income 11,414 9,712 8,759 Other expenses (7,472 ) (7,037 ) (9,477 ) Income, including depreciation, from unconsolidated real estate funds 6,400 5,905 7,812 Interest expense (133,402 ) (145,176 ) (146,148 ) Demolition expenses (272 ) — — Income before gains 128,612 104,427 81,763 Gains on sales of investments in real estate — — 14,327 Net income 128,612 104,427 96,090 Less: Net income attributable to noncontrolling interests (12,526 ) (9,984 ) (10,693 ) Net income attributable to common stockholders $ 116,086 $ 94,443 $ 85,397

Future Minimum Lease Rental Rec

Future Minimum Lease Rental Receipts	12 Months Ended
	Dec. 31, 2018
Operating Leases, Future Minimum Payments Receivable [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, 2018 : Year Ending December 31, (In thousands) 2019 $ 578,162 2020 531,875 2021 437,528 2022 353,395 2023 269,535 Thereafter 656,926 Total future minimum base rentals (1) $ 2,827,421 _____________________________________________________ (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.

Future Minimum Lease Rental Pay

Future Minimum Lease Rental Payments	12 Months Ended
	Dec. 31, 2018
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Future Minimum Lease Rental Payments	Future Minimum Lease Rental Payments We pay rent under a ground lease which expires on December 31, 2086 . The rent is fixed at $733 thousand per year until February 28, 2029 , and will then reset to the greater of the existing ground rent or market. We incurred ground rent expense of $733 thousand during 2018 , 2017 and 2016 , respectively. 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, 2018 : Year ending December 31: (In thousands) 2019 $ 733 2020 733 2021 733 2022 733 2023 733 Thereafter 46,178 Total future minimum lease payments $ 49,843

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	12 Months Ended
	Dec. 31, 2018
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 2018 , 2017 and 2016 , 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 unconsolidated Funds, 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 9 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 twenty-eight buildings in our Consolidated Portfolio, and four buildings owned by our unconsolidated Funds 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, 2018 , the obligations to remove the asbestos from these properties if they were demolished or undergo major renovations have indeterminable settlement dates, and we are unable to reasonably estimate the fair value of the associated conditional asset retirement obligation. As of December 31, 2018 , the obligations to remove the asbestos from properties that are currently undergoing major renovations, or that we plan to renovate in the future, are not material to our financial statements. Development and Other Contracts During 2016, we commenced building an additional 491 new apartments at our Moanalua Hillside Apartments in Honolulu, Hawaii. We also invested additional capital to upgrade the existing buildings, improve the parking and landscaping, built a new leasing and management office, and constructed a new fitness facility and two pools. In West Los Angeles, we are building a high-rise apartment building with 376 apartments. As of December 31, 2018 , we had an aggregate remaining contractual commitment for these development projects of approximately $202.9 million . As of December 31, 2018 , we had an aggregate remaining contractual commitment for repositionings, capital expenditure projects and tenant improvements of approximately $55.3 million . Guarantees We have made certain environmental and other limited indemnities and guarantees covering customary non-recourse carve- outs for our unconsolidated Funds' debt. We have also guaranteed the related swaps. Our Funds have agreed to indemnify us for any amounts that we would be required to pay under these agreements. As of December 31, 2018 , 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 Funds' debt as of December 31, 2018 . The amounts represent 100% (not our pro-rata share) of the amounts related to our Funds: Fund (1) Loan Maturity Date Principal Balance (In millions) Variable Interest Rate Swap Fixed Interest Rate Swap Maturity Date Partnership X (2)(4) 3/1/2023 $ 110.0 LIBOR + 1.40% 2.30% 3/1/2021 Fund X (3)(4) 7/1/2024 400.0 LIBOR + 1.65% 3.44% 7/1/2022 $ 510.0 ___________________________________________________ (1) See Note 5 for more information regarding our unconsolidated Funds. (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, 2018 , assuming a zero -percent LIBOR interest rate during the remaining life of the swap, the maximum future payments under the swap agreement were $2.2 million . (3) Floating rate term loan, swapped to fixed, which is secured by six properties and requires monthly payments of interest only, with the outstanding principal due upon maturity. As of December 31, 2018 , assuming a zero -percent LIBOR interest rate during the remaining life of the swap, the maximum future payments under the swap agreement were $25.4 million . Loan agreement includes the requirement to purchase an interest rate cap if one month LIBOR equals or exceeds 3.56% for fourteen consecutive days after the related swap matures. (4) Loan agreement includes a zero -percent LIBOR floor. The corresponding swaps do not include such a floor.

Quarterly Financial Information

Quarterly Financial Information (unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information (unaudited)	Quarterly Financial Information (unaudited) The tables below present selected quarterly information for 2018 and 2017 : 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 Three Months Ended (In thousands, except per share amounts) March 31, June 30, 2017 September 30, 2017 December 31, 2017 Total revenue $ 194,481 $ 199,632 $ 208,749 $ 209,190 Net income before noncontrolling interests $ 21,780 $ 22,153 $ 28,508 $ 31,986 Net income attributable to common stockholders $ 19,049 $ 20,244 $ 25,614 $ 29,536 Net income per common share - basic $ 0.12 $ 0.13 $ 0.15 $ 0.17 Net income per common share - diluted $ 0.12 $ 0.13 $ 0.15 $ 0.17 Weighted average shares of common stock outstanding - basic 152,490 155,898 165,471 169,521 Weighted average shares of common stock and common stock equivalents outstanding - diluted 153,655 155,952 165,520 169,562

Schedule III - Consolidated Rea

Schedule III - Consolidated Real Estate and Accumulated Depreciation and Amortization	12 Months Ended
	Dec. 31, 2018
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) Land Building & Improve-ments (2) Total (3) Accumulated Depreciation & Amortization Year Built / Renovated Year Acquired Office Properties 100 Wilshire $ — $ 12,769 $ 78,447 $ 145,881 $ 27,108 $ 209,989 $ 237,097 $ 67,476 1968/2002 1999 233 Wilshire 62,962 9,263 130,426 2,572 9,263 132,998 142,261 9,677 1975/2008-2009 2016 401 Wilshire — 9,989 29,187 121,993 21,787 139,382 161,169 44,421 1981/2000 1996 429 Santa Monica 33,691 4,949 72,534 2,900 4,949 75,434 80,383 4,309 1982/2016 2017 1299 Ocean 124,699 22,748 265,198 8,311 22,748 273,509 296,257 13,325 1980/2006 2017 1901 Avenue of the Stars — 18,514 131,752 112,641 26,163 236,744 262,907 79,484 1968/2001 2001 8484 Wilshire (1) 16,132 8,846 77,780 16,070 8,846 93,850 102,696 17,804 1972/2013 2013 9401 Wilshire 31,582 6,740 152,310 1,071 6,740 153,381 160,121 5,281 1971 2017 9601 Wilshire 145,845 16,597 54,774 107,741 17,658 161,454 179,112 56,579 1962/2004 2001 9665 Wilshire 77,445 5,568 177,072 12,946 5,568 190,018 195,586 7,489 1971 2017 10880 Wilshire 198,794 29,995 437,514 9,072 29,988 446,593 476,581 38,643 1970/2009 2016 10960 Wilshire 201,893 45,844 429,769 20,484 45,852 450,245 496,097 38,549 1971/2006 2016 11777 San Vicente — 5,032 15,768 29,640 6,714 43,726 50,440 14,937 1974/1998 1999 12100 Wilshire 101,203 20,164 208,755 6,040 20,164 214,795 234,959 18,348 1985 2016 12400 Wilshire — 5,013 34,283 76,716 8,828 107,184 116,012 36,034 1985 1996 16501 Ventura 39,803 6,759 53,112 10,937 6,759 64,049 70,808 13,314 1986/2012 2013 Beverly Hills Medical Center — 4,955 27,766 28,476 6,435 54,762 61,197 18,559 1964/2004 2004 Bishop Place — 8,317 105,651 58,572 8,833 163,707 172,540 57,295 1992 2004 Bishop Square 180,000 16,273 213,793 25,831 16,273 239,624 255,897 62,676 1972/1983 2010 Brentwood Court — 2,564 8,872 506 2,563 9,379 11,942 3,332 1984 2006 Brentwood Executive Plaza 39,169 3,255 9,654 32,249 5,921 39,237 45,158 13,349 1983/1996 1995 Brentwood Medical Plaza 35,905 5,934 27,836 1,427 5,933 29,264 35,197 10,572 1975 2006 Brentwood San Vicente Medical — 5,557 16,457 1,039 5,557 17,496 23,053 6,266 1957/1985 2006 Brentwood/Saltair — 4,468 11,615 11,625 4,775 22,933 27,708 8,131 1986 2000 Bundy/Olympic 34,273 4,201 11,860 29,416 6,030 39,447 45,477 13,909 1991/1998 1994 Camden Medical Arts 38,021 3,102 12,221 27,789 5,298 37,814 43,112 13,057 1972/1992 1995 Carthay Campus 48,007 6,595 70,454 5,036 6,594 75,491 82,085 12,275 1965/2008 2014 Century Park Plaza 128,311 10,275 70,761 123,949 16,153 188,832 204,985 56,516 1972/1987 1999 Century Park West (1) 5,618 3,717 29,099 1,033 3,667 30,182 33,849 11,273 1971 2007 Columbus Center 14,362 2,096 10,396 9,758 2,333 19,917 22,250 7,041 1987 2001 Coral Plaza 25,831 4,028 15,019 18,426 5,366 32,107 37,473 11,236 1981 1998 Cornerstone Plaza (1) 10,630 8,245 80,633 6,231 8,263 86,846 95,109 26,906 1986 2007 Encino Gateway — 8,475 48,525 55,755 15,653 97,102 112,755 33,083 1974/1998 2000 Encino Plaza — 5,293 23,125 48,919 6,165 71,172 77,337 25,121 1971/1992 2000 Encino Terrace 91,133 12,535 59,554 96,475 15,533 153,031 168,564 51,989 1986 1999 Executive Tower (1) 15,098 6,660 32,045 60,003 9,471 89,237 98,708 32,313 1989 1995 First Financial Plaza 54,084 12,092 81,104 3,655 12,092 84,759 96,851 10,691 1986 2015 Gateway Los Angeles 46,785 2,376 15,302 48,207 5,119 60,766 65,885 21,250 1987 1994 Harbor Court 30,992 51 41,001 47,131 12,060 76,123 88,183 22,257 1994 2004 Honolulu Club — 1,863 16,766 5,766 1,863 22,532 24,395 8,147 1980 2008 Landmark II — 6,086 109,259 66,476 13,070 168,751 181,821 56,261 1989 1997 Lincoln/Wilshire 38,021 3,833 12,484 23,012 7,475 31,854 39,329 10,872 1996 2000 MB Plaza 32,090 4,533 22,024 32,047 7,503 51,101 58,604 16,949 1971/1996 1998 Olympic Center 41,313 5,473 22,850 32,894 8,247 52,970 61,217 17,828 1985/1996 1997 One Westwood (1) 15,994 10,350 29,784 62,621 9,194 93,561 102,755 31,359 1987/2004 1999 Palisades Promenade — 5,253 15,547 54,537 9,664 65,673 75,337 21,362 1990 1995 Initial Cost Cost Capitalized Subsequent to Acquisition Gross Carrying Amount Property Name Encumb-rances Land Building & Improve-ments (2) Improve-ments (2) Land Building & Improve-ments (2) Total (3) Accumulated Depreciation & Amortization Year Built / Renovated Year Acquired Office Properties (continued) Saltair/San Vicente 21,269 5,075 6,946 16,813 7,557 21,277 28,834 7,643 1964/1992 1997 San Vicente Plaza — 7,055 12,035 51 7,055 12,086 19,141 4,621 1985 2006 Santa Monica Square (1) 9,169 5,366 18,025 21,310 6,863 37,838 44,701 13,611 1983/2004 2001 Second Street Plaza 49,505 4,377 15,277 35,680 7,421 47,913 55,334 16,450 1991 1997 Sherman Oaks Galleria 300,000 33,213 17,820 402,194 48,328 404,899 453,227 139,046 1981/2002 1997 Studio Plaza — 9,347 73,358 139,850 15,015 207,540 222,555 79,664 1988/2004 1995 The Tower 65,969 9,643 160,602 3,146 9,643 163,748 173,391 15,289 1988/1998 2016 The Trillium (1) 26,472 20,688 143,263 87,532 21,989 229,494 251,483 75,904 1988 2005 Valley Executive Tower 92,618 8,446 67,672 103,059 11,737 167,440 179,177 56,133 1984 1998 Valley Office Plaza 41,271 5,731 24,329 47,813 8,957 68,916 77,873 24,998 1966/2002 1998 Verona — 2,574 7,111 14,729 5,111 19,303 24,414 6,686 1991 1997 Village on Canon 58,337 5,933 11,389 49,556 13,303 53,575 66,878 17,903 1989/1995 1994 Warner Center Towers 335,000 43,110 292,147 417,365 59,419 693,203 752,622 233,979 1982-1993/2004 2002 Westside Towers 107,386 8,506 79,532 80,586 14,568 154,056 168,624 51,893 1985 1998 Westwood Center 113,344 9,512 259,341 9,508 9,513 268,848 278,361 24,383 1965/2000 2016 Westwood Place 65,669 8,542 44,419 51,718 11,448 93,231 104,679 31,580 1987 1999 Multifamily Properties 555 Barrington 50,000 6,461 27,639 40,247 14,903 59,444 74,347 20,360 1989 1999 Barrington Plaza 210,000 28,568 81,485 153,090 58,208 204,935 263,143 69,633 1963/1998 1998 Barrington/Kiowa 11,345 5,720 10,052 580 5,720 10,632 16,352 3,656 1974 2006 Barry 9,000 6,426 8,179 460 6,426 8,639 15,065 3,086 1973 2006 Kiowa 4,535 2,605 3,263 372 2,605 3,635 6,240 1,274 1972 2006 Moanalua Hillside Apartments 145,000 22,252 157,353 40,280 32,826 186,987 219,813 41,344 1968/2004/2018 2005 Pacific Plaza 78,000 10,091 16,159 73,520 27,816 71,954 99,770 23,839 1963/1998 1999 The Shores 212,000 20,809 74,191 198,955 60,555 233,400 293,955 76,519 1965-67/2002 1999 Villas at Royal Kunia 90,120 42,887 71,376 14,463 35,163 93,563 128,726 36,210 1990/1995 2006 Waena Apartments 102,400 26,864 119,272 1,006 26,864 120,279 147,143 13,638 1970/2009-2014 2014 Ground Lease Owensmouth/Warner (1) 5,887 23,848 — — 23,848 — 23,848 — N/A 2006 Total Operating Properties $ 4,163,982 $ 790,894 $ 5,402,373 $ 3,707,759 $ 1,065,099 $ 8,835,856 $ 9,900,955 $ 2,246,887 Property Under Development Landmark II Development $ — $ 13,070 $ — $ 34,766 $ 13,070 $ 34,766 $ 47,836 $ — N/A N/A Moanalua Hillside Apartments - Development — 2,468 — 76,045 2,468 78,871 81,339 — N/A N/A Other Developments — — — 578 — 578 578 — N/A N/A Total Property Under Development $ — $ 15,538 $ — $ 111,389 $ 15,538 $ 114,215 $ 129,753 $ — Total $ 4,163,982 $ 806,432 $ 5,402,373 $ 3,819,148 $ 1,080,637 $ 8,950,071 $ 10,030,708 $ 2,246,887 _____________________________________________________ (1) These properties are encumbered by our revolving credit facility, which had a $105.0 million balance as of December 31, 2018 . (2) Includes tenant improvements and lease intangibles. (3) At December 31, 2018 , the aggregate federal income tax cost basis for consolidated real estate was $6.90 billion (unaudited). The table below presents a reconciliation of our investment in real estate: Year Ended December 31, 2018 2017 2016 Investment in real estate, gross Beginning balance $ 9,829,208 $ 8,998,120 $ 7,266,009 Property acquisitions — 707,120 1,750,828 Improvements 271,948 111,642 96,649 Developments 5,281 66,013 31,559 Properties held for sale — — (186 ) Removal of fully depreciated and amortized tenant improvements and lease intangibles (75,729 ) (53,687 ) (146,739 ) Ending balance $ 10,030,708 $ 9,829,208 $ 8,998,120 Accumulated depreciation and amortization Beginning balance $ (2,012,752 ) $ (1,789,678 ) $ (1,687,998 ) Depreciation and amortization (309,864 ) (276,761 ) (248,914 ) Properties held for sale — — 495 Removal of fully depreciated and amortized tenant improvements and lease intangibles 75,729 53,687 146,739 Ending balance $ (2,246,887 ) $ (2,012,752 ) $ (1,789,678 ) Investment in real estate, net $ 7,783,821 $ 7,816,456 $ 7,208,442

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with 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	Investment in Real Estate Acquisitions 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, which includes the capitalized transaction costs, 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, based upon our estimates of expected future cash flows and other valuation techniques. Our estimates are based upon expected future cash flows and other valuation techniques. 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. 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, 2018 and 2017 , we did not have any properties held for sale. Dispositions Recognition of gains or losses from sales of investments in real estate requires that we meet certain revenue recognition criteria and transfer control of the real estate to the buyer. The gain or loss recorded is measured as the difference between the sales price, less costs to sell, and the carrying value of the real estate when we sell it. See Note 3 for our property disposition disclosures. Cost capitalization Costs incurred during the period of construction of real estate are capitalized. Cost capitalization of development and redevelopment activities begins during the predevelopment period, which we define as the activities that are necessary to begin the development of the property. We cease capitalization upon substantial completion of the project, but no later than one year from cessation of major construction activity. We also cease capitalization when activities necessary to prepare the property for its intended use have been suspended. Capitalized costs are included in 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.
Investment in Unconsolidated Real Estate Funds	Investment in Unconsolidated Real Estate Funds We manage and hold equity interests in three Funds: Fund X, Partnership X and the Opportunity Fund. As of December 31, 2018 , we held direct and indirect equity interests of 71.3% of Fund X, 24.5% of Partnership X and 6.2% of the Opportunity Fund. We account for our investments in the Funds using the equity method because we have significant influence but not control over the Funds, and our Funds do not qualify as VIEs. Our investment balance includes our share of the net assets of the combined Funds, acquisition basis difference, additional basis for capital raising costs, our share of our Funds' accumulated other comprehensive income (loss) related to our Funds' derivatives, and notes receivable from our Funds.
Impairment of Long-Lived Assets	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.
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.
Revenue Recognition	Revenue Recognition 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 $18.8 million , $12.9 million and $13.6 million during 2018 , 2017 and 2016 , 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 $1.6 million , $2.1 million and $2.4 million during 2018 , 2017 and 2016 , 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 leasehold improvements of $3.5 million , $2.6 million and $2.6 million during 2018 , 2017 and 2016 , 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. 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 in the first quarter of 2018 on a prospective basis. See "Adopted ASUs" further below. The 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 $102.5 million , $96.2 million and $88.8 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. Office parking receivables were $1.1 million and $1.0 million as of December 31, 2018 and 2017 , respectively, and are included in Tenant receivables in our consolidated balance sheets.
Allowances for Tenant Receivables and Deferred Rent Receivables	Allowances for Tenant Receivables and Deferred Rent Receivables We present 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 consider 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.
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 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.
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. 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.
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, on a straight-line basis 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 and cap 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. In limited instances, we also make use of interest rate caps to limit our exposure to interest rate increases on our floating-rate debt. We do not speculate in derivatives and we do not make use of any other derivative instruments. We adopted ASU No. 2017-12 on a prospective basis in the first quarter of 2018 - see "Adopted ASUs" further below. 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, including depreciation, from unconsolidated real estate funds, as interest payments are made by our Funds on their hedged floating rate debt. Changes in fair value of hedging instruments not designated as cash flow hedges are recorded as interest expense. 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 real estate funds on our consolidated balance sheet.
Stock-Based Compensation	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
EPS	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.
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 business segments: the acquisition, development, ownership and management of office real estate, and the acquisition, development, ownership and management of multifamily real estate. The services for our office segment include primarily rental of office space and other tenant services, including parking and storage space rental. The services for our multifamily segment include primarily rental of apartments and other tenant services, including parking and storage space rental.
Income Taxes	Income Taxes We have elected to be taxed as a REIT under the Code, commencing with our initial taxable year ended December 31, 2006. To qualify as a REIT, we are required (among other things) to distribute at least 90% of our REIT taxable income to our stockholders and meet various other requirements imposed by the Code relating to matters such as operating results, asset holdings, distribution levels and diversity of stock ownership. Provided that we qualify for taxation as a REIT, we are generally not subject to corporate-level income tax on the earnings distributed currently to our stockholders that we derive from our REIT qualifying activities. If we fail to qualify as a REIT in any taxable year, and are unable to avail ourselves of certain savings provisions set forth in the Code, all of our taxable income would be subject to federal income tax at regular corporate rates, 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 2018 , 2017 or 2016 . 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 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 2018 that we expect to be applicable and have a material impact on our financial statements. Adopted ASUs During 2018 we adopted the ASUs listed below: Revenue from Contracts with Customers In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers" (Topic 606), which provides guidance for the accounting of revenue from contracts with customers, and supersedes Topic 605, "Revenue Recognition", and most industry-specific guidance throughout the industry topics of the Codification. In March 2016, the FASB issued ASU No. 2016-08, "Principal versus Agent Considerations (Reporting Revenue Gross versus Net)", which amends Topic 606 and clarifies the guidance for principal versus agent considerations. In April 2016, the FASB issued ASU No. 2016-10, "Identifying Performance Obligations and Licensing" which amends Topic 606 and provides guidance for identifying performance obligations and licensing. In May 2016, the FASB issued ASU No. 2016-12, "Narrow-Scope Improvements and Practical Expedients" which amends Topic 606 and provides guidance for a variety of revenue recognition related topics. In February 2017, the FASB issued ASU No. 2017-05 "Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets" (Subtopic 610-20), which provides guidance for recognizing gains and losses from the transfer of nonfinancial assets in contracts with non-customers. Sales of real estate are now accounted for under Subtopic 610-20 which focuses on a transfer of control. The amendments in these ASUs were effective in the first quarter of 2018 and were required to be applied on a retrospective basis. We adopted the ASU in the first quarter of 2018 and it did not have a material impact on our financial statements. Most of our revenues are derived from lease contracts with tenants and are not within the scope of the respective ASUs. Although our office parking revenues are within the scope of the respective ASUs, the timing and pattern of revenue recognition was not impacted. Derivatives and Hedging In August 2017, the FASB issued ASU No. 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities". The ASU requires the entire change in the fair value of the hedging instrument included in the assessment of hedge effectiveness be recorded in other comprehensive income. GAAP historically provided special hedge accounting only for the portion of the hedge deemed to be “highly effective” and requires an entity to separately reflect the amount by which the hedging instrument does not offset the hedged item, which is referred to as the “ineffective” amount. The amendments are effective in the first quarter of 2019 and are required to be applied on a prospective basis. We early adopted the ASU in the first quarter of 2018 and it did not have a material impact on our financial statements. The ASU requires the cumulative effect of initially applying the ASU as an adjustment to AOCI with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year in which the ASU is adopted. On January 1, 2018, we recorded such an adjustment to AOCI and accumulated deficit of $211 thousand . See Note 10 . ASUs Not Yet Adopted Leases In February 2016, the FASB issued ASU No. 2016-02, "Leases" (Topic 842). The primary difference between Topic 842 and current GAAP is the recognition of lease assets and liabilities on the balance sheet by lessees for leases classified as operating leases under current GAAP. The accounting applied by lessors is largely unchanged from current GAAP, for example, the vast majority of operating leases will remain classified as operating leases, and lessors will continue to recognize lease income for those leases on a straight-line basis over the lease term. Topic 842 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 should be accounted for in accordance with Topic 842. 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. Based on our preliminary assessment, we expect that operating leases for which we are the lessor will qualify for the single component presentation, and we therefore expect to elect adoption of this practical expedient. Topic 842 defines initial direct costs of a lease (which we have historically 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 capitalized $7.9 million of leasing costs during the year ended December 31, 2018 that would not qualify as initial direct costs and would be expensed under Topic 842. The expensing of those costs, adjusted for amortization expense, would have reduced net income attributable to common stockholders by $6.0 million for the year ended December 31, 2018 . We pay rent under a ground lease which expires on December 31, 2086 . See Note 16 for more information regarding this ground lease. We currently account for the lease as an operating lease. We expect to recognize a right-of-use asset and lease liability for this ground lease in the first quarter of 2019 when we adopt the ASU. We do not expect the change in accounting for the ground lease to have a material impact on our financial position or results of operations. The treatment of our revenues could be impacted by Topic 842, however, we do not expect any impact to be material to our financial statements. In December 2018, the FASB issued ASU 2018-20, an update to ASC Topic 842, Leases , 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 do not expect the ASU to have a material impact on our financial statements. The ASUs are effective in the first quarter of 2019 and are required to be adopted using either a) a modified retrospective approach which results in a cumulative adjustment to the opening balance of retained earnings (accumulated deficit) on January 1, 2017, and restatement of the amounts presented prior to January 1, 2019 for leases that existed or were entered into after January 1, 2017, the beginning of the earliest comparative period presented in the 2019 consolidated financial statements, or b) a modified retrospective transition method which results in a cumulative adjustment to the opening balance of retained earnings (accumulated deficit) on January 1, 2019 for leases that existed or were entered into prior to January 1, 2019, the effective date of the ASU. All leases entered into on or after January 1, 2019 would be accounted for as prescribed by ASC 842. ASC 842 provides a practical expedient package that allows entities to not (a) reassess whether any expired or existing contracts are considered or contain leases; (b) reassess the lease classification for any expired or existing leases; and (c) reassess initial direct costs for any existing leases. The Company plans to elect the modified retrospective transition method for adoption on January 1, 2019 and expects to elect the use of the practical expedient package described above. We plan to adopt the ASUs in the first quarter of 2019.
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, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Real Estate Properties	As of December 31, 2018 , our portfolio (not including two parcels of land from which we receive rent under ground leases), consisted of the following office and multifamily properties (both of which include ancillary retail space): Consolidated Portfolio Total Portfolio Office Wholly-owned properties 53 53 Consolidated JV properties 10 10 Unconsolidated Fund properties — 8 63 71 Multifamily Wholly-owned properties 10 10 Total 73 81

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Tenant Receivables and Deferred Rent Receivables	The table below presents our allowances and security obtained from our tenants: (In thousands) December 31, 2018 December 31, 2017 Allowance for tenant receivables $ 5,215 $ 3,062 Allowance for deferred rent receivables $ 2,849 $ 3,405 Letters of credit from our tenants $ 27,749 $ 25,212 Cash security deposits from our tenants $ 50,733 $ 50,414 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 2016 Tenant receivables allowance - decrease in net income $ (2,154 ) $ (406 ) $ (422 ) Deferred rent receivables allowance - increase in net income $ 556 $ 1,739 $ 898

Investment in Real Estate (Tabl

Investment in Real Estate (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Schedule of Purchase Price and Source of Funds for Acquisitions	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 10 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 7 for more information. The table below summarizes our purchase accounting and funding sources for the acquisition. The contract and purchase price differ due to prorations and similar matters. (in thousands) Actual at Closing (1) Pro Forma Sell Down Adjustments (2) Pro Forma Building square footage 1,725 1,725 Use of funds: Land $ 94,996 $ 94,996 Buildings and improvements 1,236,786 1,236,786 Tenant improvements and lease intangibles 50,439 50,439 Acquired above- and below-market leases, net (3) (49,708 ) (49,708 ) Net assets and liabilities acquired $ 1,332,513 $ 1,332,513 Source of funds: Cash on hand (4) $ 153,745 $ — $ 153,745 Credit facility (5) 290,000 (240,000 ) 50,000 Non-recourse term loan, net (6) 568,768 — 568,768 Noncontrolling interests 320,000 240,000 560,000 Total source of funds $ 1,332,513 $ — $ 1,332,513 ________________________________________________ (1) Reflects the purchase of the Westwood Portfolio on the Acquisition Date when we contributed sixty -percent of the equity to the consolidated JV. (2) Reflects our sale of thirty -percent of the equity in the JV on the Sell Down Date, presented as of the Acquisition Date, treated as in-substance real estate, which reduced our ownership interest in the JV to thirty -percent. We sold the interest for the $240.0 million we contributed plus an additional $1.1 million to compensate us for the cost of holding the investment. We recognized a gain on the sale of $1.1 million . We used the proceeds from the sale to pay down the balance owed on our revolving credit facility. (3) As of the Acquisition Date, the weighted average remaining life of the acquired above- and below-market leases was approximately 4.4 years . (4) Cash paid included a $75.0 million deposit, $67.5 million paid at closing, and $11.2 million spent on loan costs in connection with securing the $580.0 million term loan. (5) Reflects borrowings using our credit facility, which bears interest at LIBOR + 1.40% . See Note 7 for information regarding our credit facility. (6) Reflects 100% (not our pro rata share) of a $580.0 million interest-only non-recourse loan, net of deferred loan costs of $11.2 million incurred to secure the loan. The loan has a seven -year term and is secured by the Westwood Portfolio. Interest on the loan is floating at LIBOR + 1.40% , which has been effectively fixed at 2.37% per annum for five years through interest rate swaps. See Note 7 for information regarding this loan. The table below summarizes the purchase accounting for the acquisitions. The contract and purchase prices differ due to prorations and similar matters. (in thousands) 12100 Wilshire 233 Wilshire Submarket Brentwood Santa Monica Acquisition date July 21 September 27 Contract price $ 225,000 $ 139,500 Building square footage 365 129 Investment in real estate: Land $ 20,164 $ 9,263 Buildings and improvements 199,698 126,938 Tenant improvements and lease intangibles 9,057 3,488 Acquired above- and below-market leases, net (4,523 ) (1,838 ) Net assets and liabilities acquired $ 224,396 $ 137,851
Schedule of Revenue and Net Income Attributable to Common Stockholders from the Westwood Portfolio	The table below presents the revenues and net income attributable to common stockholders from the Westwood Portfolio included in the consolidated statement of operations from the Acquisition Date: Year Ended December 31, (in thousands) 2018 2017 2016 Total office revenues $ 102,398 $ 96,106 $ 80,464 Net income attributable to common stockholders (1) $ 6,163 $ 6,346 $ 2,998 ______________________________________________________ (1) Excluding transaction costs, net income attributable to common stockholders was $6.2 million , $6.3 million and $5.0 million for the years ended December 31, 2018 , 2017 and 2016 , respectively.
Schedule of Pro Forma Information	The table below presents the historical results of Douglas Emmett, Inc. and the Westwood Portfolio on a combined basis as if the acquisition was completed on January 1, 2016, based on our thirty -percent ownership interest and includes adjustments that give effect to events that are (i) directly attributable to the acquisition, (ii) expected to have a continuing impact on us, and (iii) are factually supportable. The pro forma reflects the hypothetical impact of the acquisition on us and does not purport to represent what our results of operations would have been had the acquisition occurred on January 1, 2016, or project the results of operations for any future period. The information does not reflect cost savings or operating synergies that may result from the acquisition or the costs to achieve any such potential cost savings or operating synergies. Transaction costs related to the acquisition have been excluded. Year Ended December 31, (in thousands, except per share information) 2016 Pro forma revenues $ 755,878 Pro forma net income attributable to common stockholders $ 84,319 Pro forma net income attributable to common stockholders per share – basic $ 0.56 Pro forma net income attributable to common stockholders per share – diluted $ 0.55

Acquired Lease Intangibles (Tab

Acquired Lease Intangibles (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Acquired Lease Intangibles	Summary of our Acquired Lease Intangibles (In thousands) December 31, 2018 December 31, 2017 Above-market tenant leases $ 5,595 $ 7,177 Above-market tenant leases - accumulated amortization (3,289 ) (3,846 ) Above-market ground lease where we are the lessor 1,152 1,152 Above-market ground lease - accumulated amortization (207 ) (190 ) Acquired lease intangible assets, net $ 3,251 $ 4,293 Below-market tenant leases $ 112,175 $ 127,606 Below-market tenant leases - accumulated accretion (63,013 ) (55,428 ) Above-market ground lease where we are the tenant 4,017 4,017 Above-market ground lease - accumulated accretion (610 ) (560 ) Acquired lease intangible liabilities, net $ 52,569 $ 75,635
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) 2018 2017 2016 Net accretion of above- and below-market tenant lease assets and liabilities (1) $ 21,992 $ 17,973 $ 18,165 Amortization of an above-market ground lease (2) (17 ) (17 ) (17 ) Accretion of an above-market ground lease liability (3) 50 50 50 Total $ 22,025 $ 18,006 $ 18,198 _______________________________________________________________________________________ (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.
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, 2018 . The above-market ground lease liability presented in the tables above will be offset against a right of use ground lease asset on January 1, 2019 when we adopt ASU No. 2016-02 - see Note 2, and there is therefore no future accretion for that lease reflected in the table below. Year ending December 31: Net increase to revenues (In thousands) 2019 $ 15,521 2020 12,516 2021 6,813 2022 4,157 2023 2,542 Thereafter 4,362 Total $ 45,911

Investments in Unconsolidated_2

Investments in Unconsolidated Real Estate Funds (Tables)	12 Months Ended
	Dec. 31, 2018
Real Estate Investments, Net [Abstract]
Summary of Statement of Operations for Investments in Unconsolidated Real Estate Funds and Cash Received from Funds	The table below presents cash distributions received from our Funds: Year Ended December 31, (In thousands) 2018 2017 2016 Operating distributions received $ 6,400 $ 5,905 $ 2,668 Capital distributions received 7,349 43,560 24,170 Total distributions received $ 13,749 $ 49,465 $ 26,838 The tables below present selected financial information for the Funds on a combined basis. 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, 2018 December 31, 2017 Total assets $ 694,713 $ 704,186 Total liabilities $ 525,483 $ 523,767 Total equity $ 169,230 $ 180,419 Year Ended December 31, (In thousands) 2018 2017 2016 Total revenues $ 79,590 $ 75,896 $ 73,171 Operating income $ 22,959 $ 20,640 $ 19,477 Net income $ 6,260 $ 5,085 $ 8,213

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Other Assets [Abstract]
Schedule of Other Assets	(In thousands) December 31, 2018 December 31, 2017 Restricted cash $ 121 $ 121 Prepaid expenses 7,830 9,235 Other indefinite-lived intangibles 1,988 1,988 Furniture, fixtures and equipment, net 1,101 1,155 Other 3,719 5,943 Total other assets $ 14,759 $ 18,442

Secured Notes Payable and Rev_2

Secured Notes Payable and Revolving Credit Facility, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Secured Notes Payable and Revolving Credit Facility	Description Maturity Date (1) Principal Balance as of December 31, 2018 Principal Balance as of December 31, 2017 Variable Interest Rate Fixed Interest Rate (2) Swap Maturity Date (In thousands) Wholly Owned Subsidiaries Term loan (3) — $ — $ 146,974 — — — Term loan (3) — — 280,721 — — — Fannie Mae loan 10/1/2019 145,000 145,000 LIBOR + 1.25% N/A N/A Term loan (4) 4/15/2022 340,000 340,000 LIBOR + 1.40% 2.77% 4/1/2020 Term loan (4) 7/27/2022 180,000 180,000 LIBOR + 1.45% 3.06% 7/1/2020 Term loan (4) 11/1/2022 400,000 400,000 LIBOR + 1.35% 2.64% 11/1/2020 Term loan (4) 6/23/2023 360,000 360,000 LIBOR + 1.55% 2.57% 7/1/2021 Term loan (4) 12/23/2023 220,000 220,000 LIBOR + 1.70% 3.62% 12/23/2021 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 — LIBOR + 1.30% 3.84% 3/1/2023 Fannie Mae loan (4) 4/1/2025 102,400 102,400 LIBOR + 1.25% 2.84% 3/1/2020 Fannie Mae loan (4) 12/1/2025 115,000 115,000 LIBOR + 1.25% 2.76% 12/1/2020 Fannie Mae loan (4) 6/1/2027 550,000 550,000 LIBOR + 1.37% 3.16% 6/1/2022 Term loan (5) 6/1/2038 31,582 32,213 N/A 4.55% N/A Revolving credit facility (6) 8/21/2020 105,000 — LIBOR + 1.40% N/A N/A Total Wholly Owned Subsidiary Debt 3,183,982 3,172,308 Consolidated JVs Term loan (4) 2/28/2023 580,000 580,000 LIBOR + 1.40% 2.37% 3/1/2021 Term loan (4) 12/19/2024 400,000 400,000 LIBOR + 1.30% 3.47% 1/1/2023 Total Consolidated Debt (7) 4,163,982 4,152,308 Unamortized loan premium, net 3,986 4,191 Unamortized deferred loan costs, net (33,938 ) (39,109 ) Total Consolidated Debt, net $ 4,134,030 $ 4,117,390 _____________________________________________________ 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. (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 9 for details of our interest rate swaps. See below for details of our loan costs. (3) At December 31, 2018 , 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) Requires monthly payments of principal and interest. Principal amortization is based upon a 30 -year amortization schedule. (6) $400.0 million revolving credit facility. Unused commitment fees range from 0.15% to 0.20% . (7) See Note 13 for our fair value disclosures. Debt Statistics The following table summarizes our fixed and floating rate debt: (In thousands) Principal Balance as of December 31, 2018 Principal Balance as of December 31, 2017 Aggregate swapped to fixed rate loans $ 3,882,400 $ 3,547,400 Aggregate fixed rate loans 31,582 459,908 Aggregate floating rate loans 250,000 145,000 Total Debt $ 4,163,982 $ 4,152,308 The following table summarizes certain debt statistics: Statistics for consolidated loans with interest fixed under the terms of the loan or a swap Principal balance (in billions) $3.91 Weighted average remaining life (including extension options) 5.4 years Weighted average remaining fixed interest period 2.6 years Weighted average annual interest rate 3.07%
Schedule of Minimum Future Principal Payments	At December 31, 2018 , the minimum future principal payments due on our 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) 2019 $ 145,718 $ 145,718 2020 400,752 105,752 2021 787 787 2022 1,040,823 920,823 2023 1,495,862 1,160,862 Thereafter 1,080,040 1,830,040 Total future principal payments $ 4,163,982 $ 4,163,982 ____________________________________________ (1) Our loan agreements generally 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) 2018 2017 2016 Loan costs expensed $ 418 $ 2,359 $ 1,441 Deferred loan cost amortization 7,874 9,033 7,608 Total $ 8,292 $ 11,392 $ 9,049

Interest Payable, Accounts Pa_2

Interest Payable, Accounts Payable and Deferred Revenue (Tables)	12 Months Ended
	Dec. 31, 2018
Accounts Payable and Accrued Liabilities [Abstract]
Schedule of Interest Payable, Accounts Payable and Deferred Revenue	(In thousands) December 31, 2018 December 31, 2017 Interest payable $ 10,657 $ 9,829 Accounts payable and accrued liabilities 75,111 62,741 Deferred revenue 44,386 31,377 Total interest payable, accounts payable and deferred revenue $ 130,154 $ 103,947

Derivative Contracts (Tables)

Derivative Contracts (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Swap Derivatives	As of December 31, 2018 , all of our interest rate swaps, which include the interest rate swaps of our consolidated JVs and our unconsolidated Funds, were designated as cash flow hedges: Number of Interest Rate Swaps Notional (In thousands) Consolidated derivatives (1)(3) 27 $ 3,882,400 Unconsolidated Funds' derivatives (2)(3) 4 $ 510,000 ___________________________________________________ (1) The notional amount reflects 100% , not our pro-rata share, of our consolidated JVs' derivatives. (2) The notional amount reflects 100% , not our pro-rata share, of our unconsolidated Funds' derivatives. (3) See Note 13 for our derivative fair value disclosures.
Schedule of Derivative Liabilities at Fair Value	(In thousands) December 31, 2018 December 31, 2017 Consolidated derivatives (1) $ 1,681 $ 915 Unconsolidated Funds' derivatives (2) $ — $ — ___________________________________________________ (1) Includes 100% , not our pro-rata share, of our consolidated JVs' derivatives. (2) Our unconsolidate d Funds' 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 , were as follows: (In thousands) December 31, 2018 December 31, 2017 Consolidated derivatives (1) $ 76,021 $ 60,093 Unconsolidated Funds' derivatives (2) $ 12,576 $ 9,350 ___________________________________________________ (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 Funds' derivatives.
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, 2018 2017 2016 Derivatives Designated as Cash Flow Hedges: Consolidated derivatives: Gain recorded in AOCI - adoption of ASU 2017-12 (1)(2) $ 211 $ — $ — Gain recorded in AOCI before reclassifications (1)(2) $ 22,723 $ 16,512 $ 14,192 (Gain) loss reclassified from AOCI to Interest Expense (1) $ (10,103 ) $ 13,976 $ 25,917 Interest Expense presented in the consolidated statements of operations $ (133,402 ) $ (145,176 ) $ (146,148 ) (Gain) loss related to ineffectiveness recorded in Interest Expense $ — $ 51 $ (196 ) Unconsolidated Funds' derivatives (our share) (3) : Gain recorded in AOCI before reclassifications (1) $ 3,052 $ 3,275 $ 8 (Gain) loss reclassified from AOCI to Income, including depreciation, from unconsolidated real estate funds (1) $ (813 ) $ 527 $ 357 Income, including depreciation, from unconsolidated real estate funds presented in the consolidated statements of operations $ 6,400 $ 5,905 $ 7,812 __________________________________________________ (1) See Note 10 for our AOCI reconciliation. (2) See Note 2 regarding the ASU adoption. (3) 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, 2018 , 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: Gains to be reclassified from AOCI to Interest Expense $ 36,161 Unconsolidated Funds' derivatives (our share): Gains to be reclassified from AOCI to Income, including depreciation, from unconsolidated real estate funds $ 2,565

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2018
Stockholders' Equity Attributable to Parent [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) 2018 2017 2016 Net income attributable to common stockholders $ 116,086 $ 94,443 $ 85,397 Transfers from noncontrolling interests: Exchange of OP Units with noncontrolling interests 10,292 14,242 23,060 Repurchase of OP Units from noncontrolling interests (59 ) (6,764 ) (498 ) Net transfers from noncontrolling interests 10,233 7,478 22,562 Change from net income attributable to common stockholders and transfers from noncontrolling interests $ 126,319 $ 101,921 $ 107,959
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) 2018 2017 2016 Beginning balance $ 43,099 $ 15,156 $ (9,285 ) Adoption of ASU 2017-12 - cumulative opening balance adjustment (2) 211 — — Consolidated derivatives: Other comprehensive income before reclassifications 22,723 16,512 14,192 Reclassification of (gains) losses from AOCI to Interest Expense (10,103 ) 13,976 25,917 Unconsolidated Funds' derivatives (our share): Other comprehensive income before reclassifications 3,052 3,275 8 Reclassification of (gains) losses from AOCI to Income, including depreciation, from unconsolidated real estate funds (813 ) 527 357 Net current period OCI 15,070 34,290 40,474 OCI attributable to noncontrolling interests (4,225 ) (6,347 ) (16,033 ) OCI attributable to common stockholders 10,845 27,943 24,441 Ending balance $ 53,944 $ 43,099 $ 15,156 __________________________________________________ (1) See Note 9 for the details of our derivatives and Note 13 for our derivative fair value disclosures. (2) See Note 2 regarding our adoption of the ASU on January 1, 2018.
Common Stock Dividends Classification for United States Federal Income Tax Purposes	Our common stock dividends paid during 2018 are classified for federal income tax purposes as follows: Record Date Paid Date Dividend Per Share Ordinary Income Percentage Capital Gain Percentage Return of Capital Percentage Amount Qualifying as a Section 199A Dividend 12/29/2017 1/15/2018 $ 0.25 32.5 % — % 67.5 % 32.5 % 3/29/2018 4/17/2018 0.25 32.5 % — % 67.5 % 32.5 % 6/29/2018 7/13/2018 0.25 32.5 % — % 67.5 % 32.5 % 9/28/2018 10/16/2018 0.25 32.5 % — % 67.5 % 32.5 % Total / Weighted Average $ 1.00 32.5 % — % 67.5 % 32.5 %

EPS (Tables)

EPS (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 2017 2016 Numerator (In thousands): Net income attributable to common stockholders $ 116,086 $ 94,443 $ 85,397 Allocation to participating securities: Unvested LTIP Units (546 ) (626 ) (468 ) Numerator for basic and diluted net income attributable to common stockholders $ 115,540 $ 93,817 $ 84,929 Denominator (In thousands): Weighted average shares of common stock outstanding - basic 169,893 160,905 149,299 Effect of dilutive securities: Stock options (1) 9 325 3,891 Weighted average shares of common stock and common stock equivalents outstanding - diluted 169,902 161,230 153,190 Basic EPS: Net income attributable to common stockholders per share $ 0.68 $ 0.58 $ 0.57 Diluted EPS: Net income attributable to common stockholders per share $ 0.68 $ 0.58 $ 0.55 ____________________________________________________ (1) The following securities were excluded from the calculation of diluted EPS because including them would be anti-dilutive to the calculation: Year Ended December 31, (In thousands) 2018 2017 2016 OP Units 26,661 24,810 25,110 Vested LTIP Units 813 274 578

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock-Based Award Activity	The table below presents our outstanding stock options activity: 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, 2015 11,535 $ 18.04 23 $ 151,569 Exercised (7,566 ) $ 20.98 $ 104,108 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 —
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, 2015 1,096 $ 19.85 Granted 739 $ 27.62 $ 20,420 Vested (778 ) $ 22.23 $ 17,293 Forfeited (17 ) $ 27.77 $ 473 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

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of Estimated Fair Value of Secured Notes Payable	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, 2018 December 31, 2017 Fair value $ 4,087,979 $ 4,195,489 Carrying value $ 4,062,968 $ 4,156,499
Schedule of Financial Instruments Measured at Fair Value	The table below presents the estimated fair value of our derivatives: (In thousands) December 31, 2018 December 31, 2017 Derivative Assets: Fair value - c onsolidated derivatives (1) $ 73,414 $ 60,069 Fair value - unconsolidated Funds' derivatives (2) $ 12,228 $ 9,437 Derivative Liabilities: Fair value - c onsolidated derivatives (1) $ 1,530 $ 807 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 sheet. (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 real estate funds in our consolidated balance sheets. See Note 17 regarding our unconsolidated Funds debt and derivatives.

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2018 2017 2016 Office Segment Total office revenues $ 777,931 $ 715,546 $ 645,633 Office expenses (252,751 ) (233,633 ) (214,546 ) Office segment profit 525,180 481,913 431,087 Multifamily Segment Total multifamily revenues 103,385 96,506 96,918 Multifamily expenses (28,116 ) (24,401 ) (23,317 ) Multifamily segment profit 75,269 72,105 73,601 Total profit from all segments $ 600,449 $ 554,018 $ 504,688
Reconciliation of Segment Profit to Net 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, 2018 2017 2016 Total profit from all segments $ 600,449 $ 554,018 $ 504,688 General and administrative (38,641 ) (36,234 ) (34,957 ) Depreciation and amortization (309,864 ) (276,761 ) (248,914 ) Other income 11,414 9,712 8,759 Other expenses (7,472 ) (7,037 ) (9,477 ) Income, including depreciation, from unconsolidated real estate funds 6,400 5,905 7,812 Interest expense (133,402 ) (145,176 ) (146,148 ) Demolition expenses (272 ) — — Income before gains 128,612 104,427 81,763 Gains on sales of investments in real estate — — 14,327 Net income 128,612 104,427 96,090 Less: Net income attributable to noncontrolling interests (12,526 ) (9,984 ) (10,693 ) Net income attributable to common stockholders $ 116,086 $ 94,443 $ 85,397

Future Minimum Lease Rental R_2

Future Minimum Lease Rental Receipts (Tables)	12 Months Ended
	Dec. 31, 2018
Operating Leases, Future Minimum Payments Receivable [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, 2018 : Year Ending December 31, (In thousands) 2019 $ 578,162 2020 531,875 2021 437,528 2022 353,395 2023 269,535 Thereafter 656,926 Total future minimum base rentals (1) $ 2,827,421 _____________________________________________________ (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.

Future Minimum Lease Payments (

Future Minimum Lease Payments (Tables)	12 Months Ended
	Dec. 31, 2018
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [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, 2018 : Year ending December 31: (In thousands) 2019 $ 733 2020 733 2021 733 2022 733 2023 733 Thereafter 46,178 Total future minimum lease payments $ 49,843

Commitments, Contingencies an_2

Commitments, Contingencies and Guarantees (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Debt Related to Unconsolidated Funds	The table below summarizes our Funds' debt as of December 31, 2018 . The amounts represent 100% (not our pro-rata share) of the amounts related to our Funds: Fund (1) Loan Maturity Date Principal Balance (In millions) Variable Interest Rate Swap Fixed Interest Rate Swap Maturity Date Partnership X (2)(4) 3/1/2023 $ 110.0 LIBOR + 1.40% 2.30% 3/1/2021 Fund X (3)(4) 7/1/2024 400.0 LIBOR + 1.65% 3.44% 7/1/2022 $ 510.0 ___________________________________________________ (1) See Note 5 for more information regarding our unconsolidated Funds. (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, 2018 , assuming a zero -percent LIBOR interest rate during the remaining life of the swap, the maximum future payments under the swap agreement were $2.2 million . (3) Floating rate term loan, swapped to fixed, which is secured by six properties and requires monthly payments of interest only, with the outstanding principal due upon maturity. As of December 31, 2018 , assuming a zero -percent LIBOR interest rate during the remaining life of the swap, the maximum future payments under the swap agreement were $25.4 million . Loan agreement includes the requirement to purchase an interest rate cap if one month LIBOR equals or exceeds 3.56% for fourteen consecutive days after the related swap matures. (4) Loan agreement includes a zero -percent LIBOR floor. The corresponding swaps do not include such a floor.

Quarterly Financial Informati_2

Quarterly Financial Information (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	The tables below present selected quarterly information for 2018 and 2017 : 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 Three Months Ended (In thousands, except per share amounts) March 31, June 30, 2017 September 30, 2017 December 31, 2017 Total revenue $ 194,481 $ 199,632 $ 208,749 $ 209,190 Net income before noncontrolling interests $ 21,780 $ 22,153 $ 28,508 $ 31,986 Net income attributable to common stockholders $ 19,049 $ 20,244 $ 25,614 $ 29,536 Net income per common share - basic $ 0.12 $ 0.13 $ 0.15 $ 0.17 Net income per common share - diluted $ 0.12 $ 0.13 $ 0.15 $ 0.17 Weighted average shares of common stock outstanding - basic 152,490 155,898 165,471 169,521 Weighted average shares of common stock and common stock equivalents outstanding - diluted 153,655 155,952 165,520 169,562

Overview - Narrative (Details)

Overview - Narrative (Details) ft² in Millions, $ in Millions	Dec. 31, 2018USD ($)ft²land_parcelunit
Real Estate Properties [Line Items]
Variable interest entity, assets	$ 8,260
Variable interest entity, assets related to real estate held for investment	7,780
Variable interest entity, liabilities	4,410
Variable interest entity, equity	3,850
Variable interest entity, equity portion attributable to noncontrolling interest	$ 1,450
Wholly Owned and Consolidated Properties [Member]
Real Estate Properties [Line Items]
Number of land parcels not included in portfolio | land_parcel	2
Wholly Owned and Consolidated Properties [Member] | Office
Real Estate Properties [Line Items]
Area of real estate portfolio (sq ft) | ft²	16.6
Wholly Owned and Consolidated Properties [Member] | Multifamily [Member]
Real Estate Properties [Line Items]
Number of multifamily apartment units | unit	3,595
Unconsolidated Fund Properties | Office
Real Estate Properties [Line Items]
Area of real estate portfolio (sq ft) | ft²	1.8

Overview - Schedule of Properti

Overview - Schedule of Properties Portfolio (Details)	Dec. 31, 2018property
Real Estate Properties [Line Items]
Number of properties	81
Office
Real Estate Properties [Line Items]
Number of properties	71
Wholly Owned Properties | Office
Real Estate Properties [Line Items]
Number of properties	53
Wholly Owned Properties | Multifamily [Member]
Real Estate Properties [Line Items]
Number of properties	10
Consolidated JV Properties [Member] | Office
Real Estate Properties [Line Items]
Number of properties	10
Unconsolidated Fund Properties | Office
Real Estate Properties [Line Items]
Number of properties	8
Reportable Legal Entities [Member]
Real Estate Properties [Line Items]
Number of properties	73
Reportable Legal Entities [Member] | Office
Real Estate Properties [Line Items]
Number of properties	63
Reportable Legal Entities [Member] | Wholly Owned Properties | Office
Real Estate Properties [Line Items]
Number of properties	53
Reportable Legal Entities [Member] | Wholly Owned Properties | Multifamily [Member]
Real Estate Properties [Line Items]
Number of properties	10
Reportable Legal Entities [Member] | Consolidated JV Properties [Member] | Office
Real Estate Properties [Line Items]
Number of properties	10
Reportable Legal Entities [Member] | Unconsolidated Fund Properties | Office
Real Estate Properties [Line Items]
Number of properties	0

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended								12 Months Ended
	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2018USD ($)segmentfund	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Real Estate Properties [Line Items]
Development costs capitalized									$ 78,700,000	$ 66,000,000	$ 31,600,000
Interest costs capitalized									3,500,000	2,700,000	1,200,000
Total basis difference	$ 2,200,000				$ 2,900,000				2,200,000	2,900,000
Impairment of long-lived assets									0	0	0
Straight-line rent recognized									18,813,000	12,855,000	13,599,000
Lease termination revenue									1,600,000	2,100,000	2,400,000
Revenues	226,292,000	$ 223,308,000	$ 219,469,000	$ 212,247,000	209,190,000	$ 208,749,000	$ 199,632,000	$ 194,481,000	881,316,000	812,052,000	742,551,000
Parking revenue									102,500,000	96,200,000	88,800,000
Parking receivables	$ 1,100,000				$ 1,000,000				$ 1,100,000	1,000,000
Number of reportable business segments | segment									2
Percentage of minimum distribution of taxable income to qualify as a REIT (at least)	90.00%								90.00%
Partnership X
Real Estate Properties [Line Items]
Equity interest of the Fund (percent)	24.50%								24.50%
Fund X
Real Estate Properties [Line Items]
Equity interest of the Fund (percent)	71.30%								71.30%
Opportunity Fund
Real Estate Properties [Line Items]
Equity interest of the Fund (percent)	6.20%								6.20%
Unconsolidated Properties
Real Estate Properties [Line Items]
Number of real estate funds owned and managed | fund									3
Buildings
Real Estate Properties [Line Items]
Estimated useful life									40 years
Site Improvements
Real Estate Properties [Line Items]
Estimated useful life									15 years
Rental Revenue - Leasehold Improvements
Real Estate Properties [Line Items]
Revenues									$ 3,500,000	$ 2,600,000	$ 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, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Letters of credit from our tenants	$ 27,749	$ 25,212
Cash security deposits from our tenants	50,733	50,414
Tenant Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	5,215	3,062
Increase (decrease) in net income from change in receivable allowance	(2,154)	(406)	$ (422)
Deferred Rent Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	2,849	3,405
Increase (decrease) in net income from change in receivable allowance	$ 556	$ 1,739	$ 898

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - New Accounting Pronouncements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease costs capitalized	$ 7,900
Hypothetical decrease to net income if previously capitalized leasing costs were expensed	$ 6,000
AOCI
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment related to adoption of new accounting standard		$ 211
Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment related to adoption of new accounting standard		(211)
ASU No. 2017-12 | AOCI
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment related to adoption of new accounting standard		211
ASU No. 2017-12 | Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment related to adoption of new accounting standard		$ (211)

Investment in Real Estate - 201

Investment in Real Estate - 2017 Acquisitions (Details) ft² in Thousands, $ in Thousands	Dec. 20, 2017USD ($)ft²	Jul. 20, 2017USD ($)ft²	Apr. 25, 2017USD ($)ft²	Dec. 31, 2017USD ($)property	Dec. 31, 2016property
Real Estate Acquisition [Line Items]
Joint venture, contributions received				$ 284,000
Office
Real Estate Acquisition [Line Items]
Number of properties acquired | property				1
Consolidated JV | Office
Real Estate Acquisition [Line Items]
Number of properties acquired | property				3	2
1299 Ocean | Consolidated JV
Real Estate Acquisition [Line Items]
Contract price			$ 275,800
Building square footage | ft²			206
Investment in real estate:
Land			$ 22,748
Buildings and improvements			260,188
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
429 Santa Monica | Consolidated JV
Real Estate Acquisition [Line Items]
Contract price			$ 77,000
Building square footage | ft²			87
Investment in real estate:
Land			$ 4,949
Buildings and improvements			69,286
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
9665 Wilshire | Consolidated JV
Real Estate Acquisition [Line Items]
Contract price		$ 177,000
Building square footage | ft²		171
Investment in real estate:
Land		$ 5,568
Buildings and improvements		175,960
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
9401 Wilshire | Consolidated JV
Real Estate Acquisition [Line Items]
Contract price	$ 143,647
Building square footage | ft²	146
Investment in real estate:
Land	$ 6,740
Buildings and improvements	144,467
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
Principal balance of loan assumed at acquisition	$ 32,300

Investment in Real Estate - 2_2

Investment in Real Estate - 2016 Acquisitions - Westwood Portfolio Purchase Accounting (Details) ft² in Thousands	May 31, 2016USD ($)	Feb. 29, 2016USD ($)property	Dec. 31, 2016USD ($)ft²	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)property	Dec. 31, 2016USD ($)ft²property	Jul. 21, 2016
Source of funds:
Proceeds from sale of interest in joint venture			$ 51,600,000
Gains on sale of investment in real estate				$ 0	$ 0	$ 14,327,000
Line of Credit | Term Loan With Maturity Date of February 28, 2023
Source of funds:
Variable interest rate		LIBOR
Line of Credit | Term Loan With Maturity Date of February 28, 2023 | LIBOR
Source of funds:
Basis spread on variable rate		1.40%
Line of Credit | Revolving Credit Facility With Maturity Date of August 21, 2020
Source of funds:
Variable interest rate		LIBOR
Line of Credit | Revolving Credit Facility With Maturity Date of August 21, 2020 | LIBOR
Source of funds:
Basis spread on variable rate		1.40%
Secured Debt | Term Loan With Maturity Date of February 28, 2023
Source of funds:
Loan costs		$ 11,200,000
Debt instrument face amount		$ 580,000,000
Percentage of loan		100.00%
Debt instrument, term		7 years
Annual fixed interest rate		2.37%
Fixed interest rate, term		5 years
Office
Real Estate Acquisition [Line Items]
Number of properties acquired | property					1
Consolidated JV
Real Estate Acquisition [Line Items]
Percentage of equity contributed in joint venture			20.00%			20.00%	55.00%
Source of funds:
Percentage of joint venture sold			35.00%			35.00%
Gains on sale of investment in real estate						$ 587,000
Consolidated JV | Secured Debt | Term Loan With Maturity Date of February 28, 2023
Source of funds:
Variable interest rate				LIBOR + 1.40%
Annual fixed interest rate				2.37%
Consolidated JV | Secured Debt | Term Loan With Maturity Date of February 28, 2023 | LIBOR
Source of funds:
Basis spread on variable rate				1.40%
Consolidated JV | Office
Real Estate Acquisition [Line Items]
Number of properties acquired | property					3	2
Westwood Portfolio
Source of funds:
Proceeds from sale of interest in joint venture	$ 240,000,000
Additional proceeds for compensation of costs	1,100,000
Gains on sale of investment in real estate	$ 1,100,000
Weighted average useful life of acquired above- and below-market leases		4 years 5 months
Deposits in escrow		$ 75,000,000
Cash paid at closing		67,500,000
Westwood Portfolio | Consolidated JV
Real Estate Acquisition [Line Items]
Contract price		$ 1,340,000,000
Percentage of equity contributed in joint venture	30.00%	60.00%	30.00%			30.00%
Building square footage | ft²			1,725			1,725
Use of funds:
Land		$ 94,996,000
Buildings and improvements		1,236,786,000
Tenant improvements and lease intangibles		50,439,000
Acquired above- and below-market leases, net		(49,708,000)
Net assets and liabilities acquired		1,332,513,000
Source of funds:
Cash on hand		153,745,000
Noncontrolling interests		320,000,000
Total source of funds		1,332,513,000
Percentage of joint venture sold	30.00%
Westwood Portfolio | Consolidated JV | Line of Credit
Source of funds:
Credit facility		290,000,000
Westwood Portfolio | Consolidated JV | Secured Debt
Source of funds:
Non-resourse term loan, net		$ 568,768,000
Westwood Portfolio | Consolidated JV | Office
Real Estate Acquisition [Line Items]
Number of properties acquired | property		4
Westwood Portfolio | Consolidated JV | Pro Forma Sell Down Adjustment
Source of funds:
Noncontrolling interests	$ 240,000,000
Westwood Portfolio | Consolidated JV | Pro Forma Sell Down Adjustment | Line of Credit
Source of funds:
Credit facility	$ (240,000,000)
Westwood Portfolio | Consolidated JV | Pro Forma
Use of funds:
Land			$ 94,996,000			$ 94,996,000
Buildings and improvements			1,236,786,000			1,236,786,000
Tenant improvements and lease intangibles			50,439,000			50,439,000
Acquired above- and below-market leases, net			(49,708,000)			(49,708,000)
Net assets and liabilities acquired			$ 1,332,513,000			1,332,513,000
Source of funds:
Cash on hand						153,745,000
Noncontrolling interests						560,000,000
Total source of funds						1,332,513,000
Westwood Portfolio | Consolidated JV | Pro Forma | Line of Credit
Source of funds:
Credit facility						50,000,000
Westwood Portfolio | Consolidated JV | Pro Forma | Secured Debt
Source of funds:
Non-resourse term loan, net						$ 568,768,000

Investment in Real Estate - 2_3

Investment in Real Estate - 2016 Acquisitions - Westwood Portfolio Revenue and Net Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate Acquisition [Line Items]
Revenues	$ 226,292	$ 223,308	$ 219,469	$ 212,247	$ 209,190	$ 208,749	$ 199,632	$ 194,481	$ 881,316	$ 812,052	$ 742,551
Net income attributable to common stockholders	$ 25,635	$ 30,561	$ 31,684	$ 28,206	$ 29,536	$ 25,614	$ 20,244	$ 19,049	116,086	94,443	85,397
Office rental
Real Estate Acquisition [Line Items]
Revenues									777,931	715,546	645,633
Westwood Portfolio
Real Estate Acquisition [Line Items]
Net income attributable to common stockholders									6,163	6,346	2,998
Net income attributable to common stockholders excluding transaction costs									6,200	6,300	5,000
Westwood Portfolio | Office rental
Real Estate Acquisition [Line Items]
Revenues									$ 102,398	$ 96,106	$ 80,464

Investment in Real Estate - 2_4

Investment in Real Estate - 2016 Acquisitions - Westwood Portfolio Pro Forma Results (Details) - Westwood Portfolio $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)$ / shares
Real Estate Acquisition [Line Items]
Pro forma revenues | $	$ 755,878
Pro forma net income attributable to common stockholders | $	$ 84,319
Pro forma net income attributable to common stockholders per share - basic (usd per share) | $ / shares	$ 0.56
Pro forma net income attributable to common stockholders per share - diluted (usd per share) | $ / shares	$ 0.55

Investment in Real Estate - Oth

Investment in Real Estate - Other 2016 Acquisitions and Disposition Narrative (Details) ft² in Thousands, $ in Thousands	5 Months Ended	12 Months Ended
	Dec. 31, 2016USD ($)ft²	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)property	Dec. 31, 2016USD ($)ft²property	Jul. 21, 2016
Real Estate Acquisition [Line Items]
Proceeds from sale of interest in joint venture	$ 51,600
Proceeds from sale of interest in real estate held for investment, compensation	$ 194
Gains on sale of investment in real estate		$ 0	$ 0	$ 14,327
Joint venture, contributions received			$ 284,000
Office
Real Estate Acquisition [Line Items]
Number of properties acquired | property			1
Sherman Oaks | Office
Real Estate Acquisition [Line Items]
Gains on sale of investment in real estate				$ 12,700
Building square footage | ft²	168			168
Real estate held for sale, carrying value	$ 42,800			$ 42,800
Contract price in real estate transaction				56,700
Sales of real estate, transaction costs				$ 1,200
Investor
Real Estate Acquisition [Line Items]
Joint venture, contributions received	$ 139,800
Investors ownership percentage in joint venture				80.00%
Consolidated JV
Real Estate Acquisition [Line Items]
Percentage of equity contributed in joint venture	20.00%			20.00%	55.00%
Percentage of joint venture sold	35.00%			35.00%
Gains on sale of investment in real estate				$ 587
Consolidated JV | Office
Real Estate Acquisition [Line Items]
Number of properties acquired | property			3	2
Consolidated JV | Secured Debt | Term Loan With Maturity Date of July 21, 2019
Real Estate Acquisition [Line Items]
Proceeds from non-recourse loan				$ 146,000
Debt instrument, term				3 years
Variable interest rate				LIBOR
Consolidated JV | Secured Debt | Term Loan With Maturity Date of July 21, 2019 | LIBOR
Real Estate Acquisition [Line Items]
Basis spread on variable rate				1.55%

Investment in Real Estate - O_2

Investment in Real Estate - Other 2016 Acquisitions (Details) - Consolidated JV ft² in Thousands, $ in Thousands	Sep. 27, 2016USD ($)ft²	Jul. 21, 2016USD ($)ft²
12100 Wilshire
Real Estate Acquisition [Line Items]
Contract price		$ 225,000
Building square footage | ft²		365
Investment in real estate:
Land		$ 20,164
Buildings and improvements		199,698
Tenant improvements and lease intangibles		9,057
Acquired above- and below-market leases, net		(4,523)
Net assets and liabilities acquired		$ 224,396
233 Wilshire
Real Estate Acquisition [Line Items]
Contract price	$ 139,500
Building square footage | ft²	129
Investment in real estate:
Land	$ 9,263
Buildings and improvements	126,938
Tenant improvements and lease intangibles	3,488
Acquired above- and below-market leases, net	(1,838)
Net assets and liabilities acquired	$ 137,851

Acquired Lease Intangibles - Su

Acquired Lease Intangibles - Summary of Acquired Lease Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, net	$ 3,251	$ 4,293
Acquired lease intangible liabilities, net	52,569	75,635
Above-Market Tenant Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, gross	5,595	7,177
Accumulated amortization	(3,289)	(3,846)
Below-Market Tenant Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible liabilities, gross	112,175	127,606
Accumulated accretion	(63,013)	(55,428)
Above-Market Ground Lease
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, gross	1,152	1,152
Accumulated amortization	(207)	(190)
Acquired lease intangible liabilities, gross	4,017	4,017
Accumulated accretion	$ (610)	$ (560)

Acquired Lease Intangibles - Im

Acquired Lease Intangibles - Impact on Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	$ 22,025	$ 18,006	$ 18,198
Rental Revenue | Tenant Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	21,992	17,973	18,165
Office Parking and Other Income | Above-Market Ground Lease
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	(17)	(17)	(17)
Office Expense | Above-Market Ground Lease
Acquired Finite-Lived Intangible Assets [Line Items]
Accretion of above- and below-market leases	$ 50	$ 50	$ 50

Acquired Lease Intangibles - Es

Acquired Lease Intangibles - Estimated Future Net Accretion (Details) $ in Thousands	Dec. 31, 2018USD ($)
Estimated Future Net Accretion [Abstract]
2,019	$ 15,521
2,020	12,516
2,021	6,813
2,022	4,157
2,023	2,542
Thereafter	4,362
Total	$ 45,911

Investments in Unconsolidated_3

Investments in Unconsolidated Real Estate Funds - Narrative (Details) ft² in Millions	3 Months Ended			12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2018ft²fundproperty
Schedule of Equity Method Investments [Line Items]
Number of office properties				81
Amounts related to the Fund (percent)				100.00%
Opportunity Fund
Schedule of Equity Method Investments [Line Items]
Purchase of equity interest (percent)		2.50%	3.70%
Equity interest of the Fund (percent)				6.20%
Fund X
Schedule of Equity Method Investments [Line Items]
Purchase of equity interest (percent)	1.90%
Equity interest of the Fund (percent)				71.30%
Fund X Indirect
Schedule of Equity Method Investments [Line Items]
Equity interest of the Fund (percent)				13.10%
Partnership X
Schedule of Equity Method Investments [Line Items]
Equity interest of the Fund (percent)				24.50%
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				71
Office | Unconsolidated Fund Properties
Schedule of Equity Method Investments [Line Items]
Number of office properties				8
Area of real estate portfolio (sq ft) | ft²				1.8

Investments in Unconsolidated_4

Investments in Unconsolidated Real Estate Funds - Summary of Cash Distributions Received from Funds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate Investments, Net [Abstract]
Operating distributions received	$ 6,400	$ 5,905	$ 2,668
Capital distributions received	7,349	43,560	24,170
Total distributions received	$ 13,749	$ 49,465	$ 26,838

Investments in Unconsolidated_5

Investments in Unconsolidated Real Estate Funds - Summary of Statement of Financial Position Information for Funds (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Real Estate Investments, Net [Abstract]
Total assets	$ 694,713	$ 704,186
Total liabilities	525,483	523,767
Total equity	$ 169,230	$ 180,419

Investments in Unconsolidated_6

Investments in Unconsolidated Real Estate Funds - Summary of Statement of Operations Information for Funds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate Investments, Net [Abstract]
Total revenues	$ 79,590	$ 75,896	$ 73,171
Operating income	22,959	20,640	19,477
Net income	$ 6,260	$ 5,085	$ 8,213

Other Assets - Summary of Other

Other Assets - Summary of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Assets [Abstract]
Restricted cash	$ 121	$ 121
Prepaid expenses	7,830	9,235
Other indefinite-lived intangibles	1,988	1,988
Furniture, fixtures and equipment, net	1,101	1,155
Other	3,719	5,943
Total other assets	$ 14,759	$ 18,442

Secured Notes Payable and Rev_3

Secured Notes Payable and Revolving Credit Facility, Net - Schedule of Secured Notes Payable and Revolving Credit Facility (Details)	Feb. 29, 2016	Dec. 31, 2018USD ($)propertycollateral_poolRate	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Principal Balance		$ 4,163,982,000	$ 4,152,308,000
Unamortized loan premium, net		3,986,000	4,191,000
Unamortized deferred loan costs, net		(33,938,000)	(39,109,000)
Total Consolidated Debt, net		$ 4,134,030,000	4,117,390,000
Number of properties in collateral pools | property		1
Revolving Credit Facility With Maturity Date of August 21, 2020
Debt Instrument [Line Items]
Number of collateral pools | collateral_pool		1
Maximum borrowing capacity		$ 400,000,000
Revolving Credit Facility With Maturity Date of August 21, 2020 | Minimum
Debt Instrument [Line Items]
Unused commitment fees (percent) | Rate		0.15%
Revolving Credit Facility With Maturity Date of August 21, 2020 | Maximum
Debt Instrument [Line Items]
Unused commitment fees (percent) | Rate		0.20%
Secured Debt | LIBOR | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		0.00%
Secured Debt | Term Loan With Maturity Date of June 1, 2038
Debt Instrument [Line Items]
Debt amortization period		30 years
Secured Debt | Term Loan With Maturity Date of February 28, 2023
Debt Instrument [Line Items]
Fixed Interest Rate	2.37%
Line of Credit | Revolving Credit Facility With Maturity Date of August 21, 2020
Debt Instrument [Line Items]
Principal Balance		$ 105,000,000
Variable Interest Rate	LIBOR
Line of Credit | Revolving Credit Facility With Maturity Date of August 21, 2020 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.40%
Line of Credit | Term Loan With Maturity Date of February 28, 2023
Debt Instrument [Line Items]
Variable Interest Rate	LIBOR
Line of Credit | Term Loan With Maturity Date of February 28, 2023 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.40%
Wholly Owned Subsidiaries
Debt Instrument [Line Items]
Principal Balance		3,183,982,000	3,172,308,000
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 4.00%
Debt Instrument [Line Items]
Principal Balance		0	146,974,000
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 3.85%
Debt Instrument [Line Items]
Principal Balance		$ 0	280,721,000
Wholly Owned Subsidiaries | Secured Debt | Fannie Mae Loan With Maturity Date of October 1, 2019
Debt Instrument [Line Items]
Maturity Date		Oct. 1, 2019
Principal Balance		$ 145,000,000	145,000,000
Variable Interest Rate		LIBOR + 1.25%
Wholly Owned Subsidiaries | Secured Debt | Fannie Mae Loan With Maturity Date of October 1, 2019 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.25%
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 2.77%
Debt Instrument [Line Items]
Maturity Date		Apr. 15, 2022
Principal Balance		$ 340,000,000	340,000,000
Variable Interest Rate		LIBOR + 1.40%
Fixed Interest Rate		2.77%
Swap Maturity Date		Apr. 1, 2020
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 2.77% | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.40%
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 3.06%
Debt Instrument [Line Items]
Maturity Date		Jul. 27, 2022
Principal Balance		$ 180,000,000	180,000,000
Variable Interest Rate		LIBOR + 1.45%
Fixed Interest Rate		3.06%
Swap Maturity Date		Jul. 1, 2020
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 3.06% | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.45%
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 2.64%
Debt Instrument [Line Items]
Maturity Date		Nov. 1, 2022
Principal Balance		$ 400,000,000	400,000,000
Variable Interest Rate		LIBOR + 1.35%
Fixed Interest Rate		2.64%
Swap Maturity Date		Nov. 1, 2020
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 2.64% | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.35%
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 2.57%
Debt Instrument [Line Items]
Maturity Date		Jun. 23, 2023
Principal Balance		$ 360,000,000	360,000,000
Variable Interest Rate		LIBOR + 1.55%
Fixed Interest Rate		2.57%
Swap Maturity Date		Jul. 1, 2021
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 2.57% | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.55%
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 3.62%
Debt Instrument [Line Items]
Maturity Date		Dec. 23, 2023
Principal Balance		$ 220,000,000	220,000,000
Variable Interest Rate		LIBOR + 1.70%
Fixed Interest Rate		3.62%
Swap Maturity Date		Dec. 23, 2021
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 3.62% | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.70%
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 3.46%
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 With Effective Annual Fixed Interest Rate At 3.46% | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.55%
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 3.84%
Debt Instrument [Line Items]
Maturity Date		Mar. 3, 2025
Principal Balance		$ 335,000,000	0
Variable Interest Rate		LIBOR + 1.30%
Fixed Interest Rate		3.84%
Swap Maturity Date		Mar. 1, 2023
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Effective Annual Fixed Interest Rate At 3.84% | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.30%
Wholly Owned Subsidiaries | Secured Debt | Fannie Mae Loan With Maturity Date of April 1, 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, 2020
Wholly Owned Subsidiaries | Secured Debt | Fannie Mae Loan With Maturity Date of April 1, 2025 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.25%
Wholly Owned Subsidiaries | Secured Debt | Fannie Mae Loan With Maturity Date of December 1, 2025
Debt Instrument [Line Items]
Maturity Date		Dec. 1, 2025
Principal Balance		$ 115,000,000	115,000,000
Variable Interest Rate		LIBOR + 1.25%
Fixed Interest Rate		2.76%
Swap Maturity Date		Dec. 1, 2020
Wholly Owned Subsidiaries | Secured Debt | Fannie Mae Loan With Maturity Date of December 1, 2025 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.25%
Wholly Owned Subsidiaries | Secured Debt | Fannie Mae Loan With Maturity Date of June 1, 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 With Maturity Date of June 1, 2027 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.37%
Wholly Owned Subsidiaries | Secured Debt | Term Loan With Maturity Date of June 1, 2038
Debt Instrument [Line Items]
Maturity Date		Jun. 1, 2038
Principal Balance		$ 31,582,000	32,213,000
Fixed Interest Rate		4.55%
Wholly Owned Subsidiaries | Line of Credit | Revolving Credit Facility With Maturity Date of August 21, 2020
Debt Instrument [Line Items]
Maturity Date		Aug. 21, 2020
Principal Balance		$ 105,000,000	0
Variable Interest Rate		LIBOR + 1.40%
Wholly Owned Subsidiaries | Line of Credit | Revolving Credit Facility With Maturity Date of August 21, 2020 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.40%
Consolidated JV | Secured Debt | Term Loan With Maturity Date of February 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 With Maturity Date of February 28, 2023 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.40%
Consolidated JV | Secured Debt | Term Loan With Maturity Date of December 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 With Maturity Date of December 19, 2024 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.30%

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, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Principal balance of consolidated fixed rate debt	$ 3,910,000
Weighted average remaining life (including extension options) of consolidated fixed rate debt (in years)	5 years 5 months
Weighted average remaining fixed interest period of consolidated fixed rate debt (in years)	2 years 7 months
Weighted average annual interest rate of consolidated fixed rate debt (percent)	3.07%
Debt Instrument [Line Items]
Principal Balance	$ 4,163,982	$ 4,152,308
Aggregate swapped to fixed rate loans
Debt Instrument [Line Items]
Principal Balance	3,882,400	3,547,400
Aggregate fixed rate loans
Debt Instrument [Line Items]
Principal Balance	31,582	459,908
Aggregate floating rate loans
Debt Instrument [Line Items]
Principal Balance	$ 250,000	$ 145,000

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, 2018	Dec. 31, 2017
Excluding Maturity Extension Options
2,019	$ 145,718
2,020	400,752
2,021	787
2,022	1,040,823
2,023	1,495,862
Thereafter	1,080,040
Total future principal payments	4,163,982	$ 4,152,308
Including Maturity Extension Options
2,019	145,718
2,020	105,752
2,021	787
2,022	920,823
2,023	1,160,862
Thereafter	1,830,040
Total future principal payments	$ 4,163,982	$ 4,152,308

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Accumulated amortization on deferred loan costs	$ 24,200	$ 18,000
Loan Costs Included in Interest Expense
Deferred loan cost amortization	8,292	10,834	$ 8,927
Interest Expense
Loan Costs Included in Interest Expense
Loan costs expensed	418	2,359	1,441
Deferred loan cost amortization	7,874	9,033	7,608
Total	$ 8,292	$ 11,392	$ 9,049

Interest Payable, Accounts Pa_3

Interest Payable, Accounts Payable and Deferred Revenue - Summary of Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts Payable and Accrued Liabilities [Abstract]
Interest payable	$ 10,657	$ 9,829
Accounts payable and accrued liabilities	75,111	62,741
Deferred revenue	44,386	31,377
Total interest payable, accounts payable and deferred revenue	$ 130,154	$ 103,947

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, 2018USD ($)instrument
Derivative [Line Items]
Number of Interest Rate Swaps | instrument	27
Notional | $	$ 3,882,400
Unconsolidated Funds
Derivative [Line Items]
Number of Interest Rate Swaps | instrument	4
Notional | $	$ 510,000
Percent of notional amount related to the Fund	100.00%

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, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Fair value derivatives in a net liability position	$ 1,681	$ 915
Unconsolidated Funds
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, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivatives in an asset position	$ 73,414	$ 60,069
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	76,021	60,093
Interest Rate Swap | Derivatives Designated as Cash Flow Hedges | Cash Flow Hedging | Unconsolidated Funds
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivatives in an asset position	$ 12,576	$ 9,350
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, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Gain recorded in AOCI - Adoption of ASU 2017-12	$ 211	$ 0	$ 0
Gain (loss) recorded in AOCI	22,723
Gain recorded in AOCI		16,512	14,192
Interest expense	(133,402)	(145,176)	(146,148)
Income, including depreciation, from unconsolidated real estate funds	6,400	5,905	7,812
Unconsolidated Funds
Derivative [Line Items]
Gain (loss) recorded in AOCI	3,052
Gain recorded in AOCI		3,275	8
Cash Flow Hedging | Derivatives Designated as Cash Flow Hedges
Derivative [Line Items]
Gain recorded in AOCI - Adoption of ASU 2017-12	211	0	0
Gain (loss) recorded in AOCI	22,723
Gain recorded in AOCI		16,512	14,192
(Gain) loss reclassified from AOCI	(10,103)
(Gain) loss reclassified from AOCI		13,976	25,917
Cash Flow Hedging | Derivatives Designated as Cash Flow Hedges | Interest Expense
Derivative [Line Items]
(Gain) loss related to ineffectiveness recorded in Interest Expense	0	51	(196)
Cash Flow Hedging | Derivatives Designated as Cash Flow Hedges | Unconsolidated Funds
Derivative [Line Items]
Gain (loss) recorded in AOCI	3,052
Gain recorded in AOCI		3,275	8
(Gain) loss reclassified from AOCI	$ (813)
(Gain) loss reclassified from AOCI		$ 527	$ 357

Derivative Contracts - Future R

Derivative Contracts - Future Reclassifications from AOCI (Details) $ in Thousands	Dec. 31, 2018USD ($)
Derivative [Line Items]
Derivative designated as cash flow hedge to be reclassified	$ 36,161
Unconsolidated Funds
Derivative [Line Items]
Derivative designated as cash flow hedge to be reclassified	$ 2,565

Equity - Narrative (Details)

Equity - Narrative (Details) $ in Thousands	5 Months Ended	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2018USD ($)shares	Dec. 31, 2017USD ($)propertyshares	Dec. 31, 2016USD ($)propertyshares
Schedule of Equity Method Investments [Line Items]
Number of OP Units converted to shares of common stock (in shares) | shares		629,000	1,100,000	1,800,000
Number of OP Units redeemed (in shares) | shares		3,000	248,000	25,000
OP Units redeemed with cash		$ 108	$ 10,104	$ 826
Shares of common stock issued for exercise of stock options (in shares) | shares		21,000	1,300,000	1,500,000
Number of stock options exercised (in shares) | shares		49,000	3,920,000	7,566,000
Issuance of common stock (in shares) | shares			15,700,000	1,400,000
Net proceeds on issuance of common stock			$ 593,300	$ 49,400
OP Units issued in acquisition (in shares) | shares			2,600,000
Issuance of OP Units for acquisition of real estate			$ 105,687
Joint venture, contributions received			$ 284,000
Common stock, outstanding (in shares) | shares		170,214,809	169,564,927
Number of OP Units and fully-vested LTIP Units outstanding (in shares) | shares		28,200,000
Number of shares of common stock issued upon redemption of one OP Unit (in shares) | shares		1
Investor
Schedule of Equity Method Investments [Line Items]
Joint venture, contributions received	$ 139,800
Westwood Portfolio JV | Investor
Schedule of Equity Method Investments [Line Items]
Investors' ownership in joint venture (percent)	70.00%			70.00%
Investors contribution to joint venture	$ 320,000			$ 320,000
Investors' ownership acquired during period through direct investment (percent)				40.00%
Westwood Portfolio JV | Corporate Joint Venture
Schedule of Equity Method Investments [Line Items]
Percentage of joint venture sold	30.00%			30.00%
Proceeds from divestiture of partial interest in joint venture				$ 241,100
Gain on sale of interest in joint venture				$ 1,100
Wilshire Properties JV | Investor
Schedule of Equity Method Investments [Line Items]
Investors' ownership in joint venture (percent)	80.00%			80.00%
Investors contribution to joint venture	$ 139,800			$ 139,800
Wilshire Properties JV | Corporate Joint Venture
Schedule of Equity Method Investments [Line Items]
Percentage of joint venture sold	35.00%			35.00%
Proceeds from divestiture of partial interest in joint venture				$ 51,600
Gain on sale of interest in joint venture				$ 587
Consolidated JV
Schedule of Equity Method Investments [Line Items]
Percentage of joint venture sold	35.00%			35.00%
Partnership Interest | Operating Partnership
Schedule of Equity Method Investments [Line Items]
Investors' ownership in joint venture (percent)		14.00%
Office
Schedule of Equity Method Investments [Line Items]
Number of properties acquired | property			1
Office | Consolidated JV
Schedule of Equity Method Investments [Line Items]
Number of properties acquired | property			3	2
Office | Other 2016 Acquisition | Consolidated JV
Schedule of Equity Method Investments [Line Items]
Number of properties acquired | property				2

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stockholders' Equity Attributable to Parent [Abstract]
Net income attributable to common stockholders	$ 25,635	$ 30,561	$ 31,684	$ 28,206	$ 29,536	$ 25,614	$ 20,244	$ 19,049	$ 116,086	$ 94,443	$ 85,397
Transfers from noncontrolling interests:
Exchange of OP Units with noncontrolling interests									10,292	14,242	23,060
Repurchase of OP Units from noncontrolling interests									(59)	(6,764)	(498)
Net transfers from noncontrolling interests									10,233	7,478	22,562
Change from net income attributable to common stockholders and transfers from noncontrolling interests									$ 126,319	$ 101,921	$ 107,959

Equity - Accumulated Other Comp

Equity - Accumulated Other Comprehensive Income Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 3,902,049	$ 3,014,071	$ 2,281,548
Other comprehensive income before reclassifications	22,723	16,512	14,192
Reclassification of (gains) losses from AOCI	(10,103)	13,976	25,917
Net current period OCI	15,070	34,290	40,474
OCI attributable to noncontrolling interests	(4,225)	(6,347)	(16,033)
OCI attributable to common stockholders	10,845	27,943	24,441
Ending balance	3,848,430	3,902,049	3,014,071
Fund X
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income before reclassifications	3,052	3,275	8
Reclassification of (gains) losses from AOCI	(813)	527	357
AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	43,099	15,156	(9,285)
Beginning balance adjustment - ASU 2017-12 adoption				$ 211
Ending balance	$ 53,944	$ 43,099	$ 15,156

Equity - Dividends (Details)

Equity - Dividends (Details) - $ / shares	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018
Dividends, Common Stock [Abstract]
Record Date	Sep. 28, 2018	Jun. 29, 2018	Mar. 29, 2018	Dec. 29, 2017
Paid Date	Oct. 16, 2018	Jul. 13, 2018	Apr. 17, 2018	Jan. 15, 2018
Dividend Per Share (usd per share)	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 1
Ordinary Income Percentage (percent)	32.50%	32.50%	32.50%	32.50%	32.50%
Capital Gain Percentage (percent)	0.00%	0.00%	0.00%	0.00%	0.00%
Return of Capital Percentage (percent)	67.50%	67.50%	67.50%	67.50%	67.50%
Amount Qualifying as a Section 199A Dividend (percent)	32.50%	32.50%	32.50%	32.50%	32.50%

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income attributable to common stockholders	$ 25,635	$ 30,561	$ 31,684	$ 28,206	$ 29,536	$ 25,614	$ 20,244	$ 19,049	$ 116,086	$ 94,443	$ 85,397
Allocation to participating securities: Unvested LTIP Units									(546)	(626)	(468)
Numerator for basic and diluted net income attributable to common stockholders									$ 115,540	$ 93,817	$ 84,929
Weighted average shares of common stock outstanding - basic (in shares)	170,121	169,926	169,916	169,601	169,521	165,471	155,898	152,490	169,893	160,905	149,299
Effect of dilutive securities: Stock options (in shares)									9	325	3,891
Weighted average shares of common stock and common stock equivalents outstanding - diluted (in shares)	170,121	169,931	169,926	169,625	169,562	165,520	155,952	153,655	169,902	161,230	153,190
Basic EPS:
Net income attributable to common stockholders per share – basic (usd per share)	$ 0.15	$ 0.18	$ 0.19	$ 0.17	$ 0.17	$ 0.15	$ 0.13	$ 0.12	$ 0.68	$ 0.58	$ 0.57
Diluted EPS:
Net income attributable to common stockholders per share – diluted (usd per share)	$ 0.15	$ 0.18	$ 0.19	$ 0.17	$ 0.17	$ 0.15	$ 0.13	$ 0.12	$ 0.68	$ 0.58	$ 0.55
OP Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation fo weighted average diluted shares (in shares)									26,661	24,810	25,110
Vested LTIP Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation fo weighted average diluted shares (in shares)									813	274	578

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)installmentshares	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)	3,400,000
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)	898,000	800,000	704,000
Stock-based compensation expense | $	$ 22,299	$ 18,478	$ 17,448
Capitalized stock-based compensation | $	5,006	$ 2,537	$ 1,503
Unrecognized compensation cost related to nonvested options and LTIP unit awards | $	$ 19,400
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)	37,000	28,000	35,000
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 - Stoc

Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of Stock Options
Outstanding, beginning balance (in shares)	49	3,969	11,535
Exercised (in shares)	(49)	(3,920)	(7,566)
Outstanding, ending balance (in shares)	0	49	3,969	11,535
Weighted Average Exercise Price
Outstanding, beginning balance (usd per share)	$ 12.66	$ 12.43	$ 18.04
Exercised (usd per share)	$ 12.66	12.43	20.98
Outstanding, ending balance (usd per share)		$ 12.66	$ 12.43	$ 18.04
Weighted Average Remaining Contract Life, Outstanding		16 months	27 months	23 months
Total Intrinsic Value, Outstanding		$ 1,375	$ 95,770	$ 151,569
Intrinsic Value of Options Exercised	$ 1,196	$ 102,963	$ 104,108

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, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of Units
Outstanding, beginning balance (in shares)	1,056	1,040	1,096
Granted (in shares)	935	828	739
Vested (in shares)	(1,036)	(807)	(778)
Forfeited (in shares)	(10)	(5)	(17)
Outstanding, ending balance (in shares)	945	1,056	1,040
Weighted Average Grant Date Fair Value
Outstanding, beginning balance (usd per share)	$ 26.98	$ 23.46	$ 19.85
Granted (usd per share)	27.01	29.89	27.62
Vested (usd per share)	25.82	25.40	22.23
Forfeited (usd per share)	34.18	31.36	27.77
Outstanding, ending balance (usd per share)	$ 28.20	$ 26.98	$ 23.46
Grant Date Fair Value, Granted	$ 25,247	$ 24,745	$ 20,420
Grant Date Fair Value, Vested	26,740	20,497	17,293
Grant Date Fair Value, Forfeited	$ 333	$ 172	$ 473

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Estimated Fair Value of Secured Notes Payable (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured notes payable	$ 4,087,979	$ 4,195,489
Carrying value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Secured notes payable	$ 4,062,968	$ 4,156,499

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Financial Instruments Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Derivative Assets:
Fair value - derivatives	$ 73,414	$ 60,069
Derivative Liabilities:
Fair value - derivatives	$ 1,530	807
Fund X | Interest Rate Swap
Derivative Liabilities:
Percent of notional amount related to the Fund	100.00%
Level 2
Derivative Assets:
Fair value - derivatives	$ 73,414	60,069
Derivative Liabilities:
Fair value - derivatives	1,530	807
Level 2 | Fund X
Derivative Assets:
Fair value - unconsolidated Funds' derivatives	12,228	9,437
Derivative Liabilities:
Fair value - unconsolidated Funds' derivatives	$ 0	$ 0

Segment Reporting - Narrative (

Segment Reporting - Narrative (Details)	12 Months Ended
	Dec. 31, 2018segment
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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total revenue	$ 226,292	$ 223,308	$ 219,469	$ 212,247	$ 209,190	$ 208,749	$ 199,632	$ 194,481	$ 881,316	$ 812,052	$ 742,551
Segment profit									600,449	554,018	504,688
Office Segment
Segment Reporting Information [Line Items]
Total revenue									777,931	715,546	645,633
Operating expenses									(252,751)	(233,633)	(214,546)
Segment profit									525,180	481,913	431,087
Multifamily Segment
Segment Reporting Information [Line Items]
Total revenue									103,385	96,506	96,918
Operating expenses									(28,116)	(24,401)	(23,317)
Segment profit									$ 75,269	$ 72,105	$ 73,601

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting [Abstract]
Total profit from all segments									$ 600,449	$ 554,018	$ 504,688
General and administrative									(38,641)	(36,234)	(34,957)
Depreciation and amortization									(309,864)	(276,761)	(248,914)
Other income									11,414	9,712	8,759
Other expenses									(7,472)	(7,037)	(9,477)
Income, including depreciation, from unconsolidated real estate funds									6,400	5,905	7,812
Interest expense									(133,402)	(145,176)	(146,148)
Demolition expenses									(272)	0	0
Income before gains									128,612	104,427	81,763
Gains on sales of investments in real estate									0	0	14,327
Net income	$ 23,532	$ 35,416	$ 37,033	$ 32,631	$ 31,986	$ 28,508	$ 22,153	$ 21,780	128,612	104,427	96,090
Less: Net income attributable to noncontrolling interests									(12,526)	(9,984)	(10,693)
Net income attributable to common stockholders	$ 25,635	$ 30,561	$ 31,684	$ 28,206	$ 29,536	$ 25,614	$ 20,244	$ 19,049	$ 116,086	$ 94,443	$ 85,397

Future Minimum Lease Rental R_3

Future Minimum Lease Rental Receipts - Narrative (Details)	12 Months Ended
	Dec. 31, 2018land_parcel
Real Estate Properties [Line Items]
Maximum term of residential leases not included in total future minimum base rentals	1 year
Wholly Owned Properties
Real Estate Properties [Line Items]
Number of land parcels	2

Future Minimum Lease Rental R_4

Future Minimum Lease Rental Receipts - Summary of Future Minimum Rental Receipts (Details) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leases, Future Minimum Payments Receivable [Abstract]
2,019	$ 578,162
2,020	531,875
2,021	437,528
2,022	353,395
2,023	269,535
Thereafter	656,926
Total future minimum base rentals	$ 2,827,421

Future Minimum Lease Rental P_2

Future Minimum Lease Rental Payments - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Ground lease rent expense	$ 733	$ 733	$ 733
Exchange of OP Units with noncontrolling interests	10,292	$ 14,242	$ 23,060
Future ground rent payments per year	$ 733

Future Minimum Lease Rental P_3

Future Minimum Lease Rental Payments - Summary of Ground Lease Payments (Details) $ in Thousands	Dec. 31, 2018USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2,019	$ 733
2,020	733
2,021	733
2,022	733
2,023	733
Thereafter	46,178
Total future minimum lease payments	$ 49,843

Commitments, Contingencies an_3

Commitments, Contingencies and Guarantees - Narrative (Details)	12 Months Ended
	Dec. 31, 2018USD ($)apartmentbuilding	Dec. 31, 2016apartment
Loss Contingencies [Line Items]
Number of properties containing asbestos | building	28
Contractual amount for development project	$ 55,300,000
Development Projects
Loss Contingencies [Line Items]
Contractual amount for development project	$ 202,900,000
Development Projects | Hawaii
Loss Contingencies [Line Items]
Number of apartments under construction | apartment		491
Development Projects | California
Loss Contingencies [Line Items]
Expected number of apartments to be constructed | apartment	376
Maximum
Loss Contingencies [Line Items]
Amount accounts are insured for by Federal Depository Insurance Corporation	$ 250,000
Unconsolidated Funds
Loss Contingencies [Line Items]
Number of properties containing asbestos | building	4

Commitments, Contingencies an_4

Commitments, Contingencies and Guarantees - Schedule of Debt Related to Unconsolidated Funds (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)propertyday	Dec. 31, 2017USD ($)
Guarantor Obligations [Line Items]
Principal Balance	$ 4,134,030	$ 4,117,390
Partnership X
Guarantor Obligations [Line Items]
Loan Maturity Date	Mar. 1, 2023
Principal Balance	$ 110,000
Collateral, number of properties | property	2
Maximum future payments under the swap agreement	$ 2,200
Partnership X | Interest Rate Swap
Guarantor Obligations [Line Items]
Variable Interest Rate - basis spread	1.40%
Fixed Interest Rate	2.30%
Swap Maturity Date	Mar. 1, 2021
Fund X
Guarantor Obligations [Line Items]
Loan Maturity Date	Jul. 1, 2024
Principal Balance	$ 400,000
Collateral, number of properties | property	6
Maximum future payments under the swap agreement	$ 25,400
Loan agreement, one month LIBOR maximum for interest rate cap requirement	3.56%
Loan agreement, number of consecutive days | day	14
Fund X | Interest Rate Swap
Guarantor Obligations [Line Items]
Variable Interest Rate - basis spread	1.65%
Fixed Interest Rate	3.44%
Swap Maturity Date	Jul. 1, 2022
Unconsolidated Funds
Guarantor Obligations [Line Items]
Principal Balance	$ 510,000
LIBOR | Partnership X
Guarantor Obligations [Line Items]
Loan agreement LIBOR floor	0.00%
LIBOR | Fund X
Guarantor Obligations [Line Items]
Loan agreement LIBOR floor	0.00%

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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 226,292	$ 223,308	$ 219,469	$ 212,247	$ 209,190	$ 208,749	$ 199,632	$ 194,481	$ 881,316	$ 812,052	$ 742,551
Net income before noncontrolling interests	23,532	35,416	37,033	32,631	31,986	28,508	22,153	21,780	128,612	104,427	96,090
Net income attributable to common stockholders	$ 25,635	$ 30,561	$ 31,684	$ 28,206	$ 29,536	$ 25,614	$ 20,244	$ 19,049	$ 116,086	$ 94,443	$ 85,397
Net income per common share - basic (usd per share)	$ 0.15	$ 0.18	$ 0.19	$ 0.17	$ 0.17	$ 0.15	$ 0.13	$ 0.12	$ 0.68	$ 0.58	$ 0.57
Net income per common share - diluted (usd per share)	$ 0.15	$ 0.18	$ 0.19	$ 0.17	$ 0.17	$ 0.15	$ 0.13	$ 0.12	$ 0.68	$ 0.58	$ 0.55
Weighted average shares of common stock outstanding - basic (in shares)	170,121	169,926	169,916	169,601	169,521	165,471	155,898	152,490	169,893	160,905	149,299
Weighted average shares of common stock and common stock equivalents outstanding - diluted (in shares)	170,121	169,931	169,926	169,625	169,562	165,520	155,952	153,655	169,902	161,230	153,190

Schedule III - Consolidated R_2

Schedule III - Consolidated Real Estate and Accumulated Depreciation and Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Encumbrances				$ 4,163,982
Initial Cost - Land				806,432
Initial Cost - Buildings & Improvements				5,402,373
Costs Capitalized Subsequent to Acquisition - Improvements				3,819,148
Gross Carrying Amount - Land				1,080,637
Gross Carrying Amount - Buildings & Improvements				8,950,071
Gross Carrying Amount - Total	$ 9,829,208	$ 8,998,120	$ 7,266,009	10,030,708	$ 9,829,208	$ 8,998,120
Accumulated Depreciation & Amortization	2,012,752	1,789,678	1,687,998	2,246,887	2,012,752	1,789,678
Principal Balance				4,163,982	4,152,308
Aggregate cost of consolidated real estate for federal income tax purposes				6,900,000
Investment in real estate, gross [Roll Forward]
Beginning balance	9,829,208	8,998,120	7,266,009
Property acquisitions	0	707,120	1,750,828
Improvements	271,948	111,642	96,649
Developments	5,281	66,013	31,559
Properties held for sale	0	0	(186)
Removal of fully depreciated and amortized tenant improvements and lease intangibles	(75,729)	(53,687)	(146,739)
Ending balance	10,030,708	9,829,208	8,998,120
Accumulated depreciation and amortization [Roll Forward]
Beginning balance	(2,012,752)	(1,789,678)	(1,687,998)
Depreciation and amortization	(309,864)	(276,761)	(248,914)
Properties held for sale	0	0	495
Removal of fully depreciated and amortized tenant improvements and lease intangibles	75,729	53,687	146,739
Ending balance	(2,246,887)	$ (2,012,752)	$ (1,789,678)
Investment in real estate, net				7,783,821	$ 7,816,456	$ 7,208,442
Line of Credit | Revolving Credit Facility With Maturity Date of August 21, 2020
Principal Balance				105,000
Operating Property
Encumbrances				4,163,982
Initial Cost - Land				790,894
Initial Cost - Buildings & Improvements				5,402,373
Costs Capitalized Subsequent to Acquisition - Improvements				3,707,759
Gross Carrying Amount - Land				1,065,099
Gross Carrying Amount - Buildings & Improvements				8,835,856
Gross Carrying Amount - Total	9,900,955			9,900,955
Accumulated Depreciation & Amortization	2,246,887			2,246,887
Investment in real estate, gross [Roll Forward]
Ending balance	9,900,955
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(2,246,887)
Operating Property | 100 Wilshire
Encumbrances				0
Initial Cost - Land				12,769
Initial Cost - Buildings & Improvements				78,447
Costs Capitalized Subsequent to Acquisition - Improvements				145,881
Gross Carrying Amount - Land				27,108
Gross Carrying Amount - Buildings & Improvements				209,989
Gross Carrying Amount - Total	237,097			237,097
Accumulated Depreciation & Amortization	$ 67,476			67,476
Year Built	Jan. 1, 1968
Year Renovated	Jan. 1, 2002
Year Acquired	Jan. 1, 1999
Investment in real estate, gross [Roll Forward]
Ending balance	$ 237,097
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(67,476)
Operating Property | 233 Wilshire
Encumbrances				62,962
Initial Cost - Land				9,263
Initial Cost - Buildings & Improvements				130,426
Costs Capitalized Subsequent to Acquisition - Improvements				2,572
Gross Carrying Amount - Land				9,263
Gross Carrying Amount - Buildings & Improvements				132,998
Gross Carrying Amount - Total	142,261			142,261
Accumulated Depreciation & Amortization	$ 9,677			9,677
Year Built	Jan. 1, 1975
Year Acquired	Jan. 1, 2016
Investment in real estate, gross [Roll Forward]
Ending balance	$ 142,261
Accumulated depreciation and amortization [Roll Forward]
Ending balance	$ (9,677)
Operating Property | 233 Wilshire | Minimum
Year Renovated	Jan. 1, 2008
Operating Property | 233 Wilshire | Maximum
Year Renovated	Jan. 1, 2009
Operating Property | 401 Wilshire
Encumbrances				0
Initial Cost - Land				9,989
Initial Cost - Buildings & Improvements				29,187
Costs Capitalized Subsequent to Acquisition - Improvements				121,993
Gross Carrying Amount - Land				21,787
Gross Carrying Amount - Buildings & Improvements				139,382
Gross Carrying Amount - Total	$ 161,169			161,169
Accumulated Depreciation & Amortization	$ 44,421			44,421
Year Built	Jan. 1, 1981
Year Renovated	Jan. 1, 2000
Year Acquired	Jan. 1, 1996
Investment in real estate, gross [Roll Forward]
Ending balance	$ 161,169
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(44,421)
Operating Property | 429 Santa Monica
Encumbrances				33,691
Initial Cost - Land				4,949
Initial Cost - Buildings & Improvements				72,534
Costs Capitalized Subsequent to Acquisition - Improvements				2,900
Gross Carrying Amount - Land				4,949
Gross Carrying Amount - Buildings & Improvements				75,434
Gross Carrying Amount - Total	80,383			80,383
Accumulated Depreciation & Amortization	$ 4,309			4,309
Year Built	Jan. 1, 1982
Year Renovated	Jan. 1, 2016
Year Acquired	Jan. 1, 2017
Investment in real estate, gross [Roll Forward]
Ending balance	$ 80,383
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(4,309)
Operating Property | 1299 Ocean
Encumbrances				124,699
Initial Cost - Land				22,748
Initial Cost - Buildings & Improvements				265,198
Costs Capitalized Subsequent to Acquisition - Improvements				8,311
Gross Carrying Amount - Land				22,748
Gross Carrying Amount - Buildings & Improvements				273,509
Gross Carrying Amount - Total	296,257			296,257
Accumulated Depreciation & Amortization	$ 13,325			13,325
Year Built	Jan. 1, 1980
Year Renovated	Jan. 1, 2006
Year Acquired	Jan. 1, 2017
Investment in real estate, gross [Roll Forward]
Ending balance	$ 296,257
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(13,325)
Operating Property | 1901 Avenue of the Stars
Encumbrances				0
Initial Cost - Land				18,514
Initial Cost - Buildings & Improvements				131,752
Costs Capitalized Subsequent to Acquisition - Improvements				112,641
Gross Carrying Amount - Land				26,163
Gross Carrying Amount - Buildings & Improvements				236,744
Gross Carrying Amount - Total	262,907			262,907
Accumulated Depreciation & Amortization	$ 79,484			79,484
Year Built	Jan. 1, 1968
Year Renovated	Jan. 1, 2001
Year Acquired	Jan. 1, 2001
Investment in real estate, gross [Roll Forward]
Ending balance	$ 262,907
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(79,484)
Operating Property | 8484 Wilshire
Encumbrances				16,132
Initial Cost - Land				8,846
Initial Cost - Buildings & Improvements				77,780
Costs Capitalized Subsequent to Acquisition - Improvements				16,070
Gross Carrying Amount - Land				8,846
Gross Carrying Amount - Buildings & Improvements				93,850
Gross Carrying Amount - Total	102,696			102,696
Accumulated Depreciation & Amortization	$ 17,804			17,804
Year Built	Jan. 1, 1972
Year Renovated	Jan. 1, 2013
Year Acquired	Jan. 1, 2013
Investment in real estate, gross [Roll Forward]
Ending balance	$ 102,696
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(17,804)
Operating Property | 9401 Wilshire
Encumbrances				31,582
Initial Cost - Land				6,740
Initial Cost - Buildings & Improvements				152,310
Costs Capitalized Subsequent to Acquisition - Improvements				1,071
Gross Carrying Amount - Land				6,740
Gross Carrying Amount - Buildings & Improvements				153,381
Gross Carrying Amount - Total	160,121			160,121
Accumulated Depreciation & Amortization	$ 5,281			5,281
Year Built	Jan. 1, 1971
Year Acquired	Jan. 1, 2017
Investment in real estate, gross [Roll Forward]
Ending balance	$ 160,121
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(5,281)
Operating Property | 9601 Wilshire
Encumbrances				145,845
Initial Cost - Land				16,597
Initial Cost - Buildings & Improvements				54,774
Costs Capitalized Subsequent to Acquisition - Improvements				107,741
Gross Carrying Amount - Land				17,658
Gross Carrying Amount - Buildings & Improvements				161,454
Gross Carrying Amount - Total	179,112			179,112
Accumulated Depreciation & Amortization	$ 56,579			56,579
Year Built	Jan. 1, 1962
Year Renovated	Jan. 1, 2004
Year Acquired	Jan. 1, 2001
Investment in real estate, gross [Roll Forward]
Ending balance	$ 179,112
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(56,579)
Operating Property | 9665 Wilshire
Encumbrances				77,445
Initial Cost - Land				5,568
Initial Cost - Buildings & Improvements				177,072
Costs Capitalized Subsequent to Acquisition - Improvements				12,946
Gross Carrying Amount - Land				5,568
Gross Carrying Amount - Buildings & Improvements				190,018
Gross Carrying Amount - Total	195,586			195,586
Accumulated Depreciation & Amortization	$ 7,489			7,489
Year Built	Jan. 1, 1971
Year Acquired	Jan. 1, 2017
Investment in real estate, gross [Roll Forward]
Ending balance	$ 195,586
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(7,489)
Operating Property | 10880 Wilshire
Encumbrances				198,794
Initial Cost - Land				29,995
Initial Cost - Buildings & Improvements				437,514
Costs Capitalized Subsequent to Acquisition - Improvements				9,072
Gross Carrying Amount - Land				29,988
Gross Carrying Amount - Buildings & Improvements				446,593
Gross Carrying Amount - Total	476,581			476,581
Accumulated Depreciation & Amortization	$ 38,643			38,643
Year Built	Jan. 1, 1970
Year Renovated	Jan. 1, 2009
Year Acquired	Jan. 1, 2016
Investment in real estate, gross [Roll Forward]
Ending balance	$ 476,581
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(38,643)
Operating Property | 10960 Wilshire
Encumbrances				201,893
Initial Cost - Land				45,844
Initial Cost - Buildings & Improvements				429,769
Costs Capitalized Subsequent to Acquisition - Improvements				20,484
Gross Carrying Amount - Land				45,852
Gross Carrying Amount - Buildings & Improvements				450,245
Gross Carrying Amount - Total	496,097			496,097
Accumulated Depreciation & Amortization	$ 38,549			38,549
Year Built	Jan. 1, 1971
Year Renovated	Jan. 1, 2006
Year Acquired	Jan. 1, 2016
Investment in real estate, gross [Roll Forward]
Ending balance	$ 496,097
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(38,549)
Operating Property | 11777 San Vicente
Encumbrances				0
Initial Cost - Land				5,032
Initial Cost - Buildings & Improvements				15,768
Costs Capitalized Subsequent to Acquisition - Improvements				29,640
Gross Carrying Amount - Land				6,714
Gross Carrying Amount - Buildings & Improvements				43,726
Gross Carrying Amount - Total	50,440			50,440
Accumulated Depreciation & Amortization	$ 14,937			14,937
Year Built	Jan. 1, 1974
Year Renovated	Jan. 1, 1998
Year Acquired	Jan. 1, 1999
Investment in real estate, gross [Roll Forward]
Ending balance	$ 50,440
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(14,937)
Operating Property | 12100 Wilshire
Encumbrances				101,203
Initial Cost - Land				20,164
Initial Cost - Buildings & Improvements				208,755
Costs Capitalized Subsequent to Acquisition - Improvements				6,040
Gross Carrying Amount - Land				20,164
Gross Carrying Amount - Buildings & Improvements				214,795
Gross Carrying Amount - Total	234,959			234,959
Accumulated Depreciation & Amortization	$ 18,348			18,348
Year Built	Jan. 1, 1985
Year Acquired	Jan. 1, 2016
Investment in real estate, gross [Roll Forward]
Ending balance	$ 234,959
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(18,348)
Operating Property | 12400 Wilshire
Encumbrances				0
Initial Cost - Land				5,013
Initial Cost - Buildings & Improvements				34,283
Costs Capitalized Subsequent to Acquisition - Improvements				76,716
Gross Carrying Amount - Land				8,828
Gross Carrying Amount - Buildings & Improvements				107,184
Gross Carrying Amount - Total	116,012			116,012
Accumulated Depreciation & Amortization	$ 36,034			36,034
Year Built	Jan. 1, 1985
Year Acquired	Jan. 1, 1996
Investment in real estate, gross [Roll Forward]
Ending balance	$ 116,012
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(36,034)
Operating Property | 16501 Ventura
Encumbrances				39,803
Initial Cost - Land				6,759
Initial Cost - Buildings & Improvements				53,112
Costs Capitalized Subsequent to Acquisition - Improvements				10,937
Gross Carrying Amount - Land				6,759
Gross Carrying Amount - Buildings & Improvements				64,049
Gross Carrying Amount - Total	70,808			70,808
Accumulated Depreciation & Amortization	$ 13,314			13,314
Year Built	Jan. 1, 1986
Year Renovated	Jan. 1, 2012
Year Acquired	Jan. 1, 2013
Investment in real estate, gross [Roll Forward]
Ending balance	$ 70,808
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(13,314)
Operating Property | Beverly Hills Medical Center
Encumbrances				0
Initial Cost - Land				4,955
Initial Cost - Buildings & Improvements				27,766
Costs Capitalized Subsequent to Acquisition - Improvements				28,476
Gross Carrying Amount - Land				6,435
Gross Carrying Amount - Buildings & Improvements				54,762
Gross Carrying Amount - Total	61,197			61,197
Accumulated Depreciation & Amortization	$ 18,559			18,559
Year Built	Jan. 1, 1964
Year Renovated	Jan. 1, 2004
Year Acquired	Jan. 1, 2004
Investment in real estate, gross [Roll Forward]
Ending balance	$ 61,197
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(18,559)
Operating Property | Bishop Place
Encumbrances				0
Initial Cost - Land				8,317
Initial Cost - Buildings & Improvements				105,651
Costs Capitalized Subsequent to Acquisition - Improvements				58,572
Gross Carrying Amount - Land				8,833
Gross Carrying Amount - Buildings & Improvements				163,707
Gross Carrying Amount - Total	172,540			172,540
Accumulated Depreciation & Amortization	$ 57,295			57,295
Year Built	Jan. 1, 1992
Year Acquired	Jan. 1, 2004
Investment in real estate, gross [Roll Forward]
Ending balance	$ 172,540
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(57,295)
Operating Property | Bishop Square
Encumbrances				180,000
Initial Cost - Land				16,273
Initial Cost - Buildings & Improvements				213,793
Costs Capitalized Subsequent to Acquisition - Improvements				25,831
Gross Carrying Amount - Land				16,273
Gross Carrying Amount - Buildings & Improvements				239,624
Gross Carrying Amount - Total	255,897			255,897
Accumulated Depreciation & Amortization	$ 62,676			62,676
Year Built	Jan. 1, 1972
Year Renovated	Jan. 1, 1983
Year Acquired	Jan. 1, 2010
Investment in real estate, gross [Roll Forward]
Ending balance	$ 255,897
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(62,676)
Operating Property | Brentwood Court
Encumbrances				0
Initial Cost - Land				2,564
Initial Cost - Buildings & Improvements				8,872
Costs Capitalized Subsequent to Acquisition - Improvements				506
Gross Carrying Amount - Land				2,563
Gross Carrying Amount - Buildings & Improvements				9,379
Gross Carrying Amount - Total	11,942			11,942
Accumulated Depreciation & Amortization	$ 3,332			3,332
Year Built	Jan. 1, 1984
Year Acquired	Jan. 1, 2006
Investment in real estate, gross [Roll Forward]
Ending balance	$ 11,942
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(3,332)
Operating Property | Brentwood Executive Plaza
Encumbrances				39,169
Initial Cost - Land				3,255
Initial Cost - Buildings & Improvements				9,654
Costs Capitalized Subsequent to Acquisition - Improvements				32,249
Gross Carrying Amount - Land				5,921
Gross Carrying Amount - Buildings & Improvements				39,237
Gross Carrying Amount - Total	45,158			45,158
Accumulated Depreciation & Amortization	$ 13,349			13,349
Year Built	Jan. 1, 1983
Year Renovated	Jan. 1, 1996
Year Acquired	Jan. 1, 1995
Investment in real estate, gross [Roll Forward]
Ending balance	$ 45,158
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(13,349)
Operating Property | Brentwood Medical Plaza
Encumbrances				35,905
Initial Cost - Land				5,934
Initial Cost - Buildings & Improvements				27,836
Costs Capitalized Subsequent to Acquisition - Improvements				1,427
Gross Carrying Amount - Land				5,933
Gross Carrying Amount - Buildings & Improvements				29,264
Gross Carrying Amount - Total	35,197			35,197
Accumulated Depreciation & Amortization	$ 10,572			10,572
Year Built	Jan. 1, 1975
Year Acquired	Jan. 1, 2006
Investment in real estate, gross [Roll Forward]
Ending balance	$ 35,197
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(10,572)
Operating Property | Brentwood San Vicente Medical
Encumbrances				0
Initial Cost - Land				5,557
Initial Cost - Buildings & Improvements				16,457
Costs Capitalized Subsequent to Acquisition - Improvements				1,039
Gross Carrying Amount - Land				5,557
Gross Carrying Amount - Buildings & Improvements				17,496
Gross Carrying Amount - Total	23,053			23,053
Accumulated Depreciation & Amortization	$ 6,266			6,266
Year Built	Jan. 1, 1957
Year Renovated	Jan. 1, 1985
Year Acquired	Jan. 1, 2006
Investment in real estate, gross [Roll Forward]
Ending balance	$ 23,053
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(6,266)
Operating Property | Brentwood Saltair
Encumbrances				0
Initial Cost - Land				4,468
Initial Cost - Buildings & Improvements				11,615
Costs Capitalized Subsequent to Acquisition - Improvements				11,625
Gross Carrying Amount - Land				4,775
Gross Carrying Amount - Buildings & Improvements				22,933
Gross Carrying Amount - Total	27,708			27,708
Accumulated Depreciation & Amortization	$ 8,131			8,131
Year Built	Jan. 1, 1986
Year Acquired	Jan. 1, 2000
Investment in real estate, gross [Roll Forward]
Ending balance	$ 27,708
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(8,131)
Operating Property | Bundy Olympic
Encumbrances				34,273
Initial Cost - Land				4,201
Initial Cost - Buildings & Improvements				11,860
Costs Capitalized Subsequent to Acquisition - Improvements				29,416
Gross Carrying Amount - Land				6,030
Gross Carrying Amount - Buildings & Improvements				39,447
Gross Carrying Amount - Total	45,477			45,477
Accumulated Depreciation & Amortization	$ 13,909			13,909
Year Built	Jan. 1, 1991
Year Renovated	Jan. 1, 1998
Year Acquired	Jan. 1, 1994
Investment in real estate, gross [Roll Forward]
Ending balance	$ 45,477
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(13,909)
Operating Property | Camden Medical Arts
Encumbrances				38,021
Initial Cost - Land				3,102
Initial Cost - Buildings & Improvements				12,221
Costs Capitalized Subsequent to Acquisition - Improvements				27,789
Gross Carrying Amount - Land				5,298
Gross Carrying Amount - Buildings & Improvements				37,814
Gross Carrying Amount - Total	43,112			43,112
Accumulated Depreciation & Amortization	$ 13,057			13,057
Year Built	Jan. 1, 1972
Year Renovated	Jan. 1, 1992
Year Acquired	Jan. 1, 1995
Investment in real estate, gross [Roll Forward]
Ending balance	$ 43,112
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(13,057)
Operating Property | Carthay Campus
Encumbrances				48,007
Initial Cost - Land				6,595
Initial Cost - Buildings & Improvements				70,454
Costs Capitalized Subsequent to Acquisition - Improvements				5,036
Gross Carrying Amount - Land				6,594
Gross Carrying Amount - Buildings & Improvements				75,491
Gross Carrying Amount - Total	82,085			82,085
Accumulated Depreciation & Amortization	$ 12,275			12,275
Year Built	Jan. 1, 1965
Year Renovated	Jan. 1, 2008
Year Acquired	Jan. 1, 2014
Investment in real estate, gross [Roll Forward]
Ending balance	$ 82,085
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(12,275)
Operating Property | Century Park Plaza
Encumbrances				128,311
Initial Cost - Land				10,275
Initial Cost - Buildings & Improvements				70,761
Costs Capitalized Subsequent to Acquisition - Improvements				123,949
Gross Carrying Amount - Land				16,153
Gross Carrying Amount - Buildings & Improvements				188,832
Gross Carrying Amount - Total	204,985			204,985
Accumulated Depreciation & Amortization	$ 56,516			56,516
Year Built	Jan. 1, 1972
Year Renovated	Jan. 1, 1987
Year Acquired	Jan. 1, 1999
Investment in real estate, gross [Roll Forward]
Ending balance	$ 204,985
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(56,516)
Operating Property | Century Park West
Encumbrances				5,618
Initial Cost - Land				3,717
Initial Cost - Buildings & Improvements				29,099
Costs Capitalized Subsequent to Acquisition - Improvements				1,033
Gross Carrying Amount - Land				3,667
Gross Carrying Amount - Buildings & Improvements				30,182
Gross Carrying Amount - Total	33,849			33,849
Accumulated Depreciation & Amortization	$ 11,273			11,273
Year Built	Jan. 1, 1971
Year Acquired	Jan. 1, 2007
Investment in real estate, gross [Roll Forward]
Ending balance	$ 33,849
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(11,273)
Operating Property | Columbus Center
Encumbrances				14,362
Initial Cost - Land				2,096
Initial Cost - Buildings & Improvements				10,396
Costs Capitalized Subsequent to Acquisition - Improvements				9,758
Gross Carrying Amount - Land				2,333
Gross Carrying Amount - Buildings & Improvements				19,917
Gross Carrying Amount - Total	22,250			22,250
Accumulated Depreciation & Amortization	$ 7,041			7,041
Year Built	Jan. 1, 1987
Year Acquired	Jan. 1, 2001
Investment in real estate, gross [Roll Forward]
Ending balance	$ 22,250
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(7,041)
Operating Property | Coral Plaza
Encumbrances				25,831
Initial Cost - Land				4,028
Initial Cost - Buildings & Improvements				15,019
Costs Capitalized Subsequent to Acquisition - Improvements				18,426
Gross Carrying Amount - Land				5,366
Gross Carrying Amount - Buildings & Improvements				32,107
Gross Carrying Amount - Total	37,473			37,473
Accumulated Depreciation & Amortization	$ 11,236			11,236
Year Built	Jan. 1, 1981
Year Acquired	Jan. 1, 1998
Investment in real estate, gross [Roll Forward]
Ending balance	$ 37,473
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(11,236)
Operating Property | Cornerstone Plaza
Encumbrances				10,630
Initial Cost - Land				8,245
Initial Cost - Buildings & Improvements				80,633
Costs Capitalized Subsequent to Acquisition - Improvements				6,231
Gross Carrying Amount - Land				8,263
Gross Carrying Amount - Buildings & Improvements				86,846
Gross Carrying Amount - Total	95,109			95,109
Accumulated Depreciation & Amortization	$ 26,906			26,906
Year Built	Jan. 1, 1986
Year Acquired	Jan. 1, 2007
Investment in real estate, gross [Roll Forward]
Ending balance	$ 95,109
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(26,906)
Operating Property | Encino Gateway
Encumbrances				0
Initial Cost - Land				8,475
Initial Cost - Buildings & Improvements				48,525
Costs Capitalized Subsequent to Acquisition - Improvements				55,755
Gross Carrying Amount - Land				15,653
Gross Carrying Amount - Buildings & Improvements				97,102
Gross Carrying Amount - Total	112,755			112,755
Accumulated Depreciation & Amortization	$ 33,083			33,083
Year Built	Jan. 1, 1974
Year Renovated	Jan. 1, 1998
Year Acquired	Jan. 1, 2000
Investment in real estate, gross [Roll Forward]
Ending balance	$ 112,755
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(33,083)
Operating Property | Encino Plaza
Encumbrances				0
Initial Cost - Land				5,293
Initial Cost - Buildings & Improvements				23,125
Costs Capitalized Subsequent to Acquisition - Improvements				48,919
Gross Carrying Amount - Land				6,165
Gross Carrying Amount - Buildings & Improvements				71,172
Gross Carrying Amount - Total	77,337			77,337
Accumulated Depreciation & Amortization	$ 25,121			25,121
Year Built	Jan. 1, 1971
Year Renovated	Jan. 1, 1992
Year Acquired	Jan. 1, 2000
Investment in real estate, gross [Roll Forward]
Ending balance	$ 77,337
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(25,121)
Operating Property | Encino Terrace
Encumbrances				91,133
Initial Cost - Land				12,535
Initial Cost - Buildings & Improvements				59,554
Costs Capitalized Subsequent to Acquisition - Improvements				96,475
Gross Carrying Amount - Land				15,533
Gross Carrying Amount - Buildings & Improvements				153,031
Gross Carrying Amount - Total	168,564			168,564
Accumulated Depreciation & Amortization	$ 51,989			51,989
Year Built	Jan. 1, 1986
Year Acquired	Jan. 1, 1999
Investment in real estate, gross [Roll Forward]
Ending balance	$ 168,564
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(51,989)
Operating Property | Executive Tower
Encumbrances				15,098
Initial Cost - Land				6,660
Initial Cost - Buildings & Improvements				32,045
Costs Capitalized Subsequent to Acquisition - Improvements				60,003
Gross Carrying Amount - Land				9,471
Gross Carrying Amount - Buildings & Improvements				89,237
Gross Carrying Amount - Total	98,708			98,708
Accumulated Depreciation & Amortization	$ 32,313			32,313
Year Built	Jan. 1, 1989
Year Acquired	Jan. 1, 1995
Investment in real estate, gross [Roll Forward]
Ending balance	$ 98,708
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(32,313)
Operating Property | First Financial Plaza
Encumbrances				54,084
Initial Cost - Land				12,092
Initial Cost - Buildings & Improvements				81,104
Costs Capitalized Subsequent to Acquisition - Improvements				3,655
Gross Carrying Amount - Land				12,092
Gross Carrying Amount - Buildings & Improvements				84,759
Gross Carrying Amount - Total	96,851			96,851
Accumulated Depreciation & Amortization	$ 10,691			10,691
Year Built	Jan. 1, 1986
Year Acquired	Jan. 1, 2015
Investment in real estate, gross [Roll Forward]
Ending balance	$ 96,851
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(10,691)
Operating Property | Gateway Los Angeles
Encumbrances				46,785
Initial Cost - Land				2,376
Initial Cost - Buildings & Improvements				15,302
Costs Capitalized Subsequent to Acquisition - Improvements				48,207
Gross Carrying Amount - Land				5,119
Gross Carrying Amount - Buildings & Improvements				60,766
Gross Carrying Amount - Total	65,885			65,885
Accumulated Depreciation & Amortization	$ 21,250			21,250
Year Built	Jan. 1, 1987
Year Acquired	Jan. 1, 1994
Investment in real estate, gross [Roll Forward]
Ending balance	$ 65,885
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(21,250)
Operating Property | Harbor Court
Encumbrances				30,992
Initial Cost - Land				51
Initial Cost - Buildings & Improvements				41,001
Costs Capitalized Subsequent to Acquisition - Improvements				47,131
Gross Carrying Amount - Land				12,060
Gross Carrying Amount - Buildings & Improvements				76,123
Gross Carrying Amount - Total	88,183			88,183
Accumulated Depreciation & Amortization	$ 22,257			22,257
Year Built	Jan. 1, 1994
Year Acquired	Jan. 1, 2004
Investment in real estate, gross [Roll Forward]
Ending balance	$ 88,183
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(22,257)
Operating Property | Honolulu Club
Encumbrances				0
Initial Cost - Land				1,863
Initial Cost - Buildings & Improvements				16,766
Costs Capitalized Subsequent to Acquisition - Improvements				5,766
Gross Carrying Amount - Land				1,863
Gross Carrying Amount - Buildings & Improvements				22,532
Gross Carrying Amount - Total	24,395			24,395
Accumulated Depreciation & Amortization	$ 8,147			8,147
Year Built	Jan. 1, 1980
Year Acquired	Jan. 1, 2008
Investment in real estate, gross [Roll Forward]
Ending balance	$ 24,395
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(8,147)
Operating Property | Landmark II
Encumbrances				0
Initial Cost - Land				6,086
Initial Cost - Buildings & Improvements				109,259
Costs Capitalized Subsequent to Acquisition - Improvements				66,476
Gross Carrying Amount - Land				13,070
Gross Carrying Amount - Buildings & Improvements				168,751
Gross Carrying Amount - Total	181,821			181,821
Accumulated Depreciation & Amortization	$ 56,261			56,261
Year Built	Jan. 1, 1989
Year Acquired	Jan. 1, 1997
Investment in real estate, gross [Roll Forward]
Ending balance	$ 181,821
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(56,261)
Operating Property | Lincoln Wilshire
Encumbrances				38,021
Initial Cost - Land				3,833
Initial Cost - Buildings & Improvements				12,484
Costs Capitalized Subsequent to Acquisition - Improvements				23,012
Gross Carrying Amount - Land				7,475
Gross Carrying Amount - Buildings & Improvements				31,854
Gross Carrying Amount - Total	39,329			39,329
Accumulated Depreciation & Amortization	$ 10,872			10,872
Year Built	Jan. 1, 1996
Year Acquired	Jan. 1, 2000
Investment in real estate, gross [Roll Forward]
Ending balance	$ 39,329
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(10,872)
Operating Property | MB Plaza
Encumbrances				32,090
Initial Cost - Land				4,533
Initial Cost - Buildings & Improvements				22,024
Costs Capitalized Subsequent to Acquisition - Improvements				32,047
Gross Carrying Amount - Land				7,503
Gross Carrying Amount - Buildings & Improvements				51,101
Gross Carrying Amount - Total	58,604			58,604
Accumulated Depreciation & Amortization	$ 16,949			16,949
Year Built	Jan. 1, 1971
Year Renovated	Jan. 1, 1996
Year Acquired	Jan. 1, 1998
Investment in real estate, gross [Roll Forward]
Ending balance	$ 58,604
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(16,949)
Operating Property | Olympic Center
Encumbrances				41,313
Initial Cost - Land				5,473
Initial Cost - Buildings & Improvements				22,850
Costs Capitalized Subsequent to Acquisition - Improvements				32,894
Gross Carrying Amount - Land				8,247
Gross Carrying Amount - Buildings & Improvements				52,970
Gross Carrying Amount - Total	61,217			61,217
Accumulated Depreciation & Amortization	$ 17,828			17,828
Year Built	Jan. 1, 1985
Year Renovated	Jan. 1, 1996
Year Acquired	Jan. 1, 1997
Investment in real estate, gross [Roll Forward]
Ending balance	$ 61,217
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(17,828)
Operating Property | One Westwood
Encumbrances				15,994
Initial Cost - Land				10,350
Initial Cost - Buildings & Improvements				29,784
Costs Capitalized Subsequent to Acquisition - Improvements				62,621
Gross Carrying Amount - Land				9,194
Gross Carrying Amount - Buildings & Improvements				93,561
Gross Carrying Amount - Total	102,755			102,755
Accumulated Depreciation & Amortization	$ 31,359			31,359
Year Built	Jan. 1, 1987
Year Renovated	Jan. 1, 2004
Year Acquired	Jan. 1, 1999
Investment in real estate, gross [Roll Forward]
Ending balance	$ 102,755
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(31,359)
Operating Property | Palisades Promenade
Encumbrances				0
Initial Cost - Land				5,253
Initial Cost - Buildings & Improvements				15,547
Costs Capitalized Subsequent to Acquisition - Improvements				54,537
Gross Carrying Amount - Land				9,664
Gross Carrying Amount - Buildings & Improvements				65,673
Gross Carrying Amount - Total	75,337			75,337
Accumulated Depreciation & Amortization	$ 21,362			21,362
Year Built	Jan. 1, 1990
Year Acquired	Jan. 1, 1995
Investment in real estate, gross [Roll Forward]
Ending balance	$ 75,337
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(21,362)
Operating Property | Saltair San Vicente
Encumbrances				21,269
Initial Cost - Land				5,075
Initial Cost - Buildings & Improvements				6,946
Costs Capitalized Subsequent to Acquisition - Improvements				16,813
Gross Carrying Amount - Land				7,557
Gross Carrying Amount - Buildings & Improvements				21,277
Gross Carrying Amount - Total	28,834			28,834
Accumulated Depreciation & Amortization	$ 7,643			7,643
Year Built	Jan. 1, 1964
Year Renovated	Jan. 1, 1992
Year Acquired	Jan. 1, 1997
Investment in real estate, gross [Roll Forward]
Ending balance	$ 28,834
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(7,643)
Operating Property | San Vicente Plaza
Encumbrances				0
Initial Cost - Land				7,055
Initial Cost - Buildings & Improvements				12,035
Costs Capitalized Subsequent to Acquisition - Improvements				51
Gross Carrying Amount - Land				7,055
Gross Carrying Amount - Buildings & Improvements				12,086
Gross Carrying Amount - Total	19,141			19,141
Accumulated Depreciation & Amortization	$ 4,621			4,621
Year Built	Jan. 1, 1985
Year Acquired	Jan. 1, 2006
Investment in real estate, gross [Roll Forward]
Ending balance	$ 19,141
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(4,621)
Operating Property | Santa Monica Square
Encumbrances				9,169
Initial Cost - Land				5,366
Initial Cost - Buildings & Improvements				18,025
Costs Capitalized Subsequent to Acquisition - Improvements				21,310
Gross Carrying Amount - Land				6,863
Gross Carrying Amount - Buildings & Improvements				37,838
Gross Carrying Amount - Total	44,701			44,701
Accumulated Depreciation & Amortization	$ 13,611			13,611
Year Built	Jan. 1, 1983
Year Renovated	Jan. 1, 2004
Year Acquired	Jan. 1, 2001
Investment in real estate, gross [Roll Forward]
Ending balance	$ 44,701
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(13,611)
Operating Property | Second Street Plaza
Encumbrances				49,505
Initial Cost - Land				4,377
Initial Cost - Buildings & Improvements				15,277
Costs Capitalized Subsequent to Acquisition - Improvements				35,680
Gross Carrying Amount - Land				7,421
Gross Carrying Amount - Buildings & Improvements				47,913
Gross Carrying Amount - Total	55,334			55,334
Accumulated Depreciation & Amortization	$ 16,450			16,450
Year Built	Jan. 1, 1991
Year Acquired	Jan. 1, 1997
Investment in real estate, gross [Roll Forward]
Ending balance	$ 55,334
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(16,450)
Operating Property | Sherman Oaks Galleria
Encumbrances				300,000
Initial Cost - Land				33,213
Initial Cost - Buildings & Improvements				17,820
Costs Capitalized Subsequent to Acquisition - Improvements				402,194
Gross Carrying Amount - Land				48,328
Gross Carrying Amount - Buildings & Improvements				404,899
Gross Carrying Amount - Total	453,227			453,227
Accumulated Depreciation & Amortization	$ 139,046			139,046
Year Built	Jan. 1, 1981
Year Renovated	Jan. 1, 2002
Year Acquired	Jan. 1, 1997
Investment in real estate, gross [Roll Forward]
Ending balance	$ 453,227
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(139,046)
Operating Property | Studio Plaza
Encumbrances				0
Initial Cost - Land				9,347
Initial Cost - Buildings & Improvements				73,358
Costs Capitalized Subsequent to Acquisition - Improvements				139,850
Gross Carrying Amount - Land				15,015
Gross Carrying Amount - Buildings & Improvements				207,540
Gross Carrying Amount - Total	222,555			222,555
Accumulated Depreciation & Amortization	$ 79,664			79,664
Year Built	Jan. 1, 1988
Year Renovated	Jan. 1, 2004
Year Acquired	Jan. 1, 1995
Investment in real estate, gross [Roll Forward]
Ending balance	$ 222,555
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(79,664)
Operating Property | The Tower
Encumbrances				65,969
Initial Cost - Land				9,643
Initial Cost - Buildings & Improvements				160,602
Costs Capitalized Subsequent to Acquisition - Improvements				3,146
Gross Carrying Amount - Land				9,643
Gross Carrying Amount - Buildings & Improvements				163,748
Gross Carrying Amount - Total	173,391			173,391
Accumulated Depreciation & Amortization	$ 15,289			15,289
Year Built	Jan. 1, 1988
Year Renovated	Jan. 1, 1998
Year Acquired	Jan. 1, 2016
Investment in real estate, gross [Roll Forward]
Ending balance	$ 173,391
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(15,289)
Operating Property | The Trillium
Encumbrances				26,472
Initial Cost - Land				20,688
Initial Cost - Buildings & Improvements				143,263
Costs Capitalized Subsequent to Acquisition - Improvements				87,532
Gross Carrying Amount - Land				21,989
Gross Carrying Amount - Buildings & Improvements				229,494
Gross Carrying Amount - Total	251,483			251,483
Accumulated Depreciation & Amortization	$ 75,904			75,904
Year Built	Jan. 1, 1988
Year Acquired	Jan. 1, 2005
Investment in real estate, gross [Roll Forward]
Ending balance	$ 251,483
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(75,904)
Operating Property | Valley Executive Tower
Encumbrances				92,618
Initial Cost - Land				8,446
Initial Cost - Buildings & Improvements				67,672
Costs Capitalized Subsequent to Acquisition - Improvements				103,059
Gross Carrying Amount - Land				11,737
Gross Carrying Amount - Buildings & Improvements				167,440
Gross Carrying Amount - Total	179,177			179,177
Accumulated Depreciation & Amortization	$ 56,133			56,133
Year Built	Jan. 1, 1984
Year Acquired	Jan. 1, 1998
Investment in real estate, gross [Roll Forward]
Ending balance	$ 179,177
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(56,133)
Operating Property | Valley Office Plaza
Encumbrances				41,271
Initial Cost - Land				5,731
Initial Cost - Buildings & Improvements				24,329
Costs Capitalized Subsequent to Acquisition - Improvements				47,813
Gross Carrying Amount - Land				8,957
Gross Carrying Amount - Buildings & Improvements				68,916
Gross Carrying Amount - Total	77,873			77,873
Accumulated Depreciation & Amortization	$ 24,998			24,998
Year Built	Jan. 1, 1966
Year Renovated	Jan. 1, 2002
Year Acquired	Jan. 1, 1998
Investment in real estate, gross [Roll Forward]
Ending balance	$ 77,873
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(24,998)
Operating Property | Verona
Encumbrances				0
Initial Cost - Land				2,574
Initial Cost - Buildings & Improvements				7,111
Costs Capitalized Subsequent to Acquisition - Improvements				14,729
Gross Carrying Amount - Land				5,111
Gross Carrying Amount - Buildings & Improvements				19,303
Gross Carrying Amount - Total	24,414			24,414
Accumulated Depreciation & Amortization	$ 6,686			6,686
Year Built	Jan. 1, 1991
Year Acquired	Jan. 1, 1997
Investment in real estate, gross [Roll Forward]
Ending balance	$ 24,414
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(6,686)
Operating Property | Village on Canon
Encumbrances				58,337
Initial Cost - Land				5,933
Initial Cost - Buildings & Improvements				11,389
Costs Capitalized Subsequent to Acquisition - Improvements				49,556
Gross Carrying Amount - Land				13,303
Gross Carrying Amount - Buildings & Improvements				53,575
Gross Carrying Amount - Total	66,878			66,878
Accumulated Depreciation & Amortization	$ 17,903			17,903
Year Built	Jan. 1, 1989
Year Renovated	Jan. 1, 1995
Year Acquired	Jan. 1, 1994
Investment in real estate, gross [Roll Forward]
Ending balance	$ 66,878
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(17,903)
Operating Property | Warner Center Towers
Encumbrances				335,000
Initial Cost - Land				43,110
Initial Cost - Buildings & Improvements				292,147
Costs Capitalized Subsequent to Acquisition - Improvements				417,365
Gross Carrying Amount - Land				59,419
Gross Carrying Amount - Buildings & Improvements				693,203
Gross Carrying Amount - Total	752,622			752,622
Accumulated Depreciation & Amortization	$ 233,979			233,979
Year Renovated	Jan. 1, 2004
Year Acquired	Jan. 1, 2002
Investment in real estate, gross [Roll Forward]
Ending balance	$ 752,622
Accumulated depreciation and amortization [Roll Forward]
Ending balance	$ (233,979)
Operating Property | Warner Center Towers | Minimum
Year Built	Jan. 1, 1982
Operating Property | Warner Center Towers | Maximum
Year Built	Jan. 1, 1993
Operating Property | Westside Towers
Encumbrances				107,386
Initial Cost - Land				8,506
Initial Cost - Buildings & Improvements				79,532
Costs Capitalized Subsequent to Acquisition - Improvements				80,586
Gross Carrying Amount - Land				14,568
Gross Carrying Amount - Buildings & Improvements				154,056
Gross Carrying Amount - Total	$ 168,624			168,624
Accumulated Depreciation & Amortization	$ 51,893			51,893
Year Built	Jan. 1, 1985
Year Acquired	Jan. 1, 1998
Investment in real estate, gross [Roll Forward]
Ending balance	$ 168,624
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(51,893)
Operating Property | Westwood Center
Encumbrances				113,344
Initial Cost - Land				9,512
Initial Cost - Buildings & Improvements				259,341
Costs Capitalized Subsequent to Acquisition - Improvements				9,508
Gross Carrying Amount - Land				9,513
Gross Carrying Amount - Buildings & Improvements				268,848
Gross Carrying Amount - Total	278,361			278,361
Accumulated Depreciation & Amortization	$ 24,383			24,383
Year Built	Jan. 1, 1965
Year Renovated	Jan. 1, 2000
Year Acquired	Jan. 1, 2016
Investment in real estate, gross [Roll Forward]
Ending balance	$ 278,361
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(24,383)
Operating Property | Westwood Place
Encumbrances				65,669
Initial Cost - Land				8,542
Initial Cost - Buildings & Improvements				44,419
Costs Capitalized Subsequent to Acquisition - Improvements				51,718
Gross Carrying Amount - Land				11,448
Gross Carrying Amount - Buildings & Improvements				93,231
Gross Carrying Amount - Total	104,679			104,679
Accumulated Depreciation & Amortization	$ 31,580			31,580
Year Built	Jan. 1, 1987
Year Acquired	Jan. 1, 1999
Investment in real estate, gross [Roll Forward]
Ending balance	$ 104,679
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(31,580)
Operating Property | 555 Barrington
Encumbrances				50,000
Initial Cost - Land				6,461
Initial Cost - Buildings & Improvements				27,639
Costs Capitalized Subsequent to Acquisition - Improvements				40,247
Gross Carrying Amount - Land				14,903
Gross Carrying Amount - Buildings & Improvements				59,444
Gross Carrying Amount - Total	74,347			74,347
Accumulated Depreciation & Amortization	$ 20,360			20,360
Year Built	Jan. 1, 1989
Year Acquired	Jan. 1, 1999
Investment in real estate, gross [Roll Forward]
Ending balance	$ 74,347
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(20,360)
Operating Property | Barrington Plaza
Encumbrances				210,000
Initial Cost - Land				28,568
Initial Cost - Buildings & Improvements				81,485
Costs Capitalized Subsequent to Acquisition - Improvements				153,090
Gross Carrying Amount - Land				58,208
Gross Carrying Amount - Buildings & Improvements				204,935
Gross Carrying Amount - Total	263,143			263,143
Accumulated Depreciation & Amortization	$ 69,633			69,633
Year Built	Jan. 1, 1963
Year Renovated	Jan. 1, 1998
Year Acquired	Jan. 1, 1998
Investment in real estate, gross [Roll Forward]
Ending balance	$ 263,143
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(69,633)
Operating Property | Barrington Kiowa
Encumbrances				11,345
Initial Cost - Land				5,720
Initial Cost - Buildings & Improvements				10,052
Costs Capitalized Subsequent to Acquisition - Improvements				580
Gross Carrying Amount - Land				5,720
Gross Carrying Amount - Buildings & Improvements				10,632
Gross Carrying Amount - Total	16,352			16,352
Accumulated Depreciation & Amortization	$ 3,656			3,656
Year Built	Jan. 1, 1974
Year Acquired	Jan. 1, 2006
Investment in real estate, gross [Roll Forward]
Ending balance	$ 16,352
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(3,656)
Operating Property | Barry
Encumbrances				9,000
Initial Cost - Land				6,426
Initial Cost - Buildings & Improvements				8,179
Costs Capitalized Subsequent to Acquisition - Improvements				460
Gross Carrying Amount - Land				6,426
Gross Carrying Amount - Buildings & Improvements				8,639
Gross Carrying Amount - Total	15,065			15,065
Accumulated Depreciation & Amortization	$ 3,086			3,086
Year Built	Jan. 1, 1973
Year Acquired	Jan. 1, 2006
Investment in real estate, gross [Roll Forward]
Ending balance	$ 15,065
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(3,086)
Operating Property | Kiowa
Encumbrances				4,535
Initial Cost - Land				2,605
Initial Cost - Buildings & Improvements				3,263
Costs Capitalized Subsequent to Acquisition - Improvements				372
Gross Carrying Amount - Land				2,605
Gross Carrying Amount - Buildings & Improvements				3,635
Gross Carrying Amount - Total	6,240			6,240
Accumulated Depreciation & Amortization	$ 1,274			1,274
Year Built	Jan. 1, 1972
Year Acquired	Jan. 1, 2006
Investment in real estate, gross [Roll Forward]
Ending balance	$ 6,240
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(1,274)
Operating Property | Moanalua Hillside Apartments
Encumbrances				145,000
Initial Cost - Land				22,252
Initial Cost - Buildings & Improvements				157,353
Costs Capitalized Subsequent to Acquisition - Improvements				40,280
Gross Carrying Amount - Land				32,826
Gross Carrying Amount - Buildings & Improvements				186,987
Gross Carrying Amount - Total	219,813			219,813
Accumulated Depreciation & Amortization	$ 41,344			41,344
Year Renovated	Jan. 1, 2004
Year Renovated	Jan. 1, 2018
Year Acquired	Jan. 1, 2005
Investment in real estate, gross [Roll Forward]
Ending balance	$ 219,813
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(41,344)
Operating Property | Pacific Plaza
Encumbrances				78,000
Initial Cost - Land				10,091
Initial Cost - Buildings & Improvements				16,159
Costs Capitalized Subsequent to Acquisition - Improvements				73,520
Gross Carrying Amount - Land				27,816
Gross Carrying Amount - Buildings & Improvements				71,954
Gross Carrying Amount - Total	99,770			99,770
Accumulated Depreciation & Amortization	$ 23,839			23,839
Year Built	Jan. 1, 1963
Year Renovated	Jan. 1, 1998
Year Acquired	Jan. 1, 1999
Investment in real estate, gross [Roll Forward]
Ending balance	$ 99,770
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(23,839)
Operating Property | The Shores
Encumbrances				212,000
Initial Cost - Land				20,809
Initial Cost - Buildings & Improvements				74,191
Costs Capitalized Subsequent to Acquisition - Improvements				198,955
Gross Carrying Amount - Land				60,555
Gross Carrying Amount - Buildings & Improvements				233,400
Gross Carrying Amount - Total	293,955			293,955
Accumulated Depreciation & Amortization	$ 76,519			76,519
Year Renovated	Jan. 1, 2002
Year Acquired	Jan. 1, 1999
Investment in real estate, gross [Roll Forward]
Ending balance	$ 293,955
Accumulated depreciation and amortization [Roll Forward]
Ending balance	$ (76,519)
Operating Property | The Shores | Minimum
Year Built	Jan. 1, 1965
Operating Property | The Shores | Maximum
Year Built	Jan. 1, 1967
Operating Property | Villas at Royal Kunia
Encumbrances				90,120
Initial Cost - Land				42,887
Initial Cost - Buildings & Improvements				71,376
Costs Capitalized Subsequent to Acquisition - Improvements				14,463
Gross Carrying Amount - Land				35,163
Gross Carrying Amount - Buildings & Improvements				93,563
Gross Carrying Amount - Total	$ 128,726			128,726
Accumulated Depreciation & Amortization	$ 36,210			36,210
Year Built	Jan. 1, 1990
Year Renovated	Jan. 1, 1995
Year Acquired	Jan. 1, 2006
Investment in real estate, gross [Roll Forward]
Ending balance	$ 128,726
Accumulated depreciation and amortization [Roll Forward]
Ending balance	(36,210)
Operating Property | Waena Apartments
Encumbrances				102,400
Initial Cost - Land				26,864
Initial Cost - Buildings & Improvements				119,272
Costs Capitalized Subsequent to Acquisition - Improvements				1,006
Gross Carrying Amount - Land				26,864
Gross Carrying Amount - Buildings & Improvements				120,279
Gross Carrying Amount - Total	147,143			147,143
Accumulated Depreciation & Amortization	$ 13,638			13,638
Year Renovated	Jan. 1, 2009
Year Acquired	Jan. 1, 2014
Investment in real estate, gross [Roll Forward]
Ending balance	$ 147,143
Accumulated depreciation and amortization [Roll Forward]
Ending balance	$ (13,638)
Operating Property | Waena Apartments | Minimum
Year Built	Jan. 1, 1970
Operating Property | Waena Apartments | Maximum
Year Renovated	Jan. 1, 2014
Operating Property | Owensmouth Warner
Encumbrances				5,887
Initial Cost - Land				23,848
Initial Cost - Buildings & Improvements				0
Costs Capitalized Subsequent to Acquisition - Improvements				0
Gross Carrying Amount - Land				23,848
Gross Carrying Amount - Buildings & Improvements				0
Gross Carrying Amount - Total	$ 23,848			23,848
Accumulated Depreciation & Amortization	$ 0			0
Year Acquired	Jan. 1, 2006
Investment in real estate, gross [Roll Forward]
Ending balance	$ 23,848
Accumulated depreciation and amortization [Roll Forward]
Ending balance	0
Property Under Development
Encumbrances				0
Initial Cost - Land				15,538
Initial Cost - Buildings & Improvements				0
Costs Capitalized Subsequent to Acquisition - Improvements				111,389
Gross Carrying Amount - Land				15,538
Gross Carrying Amount - Buildings & Improvements				114,215
Gross Carrying Amount - Total	129,753			129,753
Accumulated Depreciation & Amortization	0			0
Investment in real estate, gross [Roll Forward]
Ending balance	129,753
Accumulated depreciation and amortization [Roll Forward]
Ending balance	$ 0
Property Under Development | Moanalua Hillside Apartments | Minimum
Year Built	Jan. 1, 1968
Property Under Development | Landmark II Development
Encumbrances				0
Initial Cost - Land				13,070
Initial Cost - Buildings & Improvements				0
Costs Capitalized Subsequent to Acquisition - Improvements				34,766
Gross Carrying Amount - Land				13,070
Gross Carrying Amount - Buildings & Improvements				34,766
Gross Carrying Amount - Total	$ 47,836			47,836
Accumulated Depreciation & Amortization	0			0
Investment in real estate, gross [Roll Forward]
Ending balance	47,836
Accumulated depreciation and amortization [Roll Forward]
Ending balance	0
Property Under Development | Moanalua Hillside Apartments - Development
Encumbrances				0
Initial Cost - Land				2,468
Initial Cost - Buildings & Improvements				0
Costs Capitalized Subsequent to Acquisition - Improvements				76,045
Gross Carrying Amount - Land				2,468
Gross Carrying Amount - Buildings & Improvements				78,871
Gross Carrying Amount - Total	81,339			81,339
Accumulated Depreciation & Amortization	0			0
Investment in real estate, gross [Roll Forward]
Ending balance	81,339
Accumulated depreciation and amortization [Roll Forward]
Ending balance	0
Property Under Development | Other Developments
Encumbrances				0
Initial Cost - Land				0
Initial Cost - Buildings & Improvements				0
Costs Capitalized Subsequent to Acquisition - Improvements				578
Gross Carrying Amount - Land				0
Gross Carrying Amount - Buildings & Improvements				578
Gross Carrying Amount - Total	578			578
Accumulated Depreciation & Amortization	0			$ 0
Investment in real estate, gross [Roll Forward]
Ending balance	578
Accumulated depreciation and amortization [Roll Forward]
Ending balance	$ 0