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Summary of Significant Accounting Policies (Policies) | 12 Months Ended
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Dec. 31, 2019
Accounting Policies [Abstract] |
Principals of Consolidation | Principles of Consolidation The accompanying financial statements reflect our financial position, results of operations, comprehensive income (loss), equity and cash flows on a consolidated basis. All intercompany transactions and account balances have been eliminated.
Use of Estimates | Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires us to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities at the date of the financial statements and for the period then ended. On an ongoing basis, we evaluate the estimates used. We base our estimates on historical experience, actuarial estimates, current conditions and various other assumptions that we believe to be reasonable under the circumstances. These estimates form the basis for making judgments about the carrying values of assets and liabilities and are not readily apparent from other sources. Actual results may differ from these estimates.
Cash, Cash Equivalents and Restricted Cash | Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents include cash on hand and cash invested in highly liquid short-term securities, which have remaining maturities at the date of purchase of less than 90 days. Cash and cash equivalents are carried at cost, which approximates fair value.
Foreign Currency | Foreign Currency Local currencies are the functional currencies for our operations outside the United States, with the exception of certain foreign holding companies, whose functional currency is the United States dollar. In those instances where the local currency is the functional currency, assets and liabilities are translated at period-end exchange rates, and revenues and expenses are translated at average exchange rates for the applicable period. Resulting translation adjustments are reflected in the accumulated other comprehensive, net component of Iron Mountain Incorporated Stockholders' Equity.
Derivatives Instruments and Hedging Activities | Derivative Instruments and Hedging Activities Every derivative instrument is required to be recorded in the balance sheet as either an asset or a liability measured at its fair value. Periodically, we acquire derivative instruments that are intended to hedge either cash flows or values that are subject to foreign exchange or other market price risk and not for trading purposes. We have formally documented our hedging relationships, including identification of the hedging instruments and the hedged items, as well as our risk management objectives and strategies for undertaking each hedge transaction. Given the recurring nature of our revenues and the long-term nature of our asset base, we have the ability and the preference to use long-term, fixed interest rate debt to finance our business, thereby preserving our long-term returns on invested capital. We target approximately 75% of our debt portfolio to be fixed with respect to interest rates. Occasionally, we may use interest rate swaps as a tool to maintain our targeted level of fixed rate debt. In addition, we may use borrowings in foreign currencies, either obtained in the United States or by our foreign subsidiaries, to hedge foreign currency risk associated with our international investments. Sometimes we enter into currency swaps to temporarily hedge an overseas investment, such as a major acquisition, while we arrange permanent financing or to hedge our exposure due to foreign currency exchange movements related to our intercompany accounts with and between our foreign subsidiaries.
Property, Plant and Equipment | Minor maintenance costs are expensed as incurred. Major improvements which extend the life, increase the capacity or improve the safety or the efficiency of property owned are capitalized and depreciated. Major improvements to leased buildings are capitalized as leasehold improvements and depreciated. We capitalize interest expense during the active construction period of major capital projects. Capitalized interest is added to the cost of the underlying assets and is amortized over the useful lives of the assets.Property, Plant and Equipment Property, plant and equipment are stated at cost and depreciated using the straight-line method with the following useful lives (in years):
| Range
Buildings and building improvements | 5 to 40
Leasehold improvements | 5 to 10 or life of the lease (whichever is shorter)
Racking | 1 to 20 or life of the lease (whichever is shorter)
Warehouse equipment/vehicles | 1 to 10
Furniture and fixtures | 1 to 10
Computer hardware and software | 2 to 5
We develop various software applications for internal use. Computer software costs associated with internal use software are expensed as incurred until certain capitalization criteria are met. Third party consulting costs, as well as payroll and related costs for employees directly associated with, and devoting time to, the development of internal use computer software projects (to the extent time is spent directly on the project) are capitalized. During the years ended December 31, 2019, 2018 and 2017, we capitalized $34,650, $29,407 and $25,166 of costs, respectively, associated with the development of internal use computer software projects. Capitalization begins when the design stage of the application has been completed and it is probable that the project will be completed and used to perform the function intended. Capitalization ends when the asset is ready for its intended use. Depreciation begins when the software is placed in service. Computer software costs that are capitalized are periodically evaluated for impairment. Entities are required to record the fair value of a liability for an asset retirement obligation in the period in which it is incurred. Asset retirement obligations represent the costs to replace or remove tangible long-lived assets required by law, regulatory rule or contractual agreement. Our asset retirement obligations are primarily the result of requirements under our facility lease agreements which generally have "return to original condition" clauses which would require us to remove or restore items such as shred pits, vaults, demising walls and office build-outs, among others. The significant assumptions used in estimating our aggregate asset retirement obligations are the timing of removals, the probability of a requirement to perform, estimated cost and associated expected inflation rates that are consistent with historical rates and credit-adjusted risk-free rates that approximate our incremental borrowing rate.
Long-Lived Assets | Long-Lived Assets We review long-lived assets, including all finite-lived intangible assets, for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may not be recoverable. Recoverability of these assets is determined by comparing the sum of the forecasted undiscounted net cash flows of the operation to which the assets relate to their carrying amount. The operations are generally distinguished by the business segment and geographic region in which they operate. If it is determined that we are unable to recover the carrying amount of the assets, the long-lived assets are written down, on a pro rata basis, to fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets. Long-lived assets, including finite-lived intangible assets, are amortized over their useful lives. Annually, or more frequently if events or circumstances warrant, we assess whether a change in the lives over which long-lived assets, including finite-lived intangible assets, are amortized is necessary.
Goodwill and Other Intangible Assets | Goodwill and Other Indefinite-Lived Intangible Assets Goodwill and intangible assets with indefinite lives are not amortized but are reviewed annually for impairment or more frequently if impairment indicators arise. Other than goodwill, we currently have no intangible assets that have indefinite lives and which are not amortized. We have selected October 1 as our annual goodwill impairment review date. Reporting unit valuations have generally been determined using a combined approach based on the present value of future cash flows (the "Discounted Cash Flow Model") and market multiples (the "Market Approach"). The Discounted Cash Flow Model incorporates significant assumptions including future revenue growth rates, operating margins, discount rates and capital expenditures. The Market Approach requires us to make assumptions related to Adjusted EBITDA multiples. Changes in economic and operating conditions impacting these assumptions or changes in multiples could result in goodwill impairments in future periods. In conjunction with our annual goodwill impairment reviews, we reconcile the sum of the valuations of all of our reporting units to our market capitalization as of such dates.
Customer Relationships and Acquisitions Costs and Other Intangible Assets | Data Center Intangible Assets and Liabilities Finite-lived intangible assets associated with our Global Data Center Business consist of the following: Data Center In-Place Lease Intangible Assets and Data Center Tenant Relationship Intangible Assets Data Center In-Place Lease Intangible Assets (“Data Center In-Place Leases”) and Data Center Tenant Relationship Intangible Assets (“Data Center Tenant Relationships") are acquired through either business combinations or asset acquisitions in our Global Data Center Business. These intangible assets reflect the value associated with acquiring a data center operation with active tenants as of the date of acquisition. The value of Data Center In-Place Leases is determined based upon an estimate of the economic costs (such as lost revenues, tenant improvement costs, commissions, legal expenses and other costs to acquire new data center leases) avoided by acquiring a data center operation with active tenants that would have otherwise been incurred if the data center operation was purchased vacant. Data Center In-Place Leases are amortized over the weighted average remaining term of the acquired data center leases (weighted average of five years as of December 31, 2019) and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. The value of Data Center Tenant Relationships is determined based upon an estimate of the economic costs avoided upon lease renewal of the acquired tenants, based upon expectations of lease renewal. Data Center Tenant Relationships are amortized over the weighted average remaining anticipated life of the relationship with the acquired tenant (weighted average of eight years as of December 31, 2019) and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. Data Center In-Place Leases and Data Center Tenant Relationships are included in Customer relationships, customer inducements and data center lease-based intangibles in the accompanying Consolidated Balance Sheets. Data Center Above-Market and Below-Market In-Place Lease Intangible Assets Data Center Above-Market In-Place Lease Intangible Assets (“Data Center Above-Market Leases”) and Data Center Below-Market In-Place Lease Intangible Assets (“Data Center Below-Market Leases”) are acquired through either business combinations or asset acquisitions in our Global Data Center Business. We record Data Center Above-Market Leases and Data Center Below-Market Leases at the net present value of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management’s estimate of the fair market lease rates for each corresponding in-place lease. Data Center Above-Market Leases (weighted average of four years as of December 31, 2019) and Data Center Below-Market Leases (weighted average of nine years as of December 31, 2019) are amortized over the remaining non-cancellable term of the acquired in-place lease to storage revenue in the accompanying Consolidated Statements of Operations. Data Center Above-Market Leases are included in Customer relationships, customer inducements and data center lease-based intangibles in the accompanying Consolidated Balance Sheets. Data Center Below-Market Leases are included in Other long-term liabilities in the accompanying Consolidated Balance Sheets. Other finite-lived intangible assets, including trade names, noncompetition agreements and trademarks, are capitalized and amortized over a weighted average of four years as of December 31, 2019, and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. Customer Relationship Intangible Assets Customer relationship intangible assets, which are acquired through either business combinations or acquisitions of customer relationships, are amortized over periods ranging from 10 to 30 years (weighted average of 17 years at December 31, 2019) and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. The value of customer relationship intangible assets is calculated based upon estimates of their fair value.
Deferred Financing Costs | Deferred Financing Costs Deferred financing costs are amortized over the life of the related debt. If debt is retired early, the related unamortized deferred financing costs are written-off in the period the debt is retired to Other expense (income), net.
Revenues | Customer Inducements Upon the adoption of ASU 2014-09, free intake costs to transport boxes to one of our facilities, which include labor and transportation costs ("Free Move Costs"), are considered a Contract Fulfillment Cost (as defined in Note 2.l.) and, therefore, are now deferred and amortized and included in amortization expense over three years, consistent with the transfer of the performance obligation to the customer to which the asset relates. See Note 2.l. for information regarding the accounting for Free Move Costs, which are now a component of Intake Costs (as defined in Note 2.l.), following the adoption of ASU 2014-09. Payments that are made to a customer's current records management vendor in order to terminate the customer's existing contract with that vendor, or direct payments to a customer ("Permanent Withdrawal Fees"), are amortized over periods ranging from five to 15 years (weighted average of seven years as of December 31, 2019) and are included in storage and service revenue in the accompanying Consolidated Statements of Operations. Our accounting for Permanent Withdrawal Fees did not change as a result of the adoption of ASU 2014-09. Free Move Costs (prior to the adoption of ASU 2014-09) and Permanent Withdrawal Fees are collectively referred to as "Customer Inducements". If the customer terminates its relationship with us, the unamortized carrying value of the Customer Inducement intangible asset is charged to expense or revenue. However, in the event of such termination, we generally collect, and record as income, permanent removal fees that generally equal or exceed the amount of the unamortized Customer Inducement intangible asset. Revenues Our revenues consist of storage rental revenues as well as service revenues and are reflected net of sales and value-added taxes. Storage rental revenues, which are considered a key driver of financial performance for the storage and information management services industry, consist primarily of recurring periodic rental charges related to the storage of materials or data (generally on a per unit basis) that are typically retained by customers for many years, technology escrow services that protect and manage source code and revenues associated with our data center operations. Service revenues include charges for related service activities, the most significant of which include: (1) the handling of records, including the addition of new records, temporary removal of records from storage, refiling of removed records and courier operations, consisting primarily of the pickup and delivery of records upon customer request; (2) destruction services, consisting primarily of secure shredding of sensitive documents and the subsequent sale of shredded paper for recycling, the price of which can fluctuate from period to period, and customer termination and permanent removal fees; (3) other services, including the scanning, imaging and document conversion services of active and inactive records and project revenues; and (4) consulting services. In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09. ASU 2014-09 provides guidance for management to reassess revenue recognition as it relates to: (1) transfer of control, (2) variable consideration, (3) allocation of transaction price based on relative standalone selling price, (4) licenses, (5) time value of money, and (6) contract costs. We adopted ASU 2014-09 as of January 1, 2018 using the modified retrospective method for all of our customer contracts, whereby the cumulative effect of applying ASU 2014-09 is recognized at the date of initial application. At January 1, 2018, we recognized the cumulative effect of initially applying ASU 2014-09 as an adjustment to the opening balance of (Distributions in excess of earnings) Earnings in excess of distributions, resulting in a decrease of approximately $30,200 to stockholders' equity. The reduction of (Distribution in excess of earnings) Earnings in excess of distributions represents the net effect of (i) the write-off of Free Move Costs, net (which were capitalized and amortized prior to the adoption of ASU 2014-09) based upon the net book value of the Free Move Costs as of December 31, 2017, (ii) the recognition of certain Contract Fulfillment Costs, specifically Intake Costs (each as defined below) and commission assets, (iii) the recognition of deferred revenue associated with Intake Costs billed to our customers, and (iv) the deferred income tax impact of the aforementioned items. As we adopted ASU 2014-09 on a modified retrospective basis, the prior period consolidated financial statements were not restated to reflect the adoption of ASU 2014-09 and reflect our revenue policies in place at that time. Storage rental and service revenues are recognized in the month the respective storage rental or service is provided, and customers are generally billed on a monthly basis on contractually agreed-upon terms. Amounts related to future storage rental or prepaid service contracts for customers where storage rental fees or services are billed in advance are accounted for as deferred revenue and recognized ratably over the period the applicable storage rental or service is provided or performed. Revenues from the sales of products, which are included as a component of service revenues, are recognized when products are shipped and title has passed to the customer. Revenues from the sales of products, which represented less than 2% of consolidated revenue for the year ended December 31, 2019, have historically not been significant. The performance obligation is a series of distinct services (as determined for purposes of ASU 2014-09, a “series”) that have the same pattern of transfer to the customer that is satisfied over time. For those contracts that qualify as a series, we have a right to consideration from the customer in an amount that corresponds directly with the value of the underlying performance obligation transferred to the customer to date. This concept is known as "right to invoice" and we are applying the "right to invoice" practical expedient to all revenues, with the exception of storage revenues in our Global Data Center Business. For all of our businesses, with the exception of the storage component of our Global Data Center Business, each purchasing decision is fully in the control of the customer and, therefore, consideration beyond the current reporting period is variable and allocated to the specific period, which is consistent with the practical expedient described above. Our Global Data Center Business features storage rental provided to the customer at contractually specified rates over a fixed contractual period. The storage rental revenue related to the storage component of our Global Data Center Business is recognized on a straight-line basis over the contract term. The revenue related to the service component of our Global Data Center Business is recognized in the period the related services are provided. The costs associated with the initial movement of customer records into physical storage and certain commissions are considered costs to obtain or fulfill customer contracts (“Contract Fulfillment Costs”). The following describes each of these Contract Fulfillment Costs recognized under ASU 2014-09: Intake Costs (and associated deferred revenue) Upon the adoption of ASU 2014-09, all the costs of the initial intake of customer records into physical storage ("Intake Costs"), regardless of whether or not the services associated with such initial moves are billed to the customer or are provided to the customer at no charge, are deferred and amortized as a component of depreciation and amortization in our Consolidated Statements of Operations over three years, consistent with the transfer of the performance obligation to the customer to which the asset relates. Similarly, in instances where such Intake Costs are billed to the customer, the associated revenue will be deferred and recognized over the same three-year period. Commissions Upon the adoption of ASU 2014-09, certain commission payments that are directly associated with the fulfillment of long-term storage contracts are capitalized and amortized as a component of depreciation and amortization in our Consolidated Statements of Operations over three years, consistent with the transfer of the performance obligation to the customer to which the asset relates. Certain direct commission payments associated with contracts with a duration of one year or less are expensed as incurred under the practical expedient which allows an entity to expense as incurred an incremental cost of obtaining a contract if the amortization period of the asset that the entity otherwise would have recognized is one year or less.
Leases | Leases We lease facilities for certain warehouses, data centers and office space. We also have land leases, including those on which certain facilities are located. The majority of our leased facilities are classified as operating leases that, on average, have initial lease terms of five to 10 years, with one or more lease renewal options to extend the lease term. Our lease renewal option terms generally range from one to five years. The exercise of the lease renewal option is at our sole discretion and may contain fixed rent, fair market value based rent or Consumer Price Index rent escalation clauses. We include option periods in the lease term when our failure to renew the lease would result in an economic disincentive, thereby making it reasonably certain that we will renew the lease. We recognize straight line rental expense over the life of the lease and any fair market value or Consumer Price Index rent escalations are recognized as variable lease expense in the period in which the obligation is incurred. In addition, we lease certain vehicles and equipment. Vehicle and equipment leases typically have lease terms ranging from one to seven years. In February 2016, FASB issued ASU 2016-02 which requires lessees to recognize assets and liabilities on the balance sheet for the rights and the obligations created by all leases, both operating and financing (formerly referred to as capital leases under ASC 840). ASU 2016-02 requires certain qualitative and quantitative disclosures designed to give financial statement users information on the amount, timing, and uncertainty of cash flows arising from leases. We adopted ASU 2016-02 on January 1, 2019 on a modified retrospective basis under which we recognized and measured leases existing at, or entered into after, the beginning of the period of adoption. Therefore, we applied ASC 840 to all earlier comparative periods (prior to the adoption of ASU 2016-02), including disclosures, and recognized the effects of applying ASU 2016-02 as a cumulative-effect adjustment to (Distributions in excess of earnings) Earnings in excess of distributions as of January 1, 2019, the effective date of the standard. As such, our Consolidated Balance Sheet as of December 31, 2018 has not been restated to reflect the adoption of ASU 2016-02. Accordingly, the majority of the amount presented as deferred rent liabilities on our Consolidated Balance Sheet as of December 31, 2018 is now included in the calculation of operating lease right-of-use assets and any remaining amounts are now classified within other liability line items on our Consolidated Balance Sheet as of December 31, 2019. The transition guidance associated with ASU 2016-02 also permitted certain practical expedients. We elected the "package of 3" practical expedients permitted under the transition guidance which, among other things, allowed us to carry forward our historical lease classifications. We also adopted an accounting policy which provides that leases with an initial term of 12 months or less will not be included within the lease right-of-use assets and lease liabilities recognized on our Consolidated Balance Sheets after the adoption of ASU 2016-02. We will continue to recognize the lease payments for those leases with an initial term of 12 months or less in our Consolidated Statements of Operations on a straight-line basis over the lease term. The lease right-of-use assets and related lease liabilities are classified as either operating or financing. Lease right-of-use assets are calculated as the net present value of future payments plus any capitalized initial direct costs less any tenant improvements or lease incentives. Lease liabilities are calculated as the net present value of future payments. In calculating the present value of the lease payments, we will utilize the rate stated in the lease (in the limited circumstances when such rate is explicitly stated) or, if no rate is explicitly stated, we have elected to utilize a rate that reflects our securitized incremental borrowing rate by geography for the lease term. In July 2018, the FASB issued ASU No. 2018-11, Leases - Targeted Improvements ("ASU 2018-11"). ASU 2018-11 provides a practical expedient which allows lessees to account for nonlease components (which include common area maintenance, taxes, and insurance) with the related lease component. Any variable nonlease components are not included within the lease right-of-use asset and lease liability on our Consolidated Balance Sheets, and instead, are reflected as an expense in the period incurred. We have elected to take this practical expedient upon adoption of ASU 2016-02.
Stock-Based Compensation | Stock-Based Compensation We record stock-based compensation expense, utilizing the straight-line method, for the cost of stock options, restricted stock units ("RSUs"), performance units ("PUs") and shares of stock issued under our employee stock purchase plan ("ESPP") (together, "Employee Stock-Based Awards"). We offer an ESPP in which participation is available to substantially all United States and Canadian employees who meet certain service eligibility requirements. The ESPP provides a way for our eligible employees to become stockholders on favorable terms. The ESPP provides for the purchase of our common stock by eligible employees through successive offering periods. We have historically had two six-month offering periods per year, the first of which generally runs from June 1 through November 30 and the second of which generally runs from December 1 through May 31. During each offering period, participating employees accumulate after-tax payroll contributions, up to a maximum of 15% of their compensation, to pay the purchase price at the end of the offering. Participating employees may withdraw from an offering before the purchase date and obtain a refund of the amounts withheld as payroll deductions. At the end of the offering period, outstanding options under the ESPP are exercised, and each employee's accumulated contributions are used to purchase our common stock. The price for shares purchased under the ESPP is 95% of the fair market price at the end of the offering period, without a look-back feature. As a result, we do not recognize compensation expense for the ESPP shares purchased. Stock Options Under our various stock option plans, options are generally granted with exercise prices equal to the market price of the stock on the date of grant; however, in certain instances, options are granted at prices greater than the market price of the stock on the date of grant. The options we issue become exercisable ratably over a period of either (i) three years from the date of grant and have a contractual life of 10 years from the date of grant, unless the holder's employment is terminated sooner, or (ii) five years from the date of grant and have a contractual life of 10 years from the date of grant, unless the holder's employment is terminated sooner. Our non-employee directors are considered employees for purposes of our stock option plans and stock option reporting. Performance Units Under our various equity compensation plans, we may also make awards of PUs. For the majority of outstanding PUs, the number of PUs earned is determined based on our performance against predefined targets of revenue and return on invested capital ("ROIC") and, with PUs granted in 2018, Adjusted EBITDA (as defined in Note 9). The number of PUs earned may range from 0% to 200% of the initial award. The number of PUs earned is determined based on our actual performance as compared to the targets at the end of a three-year performance period. Certain PUs that we grant will be earned based on a market condition associated with the total return on our common stock in relation to either (i) a subset of the Standard & Poor's 500 Index (for certain PUs granted prior to 2017), or (ii) the MSCI United States REIT Index (for certain PUs granted in 2017 and thereafter), rather than the revenue, ROIC and Adjusted EBITDA targets noted above. The number of PUs earned based on this market condition may range from 0% to 200% of the initial award. All of our PUs will be settled in shares of our common stock and are subject to cliff vesting three years from the date of the original PU grant. As detailed above, PUs granted on or after February 20, 2019 are subject to the 2019 Retirement Criteria. PUs granted to recipients who meet the 2019 Retirement Criteria will continue to vest and be delivered in accordance with the original vesting schedule of the applicable PU award and remain subject to the same performance conditions. PUs granted prior to February 20, 2019 to employees who terminate their employment during the three-year performance period and on or after attaining age 55 and completing 10 years of qualifying service are eligible for pro-rated vesting, subject to the actual achievement against the predefined targets or a market condition as discussed above, based on the number of full years of service completed following the grant date (but delivery of the shares remains deferred). As a result, PUs are generally expensed over the three-year performance period. All PUs accrue dividend equivalents associated with the underlying stock as we declare dividends. Dividends will generally be paid to holders of PUs in cash upon the settlement date of the associated PU and will be forfeited if the PU does not vest. We forecast the likelihood of achieving the predefined revenue, ROIC and Adjusted EBITDA targets for our PUs in order to calculate the expected PUs to be earned. We record a compensation charge based on either the forecasted PUs to be earned (during the performance period) or the actual PUs earned (at the three-year anniversary of the grant date) over the vesting period for each of the awards. The fair value of PUs based on our performance against revenue, ROIC and Adjusted EBITDA targets is the excess of the market price of our common stock at the date of grant over the purchase price (which is typically zero). For PUs earned based on a market condition, we utilize a Monte Carlo simulation to fair value these awards at the date of grant, and such fair value is expensed over the three-year performance period. Under our various equity compensation plans, we may also grant RSUs. Our RSUs generally have a vesting period of three years from the date of grant. However, RSUs granted to our non-employee directors vest immediately upon grant. All RSUs accrue dividend equivalents associated with the underlying stock as we declare dividends. Dividends will generally be paid to holders of RSUs in cash upon the vesting date of the associated RSU and will be forfeited if the RSU does not vest. The fair value of RSUs is the excess of the market price of our common stock at the date of grant over the purchase price (which is typically zero). Expected volatility is calculated utilizing daily historical volatility over a period that equates to the expected life of the option. The risk-free interest rate was based on the United States Treasury interest rates whose term is consistent with the expected life (estimated period of time outstanding) of the stock options. Expected dividend yield is considered in the option pricing model and represents our current annualized expected per share dividends over the current trade price of our common stock. The expected life of the stock options granted is estimated using the historical exercise behavior of employees.
Income Taxes | Income Taxes Accounting for income taxes requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the tax and financial reporting bases of assets and liabilities and for loss and credit carryforwards. Valuation allowances are provided when recovery of deferred tax assets does not meet the more likely than not standard as defined in GAAP. We have elected to recognize interest and penalties associated with uncertain tax positions as a component of the Provision (benefit) for income taxes in the accompanying Consolidated Statements of Operations.
Income (Loss) Per Share-Basic and Diluted | Income (Loss) Per Share—Basic and Diluted Basic income (loss) per common share is calculated by dividing income (loss) by the weighted average number of common shares outstanding. The calculation of diluted income (loss) per share is consistent with that of basic income (loss) per share but gives effect to all potential common shares (that is, securities such as stock options, RSUs, PUs, warrants or convertible securities) that were outstanding during the period, unless the effect is antidilutive.
Allowance for Doubtful Accounts and Credit Memo Reserves | We maintain an allowance for doubtful accounts and credit memos for estimated losses resulting from the potential inability of our customers to make required payments and potential disputes regarding billing and service issues. When calculating the allowance, we consider our past loss experience, current and prior trends in our aged receivables and credit memo activity, current economic conditions and specific circumstances of individual receivable balances. If the financial condition of our customers were to significantly change, resulting in a significant improvement or impairment of their ability to make payments, an adjustment of the allowance may be required. We write-off uncollectible balances as circumstances warrant, generally, no later than one year past due.
Concentrations of Credit Risk | As per our risk management investment policy, we limit exposure to concentration of credit risk by limiting the amount invested in any one mutual fund to a maximum of 1% of the fund total assets or in any one financial institution to a maximum of $75,000.Concentrations of Credit Risk Financial instruments that potentially subject us to credit risk consist principally of cash and cash equivalents (including money market funds and time deposits) and accounts receivable.
Fair Value Measurements | Fair Value Measurements Entities are permitted under GAAP to elect to measure certain financial instruments and certain other items at either fair value or cost. We have elected the cost measurement option. Our financial assets or liabilities that are carried at fair value are required to be measured using inputs from the three levels of the fair value hierarchy. A financial asset or liability's classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels of the fair value hierarchy are as follows: Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that we have the ability to access at the measurement date. Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs). Level 3—Unobservable inputs that reflect our assumptions about the assumptions that market participants would use in pricing the asset or liability.
Redeemable Noncontrolling Interests | Redeemable Noncontrolling Interests Certain unaffiliated third parties own noncontrolling interests in our consolidated subsidiaries in Chile, India and South Africa. The underlying agreements between us and our noncontrolling interest shareholders for these subsidiaries contain provisions under which the noncontrolling interest shareholders can require us to purchase their respective interests in such subsidiaries at certain times and at a purchase price as stipulated in the underlying agreements (generally at fair value). These put options make these noncontrolling interests redeemable and, therefore, these noncontrolling interests are classified as temporary equity outside of stockholders' equity. Redeemable noncontrolling interests are reported at the higher of their redemption value or the noncontrolling interest holders' proportionate share of the underlying subsidiaries net carrying value. Increases or decreases in the redemption value of the noncontrolling interest are offset against Additional Paid-in Capital.
New Accounting Pronouncements | New Accounting Pronouncements Recently Adopted Accounting Pronouncements In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force) ("ASU 2018-15"). ASU 2018-15 aligns the accounting for costs incurred to implement a cloud computing arrangement that is a service arrangement with the guidance on capitalizing costs associated with developing or obtaining internal-use software. We adopted ASU 2018-15 on January 1, 2019. ASU 2018-15 did not have a material impact on our consolidated financial statements. In February 2016, the FASB issued ASU 2016-02. We adopted ASU 2016-02 on January 1, 2019 on a modified retrospective basis. See Note 2.m. for information regarding the impact of the adoption of ASU 2016-02 on our consolidated financial statements. Other As Yet Adopted Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses-Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 changes how entities will measure credit losses on most financial assets. The standard will eliminate the probable initial recognition of estimated losses and will provide a forward-looking expected credit loss model for accounts receivables, loans and other financial instruments. Adoption of the standard will be applied using a modified retrospective approach through a cumulative adjustment to retained earnings as of the effective date to align our credit loss methodology with the new standard. ASU 2016-13 is effective for us on January 1, 2020, with early adoption permitted. Under ASU 2016-13 we will be required to use a forward-looking expected credit loss model for accounts receivable, loans and other financial instruments. We do not expect ASU 2016-13 will have a material impact on our consolidated financial statements.
Changes in Presentation | We have historically classified our significant acquisition costs which represent operating expenditures associated with (1) the acquisition of Recall Holdings Limited ("Recall") that we completed on May 2, 2016 (the "Recall Transaction"), including: (i) advisory and professional fees to complete the Recall Transaction; (ii) costs associated with the Divestments (as defined in Note 13) required in connection with receipt of regulatory approvals (including transitional services); and (iii) costs to integrate Recall with our existing operations, including moving, severance, facility upgrade, REIT integration and system upgrade costs, as well as certain costs associated with our shared service center initiative for our finance, human resources and information technology functions; and (2) the advisory and professional fees to complete the IODC Transaction (as defined in Note 6) (collectively, "Significant Acquisition Costs"), as components of Selling, general and administrative expenses and Cost of sales. Beginning in 2019, we present Significant Acquisition Costs as its own line item within Operating Expenses in our Consolidated Statements of Operations. All prior periods have been conformed to this presentation. See Note 9 for Significant Acquisition Costs by segment.
Gains on Sale of Real Estate | Gains on Sale of Real Estate Subsequent to our conversion to a REIT, we have historically classified gains on sale of real estate, net of tax, as a separate line on our Consolidated Statements of Operations and excluded such amounts from our reported operating income. We presented such amounts net of tax as these gains were presented below the Provision (benefit) for income taxes in our Consolidated Statements of Operations. Beginning in 2019, we present gains on sale of real estate as a component of operating income in the line item (Gain) loss on disposal/write-down of property, plant and equipment, net. Such amounts are presented gross of tax with any tax impact presented within Provision (benefit) for income taxes in our Consolidated Statements of Operations. All prior periods have been conformed to this presentation.

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