Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES a. Principles of Consolidation and Basis of Financial Statement Presentation These consolidated financial statements presented herein include the accounts of Career Education Corporation and our wholly-owned subsidiaries (collectively “CEC”). All inter-company transactions and balances have been eliminated. The results of operations of all acquired businesses have been consolidated for all periods subsequent to the date of acquisition. We currently organize our business across three reporting segments: CTU, AIU (comprises University Group) and All Other Campuses (formerly separately reported as the Culinary Arts and Transitional Group). Campuses included in our All Other Campuses segment are currently being taught out and no longer enroll new students or have completed their teach-out. These campuses employ a gradual teach-out process, enabling them to continue to operate while current students have a reasonable opportunity to complete their program of study. b. Reclassifications During the fourth quarter 2017, the Company reorganized its segments related to teach-out campuses and now report all teach-out campuses within the All Other Campuses segment, as part of our continuing operations. Previously, campuses within this segment were recorded and presented under Culinary Arts (comprised of our former Le Cordon Bleu “LCB” institutions) and Transitional Group (comprised of our Sanford-Brown, Briarcliffe and Harrington institutions) segments. During the third quarter of 2017, the Company completed teach-outs of all Culinary Arts campuses and therefore, in accordance with the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 360, Culinary Arts is no longer its own operating segment. Effective January 2017, the Company accounts for cash flows related to cash payments for employee taxes made by the Company on the employees’ behalf for withheld shares related to stock settlements as a financing activity within the statement of cash flows in accordance with the updated guidance issued by the FASB under ASC No. 2016-09, Compensation – Stock Compensation (Topic 718). Prior period amounts were recast to cash flows from financing activities from cash flows from operating activities to be comparable to current year reporting. Effective January 2017, the Company accounts for cash flows related to changes in restricted cash and restricted cash equivalents within cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This change was a result of updated guidance issued by the FASB under ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. Prior period amounts are now included in cash and cash equivalents, beginning and end of the period, which were previously presented within cash flows from financing activities for changes in balances, to be comparable to current year reporting. c. Management’s Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles in the U.S. (“GAAP”) requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities as of the date of the financial statements and reported amounts of revenues and expenses during the reported period. We regularly evaluate the accounting policies and estimates that we use to prepare our financial statements. Significant estimates, among others, include the allowance for doubtful accounts, the assumptions surrounding sublease income utilized in determining the fair value of remaining lease obligations, assumptions utilized in calculating income tax related matters including our deferred tax balances and any respective valuation allowance and fair values used in asset impairment evaluations including goodwill, intangible assets and long-lived assets. Although these estimates are based upon management’s best knowledge of current events and actions that we may undertake in the future, actual results could differ from these estimates. d. Concentration of Credit Risk A substantial portion of credit extended to students is repaid through the students’ participation in various federal financial aid programs authorized by Title IV of the Higher Education Act of 1965, as amended (“Higher Education Act”), which we refer to as “Title IV Programs.” For the years ended December 31, 2017, 2016 and 2015, approximately 78%, 76% and 77%, respectively, of our institutions’ cash receipts from tuition payments came from Title IV Program funding. Transfers of funds received from Title IV Programs are made in accordance with the U.S. Department of Education’s (“ED”) requirements. Changes in ED funding of Title IV Programs could have a material impact on our ability to attract students and the realizability of our student receivables. See Item 1A, “Risk Factors,” of this Annual Report on Form 10-K for further discussion of the risks associated with Title IV Programs. e. Student Receivables and Allowance for Doubtful Accounts Student receivables represent funds owed to us in exchange for the educational services that we provided to a student. Student receivables are reported net of an allowance for doubtful accounts and net of deferred tuition revenue, as determined on a student-by-student basis as of the end of the reporting period. Student receivables which are due to be paid in less than one year are recorded as current assets within our consolidated balance sheets. Student receivables which are due to be paid at dates ranging from one to three years from the balance sheet date are reported as non-current assets within our consolidated balance sheets. Generally, a student receivable balance is written off once it reaches greater than 90 days past due. Although we analyze past due receivables, it is not practical to provide an aging of our non-current student receivable balances as a result of the methodology utilized in determining our earned student receivable balances. Student receivables are recognized on our consolidated balance sheets as they are deemed earned over the course of a student’s program and/or term, and therefore cash collections are not applied against specifically dated transactions. We extend unsecured credit to a portion of the students who are enrolled at our institutions for tuition and certain other educational costs. Based upon past experience and judgment, we establish an allowance for doubtful accounts with respect to student receivables which we estimate will ultimately not be collectible. As such, our results from operations only reflect the amount of revenue that is estimated to be reasonably collectible. Our standard allowance estimation methodology considers a number of factors that, based on our collections experience, we believe have an impact on our credit risk and the realizability of our student receivables. Among these factors are a student’s status (in-school or out-of-school), anticipated funding source (third party, internal short-term and extended payment plans) and status of funding, whether or not an out-of-school student has completed his or her program of study, and our overall collections history. We monitor our collections and write-off experience to assess whether or not adjustments to our allowance percentage estimates are necessary. Changes in trends in any of the factors that we believe impact the realizability of our student receivables, as noted above, or modifications to our credit standards, collection practices, and other related policies may impact our estimate of our allowance for doubtful accounts and our results from operations. Additionally, we monitor certain internal and external factors, including changes in our academic programs, as well as changes in the current economic, legislative and regulatory environments and the ability to complete the federal financial aid process with the student. f. Fair Value of Financial Instruments The fair value measure of accounting for financial instruments establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The fair value for restricted short-term investments and short-term investments reported in our consolidated balance sheets are valued at Level 1 and Level 2 within the fair value hierarchy. Restricted short-term investments are comprised of certificates of deposit to provide securitization of our letters of credit pursuant to our current credit agreement. See Note 4 “Financial Instruments’ for further details. g. Revenue Recognition Our revenue, which is derived primarily from academic programs taught to students who attend our institutions, is generally segregated into two categories: (1) tuition and fees and (2) other. Tuition and fees represent costs to our students for educational services provided by our institutions. Our institutions charge tuition and fees at varying amounts, depending on the institution, the type of program and specific curriculum. A majority of our institutions bill students a single charge that covers tuition and required program materials, such as textbooks and supplies, which we treat as a single accounting unit. Generally, we bill student tuition, including those treated as a single accounting unit, at the beginning of each academic period, and recognize the tuition as revenue on a straight-line basis over either the academic term or program period, which includes any applicable externship period. The tuition earnings method is determined by the type of program a student is enrolled in. Typically, our institutions earn tuition over each academic term. Certain institutions charge fees, such as technology fees and laboratory fees, for certain terms and/or programs. These fees are earned over the applicable term. The portion of tuition and fee payments received from students but not yet earned is recorded as deferred tuition revenue and reported as a current liability on our consolidated balance sheets, as we expect to earn these revenues within the next year. Deferred tuition revenue is stated net of outstanding student receivables on a student-by-student basis as of the end of the reporting period. If a student withdraws from one of our institutions prior to the completion of the academic term or program period, we refund the portion of tuition and fees already paid that, pursuant to our refund policy and applicable federal and state law and accrediting agency standards, we are not entitled to retain. Generally, the amount to be refunded to a student is calculated based upon the period of time the student has attended classes and the amount of tuition and fees paid by the student as of their withdrawal date. These refunds typically reduce deferred tuition revenue and cash on our consolidated balance sheets as we generally do not recognize tuition revenue in our consolidated statements of (loss) income and comprehensive (loss) income until the related refund provisions have lapsed. Management reassesses collectability when a student withdraws from the institution and has unpaid tuition charges. Such unpaid charges do not meet the threshold of reasonably collectible and are recognized as revenue on a cash basis. Our institutions’ academic year is generally at least 30 weeks in length but varies both by institution and program of study and is divided by academic terms or payment periods. Academic terms or payment periods are determined by regulatory requirements mandated by the federal government and/or applicable accrediting body, which also vary by institution and program. Academic terms are determined by start dates, which vary by institution and program. Our students finance costs through a variety of funding sources, including, among others, federal loan and grant programs, institution payment plans, private loans and grants, private and institutional scholarships and cash payments. Other revenue, which consists primarily of bookstore sales for institutions not using single-charge billing and contract-training revenue, is billed and recognized as goods are delivered or services are performed. h. Cash and Cash Equivalents Cash and cash equivalents consist of highly liquid investments with original maturities of three months or less. The fair market value of cash and cash equivalents approximate their carrying value. The cash in the Company’s banks is not fully insured by the Federal Deposit Insurance Corporation. Restricted cash balances are used to provide securitization for letters of credit. Restricted cash balances as of December 31, 2017 and 2016 total $0.8 million and $1.4 million, respectively. Students at our institutions may receive grants, loans and work-study opportunities to fund their education under Title IV Programs. In certain instances, students may request that we retain a portion of their Title IV funds provided to them in excess of tuition billings. Students may authorize us to apply these funds to historical balances or future charges and/or distribute them directly to the student in certain cases. As of December 31, 2017, we held $2.3 million of these funds on behalf of students within cash and cash equivalents on our consolidated balance sheet. i. Discontinued Operations Discontinued operations are accounted for in accordance with FASB ASC Section 360-10-35 Property, Plant, and Equipment. In accordance with FASB ASC Section 360-10-35, the net assets of discontinued operations are recorded on our consolidated balance sheets at estimated fair value. The results of operations of discontinued operations are segregated from continuing operations and reported separately as discontinued operations in our consolidated statements of (loss) income and comprehensive (loss) income. See Note 17 “Discontinued Operations” for further discussion. Effective January 1, 2015, ASC Topic 360 limits discontinued operations reporting to disposals of components of an entity that represent a strategic shift upon disposal that have or will have a major effect on an entity’s operations and financial results. We did not have any disposals since the 2015 effective date which met the revised definition of discontinued operations and accordingly all disposals since January 1, 2015 continue to be reported within continuing operations for all periods presented. j. Investments Our investments, which primarily consist of non-governmental debt securities, treasury and federal agencies, and municipal bonds are classified as “available-for-sale” and recorded at fair value. Any unrealized holding gains or temporary unrealized holding losses, net of income tax effects, are reported as a component of accumulated other comprehensive (loss) income within stockholders’ equity. Realized gains and losses are computed on the basis of specific identification and are included in miscellaneous income (expense) in our consolidated statements of (loss) income and comprehensive (loss) income. We use the equity method to account for our investment in equity securities if our investment gives us the ability to exercise significant influence over operating and financial policies of the investee. We include our proportionate share of earnings and/or losses of our equity method investee in other income (expense) within our consolidated statements of (loss) income and comprehensive (loss) income. The carrying value of our equity investment is reported within other non-current assets on our consolidated balance sheets. Our investment in an equity affiliate equated to a 30.7%, or $3.2 million, non-controlling interest in CCKF, a Dublin-based educational technology company providing intelligent systems to power the delivery of individualized and personalized learning. k. Inventories Inventories, consisting principally of program materials, textbooks and supplies, are stated at the lower of cost, determined on a first-in, first-out basis, or market. The cost of inventory is reflected as a component of educational services and facilities expense as the items are used or sold. l. Property and Equipment Property and equipment are stated at cost less accumulated depreciation. Depreciation and amortization are recognized using the straight-line method over the estimated useful lives of the related assets for financial reporting purposes and an accelerated method for income tax reporting purposes. Leasehold improvements are amortized on a straight-line basis over the shorter of the life of the lease or the useful life. Maintenance, repairs, minor renewals and betterments are expensed as incurred, and major improvements, which extend the useful life of the asset, are capitalized. m. Goodwill and Intangible Assets Goodwill represents the excess of cost over fair market value of identifiable net assets acquired through business purchases. In accordance with FASB ASC Topic 350 – Intangibles-Goodwill and Other, we review goodwill for impairment on at least an annual basis by applying a fair-value-based test. In evaluating the recoverability of the carrying value of goodwill, we must make assumptions regarding the fair value of our reporting units, as defined under FASB ASC Topic 350. Our reporting units that have goodwill balances remaining as of December 31, 2017 include AIU and CTU. Goodwill is evaluated by comparing the book value of a reporting unit, including goodwill, with its fair value, as determined by a combination of income and market approach valuation methodologies. If the book value of a reporting unit exceeds its fair value, goodwill of the reporting unit is considered to be impaired. The amount of impairment loss is equal to the excess of the book value of the goodwill over the fair value of goodwill. In performing our annual review of goodwill balances for impairment, we estimate the fair value of each of our reporting units based on projected future operating results and cash flows, market assumptions and/or comparative market multiple methods. Determining fair value requires significant estimates and assumptions based on an evaluation of a number of factors, such as marketplace participants, relative market share, new student interest, student retention, future expansion or contraction expectations, amount and timing of future cash flows and the discount rate applied to the cash flows. Projected future operating results and cash flows used for valuation purposes do reflect improvements relative to recent historical periods with respect to, among other things, modest revenue growth and operating margins. Although we believe our projected future operating results and cash flows and related estimates regarding fair values are based on reasonable assumptions, historically projected operating results and cash flows have not always been achieved. The failure of one of our reporting units to achieve projected operating results and cash flows in the near term or long term may reduce the estimated fair value of the reporting unit below its carrying value and result in the recognition of a goodwill impairment charge. Significant management judgment is necessary to evaluate the impact of operating and macroeconomic changes and to estimate future cash flows. Assumptions used in our impairment evaluations, such as forecasted growth rates and our cost of capital, are based on the best available market information and are consistent with our internal forecasts and operating plans. In addition to cash flow estimates, our valuations are sensitive to the rate used to discount cash flows and future growth assumptions. These assumptions could be adversely impacted by certain of the risks discussed in Item 1A, “Risk Factors,” in this Annual Report on Form 10-K. Intangible assets include indefinite lived assets. Indefinite-lived assets include our CTU trade name and accreditation rights, which are recorded at fair market value upon acquisition and subsequently reviewed on an annual basis for impairment. Accreditation rights represent the ability of our institutions to participate in Title IV Programs. See Note 8 “Goodwill and Other Intangible Assets” for further discussion. n. Impairment of Long-Lived Assets We review property and equipment and other long-lived assets for impairment on an annual basis or whenever adverse events or changes in circumstances indicate that the carrying amounts of such assets may not be recoverable. If such adverse events or changes in circumstances occur, we will recognize an impairment loss if the undiscounted future cash flows expected to be generated by the assets are less than the carrying value of the related assets. The impairment loss would reduce the carrying value of the assets to their estimated fair value. See Note 6 “Property and Equipment” for further discussion. o. Contingencies During the ordinary course of business, we are subject to various claims and contingencies. In accordance with FASB ASC Topic 450 – Contingencies, when we become aware of a claim or potential claim, we assess the likelihood of any related loss or exposure. The probability of whether an asset has been impaired or a liability has been incurred, and whether the amount of loss can be reasonably estimated, is analyzed, and if the loss contingency is both probable and reasonably estimable, then we accrue for costs, including direct costs incurred, associated with the loss contingency. If no accrual is made but the loss contingency is reasonably possible, we disclose the nature of the contingency and the related estimate of possible loss or range of loss if such an estimate can be made. For all matters that are currently being reviewed, we expense legal fees, including defense costs, as they are incurred. Loss contingencies include, but are not limited to, possible losses related to legal proceedings and regulatory compliance matters, and our assessment of exposure requires subjective assessment. Liabilities established to provide for contingencies are adjusted as further information develops, circumstances change, or contingencies are resolved. See Note 11 “Contingencies” for additional information. p. Income Taxes We are subject to the income tax laws of the U.S. and various state and local jurisdictions. These tax laws are complex and subject to interpretation. As a result, significant judgments and interpretations are required in determining our income tax provisions (benefits) and evaluating our uncertain tax positions. We account for income taxes in accordance with FASB ASC Topic 740 – Income Taxes. Topic 740 requires the recognition of deferred income tax assets and liabilities based upon the income tax consequences of temporary differences between financial reporting and income tax reporting by applying enacted statutory income tax rates applicable to future years to differences between the financial statement carrying amounts and the income tax basis of existing assets and liabilities. Topic 740 also requires that deferred income tax assets be reduced by a valuation allowance if it is more likely than not that some portion of the deferred income tax asset will not be realized. In assessing the need for a valuation allowance and/or release of a valuation allowance, we consider both positive and negative evidence related to the likelihood of realization of the deferred tax assets. Topic 740 provides that important factors in determining whether a deferred tax asset will be realized are whether there has been sufficient taxable income in recent years and whether sufficient taxable income is expected in future years in order to utilize the deferred tax asset. In evaluating the realizability of deferred income tax assets, we consider, among other things, historical levels of taxable income along with possible sources of future taxable income, which include: the expected timing of the reversals of existing temporary reporting differences, the existence of taxable income in prior carryback year(s), the expected impact of tax planning strategies that may be implemented to prevent the potential loss of future income tax benefits, expected future taxable income and earnings history exclusive of the loss that created the future deductible amount, coupled with evidence indicating the loss is not a continuing condition. Changes in, among other things, income tax legislation, statutory income tax rates, or future taxable income levels could materially impact our valuation of income tax assets and liabilities and could cause our income tax provision to vary significantly among financial reporting periods. If, based on the weight of available evidence, it is more likely than not the deferred tax assets will not be realized, we record a valuation allowance, or release all or a portion of the valuation allowance if it is more likely than not the deferred tax assets are expected to be realized. The weight given to the positive and negative evidence is commensurate with the extent to which the evidence may be objectively verified. A high degree of judgment is required to determine if, and the extent to which, valuation allowances should be recorded against deferred tax assets. Topic 740 further clarifies the accounting for uncertainty in income taxes recognized in an entity’s financial statements and prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in an income tax return. Topic 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. q. Deferred Rent Obligations Many of the real estate operating lease agreements to which we are party contain rent escalation clauses or lease incentives, such as rent abatements or tenant improvement allowances. Rent escalation clauses and lease incentives are taken into account in determining total rent expense to be recognized during the term of the lease, which begins on the date that we take control of the leased space. Renewal options are considered when evaluating the overall term of the lease. In accordance with FASB ASC Topic 840 – Leases, differences between periodic rent expense and periodic cash rental payments, caused primarily by the recognition of rent expense on a straight-line basis and tenant improvement allowances due or received from lessors, are recorded as deferred rent obligations on our consolidated balance sheets. We record tenant improvement allowances as a deferred rent obligation on our consolidated balance sheets and as a cash inflow from operating activities on our consolidated statements of cash flows. We record capital expenditures funded by tenant improvement allowances received as a leasehold improvement on our consolidated balance sheets and as an investing activity within our consolidated statements of cash flows. r. Share-Based Compensation FASB ASC Topic 718 – Compensation-Stock Compensation requires that all share-based payments to employees and non-employee directors, including grants of stock options, shares or units of restricted stock, and the compensatory elements of employee stock purchase plans, be recognized in the financial statements based on the estimated fair value of the equity or liability instruments issued. Our share-based awards are measured at fair value and recognized over the requisite service or performance period. The fair value of each stock option is estimated on the date of grant using the Black-Scholes option pricing model, based on the market price of the underlying common stock, expected life, expected stock price volatility and expected risk-free interest rate. Expected volatility is computed using a combination of historical volatility for a period equal to the expected term; the risk-free interest rates are based on the US Treasury yield curve, with a remaining term approximately equal to the expected term used in the option pricing model. The fair value of each restricted stock unit award is estimated based on the market price of the underlying common stock on the date of the grant. We estimate forfeitures at the time of grant and revise our estimate in subsequent periods if actual forfeitures differ from those estimates. See Note 13 “Share-Based Compensation” for further discussion of our share-based compensation plans, the nature of share-based awards issued under the plans and our accounting for share-based awards. s. Advertising Costs Advertising costs are expensed as incurred. Advertising costs for continuing operations, which are included in general and administrative expenses on our consolidated statements of (loss) income and comprehensive (loss) income, were $136.1 million, $154.9 million and $220.5 million, for the years ended December 31, 2017, 2016 and 2015, respectively.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

a. Principles of Consolidation and Basis of Financial Statement Presentation

These consolidated financial statements presented herein include the accounts of Career Education Corporation and our wholly-owned subsidiaries (collectively “CEC”). All inter-company transactions and balances have been eliminated. The results of operations of all acquired businesses have been consolidated for all periods subsequent to the date of acquisition.

We currently organize our business across three reporting segments: CTU, AIU (comprises University Group) and All Other Campuses (formerly separately reported as the Culinary Arts and Transitional Group). Campuses included in our All Other Campuses segment are currently being taught out and no longer enroll new students or have completed their teach-out. These campuses employ a gradual teach-out process, enabling them to continue to operate while current students have a reasonable opportunity to complete their program of study.

b. Reclassifications

During the fourth quarter 2017, the Company reorganized its segments related to teach-out campuses and now report all teach-out campuses within the All Other Campuses segment, as part of our continuing operations. Previously, campuses within this segment were recorded and presented under Culinary Arts (comprised of our former Le Cordon Bleu “LCB” institutions) and Transitional Group (comprised of our Sanford-Brown, Briarcliffe and Harrington institutions) segments. During the third quarter of 2017, the Company completed teach-outs of all Culinary Arts campuses and therefore, in accordance with the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 360, Culinary Arts is no longer its own operating segment.

Effective January 2017, the Company accounts for cash flows related to cash payments for employee taxes made by the Company on the employees’ behalf for withheld shares related to stock settlements as a financing activity within the statement of cash flows in accordance with the updated guidance issued by the FASB under ASC No. 2016-09, Compensation – Stock Compensation (Topic 718). Prior period amounts were recast to cash flows from financing activities from cash flows from operating activities to be comparable to current year reporting.

Effective January 2017, the Company accounts for cash flows related to changes in restricted cash and restricted cash equivalents within cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This change was a result of updated guidance issued by the FASB under ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. Prior period amounts are now included in cash and cash equivalents, beginning and end of the period, which were previously presented within cash flows from financing activities for changes in balances, to be comparable to current year reporting.

c. Management’s Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles in the U.S. (“GAAP”) requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities as of the date of the financial statements and reported amounts of revenues and expenses during the reported period. We regularly evaluate the accounting policies and estimates that we use to prepare our financial statements. Significant estimates, among others, include the allowance for doubtful accounts, the assumptions surrounding sublease income utilized in determining the fair value of remaining lease obligations, assumptions utilized in calculating income tax related matters including our deferred tax balances and any respective valuation allowance and fair values used in asset impairment evaluations including goodwill, intangible assets and long-lived assets. Although these estimates are based upon management’s best knowledge of current events and actions that we may undertake in the future, actual results could differ from these estimates.

d. Concentration of Credit Risk

A substantial portion of credit extended to students is repaid through the students’ participation in various federal financial aid programs authorized by Title IV of the Higher Education Act of 1965, as amended (“Higher Education Act”), which we refer to as “Title IV Programs.” For the years ended December 31, 2017, 2016 and 2015, approximately 78%, 76% and 77%, respectively, of our institutions’ cash receipts from tuition payments came from Title IV Program funding.

Transfers of funds received from Title IV Programs are made in accordance with the U.S. Department of Education’s (“ED”) requirements. Changes in ED funding of Title IV Programs could have a material impact on our ability to attract students and the realizability of our student receivables. See Item 1A, “Risk Factors,” of this Annual Report on Form 10-K for further discussion of the risks associated with Title IV Programs.

e. Student Receivables and Allowance for Doubtful Accounts

Student receivables represent funds owed to us in exchange for the educational services that we provided to a student. Student receivables are reported net of an allowance for doubtful accounts and net of deferred tuition revenue, as determined on a student-by-student basis as of the end of the reporting period. Student receivables which are due to be paid in less than one year are recorded as current assets within our consolidated balance sheets. Student receivables which are due to be paid at dates ranging from one to three years from the balance sheet date are reported as non-current assets within our consolidated balance sheets.

Generally, a student receivable balance is written off once it reaches greater than 90 days past due. Although we analyze past due receivables, it is not practical to provide an aging of our non-current student receivable balances as a result of the methodology utilized in determining our earned student receivable balances. Student receivables are recognized on our consolidated balance sheets as they are deemed earned over the course of a student’s program and/or term, and therefore cash collections are not applied against specifically dated transactions.

We extend unsecured credit to a portion of the students who are enrolled at our institutions for tuition and certain other educational costs. Based upon past experience and judgment, we establish an allowance for doubtful accounts with respect to student receivables which we estimate will ultimately not be collectible. As such, our results from operations only reflect the amount of revenue that is estimated to be reasonably collectible. Our standard allowance estimation methodology considers a number of factors that, based on our collections experience, we believe have an impact on our credit risk and the realizability of our student receivables. Among these factors are a student’s status (in-school or out-of-school), anticipated funding source (third party, internal short-term and extended payment plans) and status of funding, whether or not an out-of-school student has completed his or her program of study, and our overall collections history.

We monitor our collections and write-off experience to assess whether or not adjustments to our allowance percentage estimates are necessary. Changes in trends in any of the factors that we believe impact the realizability of our student receivables, as noted above, or modifications to our credit standards, collection practices, and other related policies may impact our estimate of our allowance for doubtful accounts and our results from operations. Additionally, we monitor certain internal and external factors, including changes in our academic programs, as well as changes in the current economic, legislative and regulatory environments and the ability to complete the federal financial aid process with the student.

f. Fair Value of Financial Instruments

The fair value measure of accounting for financial instruments establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

The fair value for restricted short-term investments and short-term investments reported in our consolidated balance sheets are valued at Level 1 and Level 2 within the fair value hierarchy. Restricted short-term investments are comprised of certificates of deposit to provide securitization of our letters of credit pursuant to our current credit agreement. See Note 4 “Financial Instruments’ for further details.

g. Revenue Recognition

Our revenue, which is derived primarily from academic programs taught to students who attend our institutions, is generally segregated into two categories: (1) tuition and fees and (2) other. Tuition and fees represent costs to our students for educational services provided by our institutions. Our institutions charge tuition and fees at varying amounts, depending on the institution, the type of program and specific curriculum. A majority of our institutions bill students a single charge that covers tuition and required program materials, such as textbooks and supplies, which we treat as a single accounting unit. Generally, we bill student tuition, including those treated as a single accounting unit, at the beginning of each academic period, and recognize the tuition as revenue on a straight-line basis over either the academic term or program period, which includes any applicable externship period. The tuition earnings method is determined by the type of program a student is enrolled in. Typically, our institutions earn tuition over each academic term. Certain institutions charge fees, such as technology fees and laboratory fees, for certain terms and/or programs. These fees are earned over the applicable term. The portion of tuition and fee payments received from students but not yet earned is recorded as deferred tuition revenue and reported as a current liability on our consolidated balance sheets, as we expect to earn these revenues within the next year. Deferred tuition revenue is stated net of outstanding student receivables on a student-by-student basis as of the end of the reporting period.

If a student withdraws from one of our institutions prior to the completion of the academic term or program period, we refund the portion of tuition and fees already paid that, pursuant to our refund policy and applicable federal and state law and accrediting agency standards, we are not entitled to retain. Generally, the amount to be refunded to a student is calculated based upon the period of time the student has attended classes and the amount of tuition and fees paid by the student as of their withdrawal date. These refunds typically reduce deferred tuition revenue and cash on our consolidated balance sheets as we generally do not recognize tuition revenue in our consolidated statements of (loss) income and comprehensive (loss) income until the related refund provisions have lapsed. Management reassesses collectability when a student withdraws from the institution and has unpaid tuition charges. Such unpaid charges do not meet the threshold of reasonably collectible and are recognized as revenue on a cash basis.

Our institutions’ academic year is generally at least 30 weeks in length but varies both by institution and program of study and is divided by academic terms or payment periods. Academic terms or payment periods are determined by regulatory requirements mandated by the federal government and/or applicable accrediting body, which also vary by institution and program. Academic terms are determined by start dates, which vary by institution and program. Our students finance costs through a variety of funding sources, including, among others, federal loan and grant programs, institution payment plans, private loans and grants, private and institutional scholarships and cash payments.

Other revenue, which consists primarily of bookstore sales for institutions not using single-charge billing and contract-training revenue, is billed and recognized as goods are delivered or services are performed.

h. Cash and Cash Equivalents

Cash and cash equivalents consist of highly liquid investments with original maturities of three months or less. The fair market value of cash and cash equivalents approximate their carrying value. The cash in the Company’s banks is not fully insured by the Federal Deposit Insurance Corporation. Restricted cash balances are used to provide securitization for letters of credit. Restricted cash balances as of December 31, 2017 and 2016 total $0.8 million and $1.4 million, respectively.

Students at our institutions may receive grants, loans and work-study opportunities to fund their education under Title IV Programs. In certain instances, students may request that we retain a portion of their Title IV funds provided to them in excess of tuition billings. Students may authorize us to apply these funds to historical balances or future charges and/or distribute them directly to the student in certain cases. As of December 31, 2017, we held $2.3 million of these funds on behalf of students within cash and cash equivalents on our consolidated balance sheet.

i. Discontinued Operations

Discontinued operations are accounted for in accordance with FASB ASC Section 360-10-35 Property, Plant, and Equipment. In accordance with FASB ASC Section 360-10-35, the net assets of discontinued operations are recorded on our consolidated balance sheets at estimated fair value. The results of operations of discontinued operations are segregated from continuing operations and reported separately as discontinued operations in our consolidated statements of (loss) income and comprehensive (loss) income. See Note 17 “Discontinued Operations” for further discussion.

Effective January 1, 2015, ASC Topic 360 limits discontinued operations reporting to disposals of components of an entity that represent a strategic shift upon disposal that have or will have a major effect on an entity’s operations and financial results. We did not have any disposals since the 2015 effective date which met the revised definition of discontinued operations and accordingly all disposals since January 1, 2015 continue to be reported within continuing operations for all periods presented.

j. Investments

Our investments, which primarily consist of non-governmental debt securities, treasury and federal agencies, and municipal bonds are classified as “available-for-sale” and recorded at fair value. Any unrealized holding gains or temporary unrealized holding losses, net of income tax effects, are reported as a component of accumulated other comprehensive (loss) income within stockholders’ equity. Realized gains and losses are computed on the basis of specific identification and are included in miscellaneous income (expense) in our consolidated statements of (loss) income and comprehensive (loss) income.

We use the equity method to account for our investment in equity securities if our investment gives us the ability to exercise significant influence over operating and financial policies of the investee. We include our proportionate share of earnings and/or losses of our equity method investee in other income (expense) within our consolidated statements of (loss) income and comprehensive (loss) income. The carrying value of our equity investment is reported within other non-current assets on our consolidated balance sheets.

Our investment in an equity affiliate equated to a 30.7%, or $3.2 million, non-controlling interest in CCKF, a Dublin-based educational technology company providing intelligent systems to power the delivery of individualized and personalized learning.

k. Inventories

Inventories, consisting principally of program materials, textbooks and supplies, are stated at the lower of cost, determined on a first-in, first-out basis, or market. The cost of inventory is reflected as a component of educational services and facilities expense as the items are used or sold.

l. Property and Equipment

Property and equipment are stated at cost less accumulated depreciation. Depreciation and amortization are recognized using the straight-line method over the estimated useful lives of the related assets for financial reporting purposes and an accelerated method for income tax reporting purposes. Leasehold improvements are amortized on a straight-line basis over the shorter of the life of the lease or the useful life. Maintenance, repairs, minor renewals and betterments are expensed as incurred, and major improvements, which extend the useful life of the asset, are capitalized.

m. Goodwill and Intangible Assets

Goodwill represents the excess of cost over fair market value of identifiable net assets acquired through business purchases. In accordance with FASB ASC Topic 350 – Intangibles-Goodwill and Other, we review goodwill for impairment on at least an annual basis by applying a fair-value-based test. In evaluating the recoverability of the carrying value of goodwill, we must make assumptions regarding the fair value of our reporting units, as defined under FASB ASC Topic 350. Our reporting units that have goodwill balances remaining as of December 31, 2017 include AIU and CTU. Goodwill is evaluated by comparing the book value of a reporting unit, including goodwill, with its fair value, as determined by a combination of income and market approach valuation methodologies. If the book value of a reporting unit exceeds its fair value, goodwill of the reporting unit is considered to be impaired. The amount of impairment loss is equal to the excess of the book value of the goodwill over the fair value of goodwill.

In performing our annual review of goodwill balances for impairment, we estimate the fair value of each of our reporting units based on projected future operating results and cash flows, market assumptions and/or comparative market multiple methods. Determining fair value requires significant estimates and assumptions based on an evaluation of a number of factors, such as marketplace participants, relative market share, new student interest, student retention, future expansion or contraction expectations, amount and timing of future cash flows and the discount rate applied to the cash flows. Projected future operating results and cash flows used for valuation purposes do reflect improvements relative to recent historical periods with respect to, among other things, modest revenue growth and operating margins. Although we believe our projected future operating results and cash flows and related estimates regarding fair values are based on reasonable assumptions, historically projected operating results and cash flows have not always been achieved. The failure of one of our reporting units to achieve projected operating results and cash flows in the near term or long term may reduce the estimated fair value of the reporting unit below its carrying value and result in the recognition of a goodwill impairment charge. Significant management judgment is necessary to evaluate the impact of operating and macroeconomic changes and to estimate future cash flows. Assumptions used in our impairment evaluations, such as forecasted growth rates and our cost of capital, are based on the best available market information and are consistent with our internal forecasts and operating plans. In addition to cash flow estimates, our valuations are sensitive to the rate used to discount cash flows and future growth assumptions. These assumptions could be adversely impacted by certain of the risks discussed in Item 1A, “Risk Factors,” in this Annual Report on Form 10-K.

Intangible assets include indefinite lived assets. Indefinite-lived assets include our CTU trade name and accreditation rights, which are recorded at fair market value upon acquisition and subsequently reviewed on an annual basis for impairment. Accreditation rights represent the ability of our institutions to participate in Title IV Programs.

See Note 8 “Goodwill and Other Intangible Assets” for further discussion.

n. Impairment of Long-Lived Assets

We review property and equipment and other long-lived assets for impairment on an annual basis or whenever adverse events or changes in circumstances indicate that the carrying amounts of such assets may not be recoverable. If such adverse events or changes in circumstances occur, we will recognize an impairment loss if the undiscounted future cash flows expected to be generated by the assets are less than the carrying value of the related assets. The impairment loss would reduce the carrying value of the assets to their estimated fair value.

See Note 6 “Property and Equipment” for further discussion.

o. Contingencies

During the ordinary course of business, we are subject to various claims and contingencies. In accordance with FASB ASC Topic 450 – Contingencies, when we become aware of a claim or potential claim, we assess the likelihood of any related loss or exposure. The probability of whether an asset has been impaired or a liability has been incurred, and whether the amount of loss can be reasonably estimated, is analyzed, and if the loss contingency is both probable and reasonably estimable, then we accrue for costs, including direct costs incurred, associated with the loss contingency. If no accrual is made but the loss contingency is reasonably possible, we disclose the nature of the contingency and the related estimate of possible loss or range of loss if such an estimate can be made. For all matters that are currently being reviewed, we expense legal fees, including defense costs, as they are incurred. Loss contingencies include, but are not limited to, possible losses related to legal proceedings and regulatory compliance matters, and our assessment of exposure requires subjective assessment. Liabilities established to provide for contingencies are adjusted as further information develops, circumstances change, or contingencies are resolved. See Note 11 “Contingencies” for additional information.

p. Income Taxes

We are subject to the income tax laws of the U.S. and various state and local jurisdictions. These tax laws are complex and subject to interpretation. As a result, significant judgments and interpretations are required in determining our income tax provisions (benefits) and evaluating our uncertain tax positions.

We account for income taxes in accordance with FASB ASC Topic 740 – Income Taxes. Topic 740 requires the recognition of deferred income tax assets and liabilities based upon the income tax consequences of temporary differences between financial reporting and income tax reporting by applying enacted statutory income tax rates applicable to future years to differences between the financial statement carrying amounts and the income tax basis of existing assets and liabilities. Topic 740 also requires that deferred income tax assets be reduced by a valuation allowance if it is more likely than not that some portion of the deferred income tax asset will not be realized.

In assessing the need for a valuation allowance and/or release of a valuation allowance, we consider both positive and negative evidence related to the likelihood of realization of the deferred tax assets. Topic 740 provides that important factors in determining whether a deferred tax asset will be realized are whether there has been sufficient taxable income in recent years and whether sufficient taxable income is expected in future years in order to utilize the deferred tax asset. In evaluating the realizability of deferred income tax assets, we consider, among other things, historical levels of taxable income along with possible sources of future taxable income, which include: the expected timing of the reversals of existing temporary reporting differences, the existence of taxable income in prior carryback year(s), the expected impact of tax planning strategies that may be implemented to prevent the potential loss of future income tax benefits, expected future taxable income and earnings history exclusive of the loss that created the future deductible amount, coupled with evidence indicating the loss is not a continuing condition. Changes in, among other things, income tax legislation, statutory income tax rates, or future taxable income levels could materially impact our valuation of income tax assets and liabilities and could cause our income tax provision to vary significantly among financial reporting periods. If, based on the weight of available evidence, it is more likely than not the deferred tax assets will not be realized, we record a valuation allowance, or release all or a portion of the valuation allowance if it is more likely than not the deferred tax assets are expected to be realized. The weight given to the positive and negative evidence is commensurate with the extent to which the evidence may be objectively verified. A high degree of judgment is required to determine if, and the extent to which, valuation allowances should be recorded against deferred tax assets.

Topic 740 further clarifies the accounting for uncertainty in income taxes recognized in an entity’s financial statements and prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in an income tax return. Topic 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition.

q. Deferred Rent Obligations

Many of the real estate operating lease agreements to which we are party contain rent escalation clauses or lease incentives, such as rent abatements or tenant improvement allowances. Rent escalation clauses and lease incentives are taken into account in determining total rent expense to be recognized during the term of the lease, which begins on the date that we take control of the leased space. Renewal options are considered when evaluating the overall term of the lease. In accordance with FASB ASC Topic 840 – Leases, differences between periodic rent expense and periodic cash rental payments, caused primarily by the recognition of rent expense on a straight-line basis and tenant improvement allowances due or received from lessors, are recorded as deferred rent obligations on our consolidated balance sheets.

We record tenant improvement allowances as a deferred rent obligation on our consolidated balance sheets and as a cash inflow from operating activities on our consolidated statements of cash flows. We record capital expenditures funded by tenant improvement allowances received as a leasehold improvement on our consolidated balance sheets and as an investing activity within our consolidated statements of cash flows.

r. Share-Based Compensation

FASB ASC Topic 718 – Compensation-Stock Compensation requires that all share-based payments to employees and non-employee directors, including grants of stock options, shares or units of restricted stock, and the compensatory elements of employee stock purchase plans, be recognized in the financial statements based on the estimated fair value of the equity or liability instruments issued.

Our share-based awards are measured at fair value and recognized over the requisite service or performance period. The fair value of each stock option is estimated on the date of grant using the Black-Scholes option pricing model, based on the market price of the underlying common stock, expected life, expected stock price volatility and expected risk-free interest rate. Expected volatility is computed using a combination of historical volatility for a period equal to the expected term; the risk-free interest rates are based on the US Treasury yield curve, with a remaining term approximately equal to the expected term used in the option pricing model. The fair value of each restricted stock unit award is estimated based on the market price of the underlying common stock on the date of the grant. We estimate forfeitures at the time of grant and revise our estimate in subsequent periods if actual forfeitures differ from those estimates.

See Note 13 “Share-Based Compensation” for further discussion of our share-based compensation plans, the nature of share-based awards issued under the plans and our accounting for share-based awards.

s. Advertising Costs

Advertising costs are expensed as incurred. Advertising costs for continuing operations, which are included in general and administrative expenses on our consolidated statements of (loss) income and comprehensive (loss) income, were $136.1 million, $154.9 million and $220.5 million, for the years ended December 31, 2017, 2016 and 2015, respectively.