Summary of Significant Accounting Policies | Note 3. Summary of Significant Accounting Policies Use of Estimates Property, Plant and Equipment plant and equipment is stated at original cost, net of accumulated depreciation. The Company capitalizes costs incurred in bringing property, plant and equipment to an operational state, including all activities directly associated with the acquisition, construction, and installation of the related assets it owns. The Company capitalizes a portion of the interest costs it incurs for assets that require a period of time to get them ready for their intended use. The amount of interest that is capitalized is based on the average accumulated expenditures made during the period involved in bringing the assets comprising a network to an operational state at the Company’s weighted average interest rate during the respective accounting period. The Company also enters into leasing arrangements providing for the long‑term use of constructed fiber that is then integrated into the Company’s network infrastructure. For each lease that qualifies as a finance lease, the present value of the lease payments, which may include both periodic lease payments over the term of the lease as well as upfront payments to the lessor, is capitalized at the inception of the lease and included in property and equipment. As of December 31, 201 9 and 201 8 , the accumulated amortization of our finance lease assets was $ 24.3 million and $ million, respectively. Certain property, plant and equipment acquired as part of our spin-off from Windstream is depreciated using a group composite depreciation method. Under this method, when property is retired, the original cost, net of salvage value, is charged against accumulated depreciation and immediate gain or loss is recognized on the disposition of the property. For all other property, which includes amortization of finance lease assets, depreciation is computed using the straight-line method over the estimated useful life of the respective property. When the property is retired or otherwise disposed of, the related cost and accumulated depreciation are written-off, with the corresponding gain or loss reflected in operating results. Construction in progress includes direct materials and labor related to fixed assets during the construction period. Depreciation will begin once the construction period has ceased and the related asset has been placed into service, in which it will be depreciated over its useful life. Costs of maintenance and repairs to property, plant and equipment subject triple-net leasing arrangements are the responsibility of our tenant. Costs of maintenance and repairs to property, plant and equipment not subject to triple-net leasing arrangements are expensed as incurred. We acquire real property interests from third parties who own land where communications infrastructure assets are located and desire to monetize the underlying real property. These real property interests entitle us to receive rental payments from leases on our sites. The financial results of the acquired real property interests are included in the Leasing segment from the date of acquisition and were not material, individually or in the aggregate, to our results of operations. Real property interests are recorded in property, plant and equipment on our Consolidated Balance Sheet. Tenant Capital Improvements Impairment of Long-Lived Assets Asset Retirement Obligations Company records obligations to perform asset retirement activities, primarily including requirements to remove equipment from leased space or customer sites as required under the terms of the related lease and customer agreements. The fair value of the liability for asset retirement obligations, which represents the net present value of the estimated expected future cash outlay, is recognized in the period in which it is incurred and the fair value of the liability can reasonably be estimated. The liability accretes as a result of the passage of time and related accretion expense is recognized in the Consolidated Statements of Income. The associated asset retirement costs are capitalized as an additional carrying amount of the related long‑lived asset and depreciated on a straight-line basis over the asset’s useful life. As of December 31, 2019 and 2018, our aggregate carrying amount of asset retirement obligations totaled $9.5 million and $10.4 million, respectively. During the years ended December 31, 2019 and 2018, we incurred liabilities of $0.6 million and $0.1 million related to asset retirement obligations, respectively. During the year s ended December 31, 201 9 , 201 8 , and 201 7 , we recognized $ 1.3 million , $ 0.9 million , and $ 4.4 million of accretion expense related to asset retirement obligations , respectively . Cash and Cash Equivalents Derivative Instruments and Hedging Activities Derivatives and Hedging Note 7 Note 9 Exchangeable Notes and Related Transactions Debt – Debt with Conversion and Other Options Derivatives and Hedging See Note 11 . In connection with the offering of the Exchangeable Notes, Uniti Fiber entered into exchangeable note hedge transactions with respect to the Company’s common stock (the “Note Hedge Transactions”) with certain of the Initial Purchasers (as defined in Note 11) or their respective affiliates (collectively, the “Counterparties”). In addition, the Company entered into warrant transactions to sell to the Counterparties warrants (the “Warrants”) to acquire, subject to anti-dilution adjustments, up to approximately 27.8 million shares of the Company’s common stock in the aggregate at an exercise price of $16.42 per share. The warrant transactions may have a dilutive effect with respect to the Company’s common stock to the extent the market price per share of the Company’s common stock exceeds the strike price of the Warrants. While the Note Hedge Transactions and the Warrants meet the definition of a derivative in ASC 815-10-15-83, they each meet the equity scope exception specified in ASC 815-10-15-74(a); as such, the Warrants and the Notes Hedge Transactions are not accounted for as derivatives that must be remeasured each reporting period and instead, are recorded in stockholders’ deficit. See Note 9. Intangible Assets ntangible assets are presented in the financial statements at cost less accumulated amortization and are amortized using the straight-line method over their estimated useful lives with the exception of the customer list intangible assets related to our Consumer CLEC Business, which were brought over at carry-over basis at the time of Spin-Off, and are amortized using the sum-of-the-years’-digits method over their estimated useful lives Foreign Currency Translation Transaction Related and Other Costs to integrate an acquired business, including professional services, systems and data conversion, severance and retention bonuses payable to employees of an acquired business. In addition, other costs, such as costs incurred as a result of Windstream’s bankruptcy filing, costs associated with Windstream’s claims against us (see Note 15), and costs associated with the implementation of our new enterprise resource planning system are included within this line item on the Consolidated Statements of Income . Debt Issuance Costs Revenue Recognition As discussed in “Recently Issued Accounting Standards” in this Note 3, the Company adopted ASU No. 2016-02, Leases (“ASC 842”) on January 1, 2019. Prior to the adoption of ASC 842, the Company recognized leasing revenues on a straight-line basis over the applicable lease term when collectability is reasonably assured. Recognizing leasing income on a straight-line basis generally results in recognized revenues during the first half of the lease term in excess of cash amounts contractually due from our tenants, creating a straight-line rent receivable. We lease certain assets to Windstream under a triple-net lease, whereby Windstream is responsible for the costs related to operating the Distribution Systems, including property taxes, insurance and maintenance and repair costs. As a result, we do not record an obligation related to the payment of property taxes or insurance, as Windstream makes direct payments to the taxing authorities and insurance carriers, respectively. The Company adopted ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“Topic 606”) on January 1, 2018 (see Note 4). Prior to the adoption of Topic 606, t We evaluate the collectability of service receivables by considering a variety of factors. The Company typically does not require collateral. When the Company becomes aware of a specific customer’s inability to meet its financial obligations, the Company records a specific reserve for bad debt to reduce the related accounts receivable to the amount the Company reasonably believes is collectible. When appropriate, the Company also records reserves for bad debts for all other customers based on a variety of factors including the length of time the receivable is past due, the financial health of the customer, macroeconomic considerations and historical experience. If circumstances related to specific customers change, the Company adjusts its estimates of the recoverability of receivables as needed. At December 31, 2019 and 2018, the allowance recorded for service receivables was $2.7 million and $2.3 million, respectively. Consumer CLEC Business revenues are primarily derived from providing access to or usage of leased networks and facilities and are recognized over the period that the corresponding services are rendered to customers. Revenues derived from other telecommunications services, including broadband, long distance and enhanced service revenues are recognized monthly as services are provided. Sales of customer premise equipment and modems are recognized when products are delivered to and accepted by customers. Straight-Line Revenue Receivable line revenue receivable associated with the Master Lease in accordance with the transition provisions of ASC 842. At the date of adoption, due to uncertainties surrounding Windstream’s operations and liquidity, including uncertainties surrounding the outcome of Windstream’s pending litigation, we concluded that it was not probable that we would collect all future payments due to the Company over the initial term of the Master Lease . As a result, effective January 1, 2019, the Company recorded the Master Lease on a cash basis in accordance with ASC 842 and will not reflect a straight-line revenue receivable until a time at which collectability of all future rents is determined to be probable . At the adoption of ASC 842, we reflected the write off of the straight-line revenue balance as of January 1, 2019 as a $ 61.5 million adjustment to equity resulting from the change in accounting standard . Stock-Based Compensation Note 12 Income Taxes elected on our initial U.S. federal income tax return to be treated as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). To qualify as a REIT, we must distribute at least 90% of our annual REIT taxable income to shareholders, and meet certain organizational and operational requirements, including asset holding requirements. As a REIT, we will generally not be subject to U.S. federal income tax on income that we distribute as dividends to our shareholders. If we fail to qualify as a REIT in any taxable year, we will be subject to U.S. federal income tax, including any applicable alternative minimum tax for open taxable years through 2017, on our taxable income at regular corporate income tax rates, and we could not deduct dividends paid to our shareholders in computing taxable income. Any resulting corporate liability could be substantial and could materially and adversely affect our net income and net cash available for distribution to shareholders. Unless we were entitled to relief under certain Code provisions, we also would be disqualified from reelecting to be taxed as a REIT for the four taxable years following the year in which we failed to qualify as a REIT Subject to the temporary restriction imposed by the waiver and amendment to our Credit Agreement (see Note 11), our ability to make cash distributions to our shareholders in amounts exceeding 90% of our REIT taxable income, determined without regard to the dividends paid deduction and excluding any capital gains, generally will be restricted. As a result, we may be required to record a provision in our Consolidated Financial Statements for U.S. federal income taxes related to the activities of the REIT and its passthrough subsidiaries for any undistributed income. We are subject to the statutory requirements of the locations in which we conduct business, and state and local income taxes are accrued as deemed required in the best judgment of management based on analysis and interpretation of respective tax laws. We have elected to treat the subsidiaries through which we operate Uniti Fiber and Talk America, as well as certain portions of Uniti Towers, as taxable REIT subsidiaries (“TRSs”). TRSs enable us to engage in activities that result in income that does not constitute qualifying income for a REIT. Our TRSs are subject to U.S. federal, state and local corporate income taxes Deferred tax assets and liabilities are recognized under the asset and liability method for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax balances are adjusted to reflect tax rates based on currently enacted tax laws, which will be in effect in the years in which the temporary differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the results of operations in the period of the enactment date. A valuation allowance is recorded to reduce the carrying amounts of deferred tax assets unless it is more likely than not that such assets will be realized The Company is subject to restrictions on distributions to its shareholders based on our Credit Agreement as amended. The restrictions permit the Company to make the minimum required distribution to maintain its status as a REIT, which is limited to 90% of our REIT taxable income. The restrictions will remain in place until a plan of reorganization for Windstream has become effective and other conditions related to the Company’s net leverage ratio are satisfied. Management believes that the requirements for a reversion will occur before the end of calendar year 2020. Further, upon reversion, the Company expects to make one or more distributions to its shareholders to ensure that it has distributed at least 100 % of its 2020 REIT taxable income. Therefore, the Company believes that the REIT will not incur federal or state income tax related to its 2020 tax year (other than certain local income taxes) and thus no deferred income taxes related to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases at the REIT should be recorded as of December 31, 2019. We recognize the benefit of tax positions that are "more likely than not" to be sustained upon examination based on their technical merit. The benefit of a tax position is measured at the largest amount that has a greater than 50 percent likelihood of being realized upon ultimate settlement. If applicable, we will report tax-related penalties and interest expense as a component of income tax expense. We currently have unrecognized tax benefits of $1.7 million recorded in deferred incomes taxes on our Consolidated Balance Sheet. The Company will be subject to a federal corporate level tax on any gain recognized from the sale of assets occurring within a five year recognition period after the Spin-Off up to the amount of the built in gain that existed on April 24, 2015, which is based on the fair market value of the assets in excess of the Company’s tax basis as of such date. Business Combinations and Asset Acquisitions Business Combinations For acquisitions meeting the definition of a business combination, any excess of the purchase price paid by the Company over the amounts recognized for assets acquired and liabilities assumed is recorded as goodwill. ASC 805 also requires acquirers to, among other things, estimate the acquisition date fair value of any contingent consideration and recognize any subsequent changes in the fair value of contingent consideration in earnings. When provisional amounts are initially recorded, the Company continues to evaluate acquisitions for a period not to exceed one year after the applicable acquisition date of each transaction to determine whether any additional adjustments are needed to the allocation of the purchase price paid for the assets acquired and liabilities assumed. For acquisitions meeting the definition of an asset acquisition, the fair value of the consideration transferred, including transaction costs, is allocated to the assets acquired and liabilities assumed based on their relative fair values. There are significant judgments and estimates used in determining the fair values of the assets acquired and liabilities assumed, which include assumptions with respect to items such as replacement cost, land value, assemblage factor, discount rate, lease-up period, implied rents per strand mile, and useful life. No goodwill is recognized in an asset acquisition Noncontrolling Interest For transactions that result in changes to the Company's ownership interest in our operating partnership, the carrying amount of noncontrolling interests is adjusted to reflect such changes. The difference between the fair value of the consideration received or paid and the amount by which the noncontrolling interest is adjusted is reflected as an adjustment to additional paid-in capital on the C onsolidated B alance S heets. Goodwill Intangibles-Goodwill and Other 2% We estimate the fair value of our reporting units (which are our segments) using a combination of an income approach based on the present value of estimated future cash flows and a market approach based on market data of comparable businesses and acquisition multiples paid in recent transactions. We evaluate the appropriateness of each valuation methodology in determining the weighting applied to each methodology in the determination of the concluded fair value. If the carrying value of a reporting unit's net assets is less than its fair value, no indication of impairment exists. If the carrying amount of the reporting unit is greater than the fair value of the reporting unit, an impairment loss must be recognized for the excess and recorded in the Consolidated Statements of Income not to exceed the carrying value of goodwill. Inherent in our preparation of cash flow projections are significant assumptions and estimates derived from a review of our operating results and business plans, which includes expected revenue and expense growth rates, capital expenditure plans and cost of capital. In determining these assumptions, we consider our ability to execute on our plans, future economic conditions, interest rates and other market data. Many of the factors used in assessing fair value are outside the control of management, and these assumptions and estimates may change in future periods. As our concluded fair value of our Fiber Infrastructure reporting unit slightly exceeds carrying value, small changes in these assumptions or estimates could materially affect our cash flow projections, and therefore could affect the likelihood and amount of potential impairment in future periods. Potential events that could negatively impact these assumptions or estimates may include customer losses or poor execution of our business plans, which impact revenue growth, cost escalation impacting margin, the level of capital expenditures required to sustain our growth and market factors, including stock price fluctuations and increased rates, impacting our cost of capital. For example, if we were to experience a significant delay in our permitting process in the construction of our fiber networks, the timing of effected cash flows could impact long term growth rates and negatively impact the income approach, leading to potential impairment. As a result, should our expectations of average projected revenue growth percentage decrease by 4.0%, average projected EBITDA margin percentage decrease by 1.2% and/or average projected capital expenditures as a percentage of revenue increase by 3.9%, we may experience future impairment to goodwill (while other assumptions remain constant). Should we experience a deterioration in market factors such as stock prices or increased interest rates, a cost of capital increase in excess of 1.3% may result in future impairment. The market approach uses market data of comparable business and acquisition multiples paid in recent transactions to estimate fair value. Declines in acquisitions multiples of approximately 1.8% could affect the likelihood and amount of potential impairment. Earnings per Share Basic earnings per share includes only the weighted average number of common shares outstanding during the period. Dilutive earnings per share includes the weighted average number of common shares and the dilutive effect of restricted stock and performance-based awards outstanding during the period, when such awards are dilutive. See Note 1 3 . Concentration of Credit Risks are party to a Master Lease with Windstream from which substantially all of Uniti’s leasing revenues and operating cash flows are currently derived Because a substantial portion of our revenue and cash flows are derived from lease payments by Windstream pursuant to the Master Lease, there could be a material adverse impact on our consolidated results of operations, liquidity, financial condition and/or ability to pay dividends and service debt if Windstream were to default under the Master Lease or otherwise experiences operating or liquidity difficulties and becomes unable to generate sufficient cash to make payments to us. In recent years, Windstream has experienced annual declines in its total revenue, sales and cash flow, and has had its credit ratings downgraded by nationally recognized credit rating agencies multiple times over the past 12 months. In addition, Windstream has been involved in litigation with an entity who acquired certain Windstream debt securities and thereafter issued a notice of default as to such securities relating to our spin-off from Windstream. On December 7, 2017, the entity issued a notice of acceleration to Windstream claiming that the alleged default had matured into an “event of default” and that the principal amount, along with accrued interest, of such securities was due and payable immediately. Windstream challenged the matter in federal court and a trial was held, in July 2018. In response to the adverse outcome, on February 25, 2019, Windstream filed a voluntary petition for relief under Chapter 11 of the Bankruptcy Code in the U.S. Bankruptcy Court for the Southern District of New York. In bankruptcy, Windstream has the option to assume or reject the Master Lease. While we believe that the Master Lease is essential to Windstream’s operations, it is difficult to predict what could occur in a restructuring, and even a temporary disruption in payments to us may require us to fund certain expenses and obligations (e.g., real estate taxes, insurance and maintenance expenses) to preserve the value of our properties and avoid the imposition of liens on our properties and could impact our ability to fund other cash obligations, including dividends necessary to maintain REIT status, non-essential capital expenditures and, in an extreme case, our debt service obligations. See Note 2 . A rejection by Windstream of the Master Lease or its inability or unwillingness to meet its rent and other obligations under the Master Lease could materially adversely affect our consolidated results of operations, liquidity, and financial condition, including our ability to service debt, comply with debt covenants and pay dividends to our stockholders as required to maintain our status as a REIT. See Note 2. Windstream’s stock is quoted on the OTC Markets under the ticker symbol “WINMQ.” Windstream is subject to the periodic filing requirements of the Securities Exchange Act of 1934, as amended, but Windstream is not current in its reporting obligations. Windstream filings can be found at www.sec.gov. Windstream filings are not incorporated by reference in this Annual Report on Form 10-K. Recently Issued Accounting Standards Leases We determine if an arrangement is a lease at contract inception. A lease exists when a contract conveys to the customer the right to control the use of identified property, plant, or equipment for a period of time in exchange for consideration. The definition of a lease embodies two conditions: (i) there is an identified asset in the contract that is land or a depreciable asset (i.e., property, plant, and equipment), and (ii) the customer has the right to control the use of the identified asset. We enter into lease contracts including ground, towers, equipment, office, colocation and fiber lease arrangements, in which we are the lessee, and service contracts that may include embedded leases. Operating leases where we are the lessor are included in Leasing, Fiber Infrastructure and Tower revenues on our Consolidated Statements of Income. From time to time we may enter into direct financing lease arrangements that include (i) a lessee obligation to purchase the leased equipment at the end of the lease term, (ii) a bargain purchase option, (iii) a lease term having a duration that is for the major part of the remaining economic life of the leased equipment or (iv) provides for minimum lease payments with a present value amounting to substantially all of the fair value of the leased asset at the date of lease inception. ROU assets and lease liabilities related to operating leases where we are the lessee are included in other assets and accounts payable, accrued expenses and other liabilities, respectively, on our Consolidated Balance Sheets. The lease liabilities are initially and subsequently measured at the present value of the unpaid lease payments at the lease commencement date. ROU assets and lease liabilities related to finance leases where we are the lessee are included in property, plant and equipment, net and finance lease obligations, respectively, on our Consolidated Balance Sheets. The lease liabilities are initially measured in the same manner as operating leases and are subsequently measured at amortized cost using the effective interest method. ROU assets for finance leases are amortized on a straight-line basis over the remaining lease term. Key estimates and judgments include how we determined (i) the discount rate we use to discount the unpaid lease payments to present value, (ii) lease term and (iii) lease payments. i. ASC 842 requires a lessor to discount its unpaid lease payments using the interest rate implicit in the lease and a lessee to discount its unpaid lease payments using the interest rate implicit in the lease or, if that rate cannot be readily determined, its incremental borrowing rate. As we generally do not know the implicit rate for our leases where we are the lessee, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. Our incremental borrowing rate for a lease is the rate of interest we would have to pay on a collateralized basis to borrow an amount equal to the lease payments under similar terms. ii. The lease term for all of our leases includes the noncancellable period of the lease plus any additional periods covered by either a lessee option to extend (or not to terminate) the lease that the lessee is reasonably certain to exercise, or an option to extend (or not to terminate) the lease controlled by the lessor. iii. Lease payments included in the measurement of the lease asset or liability comprise the following: (i) fixed payments (including in-substance fixed payments), (ii) variable payments that depend on index or rate based on the index or rate at lease commencement, and (iii) the exercise price of a lessee option to purchase the underlying asset if the lessee is reasonably certain to exercise. For operating leases where we are the lessor, we continue recognizing the underlying asset and depreciating it over its estimated useful life. Lease income is recognized on a straight-line basis over the lease term. Leasing revenue is not recognized when collection of all contractual rents over the term of the agreement is not probable. When collection is not probable, the lessee is placed on non-accrual status and Leasing revenue is recognized when cash payments are received. Where we are the lessee, the ROU asset is initially measured at cost, which comprises the initial amount of the lease liability adjusted for lease payments made at or before the lease commencement date, plus any initial direct costs incurred less any lease incentives received. For operating leases, the ROU asset is subsequently measured throughout the lease term at the carrying amount of the lease liability, plus initial direct costs, plus (minus) any prepaid (accrued) lease payments, less the unamortized balance of lease incentives received. Lease expense for lease payments is recognized on a straight-line basis over the lease term. For finance leases, the ROU asset is subsequently amortized using the straight-line method from the lease commencement date to the earlier of the end of its useful life or the end of the lease term unless the lease transfers ownership of the underlying asset to us, or we are reasonably certain to exercise an option to purchase the underlying asset. In those cases, the ROU asset is amortized over the useful life of the underlying asset. Amortization of the ROU asset is recognized and presented separately from interest expense on the lease liability. Variable lease payments associated with our leases are recognized when the event, activity, or circumstance in the lease agreement on which those payments are assessed occurs. Variable lease payments are presented within Leasing, Fiber Infrastructure and Tower revenues and general and administrative expense and operating expense in our Consolidated Statements of Income in the same line item as revenue arising from fixed lease payments (operating leases where we are the lessor) and expense arising from fixed lease payments (operating leases where we are the lessee) or amortization of the ROU asset (finance leases), respectively. We monitor for events or changes in circumstances that require a reassessment of a lease. When a reassessment results in the remeasurement of a lease liability, a corresponding adjustment is made to the carrying amount of the corresponding ROU asset unless doing so would reduce the carrying amount of the ROU asset to an amount less than zero. In that case, the amount of the adjustment that would result in a negative ROU asset balance is recorded in general and administrative and operating expense in our Consolidated Statements of Income. We have lease agreements which include lease and nonlease components. For both leases where we are a lessor and leases where we are a lessee, we have elected to combine lease and nonlease components for all lease contracts. Nonlease components that are combined with lease components are primarily maintenance services related to the leased asset. Where we are the lessor, we determine whether the lease or nonlease component is the predominant component on a case-by-case basis. For all existing leases where we are the lessor, the practical expedient in ASC Topic 842 has been applied to all combined components. We have elected not to recognize ROU assets and lease liabilities for all short-term leases that have a lease term of 12 months or less. We recognize the lease payments associated with our short-term leases as an expense on a straight-line basis over the lease term. We have elected to exclude sales taxes from lease payments in arrangements where we are a lessor. We adopted ASC 842 using a modified retrospective transition approach as of the effective date as permitted by the amendments in ASU 2018-11, Leases (Topic 842): Target Improvements Land Easement Practical Expedient for Transition to Topic 842 Leases In connection with the adoption of ASC 842, we have recorded an adjustment to e |