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Organization and Summary of Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and footnotes. Examples include, but are not limited to, estimates of accounts receivable allowances, professional and general liabilities and the estimate of deferred tax assets or liabilities. Actual results could differ from those estimates.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, as well as interests in partnerships and limited liability companies controlled by the Company through its ownership of a majority voting interest or other rights granted to the Company by contract to manage and control the affiliate's business. All significant intercompany balances and transactions are eliminated in consolidation.

Pushdown Accounting

In connection with the change of control effective August 31, 2017, the Company elected to apply “pushdown” accounting by applying the guidance in Financial Accounting Standards Board ("FASB") Accounting Standards Codification Topic 805, Business Combinations. Accordingly, the consolidated financial statements of the Company for periods before and after August 31, 2017 reflect different bases of accounting, and the financial positions and results of operations of those periods are not comparable. Throughout the Company's consolidated financial statements and the accompanying notes herein, periods prior to August 31, 2017 (the date of the change of control) are identified as "Predecessor" and periods after the change of control are identified as "Successor." See Note 2. "Acquisitions and Disposals" for further discussion of the change of control.

Variable Interest Entities

The consolidated financial statements include the accounts of variable interest entities ("VIE") in which the Company is the primary beneficiary under the provisions of Accounting Standards Codification 810, Consolidation. The Company has the power to direct the activities that most significantly impact a variable interest entity's economic performance. Additionally, the Company would absorb the majority of the expected losses from any of these entities should such expected losses occur. At December 31, 2018 (Successor), the variable interest entities include four surgical facilities, three anesthesia practices and four physician practices. In 2018 (Successor), the Company divested of one surgical facility and acquired a physician practice, which were classified as VIEs.

Equity Method Investments

The Company has non-consolidating investments in surgical facilities and management companies that own or manage surgical facilities. These investments are accounted for using the equity method of accounting.

Fair Value of Financial Instruments

The fair values of the Term Loan, Senior Unsecured Notes due 2021 and the Senior Unsecured Notes due 2025 were based on a Level 2 inputs using quoted prices for identical liabilities in inactive markets at both December 31, 2018 (Successor) and 2017 (Predecessor). The carrying amounts related to the Company's other long-term debt obligations approximate their fair values under Level 3 calculations.

The fair value of these derivative financial instruments was based on a quoted market price, or a Level 2 computation. The Company had no derivative financial instruments as of December 31, 2017 (Successor).

The Company maintains a supplemental executive retirement savings plan (the "SERP") for certain executive officers. The SERP is a non-qualified deferred compensation plan for eligible executive officers and other key employees of the Company that allows participants to defer portions of their compensation. The fair value of the SERP asset and liability was based on a quoted market price, or a Level 1 computation

Fair Value of Financial Instruments

The fair value of a financial instrument is the amount at which the instrument could be exchanged in an orderly transaction between market participants to sell the asset or transfer the liability. The Company uses fair value measurements based on quoted prices in active markets for identical assets or liabilities (Level 1), inputs other than quoted prices in active markets that are either directly or indirectly observable (Level 2), or unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions (Level 3), depending on the nature of the item being valued.

The carrying amounts reported in the consolidated balance sheets for cash and cash equivalents, accounts receivable, restricted invested assets and accounts payable approximate their fair values under Level 3 calculations.

Revenues

Patient service revenues. This includes revenue related to charging facility fees in exchange for providing patient care. The fee charged for healthcare procedures performed in surgical facilities varies depending on the type of service provided, but usually includes all charges for usage of an operating room, a recovery room, special equipment, medical supplies, nursing staff and medications. The fee does not normally include professional fees charged by the patient’s surgeon, anesthesiologist or other attending physician, which are billed directly by such physicians to the patient or third-party payor. However, in several surgical facilities, the Company charges for anesthesia services. Ancillary service revenues include fees for patient visits to the Company's physician practices, pharmacy services and diagnostic tests ordered by physicians.

Patient service revenues are recognized as performance obligations are satisfied. Performance obligations are based on the nature of services provided. Typically, the Company recognizes revenue at a point in time in which services are rendered and the Company has no obligation to provide further patient services. As the Company primarily performs outpatient procedures, performance obligations are generally satisfied same day and revenue is recognized on the date of service.

The Company determines the transaction price based on gross charges for services provided, net of estimated contractual adjustments, discounts from third-party payors. The Company estimates its contractual adjustments and discounts based on contractual agreements, its discount policies and historical experience. Changes in estimated contractual adjustments and discounts are recorded in the period of change. As a result of changes in estimates to third-party settlements related to prior years the Company recognized an increase to patient service revenues of $2.1 million for the year ended December 31, 2018 (Successor), no adjustments for the four months ended December 31, 2017 (Successor), and an increase to patient service revenues of approximately $1.1 million and $6.8 million during the eight months ended August 31, 2017 (Predecessor) and the year ended December 31, 2016 (Predecessor), respectively.

Other service revenues. Optical service revenues consist of product sales from the Company's optical laboratories as well as handling charges billed to the members of the Company's optical products purchasing organization. The Company's optical products purchasing organization negotiates volume buying discounts with optical products manufacturers. The buying discounts and any handling charges billed to the members of the buying group represent the revenue recognized for financial reporting purposes. The Company satisfies the performance obligation and recognizes revenue when the orders are shipped to members. The Company bases its estimates for sales returns and discounts on historical experience and has not experienced significant fluctuations between estimated and actual return activity and discounts given. The Company's optical laboratories manufacture and distribute corrective lenses and eyeglasses to ophthalmologists and optometrists. The Company satisfies the performance obligation and recognize revenue when the product is shipped, net of allowance for discounts.

Other revenues include management and administrative service fees derived from the non-consolidated facilities that the Company accounts for under the equity method, management of surgical facilities in which it does not own an interest, and management services provided to physician practices for which the Company is not required to provide capital or additional assets. These agreements typically require the Company to provide recurring management services over a multi-year period which are billed and collected on a monthly basis. The fees derived from these management arrangements are based on a predetermined percentage of the revenues of each facility or practice and are recognized in the period in which management services are rendered and billed.

The increase in other revenues is primarily due to an increase in management and administrative service fees due to the acquisition of NSH. Total net revenues in 2018 additionally reflect the impact of the Company's adoption of ASU 2014-09 as discussed above.

Subsequent to the transactions on August 31, 2017 (Predecessor), the Company, as part of a review of operations undertaken to create a solid foundation to support the Company's long-term growth objectives, incurred a non-recurring adjustment to revenue of $15.6 million, which was attributable to an increase in reserves for certain accounts receivable during the eight months ended August 31, 2017 (Predecessor). The increase in reserves resulted from certain known events and actions during the eight months ended August 31, 2017 (Predecessor) related to select payors primarily in the Company’s ancillary services segment. Upon consideration of such additional information, related receivables were determined to have a low likelihood of collection. The majority of this adjustment related to receivables with balances from the first quarter of 2016 and prior.

Revenues

In May 2014, the FASB issued Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers. The Company adopted the new standard effective January 1, 2018, using the modified retrospective method. The presentation of the amount of earnings from operations and net earnings were unchanged upon adoption of the new standard; however, during the year of adoption, the Company determined that amounts historically considered to be bad debt should be considered an implicit price concession, as defined in FASB Accounting Standards Codification 606, “Revenue From Contracts With Customers”. This resulted in changes to the presentation of revenues and the provision for bad debts in the consolidated statements of operations. Previously, the estimate for unrealizable amounts was recorded to the provision for bad debts and presented as a component of operating expenses. Upon reassessment during the year of adoption, the estimate for unrealizable amounts is now reflected as an implicit price concession as a reduction to arrive at net revenue.

The Company's revenues generally relate to contracts with patients in which the performance obligations are to provide healthcare services. The Company recognizes revenues in the period in which our obligations to provide health care services are satisfied and reports the amount that reflects the consideration the Company expects to be entitled to. The Company's performance obligations are generally satisfied over a period of less than one day. The contractual relationships with patients, in most cases, also involve a third-party payer (e.g., Medicare, Medicaid, managed care health plans, employers and commercial insurance companies, including plans offered through the health insurance exchanges) and the transaction prices for the services provided are dependent upon the terms provided by or negotiated with the third-party payers. The payment arrangements with third-party payers for the services provided to the related patients typically specify payments at amounts less than the Company's standard charges. The Company continually reviews the contractual estimation process to consider and incorporate updates to laws and regulations and the frequent changes in managed care contractual terms resulting from contract renegotiations and renewals.

Cash, Cash Equivalents and Restricted Cash

The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. The Company maintains its cash and cash equivalent balances at high credit quality financial institutions.

Cash, cash equivalents and restricted cash reported within the consolidated statement of cash flows includes $0.3 million of restricted investments, which are reflected in other long-term assets in the consolidated balance sheet at both December 31, 2018 (Successor) and 2017 (Successor). These restricted investments represents restricted cash held in accordance with the provisions of a long-term operating lease agreement held as security for performance under the Company's covenants and obligations within the agreement through January 2024.

Accounts Receivable and Allowances for Contractual Adjustments and Doubtful Accounts

Accounts Receivable

Accounts receivable from third-party payors are recorded net of estimated implicit price concessions which are estimated based on the historical trend of the Company's surgical facilities’ cash collections and contractual write-offs, established fee schedules, relationships with payors and procedure statistics. While changes in estimated reimbursement from third-party payors remain a possibility, the Company expects that any such changes would be minimal and, therefore, would not have a material effect on its financial condition or results of operations.

Accounts receivable consists of receivables from federal and state agencies (under the Medicare and Medicaid programs), managed care health plans, commercial insurance companies, employers and patients. Management recognizes that revenues and receivables from government agencies are significant to the Company's operations, but it does not believe that there is significant credit risk associated with these government agencies. Concentration of credit risk with respect to other payors is limited because of the large number of such payors. As of December 31, 2018 (Successor) and December 31, 2017 (Successor), the Company had a net third-party Medicaid settlements liability of $4.8 million and $1.0 million, respectively.

The Company recognizes that final reimbursement of accounts receivable is subject to final approval by each third-party payor. However, because the Company has contracts with its third-party payors and also verifies insurance coverage of the patient before medical services are rendered, the amounts that are pending approval from third-party payors are not considered significant. Amounts are classified outside of self-pay if the Company has an agreement with the third-party payor or has verified a patient’s coverage prior to services rendered. The Company's policy is to collect co-payments and deductibles prior to providing medical services. It is also the Company's policy to verify a patient’s insurance prior to the patient’s procedure. Patient services of the Company are primarily non-emergency, which allows the surgical facilities to control the procedures for which third-party reimbursement is sought and obtained. The Company does not require collateral from self-pay patients.

The Company's collection policies and procedures are based on the type of payor, size of claim and estimated collection percentage for each patient account. The operating systems used to manage patient accounts provide for an aging schedule in 30-day increments, by payor, physician and patient. The Company analyzes accounts receivable at each of its surgical facilities to ensure the proper collection and aged category. The operating systems generate reports that assist in the collection efforts by prioritizing patient accounts. Collection efforts include direct contact with insurance carriers or patients, written correspondence and the use of legal or collection agency assistance, as required.

A summary of the changes in the allowance for doubtful accounts receivable follows (in thousands):



	Balance at Beginning of Period		Provision for Doubtful Accounts		Accounts Written off, Net of Recoveries			Impact of adoption of ASC 606			Balance at End of Period
Predecessor
Year ended December 31, 2016	$	18,322	$	24,212	$	(12,662	)	$	—		$	29,872
Eight months ended August 31, 2017	29,872		16,297		(14,096		)	—			32,073



Successor
Four months ended December 31, 2017	—		12,455		(10,429		)	—			2,026
Year ended December 31, 2018	2,026		—		—			(2,026		)	—

The receivables related to the Company's optical products purchasing organization are recognized separately from patient accounts receivable and are included in other current assets in the consolidated balance sheets.

Impairment of Long-Lived Assets, Goodwill and Intangible Assets

The Company evaluates the carrying value of long-lived assets when impairment indicators are present or when circumstances indicate that impairment may exist. The Company performs an impairment test by preparing an expected undiscounted cash flow projection. If the projection indicates that the recorded amount of the long-lived asset is not expected to be recovered, the carrying value is reduced to estimated fair value. The cash flow projection and fair value represents management’s best estimate, using appropriate and customary assumptions, projections and methodologies, at the date of evaluation. For discussion on impairment for goodwill and indefinite-lived intangible assets, refer to Note 4. "Goodwill and Intangible Assets."

Professional, General and Workers' Compensation Insurance

Professional and General and Workers' Compensation Insurance

The Company maintains general liability and professional liability insurance in excess of self-insured retentions through third party commercial insurance carriers in amounts that management believes is sufficient for the Company's operations, although, potentially, some claims may exceed the scope of coverage in effect. The professional and general insurance coverage is on a claims-made basis. The Company also maintains workers' compensation insurance, subject to a deductible.

The Company expenses the costs under the self-insured retention exposure for general and professional liability and workers' compensation claims which relate to (i) claims made during the policy period, which are offset by insurance recoveries and (ii) an estimate of claims incurred but not yet reported that are expected to be reported after the policy period expires. Reserves and provisions are based upon actuarially determined estimates using individual case-basis valuations and actuarial analysis. Reserves for professional, general and workers' compensation claim liabilities are determined with no regard for expected insurance recoveries and are presented gross on the consolidated balance sheets.

Derivative Instruments and Hedging Activities

In accordance with Accounting Standards Codification 815, Derivatives and Hedging, the Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. The Company may enter into derivative contracts that are intended to economically hedge certain of its risk, even though hedge accounting does not apply or the Company elects not to apply hedge accounting.

In accordance with the FASB’s fair value measurement guidance in ASU 2011-04, the Company made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio.

Cash Flow Hedges of Interest Rate Risk

The Company’s objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. During 2018, such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt.

For derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in Accumulated Other Comprehensive Income and subsequently reclassified into interest expense in the same period(s) during which the hedged transaction affects earnings, as documented at hedge inception in accordance with the Company’s accounting policy election. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on the Company’s variable-rate debt.

Non-Controlling Interests

The physician limited partners and physician minority members of the entities that the Company controls are responsible for the supervision and delivery of medical services. The governance rights of limited partners and minority members are restricted to those that protect their financial interests. Under certain partnership and operating agreements governing these partnerships and limited liability companies, the Company could be removed as the sole general partner or managing member for certain events such as material breach of the partnership or operating agreement, gross negligence or bankruptcy. These protective rights do not preclude consolidation of the respective partnerships and limited liability companies.

Ownership interests in consolidated subsidiaries held by parties other than the Company are identified and generally presented in the consolidated financial statements within the equity section but separate from the Company's equity. However, in instances in which certain redemption features that are not solely within the control of the Company are present, classification of non-controlling interests outside of permanent equity is required. Consolidated net income attributable to the Company and to the non-controlling interests are identified and presented on the consolidated statements of operations; changes in ownership interests in which the Company retains a controlling interest are accounted for as equity transactions assuming the Company continues to consolidate related entities. Certain transactions with non-controlling interests are classified within financing activities in the consolidated statements of cash flows.

The consolidated financial statements of the Company include all assets, liabilities, revenues and expenses of surgical facilities in which the Company has sufficient ownership and rights to allow the Company to consolidate the surgical facilities. Similar to its investments in non-consolidated affiliates, the Company regularly engages in the purchase and sale of ownership interests with respect to its consolidated subsidiaries that do not result in a change of control.

Non-Controlling Interests — Redeemable. Each partnership and limited liability company through which the Company owns and operates its surgical facilities is governed by a partnership or operating agreement. In certain circumstances, the applicable partnership or operating agreements for the Company's surgical facilities provide that the facilities will purchase all of the physician limited partners’ or physician minority members', as applicable, ownership if certain adverse regulatory events occur, such as it becoming illegal for the physician(s) to own an interest in a surgical facility, refer patients to a surgical facility or receive cash distributions from a surgical facility. The non-controlling interests — redeemable are reported outside of stockholders' equity in the consolidated balance sheets.

Inventories

Inventories, which consist primarily of medical and drug supplies, are stated at the lower of cost or market value. Cost is determined using the first-in, first-out method.

Recent Accounting Pronouncements

In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers," along with subsequent amendments, updates and an extension of the effective date (collectively the "New Revenue Standard"), which outlines a single comprehensive model for recognizing revenue and supersedes most existing revenue recognition guidance, including guidance specific to the healthcare industry. This five-step process requires significant management judgment in addition to changing the way many companies recognize revenue in their financial statements. The Company adopted this ASU on January 1, 2018 using the modified retrospective approach. During the initial year of adoption, the Company determined that amounts historically considered to be bad debt, and recognized as a component of operating expenses, are considered an implicit price concession, as defined in FASB Accounting Standards Codification 606, “Revenue From Contracts With Customers”. As a result, generally amounts previously reflected as a provision for bad debts in the consolidated income statements would be categorized as a component of revenues. This determination resulted in the reclassification of amounts previously disclosed in the Company's quarterly reports in the year as bad debt expense to net revenues for the year ended December 31, 2018 (refer to Note 16. "Quarterly Financial Information (Unaudited)" for reclassified quarterly results). This change had no impact on net income, income taxes or the balance sheet for the year ended and as of December 31, 2018, or any interim period therein. The adoption of this standard did not have a material impact on the Company's consolidated financial position, results of operations or cash flows. Adoption of the standard resulted in the Company revising its related disclosures.

In February 2016, the FASB issued ASU 2016-02, "Leases," which will require, among other items, lessees to recognize most leases as assets and liabilities on the balance sheet. Qualitative and quantitative disclosures will be enhanced to better understand the amount, timing and uncertainty of cash flows arising from leases. This guidance is effective for the Company's 2019 interim and annual financial statements. The Company plans to adopt ASU 2016-02 on January 1, 2019, using a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative periods presented in the financial statements. The Company believes the primary effect of adopting the new standard will be to record right-of-use assets and obligations for current operating leases with material increases in reported property and equipment and liabilities. The Company is still finalizing its calculation of the cumulative effect of accounting change to be recognized upon adoption. The Company is currently working to complete the implementation of new processes and information technology tools to assist in its ongoing lease data collection and analysis, and updating accounting policies and internal controls in connection with the adoption of the new standard.

In November 2016, the FASB issued ASU 2016-18, "Statement of Cash Flows – Restricted Cash," which requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The Company adopted this ASU on January 1, 2018 and retrospectively applied the guidance to all periods presented in the consolidated statement of cash flows. The retrospective application to prior periods had no impact on the Company's cash flows from operating, investing and financing activities as previously disclosed. Refer to discussion of restricted cash under the heading "Cash, Cash Equivalents and Restricted Cash" above.

Business Combinations

The Company accounts for business combinations in accordance with the fundamental requirements of the acquisition method of accounting and under the premise that an acquirer can be identified for each business combination. The acquirer is the entity that obtains control of one or more businesses in the business combination and the acquisition date is the date the acquirer achieves control. The assets acquired, liabilities assumed and any non-controlling interests in the acquired business at the acquisition date are recognized at their fair values as of that date, and the direct costs incurred in connection with the business combination are recorded and expensed separately from the business combination. Any goodwill recognized is determined as the excess of the fair value of the consideration conveyed plus the fair value of any non-controlling interests in the acquisition over the fair value of the net assets acquired. Acquisitions in which the Company is able to exert significant influence but does not have control are accounted for using the equity method.

Acquired assets and assumed liabilities typically include, but are not limited to, fixed assets, intangible assets and professional liabilities. The valuations are based on appraisal reports, discounted cash flow analyses, actuarial analyses or other appropriate valuation techniques to determine the fair value of the assets acquired or liabilities assumed. Fair value attributable to non-controlling interests is based on a Level 3 computation using significant inputs that are not observable in the market. Key inputs used to determine the fair value include financial multiples used in the purchase of non-controlling interests, primarily from acquisitions of surgical facilities. Such multiples, based on earnings, are used as a benchmark for the discount to be applied for the lack of control or marketability. Fair value attributable to the property and equipment acquired is based on Level 3 computations using key inputs such as cost trend data and comparable asset sales. Fair value attributable to the intangible assets acquired is based on Level 3 computations using key inputs such as the Company's internally-prepared financial projections. Fair values assigned to acquired working capital are based on carrying amounts reported by the acquiree at the date of acquisition, which approximate their fair values.

Property and Equipment

Property and equipment are stated at cost or, if obtained through acquisition, at fair value determined on the date of acquisition. Depreciation is recognized using the straight-line method over the estimated useful lives of the assets, generally 20 to 40 years for buildings and building improvements, three to five years for computers and software and five to seven years for furniture and equipment. Leasehold improvements are depreciated on a straight-line basis over the shorter of the lease term or the estimated useful life of the assets. Routine maintenance and repairs are expensed as incurred, while expenditures that increase capacities or extend useful lives are capitalized.

The Company also leases certain facilities and equipment under capital leases. Assets held under capital leases are stated at the present value of minimum lease payments at the inception of the related lease. Such assets are amortized on a straight-line basis over the lesser of the lease term or the remaining useful life of the leased asset.

Goodwill and Intangible Assets

Goodwill represents the fair value of the consideration provided in an acquisition over the fair value of net assets acquired and is not amortized. The Company has indefinite-lived intangible assets related to the certificates of need held in jurisdictions where certain of its surgical facilities are located and Medicare licenses. The Company also has finite-lived intangible assets related to physician guarantee agreements, non-compete agreements, management agreements and customer relationships. Physician income guarantees are amortized into salaries and benefits costs in the consolidated statements of operations over the commitment period of the contract, generally three to four years. Non-compete agreements and management rights agreements are amortized into depreciation and amortization expense in the consolidated statements of operations over the service lives of the agreements, typically ranging from two to five years for non-compete agreements and 15 years for the management rights agreements. Customer relationships are amortized into depreciation and amortization expense in the consolidated statements of operations over the estimated lives of the relationships, ranging from three to ten years.

The Company tests its goodwill and indefinite-lived intangible assets for impairment at least annually, as of October 1, or more frequently if certain indicators arise. The Company tests for goodwill impairment at the reporting unit level, which is defined as one level below an operating segment. As of October 1, 2018, the Company has identified three reporting units, which include the following: 1) Surgical Facilities, 2) Ancillary Services, and 3) The Alliance, including Optical Synergies ("Alliance"). The Alliance is a component of the Optical Services operating segment. In 2018, the Company disposed of two previously identified reporting units, Midwest Labs and Family Vision Care.

The Company compares the carrying value of the net assets of the reporting unit to the estimated fair value of the reporting unit. To determine the fair value of the reporting units, the Company obtained valuations at the reporting unit level prepared by third-party valuation specialists which utilized a combination of the income and market approaches. The discounted cash flow model is projected based on a year-by-year assessment that considers historical results, estimated market conditions, internal projections, and relevant publicly available statistics. Determining fair value requires the exercise of significant judgment, including assumptions about appropriate discount rates, perpetual growth rates and the amount and timing of expected future cash flows. The significant judgments are typically based upon Level 3 inputs, generally defined as unobservable inputs representing the Company's own assumptions. The cash flows employed in the discounted cash flow analysis are based on the Company's most recent budgets and business plans aligned with provided guidance and, when applicable, various growth rates are assumed for years beyond the current business plan period. Discount rate assumptions are based on an assessment of the risk inherent in the future cash flows of the respective reporting units. The variables within the discount rate, many of which are outside of the Company's control, provide the best estimate of all assumptions applied within the DCF model. There can be no assurance that operations will achieve the future cash flows reflected in the projections. In determining the fair value under the market approaches, the analysis includes a control premium, which was based on observable market data and a review of selected transactions of companies that operate in the Company's sector. While the Company believes that all assumptions utilized in the testing were appropriate, they may not reflect actual outcomes that could occur. Specific factors that could negatively impact the assumptions used include changes to the discount and growth rates and a change in the equity and enterprise premiums being realized in the market.

Leases

The Company leases office space and equipment for its surgical facilities, including surgical facilities under development. The lease agreements generally require the lessee, or the Company, to pay all maintenance, property taxes, utilities and insurance costs. The Company accounts for operating lease obligations and sublease income on a straight-line basis. Lease obligations paid in advance are recorded as prepaid rent and included in prepaid expenses and other current assets on the consolidated balance sheets. The difference between actual lease payments and straight-line lease expense over the initial lease term, excluding optional renewal periods, is recorded as deferred rent and included in other current liabilities and other long-term liabilities on the consolidated balance sheets.

Earnings Per Share

Basic and diluted earnings per share are calculated in accordance with Accounting Standards Codification 260, Earnings Per Share, based on the weighted-average number of shares outstanding in each period and dilutive stock options, unvested shares and warrants, to the extent such securities exist and have a dilutive effect on earnings per share. Beginning September 1, 2017 (Successor), in connection with the issuance of the Series A Preferred Stock, the Company began computing basic and diluted earnings per share using the two-class method. The two-class method of computing earnings per share is an earnings allocation method that determines earnings per share for common shares and participating securities according to their participation rights in dividends and undistributed earnings. Refer to Note 7. "Redeemable Preferred Stock", for further disclosure of the terms and conditions, including the participation rights, of the Series A Preferred Stock.

Income Taxes

The Company uses the asset and liability method to account for income taxes. Under this method, deferred income tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Any change in tax rates that could impact deferred tax assets or liabilities are recognized in the same period the change occurs. If a net operating loss ("NOL") carryforward exists, the Company makes a determination as to whether that NOL carryforward will be utilized in the future. A valuation allowance is established for certain net operating loss carryforwards when their recoverability is deemed to be uncertain. The carrying value of the net deferred tax assets assumes that the Company will be able to generate sufficient future taxable income in certain tax jurisdictions, based on estimates and assumptions. If these estimates and related assumptions change in the future, the Company may be required to adjust its deferred tax valuation allowances.

The Company, or one or more of its subsidiaries, files income tax returns in the U.S. federal jurisdiction and various state jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal income tax examinations for years prior to 2015 or state income tax examinations for years prior to 2014.

The Company and certain of its subsidiaries file a consolidated federal income tax return. The partnerships, limited liability companies, and certain non-consolidated physician practice corporations also file separate income tax returns. The Company's allocable portion of each partnership's and limited liability company's income or loss is included in taxable income of the Company. The remaining income or loss of each partnership and limited liability company is allocated to the other owners.

Equity-Based Compensation

Transactions in which the Company receives employee and non-employee services in exchange for the Company’s equity instruments or liabilities that are based on the fair value of the Company’s equity securities or may be settled by the issuance of these securities are accounted for using a fair value method. The Company’s policy is to recognize compensation expense using the straight line method over the relevant vesting period for units that vest based on time.