Summary of Significant Accounting Policies | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of presentation — The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). Principles of consolidation —The accompanying consolidated financial statements include the accounts of the Company and the accounts of all subsidiaries in which the Company has a controlling interest and the accounts of variable interest entities (“VIEs”) in which the Company is deemed to be the primary beneficiary. A VIE is an entity in which either (i) the equity investors as a group, if any, lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance or (ii) the equity investment at risk is insufficient to finance that entity’s activities without additional subordinated financial support. The Company identifies the primary beneficiary of a VIE as the enterprise that has both of the following characteristics: (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance; and (ii) the obligation to absorb losses or receive benefits of the VIE that could potentially be significant to the entity. The Company consolidates its investment in a VIE when it determines that it is its primary beneficiary. The Company may change its original assessment of a VIE upon subsequent events such as the modification of contractual arrangements, or changes in influence and control over any entity, that affect the characteristics of the entity’s equity investments at risk and the disposition of all or a portion of an interest held by the primary beneficiary. The Company performs this analysis on an ongoing basis. All intercompany transactions and balances have been eliminated in consolidation. The accounts and operating results of the consolidated businesses acquired in the Formation Transactions have been included in the accompanying consolidated financial statements from the acquisition date forward. Use of estimates —The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Management evaluates its estimates on an ongoing basis and makes revisions to these estimates and related disclosures as experience develops or new information becomes known. Actual results could differ from those estimates. Concentration of risk —As of December 31, 2018 , the Company’s inventories and the Company’s unconsolidated entities’ inventories and properties are all located in California. The Company is subject to risks incidental to the ownership, development, and operation of commercial and residential real estate. These include, among others, the risks normally associated with changes in the general economic climate in the communities in which the Company operates, trends in the real estate industry, availability of land for development, changes in tax laws, interest rate levels, availability of financing, and potential liability under environmental and other laws. The Company’s credit risk relates primarily to cash deposits, cash equivalents and restricted cash and certificates of deposit. Cash deposit accounts at each institution are in excess of amounts insured by the Federal Deposit Insurance Corporation. The Company has not experienced any credit losses to date on its cash deposits, cash equivalents, restricted cash and certificates of deposit, and marketable securities—held to maturity. The Company’s risk management policies define parameters of acceptable market risk and strive to limit exposure to credit risk. Acquisitions —The Company accounts for businesses it acquires in accordance with Accounting Standards Codification (“ASC”) Topic 805, Business Combinations . This methodology requires that assets acquired and liabilities assumed be recorded at their respective fair values on the date of acquisition. Accordingly, the Company recognizes assets acquired and liabilities assumed in business combinations, including contingent assets and liabilities and non-controlling interest in the acquiree, based on the fair value estimates as of the date of acquisition. Any excess of the purchase consideration over the net fair value of tangible and identified intangible assets acquired less liabilities assumed is recorded as goodwill. The costs of business acquisitions are expensed as incurred. These costs may include fees for accounting, legal, professional consulting and valuation specialists. Purchase price allocations may be preliminary and, during the measurement period, not to exceed one year from the date of acquisition, changes in assumptions and estimates that result in adjustments to the fair value of assets acquired and liabilities assumed are recorded in the period the adjustments are determined. Contingent consideration assumed in a business combination is remeasured at fair value each reporting period until the contingency is resolved and any change in the fair value from either the passage of time or events occurring after the acquisition date, is recorded in results from operations. The estimated fair value of acquired assets and assumed liabilities requires significant judgments by management and are determined primarily by a discounted cash flow model. The determination of fair value using a discounted cash flow approach also requires discounting the estimated cash flows at a rate that the Company believes a market participant would determine to be commensurate with the inherent risks associated with the asset and related estimated cash flow streams. For acquisitions accounted for as an asset acquisition, the fair value of consideration transferred by the Company (including transaction costs) is allocated to all assets acquired and liabilities assumed on a relative fair value basis. Noncontrolling interests —The Company presents noncontrolling interests and classifies such interests within capital, but separate from the Company’s Class A and Class B members’ capital when the criteria for permanent equity classification has been met. Noncontrolling interests in the Company represent interests held by owners, excluding the Operating Company, of consolidated subsidiaries of the Operating Company, and investors in the Operating Company excluding the Holding Company. Net income or loss of the Operating Company is allocated to noncontrolling interests based on substantive profit sharing arrangements within the operating agreements, or if it is determined that a substantive profit sharing arrangement does not exist, allocation is based on relative ownership percentage of the Operating Company and the noncontrolling interests. Revenue recognition —Under ASC 606, Revenue From Contracts With Customers (“ASC 606”), which the Company adopted on January 1, 2018 (see –Recently Adopted Accounting Pronouncements ), revenues from land sales are recognized when the Company satisfies the performance obligation at a point in time, which typically occurs when the control of the land passes to its customers. Revenue is recognized in an amount that reflects the consideration the Company expects to be entitled to receive (i.e., the transaction price) in exchange for the transfer of land. The transaction price typically contains fixed and variable components in which the fixed consideration represents the stated purchase price for the land. Some of the Company’s residential homesite sale agreements contain a profit participation provision, a variable consideration, whereby the Company receives from homebuilders a portion of profit after the builder has received an agreed-upon margin. If the project profitability falls short of the participation threshold, no additional revenue is received. In most contracts, at the time of the land sale, the estimate of profit participation, if any, is constrained, as there are significant factors outside of the Company’s control that will impact whether participation thresholds will be met. In addition, some residential homesite sale agreements contain a provision requiring the homebuilder to pay a marketing fee per residence sold, as a percentage of the home sale price. Such fees are estimated as a variable consideration and the amount the Company expects to be entitled to receive is included in the transaction price. At the end of each reporting period, variable considerations are reassessed to ensure changes in circumstances or constraints are appropriately reflected in the estimated transaction price. Changes in estimates of variable components of transaction prices could result in cumulative catch-up adjustments to revenue. A contract asset or liability is recognized when the timing of the satisfaction of a performance obligation is different from the timing of the payments made by customers. Contract assets typically consist of estimates of contingent or variable consideration that has been included in the transaction price and recognized as revenue before the contingency is resolved and the contractual payment is due. Contract liabilities typically consist of payments received prior to satisfying the associated performance obligation. For example, a contract asset may be recorded at the closing of a land sale representing the estimated marketing fees included in the transaction price. However, the actual amount and timing of marketing fee payments is not known until the time a residence is sold. As marketing fee payments are collected from customers, the contract asset balance will be adjusted and reduced accordingly. Further, re-estimation of marketing fees at the end of each reporting period may result in an increase or decrease to the contract asset. Under ASC 605, Revenue Recognition (“ASC 605”) for periods prior to January 1, 2018, revenues from land sales were recognized when a significant down payment was received, the earnings process was complete, title passes, and the collectability of any receivables was reasonably assured. Revenues from profit participation were recognized when sufficient evidence existed that the homebuilding project had met the participation thresholds and the Company had collected the profit participation payment or was reasonably assured of collection. The Company deferred revenue on amounts collected in advance of meeting the recognition criteria. Lastly, marketing fees were recognized upon collection of receipts from the customer. Under ASC 606, revenues from management services are recognized as the customer consumes the benefits of the performance obligation satisfied over time. The transaction price pertaining to management services revenue is comprised of fixed and variable components whereby the fixed consideration typically represents a base management fee. The Company’s management agreements may contain incentive compensation fee provisions contingent on the performance of customers. In making estimates of incentive compensation, the Company expects to be entitled to receive in exchange for providing management services, significant assumptions and judgments are made in evaluating the factors that may determine the amount of consideration the Company will ultimately receive. In doing so, cash flow projections are typically utilized. These cash flows are significantly affected by estimates and assumptions related to market supply and demand, the local economy, projected pace of sales of homesites, pricing and price appreciation over the estimated selling period, the length of the estimated development and selling periods, remaining development, general and administrative costs, and other factors. Incentive compensation revenue from management services is recognized evenly over the expected contract term, as the performance obligation is satisfied. When changes in estimates and assumptions occur, the estimate of the amount of incentive compensation the Company expects to be entitled to receive may change, resulting in a cumulative catch-up being recorded in the period of the change. Similar to land sale revenues, a contract asset may be recognized associated with revenues generated from management services when there is a timing difference between the satisfaction of performance obligations and revenues becoming billable. Reassessment of the estimated transaction price at the end of each reporting period may increase or decrease contract assets. Contract asset balances are reduced when revenues from our customers become billable. Under ASC 605, the Company recorded management services revenues over the period in which the services were performed, fees were determinable, and collectability was reasonably assured. The Company recorded revenues from annual fees ratably over the contract period using the straight-line method and the Company recognized incentive compensation in the period in which the contingency was resolved and only to the extent other recognition conditions had been met. Included in operating properties revenues in the consolidated statements of operations are revenues from the Company’s agriculture and energy operations and its golf club operation, Tournament Players Club at Valencia Golf Course (sold in January 2018). Impairment of assets —Long-lived assets are reviewed for impairment when events or changes in circumstances indicate that their carrying value may not be recoverable. Impairment indicators for long-lived inventory assets include, but are not limited to, significant increases in horizontal development costs, significant decreases in the pace and pricing of home sales within the Company’s communities and surrounding areas and political and societal events that may negatively affect the local economy. For operating properties, impairment indicators may include significant increases in operating costs, decreased utilization, and continued net operating losses. If indicators of impairment exist, and the undiscounted cash flows expected to be generated by a long-lived asset are less than its carrying amount, an impairment charge is recorded to write down the carrying amount of such long-lived asset to its estimated fair value. The Company generally estimates the fair value of its long-lived assets using a discounted cash flow model or sales comparison approach of the underlying property or a combination thereof. The Company’s projected cash flows for each long-lived inventory asset are significantly affected by estimates and assumptions related to market supply and demand, the local economy, projected pace of sales of homesites, pricing and price appreciation over the estimated selling period, the length of the estimated development and selling periods, remaining development costs, and other factors. For operating properties, the Company’s projected cash flows also include estimates and assumptions about the use and eventual disposition of such properties, including utilization, capital expenditures, operating expenses, and the amount of proceeds to be realized upon eventual disposition of such properties. In determining these estimates and assumptions, the Company utilizes historical trends from past development projects of the Company in addition to internal and external market studies and trends, which generally include, but are not limited to, statistics on population demographics and unemployment rates. Using all available information, the Company calculates its best estimate of projected cash flows for each asset. While many of the estimates are calculated based on historical and projected trends, all estimates are subjective and change as market and economic conditions change. The determination of fair value also requires discounting the estimated cash flows at a rate the Company believes a market participant would determine to be commensurate with the inherent risks associated with the asset and related estimated cash flow streams. The discount rate used in determining each asset’s fair value generally depends on the asset’s projected life and development stage. Share-based payments — Share-based payments are recognized on a straight-line basis over the service period in the statement of operations based on their measurement date fair values. Forfeitures, if any, are accounted for in the period when they occur. Cash and cash equivalents —Included in cash and cash equivalents are short-term investments that have original maturity dates of three months or less. The carrying amount approximates fair value due to the short-term nature of these investments. Restricted cash and certificates of deposit —Restricted cash and certificates of deposit consist of cash, cash equivalents, and certificates of deposit held as collateral on open letters of credit related to development obligations or because of other legal obligations of the Company that require the restriction. Marketable securities —During the years ended December 31, 2017 and 2016, the Company made investments in marketable debt securities. The Company purchased each investment with the intent and ability to hold the investment until maturity and carried each investment at amortized cost. The amortized cost of such debt securities were adjusted for amortization of premiums and accretion of discounts, using the effective interest method or a method that approximates the effective interest method. Amortization and accretion of premiums and discounts are included in selling, general, and administrative costs and expenses in the accompanying consolidated statements of operations. The Company evaluates securities in unrealized loss positions for evidence of other-than-temporary impairment, considering, among other things, duration, severity, and financial condition of the issuer. No other-than-temporary impairments were identified during either year ended December 31, 2017 or 2016 , and the Company held no marketable securities at December 31, 2018 or 2017. Properties and equipment —Properties and equipment primarily relate to the Company’s operating properties’ businesses, are recorded at cost. Properties and equipment, other than land, are depreciated over their estimated useful lives using the straight-line method. At the time properties and equipment are disposed of, the asset and related accumulated depreciation, if any, are removed from the accounts, and any resulting gain or loss is credited or charged to earnings. The estimated useful life for land improvements and buildings is 10 to 40 years while the estimated useful life for furniture, fixtures, and equipment is two to 15 years. Held for sale classification —Assets to be disposed of together as a group in a single transaction and liabilities directly associated with those assets that will be transferred in the transaction are classified as held for sale on the Company’s consolidated balance sheet. Management evaluates certain criteria when determining held for sale classification including management’s authority to approve a disposal, management’s commitment to a plan to sell the disposal group, and the probability of completing the sale within one year. When initially classified as held for sale, assets and liabilities of assets held for sale are measured at the lower of carrying value or fair value less costs to sell. Included in the consolidated balance sheet at December 31, 2017 are assets and liabilities related to The Tournament Players Club at Valencia Golf Course that have been classified as held for sale. Assets held for sale of $4.5 million were comprised of property and equipment of $3.7 million , net of accumulated depreciation of $1.9 million , and other assets of $0.8 million . Liabilities of assets held for sale of $5.4 million consisted of club membership liabilities totaling $5.3 million and other liabilities of $0.1 million . In January 2018, The Tournament Players Club at Valencia Golf Course was sold for cash proceeds of $5.9 million , and the buyer’s assumption of certain liabilities, including certain membership related liabilities. Results of operations of The Tournament Players Club at Valencia Golf Course, prior to disposal, are included in the Company’s Newhall segment. The property was operated by the Company as an amenity to the Company’s fully developed Valencia community. There are no assets or liabilities held for sale at December 31, 2018. Investments in unconsolidated entities —For investments in entities that the Company does not control, but exercises significant influence, the Company uses the equity method of accounting. The Company’s judgment with regard to its level of influence or control of an entity involves consideration of various factors including the form of its ownership interest, its representation in the entity’s governance, its ability to participate in policy-making decisions, and the rights of other investors to participate in the decision-making process to replace the Company as manager or to liquidate the entity. Investments accounted for under the equity method of accounting are recorded at cost and adjusted for the Company’s share in the earnings (losses) of the venture and cash contributions and distributions. Any difference between the carrying amount of the equity method investment on the Company’s balance sheet and the underlying equity in net assets on the entity’s balance sheet results in a basis difference which is adjusted as the related underlying assets are depreciated, amortized, or sold and the liabilities are settled. The Company generally allocates income and loss from unconsolidated entities based on the venture’s distribution priorities, which may be different from its stated ownership percentage. The Company evaluates the recoverability of its investment in unconsolidated entities by first reviewing each investment for any indicators of impairment. If indicators are present, the Company estimates the fair value of the investment. If the carrying value of the investment is greater than the estimated fair value, management makes an assessment of whether the impairment is “temporary” or “other-than-temporary.” In making this assessment, management considers the following: (1) the length of time and the extent to which fair value has been less than cost, (2) the financial condition and near-term prospects of the entity, and (3) the Company’s intent and ability to retain its interest long enough for a recovery in market value. If management concludes that the impairment is “other-than-temporary,” the Company reduces the investment to its estimated fair value. No other-than-temporary impairments were identified during either the year ended December 31, 2018 , 2017 or 2016 . Inventories —Inventories primarily include land held for development and sale. Inventories are stated at cost, less reimbursements, unless the inventory within a community is determined to be impaired, in which case the impaired inventory would be written down to fair market value. Capitalized direct and indirect inventory costs include land, land in which the Company has the rights to receive in accordance with a disposition and development agreement (see Note 4), horizontal development costs, real estate taxes, and interest related to financing development and construction. During the years ended December 31, 2018 , 2017 and 2016 , the Company incurred interest expense, including amortization of debt issuance costs, all of which was capitalized into inventories, of $54.8 million , $9.4 million and $3.5 million , respectively. Horizontal development costs can be further broken down to costs incurred to entitle and permit the land for its intended use; costs incurred for infrastructure projects, such as schools, utilities, roads, and bridges; and site costs, such as grading and amenities, to bring the land to a saleable state. General and administrative costs related to project litigation are charged to expense when incurred. Costs that cannot be clearly associated with the acquisition, development, and construction of a real estate project and selling expenses are expensed as incurred. The Company expenses advertising costs as incurred, which were $2.0 million , $4.3 million and $3.5 million during the years ended December 31, 2018 , 2017 and 2016 , respectively. Certain public infrastructure project costs incurred by the Company are eligible for reimbursement, typically, from the proceeds of CFD bond debt, state and federal grants or property tax assessments. A portion of capitalized inventory costs is allocated to individual parcels within a project using the relative sales value method. Under the relative sales value method, each parcel in the project under development is allocated costs in proportion to the estimated overall sales prices of the project such that each parcel to be sold reflects the same gross profit margin. Since this method requires the Company to estimate the expected sales price for the entire project, the profit margin on subsequent parcels sold will be affected by both changes in the estimated total revenues, as well as any changes in the estimated total cost of the project. Intangible Asset —In connection with the Company’s acquisition of the Management Company (see Note 4), the Company acquired an intangible asset related to the contract value of the incentive compensation provisions of the Management Company’s development management agreement with the Great Park Venture. The Company records amortization expense over the contract period based on the pattern in which the Company expects to recognize the economic benefits from the incentive compensation. Receivables —The Company evaluates the carrying value of receivables, which includes receivables from related parties, at each reporting date to determine the need for an allowance for doubtful accounts. As of both December 31, 2018 and 2017 , the allowance for doubtful accounts was not significant. Fair value measurements —The Company follows guidance for fair value measurements and disclosures that emphasizes that fair value is a market-based measurement, not an entity-specific measurement. Therefore, a fair value measurement should be determined based on the assumptions that market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, the guidance establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity and the reporting entity’s own assumptions about market participant assumptions. Level 1 —Quoted prices for identical instruments in active markets Level 2 —Quoted prices for similar instruments in active markets or inputs, other than quoted prices, that are observable for the instrument either directly or indirectly Level 3 —Significant inputs to the valuation model are unobservable In instances where the determination of the fair value measurements is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. Offering Costs —Costs incurred by the Company, totaling $2.9 million , that were directly attributable to the IPO were deferred and charged against the gross proceeds of the offering as a reduction of members’ contributed capital. Income taxes —The Company accounts for income taxes in accordance with ASC Topic 740, Income Taxes (“ASC 740”), which requires an asset and liability approach for measuring deferred taxes based on temporary differences between the financial statements and tax bases of assets and liabilities existing at each balance sheet date using enacted tax rates for the years in which taxes are expected to be paid or recovered. The Holding Company has elected to be treated as a corporation for U.S. federal, state, and local tax purposes and determines the provision or benefit for income taxes on an interim basis using an estimate of its annual effective tax rate and the impact of specific events as they occur. The Company’s estimate of the Holding Company’s annual effective tax rate is subject to change based on changes in federal and state tax laws and regulations, the Holding Company’s ownership interest in the Operating Company and the Operating Company’s ownership in the San Francisco Venture, and the Company’s assessment of its deferred tax asset valuation allowance. Cumulative adjustments are made in interim periods in which the Company identifies a change in its estimate of the amount of future tax benefit when it is more likely than not that some portion of the deferred tax assets will not be realized. Among other things, the nature, frequency and severity of prior cumulative losses, forecasts of future taxable income, the duration of statutory carryforward periods, the Company’s utilization experience with operating loss and tax credit carryforwards and tax planning alternatives are considered and evaluated when assessing the need for a valuation allowance. Any increase or decrease in a valuation allowance could have a material adverse effect or beneficial effect on the Holding Company’s income tax provision and net income or loss in the period the determination is made. The Holding Company recognizes interest or penalties related to income tax matters in income tax expense. Miscellaneous other income —Miscellaneous other income consisted of the following (in thousands): Year Ended December 31, 2018 2017 2016 Gain on sale of golf club operating property $ 6,700 $ — $ — Gain on insurance claims 1,566 — — Net periodic pension benefit 307 93 57 Total miscellaneous other income $ 8,573 $ 93 $ 57 Recently issued accounting pronouncements —In June 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting (“ASU No. 2018-07”) which simplifies the accounting of share-based payments granted to nonemployees for goods and services. Under ASU No. 2018-07, most of the guidance on such payments to nonemployees would be aligned with the requirements for share-based payments granted to employees including the determination of the measurement date. ASU No. 2018-07 generally requires an entity to use a modified retrospective transition approach, with a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. The amendments in ASU No. 2018-07 are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company does not expect the adoption of ASU No. 2018-07 to have a material impact on its consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU No. 2016-02”). This ASU generally requires that lessees recognize right-of-use assets and lease liabilities on the balance sheet for operating and financing leases and also requires improved disclosures to help users of financial statements better understand the amount, timing and uncertainty of cash flows arising from leases. This update is effective for public entities in fiscal years beginning after December 15, 2018, including interim reporting periods within those fiscal years. The FASB has issued multiple clarifications and updates since ASU No. 2016-02 that include, but is not limited to, the ability to elect practical expedients upon transition. The Company will adopt ASU No. 2016-02 effective on January 1, 2019 on a modified retrospective basis. Consequently, comparative prior periods presented in financial statements after adoption will continue to be in accordance with current U.S. GAAP (Topic 840, Leases ). Upon transition, the Company will elect the package of practical expedients, whereby the Company will not reassess whether existing contracts contain leases, the lease classification of existing leases and initial direct costs associated with those leases. Additionally, the Company expects to exclude recognition of short term leases on the balance sheet and not separate lease and nonlease components for bot |