| Summary of Significant Accounting Policies | Summary of Significant Accounting Policies Basis of Presentation and Principles of Consolidation As of September 30, 2019 , and December 31, 2018 , and for the three and nine months ended September 30, 2019 and 2018 , the financial statements presented are the consolidated financial statements of Rexford Industrial Realty, Inc. and its subsidiaries, including our Operating Partnership. All significant intercompany balances and transactions have been eliminated in the consolidated financial statements. Under consolidation guidance, we have determined that our Operating Partnership is a variable interest entity because the holders of limited partnership interests do not have substantive kick-out rights or participating rights. Furthermore, we are the primary beneficiary of the Operating Partnership because we have the obligation to absorb losses and the right to receive benefits from the Operating Partnership and the exclusive power to direct the activities of the Operating Partnership. As of September 30, 2019 and December 31, 2018 , the assets and liabilities of the Company and the Operating Partnership are substantially the same, as the Company does not have any significant assets other than its investment in the Operating Partnership. The accompanying unaudited interim financial statements have been prepared pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in the financial statements prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) may have been condensed or omitted pursuant to SEC rules and regulations, although we believe that the disclosures are adequate to make their presentation not misleading. The accompanying unaudited financial statements include, in our opinion, all adjustments, consisting of normal recurring adjustments, necessary to present fairly the financial information set forth therein. The results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 . The interim financial statements should be read in conjunction with the consolidated financial statements in our 2018 Annual Report on Form 10-K and the notes thereto. Any references to the number of properties and square footage are unaudited and outside the scope of our independent registered public accounting firm’s review of our financial statements in accordance with the standards of the United States Public Company Accounting Oversight Board. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Reclassifications In connection with the adoption of the new lease accounting standard on January 1, 2019, as further described below under “Adoption of New Accounting Pronouncements,” tenant reimbursements and other income related to leases have been reclassified to “Rental income” in the consolidated statements of operations for the three and nine months ended September 30, 2018 , to conform to the 2019 financial statement presentation. Cash and Cash Equivalents Cash and cash equivalents include all cash and liquid investments with an initial maturity of three months or less. The carrying amount approximates fair value due to the short-term maturity of these investments. Restricted Cash Restricted cash is generally comprised of cash proceeds from property sales that are being held by qualified intermediaries for purposes of facilitating tax-deferred like-kind exchanges under Section 1031 of the Internal Revenue Code (“1031 Exchange”). We include restricted cash with cash and cash equivalents in the consolidated statements of cash flows and provide a reconciliation between the balance sheet and the statement of cash flows provided that we have outstanding restricted cash balances. At September 30, 2019 and December 31, 2018 , we did not have restricted cash balances. Investments in Real Estate Acquisitions We account for acquisitions of properties under Accounting Standards Update (“ASU”) 2017-01, Business Combinations - Clarifying the Definition of a Business (“ASU 2017-01”), which provides a framework for determining whether transactions should be accounted for as acquisitions of assets or businesses and further revises the definition of a business. Our acquisitions of properties generally no longer meet the revised definition of a business and accordingly are accounted for as asset acquisitions. For asset acquisitions, we allocate the cost of the acquisition, which includes the purchase price and associated acquisition transaction costs, to the individual assets acquired and liabilities assumed on a relative fair value basis. These individual assets and liabilities typically include land, building and improvements, tenant improvements, intangible assets and liabilities related to above- and below-market leases, intangible assets related to in-place leases, and from time to time, assumed debt. As there is no measurement period concept for an asset acquisition, the allocated cost of the acquired assets is finalized in the period in which the acquisition occurs. We determine the fair value of the tangible assets of an acquired property by valuing the property as if it were vacant. This “as-if vacant” value is estimated using an income, or discounted cash flow, approach that relies upon Level 3 inputs, which are unobservable inputs based on the Company’s assumptions about the assumptions a market participant would use. These Level 3 inputs include discount rates, capitalization rates, market rents and comparable sales data for similar properties. Estimates of future cash flows are based on a number of factors including historical operating results, known and anticipated trends, and market and economic conditions. In determining the “as-if-vacant” value for the properties we acquired during the nine months ended September 30, 2019 , we used discount rates ranging from 5.75% to 7.75% and exit capitalization rates ranging from 4.50% to 7.25% . In determining the fair value of intangible lease assets or liabilities, we also consider Level 3 inputs. Acquired above- and below-market leases are valued based on the present value of the difference between prevailing market rates and the in-place rates measured over a period equal to the remaining term of the lease for above-market leases and the initial term plus the term of any below-market fixed rate renewal options for below-market leases, if applicable. The estimated fair value of acquired in-place at-market tenant leases are the estimated costs that would have been incurred to lease the property to the occupancy level of the property at the date of acquisition. We consider estimated costs such as the value associated with leasing commissions, legal and other costs, as well as the estimated period of time necessary to lease such a property to its occupancy level at the time of its acquisition. In determining the fair value of acquisitions completed during the nine months ended September 30, 2019 , we used an estimated average lease-up period ranging from six months to twelve months . The difference between the fair value and the face value of debt assumed, if any, in connection with an acquisition is recorded as a premium or discount and amortized to “interest expense” over the life of the debt assumed. The valuation of assumed liabilities are based on our estimate of the current market rates for similar liabilities in effect at the acquisition date. Capitalization of Costs We capitalize direct costs incurred in developing, renovating, rehabilitating and improving real estate assets as part of the investment basis. This includes certain general and administrative costs, including payroll, bonus and non-cash equity compensation of the personnel performing development, renovations and rehabilitation if such costs are identifiable to a specific activity to get the real estate asset ready for its intended use. During the development and construction periods of a project, we also capitalize interest, real estate taxes and insurance costs. We cease capitalization of costs upon substantial completion of the project, but no later than one year from cessation of major construction activity. If some portions of a project are substantially complete and ready for use and other portions have not yet reached that stage, we cease capitalizing costs on the completed portion of the project but continue to capitalize for the incomplete portion of the project. Costs incurred in making repairs and maintaining real estate assets are expensed as incurred. We capitalized interest costs of $1.3 million and $0.7 million during the three months ended September 30, 2019 and 2018 , respectively, and $3.0 million and $1.6 million during the nine months ended September 30, 2019 and 2018 , respectively. We capitalized real estate taxes and insurance costs aggregating $0.4 million and $0.2 million during the three months ended September 30, 2019 and 2018 , respectively and $1.0 million and $0.7 million during the nine months ended September 30, 2019 and 2018 respectively. We capitalized compensation costs for employees who provide construction services of $0.7 million and $0.6 million during the three months ended September 30, 2019 and 2018 , respectively, and $1.9 million and $1.6 million during the nine months ended September 30, 2019 and 2018 respectively. Depreciation and Amortization Real estate, including land, building and land improvements, tenant improvements, furniture, fixtures and equipment and intangible lease assets and liabilities are stated at historical cost less accumulated depreciation and amortization, unless circumstances indicate that the cost cannot be recovered, in which case, the carrying value of the property is reduced to estimated fair value as discussed below in our policy with regards to impairment of long-lived assets. We estimate the depreciable portion of our real estate assets and related useful lives in order to record depreciation expense. The values allocated to buildings, site improvements, in-place lease intangibles and tenant improvements are depreciated on a straight-line basis using an estimated remaining life of 10 - 30 years for buildings, 5 - 20 years for site improvements, and the shorter of the estimated useful life or respective lease term for in-place lease intangibles and tenant improvements. As discussed above in— Investments in Real Estate—Acquisitions , in connection with property acquisitions, we may acquire leases with rental rates above or below the market rental rates. Such differences are recorded as an acquired lease intangible asset or liability and amortized to “rental income” over the remaining term of the related leases. Our estimate of the useful life of our assets is evaluated upon acquisition and when circumstances indicate that a change in the useful life has occurred, which requires significant judgment regarding the economic obsolescence of tangible and intangible assets. Assets Held for Sale We classify a property as held for sale when all of the criteria set forth in the Accounting Standards Codification (“ASC”) Topic 360: Property, Plant and Equipment (“ASC 360”) have been met. The criteria are as follows: (i) management, having the authority to approve the action, commits to a plan to sell the property; (ii) the property is available for immediate sale in its present condition, subject only to terms that are usual and customary; (iii) an active program to locate a buyer and other actions required to complete the plan to sell have been initiated; (iv) the sale of the property is probable and is expected to be completed within one year; (v) the property is being actively marketed for sale at a price that is reasonable in relation to its current fair value; and (vi) actions necessary to complete the plan of sale indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn. At the time we classify a property as held for sale, we cease recording depreciation and amortization. A property classified as held for sale is measured and reported at the lower of its carrying amount or its estimated fair value less cost to sell. As of September 30, 2019 , our property located at 13914-13932 East Valley Boulevard was classified as held for sale. As of December 31, 2018, we did not have any properties classified as held for sale. See Note 11. Deferred Leasing Costs Subsequent to the adoption of the new lease accounting standard on January 1, 2019, we only capitalize incremental direct costs of a lease that would not have been incurred had the lease not been executed. As a result, deferred leasing costs on a go-forward basis, will generally only include third-party broker commissions. Prior to January 1, 2019, under prior lease accounting guidance, we capitalized incremental direct costs which included an allocation of internal compensation costs of employees who spent time on successful lease origination activities, in addition to third-party broker commissions. During the three and nine months ended September 30, 2018 , we capitalized compensation costs for these employees of $0.3 million and $0.7 million respectively. Impairment of Long-Lived Assets In accordance with the provisions of the Impairment or Disposal of Long-Lived Assets Subsections of ASC 360 , we assess the carrying values of our respective long-lived assets, including goodwill, whenever events or changes in circumstances indicate that the carrying amounts of these assets may not be fully recoverable. Recoverability of real estate assets is measured by comparison of the carrying amount of the asset to the estimated future undiscounted cash flows. In order to review real estate assets for recoverability, we consider current market conditions as well as our intent with respect to holding or disposing of the asset. The intent with regards to the underlying assets might change as market conditions and other factors change. Fair value is determined through various valuation techniques; including discounted cash flow models, applying a capitalization rate to estimated net operating income of a property, quoted market values and third-party appraisals, where considered necessary. The use of projected future cash flows is based on assumptions that are consistent with estimates of future expectations and the strategic plan used to manage our underlying business. If our analysis indicates that the carrying value of the real estate asset is not recoverable on an undiscounted cash flow basis, we will recognize an impairment charge for the amount by which the carrying value exceeds the current estimated fair value of the real estate property. Assumptions and estimates used in the recoverability analyses for future cash flows, discount rates and capitalization rates are complex and subjective. Changes in economic and operating conditions or our intent with respect to our investment that occur subsequent to our impairment analyses could impact these assumptions and result in future impairment of our real estate properties. Income Taxes We have elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”) commencing with our initial taxable year ended December 31, 2013. 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 the various other requirements imposed by the Code relating to matters such as operating results, asset holdings, distribution levels and diversity of stock ownership. Provided 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. If we fail to qualify as a REIT in any taxable year, and were 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. In addition, we are subject to taxation by various state and local jurisdictions, including those in which we transact business or reside. Our non-taxable REIT subsidiaries, including our Operating Partnership, are either partnerships or disregarded entities for federal income tax purposes. Under applicable federal and state income tax rules, the allocated share of net income or loss from disregarded entities and flow-through entities such as partnerships is reportable in the income tax returns of the respective equity holders. Accordingly, no income tax provision is included in the accompanying consolidated financial statements for the three and nine months ended September 30, 2019 and 2018 . We periodically evaluate our tax positions to determine whether it is more likely than not that such positions would be sustained upon examination by a tax authority for all open tax years, as defined by the statute of limitations, based on their technical merits. As of September 30, 2019 , and December 31, 2018 , we have not established a liability for uncertain tax positions. Derivative Instruments and Hedging Activities ASC Topic 815: Derivatives and Hedging (“ASC 815”), provides the disclosure requirements for derivatives and hedging activities with the intent to provide users of financial statements with an enhanced understanding of: (a) how and why an entity uses derivative instruments, (b) how the entity accounts for derivative instruments and related hedged items, and (c) how derivative instruments and related hedged items affect an entity’s financial position, financial performance, and cash flows. Further, qualitative disclosures are required that explain the Company’s objectives and strategies for using derivatives, as well as quantitative disclosures about the fair value of and gains and losses on derivative instruments, and disclosures about credit-risk-related contingent features in derivative instruments. As required by ASC 815, we record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, and whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. We may enter into derivative contracts that are intended to economically hedge certain risks, even though hedge accounting does not apply or we elect not to apply hedge accounting. See Note 7. Revenue Recognition Our primary sources of revenue are rental income, management, leasing and development services and gains on sale of real estate. Rental Income Total minimum annual lease payments are recognized in rental income on a straight-line basis over the term of the related lease, regardless of when payments are contractually due. Rental revenue recognition commences when the tenant takes possession or controls the physical use of the leased space. Lease termination fees, which are included in rental income, are recognized when the related leases are canceled and we have no continuing obligation to provide services to such former tenants. Our lease agreements with tenants generally contain provisions that require tenants to reimburse us for certain property expenses. Estimated reimbursements from tenants for real estate taxes, common area maintenance and other recoverable operating expenses are recognized as revenues in the period that the expenses are incurred. Subsequent to year-end, we perform final reconciliations on a lease-by-lease basis and bill or credit each tenant for any cumulative annual adjustments. Management, leasing and development services We provide property management services and leasing services to related party and third-party property owners, the customer, in exchange for fees and commissions. Property management services include performing property inspections, monitoring repairs and maintenance, negotiating vendor contracts, maintaining tenant relations and providing financial and accounting oversight. For these services, we earn monthly management fees, which are based on a fixed percentage of each managed property’s monthly tenant cash receipts. We have determined that control over the services is passed to the customer simultaneously as performance occurs. Accordingly, management fee revenue is earned as the services are provided to our customers. Leasing commissions are earned when we provide leasing services that result in an executed lease with a tenant. We have determined that control over the services is transferred to the customer upon execution of each lease agreement. We earn leasing commissions based on a fixed percentage of rental income generated for each executed lease agreement and there is no variable income component. Gain or Loss on Sale of Real Estate We account for dispositions of real estate properties, which are considered nonfinancial assets, in accordance with ASC 610-20: Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets and recognize a gain or loss on sale of real estate upon transferring control of the nonfinancial asset to the purchaser, which is generally satisfied at the time of sale. If we were to conduct a partial sale of real estate by transferring a controlling interest in a nonfinancial asset, while retaining a noncontrolling ownership interest, we would measure any noncontrolling interest received or retained at fair value, and recognize a full gain or loss. If we receive consideration before transferring control of a nonfinancial asset, we recognize a contract liability. If we transfer control of the asset before consideration is received, we recognize a contract asset. Valuation of Receivables We may be subject to tenant defaults and bankruptcies that could affect the collection of outstanding receivables related to our operating leases. In order to mitigate these risks, we perform credit reviews and analyses on prospective tenants before significant leases are executed and on existing tenants before properties are acquired. On a quarterly basis, we perform an assessment of the collectability of operating lease receivables on a tenant-by-tenant basis, which includes reviewing the age and nature of our receivables, the payment history and financial condition of the tenant, our assessment of the tenant’s ability to meet its lease obligations and the status of negotiations of any disputes with the tenant. Any changes in the collectability assessment for an operating lease is recognized as an adjustment, which can be a reduction or increase, to rental income in the consolidated statements of operations. As a result of our quarterly collectability assessments, we recognized $0.3 million and $0.5 million , for three months ended September 30, 2019 and 2018 , respectively, and $0.8 million and $0.8 million , for the nine months ended September 30, 2019 and 2018 , respectively, as a reduction of rental income in the consolidated statements of operations. Equity Based Compensation We account for equity-based compensation in accordance with ASC Topic 718: Compensation - Stock Compensation. Total compensation cost for all share-based awards is based on the estimated fair market value on the grant date. For share-based awards that vest based solely on a service condition, we recognize compensation cost on a straight-line basis over the total requisite service period for the entire award. For share-based awards that vest based on a market or performance condition, we recognize compensation cost on a straight-line basis over the requisite service period of each separately vesting tranche. Forfeitures are recognized in the period in which they occur. See Note 12. Equity Offering Costs Underwriting commissions and offering costs related to our common stock issuances have been reflected as a reduction of additional paid-in capital. Underwriting commissions and offering costs related to our preferred stock issuances have been reflected as a direct reduction of the preferred stock balance. Earnings Per Share We calculate earnings per share (“EPS”) in accordance with ASC 260 - Earnings Per Share (“ASC 260”). Under ASC 260, nonvested share-based payment awards that contain non-forfeitable rights to dividends are participating securities and, therefore, are included in the computation of basic EPS pursuant to the two-class method. The two-class method determines EPS for each class of common stock and participating securities according to dividends declared (or accumulated) and their respective participation rights in undistributed earnings. Basic EPS is calculated by dividing the net income (loss) attributable to common stockholders by the weighted average number of shares of common stock outstanding for the period. Diluted EPS is calculated by dividing the net income (loss) attributable to common stockholders by the weighted average number of shares of common stock outstanding determined for the basic EPS computation plus the effect of any dilutive securities. We include unvested shares of restricted stock and unvested LTIP units in the computation of diluted EPS by using the more dilutive of the two-class method or treasury stock method. We include unvested performance units as contingently issuable shares in the computation of diluted EPS once the market criteria are met, assuming that the end of the reporting period is the end of the contingency period. Any anti-dilutive securities are excluded from the diluted EPS calculation. See Note 13. Segment Reporting Management views the Company as a single reportable segment based on its method of internal reporting in addition to its allocation of capital and resources. Recently Issued Accounting Pronouncements Changes to GAAP are established by the Financial Accounting Standards Board (“FASB”) in the form of ASUs to the FASB’s Accounting Standards Codification. We consider the applicability and impact of all ASUs. Other than the ASUs discussed below, the FASB has not recently issued any other ASUs that we expect to be applicable and have a material impact on our financial statements. Adoption of New Accounting Pronouncements Derivatives On August 28, 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities (“ASU 2017-12”). ASU 2017-12 simplifies hedge accounting by eliminating the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. For cash flow hedges, ASU 2017-12 requires all changes in the fair value of the hedging instrument to be deferred in other comprehensive income and recognized in earnings at the same time that the hedged item affects earnings. ASU 2017-12 also eases certain documentation and assessment requirements and modifies the accounting for components excluded from the assessment of hedge effectiveness. ASU 2017-12 is effective for interim and annual reporting periods beginning after December 15, 2018, with early adoption permitted. Effective January 1, 2018, we early adopted ASU 2017-12 using the modified retrospective approach. We did not record a cumulative effect adjustment to eliminate ineffectiveness amounts as we did not have any ineffectiveness in our historical consolidated financial statements. In addition, certain provisions of ASU 2017-12 require modifications to existing presentation and disclosure requirements on a prospective basis. See Note 7 for disclosures relating to our derivative instruments. Leases On February 25, 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which sets out the principals for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. ASU 2016-02 was subsequently amended by the following updates: (i) ASU 2018-10, Leases: Codification Improvements to Topic 842, (ii) ASU 2018-11, Leases: Targeted Improvements, (iii) ASU 2018-20, Leases: Narrow-Scope Improvements for Lessors and (iv) ASU 2019-01, Leases: Codification Improvements (collectively referred to as “ASC 842”). ASC 842 supersedes prior lease accounting guidance contained in ASC Topic 840, Leases (“ASC 840”). On January 1, 2019, we adopted ASC 842 using the modified retrospective approach and elected to apply the provisions as of the date of adoption on a prospective basis. In making this election, we have continued to apply ASC 840 to comparative periods, including providing disclosures required by ASC 840 for these periods, and we recognized the effects of applying ASC 842 as a cumulative-effect adjustment to retained earnings as of January 1, 2019, as described below under “Lessor”. Upon adoption of ASC 842, we elected the “package of practical expedients” which allowed us to not reassess (a) whether expired or existing contracts as of January 1, 2019 are or contain leases, (b) the lease classification for any expired or existing leases as of January 1, 2019, and (c) the treatment of initial direct costs relating to any existing leases as of January 1, 2019. The package of practical expedients was made as a single election and was consistently applied to all leases that commenced before January 1, 2019. Lessor ASC 842 requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases, and operating leases. As we elected the package of practical expedients, our existing leases as of January 1, 2019, continue to be accounted for as operating leases. Upon adoption of ASC 842, we elected the practical expedient permitting lessors to elect by class of underlying asset to not separate non-lease components (for example, maintenance services, including common area maintenance) from associated lease components (the “non-separation practical expedient”) if both of the following criteria are met: (1) the timing and pattern of transfer of the lease and non-lease component(s) are the same and (2) the lease component would be classified as an operating lease if it were accounted for separately. If both criteria are met, the combined component is accounted for in accordance with ASC 842 if the lease component is the predominant component of the combined component; otherwise, the combined component is accounted for in accordance with the revenue recognition standard. We assessed the criteria above with respect to our operating leases and determined that they qualify for the non-separation practical expedient. As a result, we have accounted for and presented all rental income earned pursuant to operating leases, including tenant reimbursements, as a single line item “Rental income” in the consolidated statement of operations for the three and nine months ended September 30, 2019 . Prior to the adoption of ASC 842, we presented rental income, tenant reimbursements and other income related to leases separately in our consolidated statements of operations. For comparability, we have adjusted our comparative consolidated statement of operations for the three and nine months ended September 30, 2018 , to conform to the 2019 financial statement presentation. Under ASC 842, lessors are required to record revenues and expenses on a gross basis for lessor costs (which include real estate taxes) when these costs are reimbursed by a lessee. Conversely, lessors are required to record revenues and expenses on a net basis for lessor costs when t |
