Summary of Significant Accounting Policies | (2) Summary of Significant Accounting Policies (a) Principles of Consolidation The accompanying financial statements have been prepared on a consolidated basis and reflect the financial statements of Virtusa Corporation and all of its subsidiaries that are directly or indirectly more than 50% owned or controlled. When the Company does not have a controlling interest in an entity, but exerts a significant influence on the entity, the Company applies the equity method of accounting. The consolidated financial statements reflect the accounts of the Company and its direct and indirect subsidiaries, Virtusa Consulting Services Private Limited, Virtusa Software Services Private Limited, Virtusa Technologies (India) Private Limited and Polaris Consulting & Services Limited, Optimus Global Services Limited, each organized and located in India, Virtusa (Private) Limited, organized and located in Sri Lanka, Virtusa UK Limited, Polaris Consulting & Services Limited, organized and located in the United Kingdom, Virtusa Securities Corporation, a Massachusetts securities corporation, Polaris Consulting & Services Limited, organized and operating in the United States, Virtusa International, B.V., Polaris Software Lab B.V., organized and located in the Netherlands, Virtusa Hungary Kft., Polaris Consulting & Serviced, Kft., incorporated and located in Hungary, Virtusa Germany GmbH, Polaris Software Lab GmbH, organized and located in Germany, Virtusa Switzerland GmbH, Polaris Consulting & Services SA, organized and located in Switzerland, Virtusa Singapore Private Limited, Polaris Consulting & Services Pte Limited, organized and located in Singapore, Virtusa Malaysia Private Limited Company, Polaris Consulting & Services, SND BHD, located in Malaysia, Virtusa Austria GmbH, organized and located in Austria, Virtusa Philippines Inc., organized and located in the Philippines, TradeTech Consulting Scandinavia AB located in Sweden and Virtusa Canada, Inc., a corporation organized under the laws of British Columbia, Canada. Polaris Consulting & Services Inc, organized under the laws of Ontario, Canada. Polaris Consulting & Services Ireland Limited, organized and located in Ireland, Polaris Consulting & Services Japan K.K., organized and located in Japan, Polaris Consulting & Services Pty Ltd., organized and operating in Australia and New Zealand, Polaris Consulting & Services FZ-LLC, organized and located in Dubai, Polaris Consulting & Services Limited, organized and located in Hong Kong, Polaris Software Lab (Shanghai) Limited, organized and located in China. All intercompany transactions and balances have been eliminated in consolidation. (b) Use of Estimates The preparation of financial statements in accordance with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, including the recoverability of tangible assets, disclosure of contingent assets and liabilities as of the date of the financial statements, and the reported amounts of revenue and expenses during the reported period. Management re- evaluates these estimates on an ongoing basis. The most significant estimates relate to the recognition of revenue and profits based on the percentage of completion method of accounting for fixed-price contracts, share-based compensation, income taxes, including reserves for uncertain tax positions, deferred taxes and liabilities, intangible assets, contingent consideration and valuation of financial instruments including derivative contracts and investments. Management bases its estimates on historical experience and on various other factors and assumptions that are believed to be reasonable under the circumstances. The actual amounts may vary from the estimates used in the preparation of the accompanying consolidated financial statements. (c) Foreign Currency Translation The functional currencies of the Company's non-U.S. subsidiaries are the local currency of the country in which the subsidiary operates except for Hungary, which operates in the euro and certain Netherlands entities, which operate in the U.S. dollar. Operating and capital expenditures of the Company's subsidiaries located in India, Sri Lanka, the Netherlands, Australia, Canada, Singapore, Malaysia, the Philippines, Germany, Austria, Sweden and the United Kingdom, are denominated in their local currency which is the currency most compatible with their expected economic results. India and Sri Lanka local expenditures form the underlying basis for intercompany transactions which are subsequently conducted in both U.S. dollars and U.K. pounds sterling. U.K. client sales contracts are primarily conducted in U.K. pounds sterling. All transactions and account balances are recorded in the functional currency. The Company translates the value of these non-U.S. subsidiaries' local currency denominated assets and liabilities into U.S. dollars at the rates in effect at the balance sheet date. Resulting translation adjustments are recorded in stockholders' equity as a component of accumulated other comprehensive income (loss). The local currency denominated statement of income amounts are translated into U.S. dollars using the average exchange rates in effect during the period. Realized foreign currency transaction gains and losses are included in the consolidated statements of income. The Company's non-U.S. subsidiaries do not operate in "highly inflationary" countries. (d) Derivative Instruments and Hedging Activities The Company enters into forward foreign exchange contracts to mitigate the risk of changes in foreign exchange rates on intercompany transactions and forecasted transactions denominated in foreign currencies. The Company designates derivative contracts as cash flow hedges if they satisfy the criteria for hedge accounting. Changes in fair values of derivatives designated as cash flow hedges are deferred and recorded as a component of accumulated other comprehensive income, net of taxes, until the hedged transactions occur and are then recognized in the consolidated statements of income. Changes in fair value of derivatives not designated as hedging instruments and the ineffective portion of derivatives designated as cash flow hedges are recognized immediately in the consolidated statements of income. With respect to derivatives designated as cash flow hedges, the Company formally documents all relationships between hedging instruments and hedged items, as well as its risk management objectives and strategy for undertaking various hedge transactions. The Company also formally assesses both at the inception of the hedge and on an ongoing basis, whether each derivative will be highly effective in offsetting changes in fair values or cash flows of the hedged item. If the Company determines that a derivative or a portion thereof is not highly effective as a hedge, or if a derivative ceases to qualify for hedge accounting, the Company prospectively discontinues hedge accounting with respect to that derivative. (e) Cash and Cash Equivalents and Restricted Cash The Company considers all highly liquid investments with an initial maturity of three months or less from the date of purchase to be cash equivalents. At March 31, 2016, cash equivalents consisted of money market instruments and certificates of deposit. The Company had short-term and long-term restricted cash totaling $93,940 and $112 at March 31, 2016 and 2015, respectively. Restricted cash includes escrow deposits related to the mandatory offering for 26% of the outstanding shares of Polaris as required under India takeover rules, escrow deposits related to acquisitions and restricted deposits with banks to secure the import of computer and other equipment, bank guarantees associated with the purchase of property and equipment of the Company's facilities in India. (f) Investment Securities The Company classifies all debt securities as "available for sale". These securities are classified as short-term investments and long-term investments on the consolidated balance sheet and are carried at fair market value. Any unrealized gains and losses on available for sale securities are reported in accumulated other comprehensive income, net of tax, as a separate component of stockholders' equity unless the decline in value is deemed to be other-than-temporary, in which case, investments are written down to fair value and the loss is charged to the consolidated statement of income. Any realized gains and losses on trading securities are charged to the consolidated statement of income. The Company determines the cost of the securities sold based on the specific identification method. The Company conducts a periodic review and evaluation of its investment securities to determine if the decline in fair value of any security is deemed to be other-than-temporary. Other-than-temporary impairment losses are recognized on securities when: (i) the holder has an intention to sell the security; (ii) it is more likely than not that the security will be required to be sold prior to recovery; or (iii) the holder does not expect to recover the entire amortized cost basis of the security. Other-than- temporary losses are reflected in earnings as a charge against gain on sale of investments to the extent the impairment is related to credit losses. The amount of the impairment related to other factors is recognized in other comprehensive income. The Company has no intention to sell any securities in an unrealized loss position at March 31, 2016 nor is it more likely than not that the Company would be required to sell such securities prior to the recovery of the unrealized losses. At March 31, 2016, the Company believes that all impairments of investment securities are temporary in nature. (g) Goodwill and Other Intangible Assets The Company accounts for its business combinations under the acquisition method of accounting. The Company allocates the cost of an acquired entity to the assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. The excess of the purchase price for acquisitions over the fair value of the net assets acquired, including other intangible assets, is recorded as goodwill. Goodwill is not amortized but is tested for impairment at the reporting unit level, defined as the Company level, at least annually in the fourth quarter of each fiscal year or more frequently when events or circumstances occur that indicate that it is more likely than not that an impairment has occurred. In assessing goodwill for impairment, an entity has the option to assess qualitative factors to determine whether events or circumstances indicate that it is not more likely than not that fair value of a reporting unit is less than its carrying amount. If this is the case, then performing the quantitative two-step goodwill impairment test is unnecessary. An entity can choose not to perform a qualitative assessment for any or all of its reporting units, and proceed directly to the use of the two-step impairment test. The two-step process begins with an estimation of the fair value of a reporting unit. Goodwill impairment exists when a reporting unit's carrying value of goodwill exceeds its implied fair value. Significant judgment is applied when goodwill is assessed for impairment. For the Company's goodwill impairment analysis, the Company operates under one reporting unit. Any impairment would be measured based upon the fair value of the related assets. In performing the first step of the goodwill impairment testing and measurement process, the Company compares its entity-wide estimated fair value to net book value to identify potential impairment. Management estimates the entity-wide fair value utilizing the Company's market capitalization, plus an appropriate control premium. Market capitalization is determined by multiplying the shares outstanding on the assessment date by the market price of the Company's common stock. If the market capitalization is not sufficiently in excess of the Company's book value, the Company will calculate the control premium which considers appropriate industry, market and other pertinent factors. If the fair value of the reporting unit is less than the book value, the second step is performed to determine if goodwill is impaired. If the Company determines through the impairment evaluation process that goodwill has been impaired, an impairment charge would be recorded in the consolidated statement of income. The Company completed the annual impairment test required during the fourth quarter of the fiscal year ended March 31, 2016 and determined that there was no impairment. The Company continues to closely monitor its market capitalization. If the Company's market capitalization, plus an estimated control premium, is below its carrying value for a period considered to be other-than-temporary, it is possible that the Company may be required to record an impairment of goodwill either as a result of the annual assessment that the Company conducts in the fourth quarter of each fiscal year, or in a future quarter if an indication of potential impairment is evident. The estimated fair value of the reporting unit on the assessment date significantly exceeded the carrying book value. Other intangible assets acquired in a business combination are recognized at fair value using generally accepted valuation methods appropriate for the type of intangible asset and reported separately from goodwill. Intangible assets with definite lives are amortized over the estimated useful lives and are tested for impairment when events or circumstances occur that indicate that it is more likely than not that an impairment has occurred. The Company tests other intangible assets with definite lives for impairment by comparing the carrying amount to the sum of the net undiscounted cash flows expected to be generated by the asset whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. If the carrying amount of the asset exceeds its net undiscounted cash flows, then an impairment loss is recognized for the amount by which the carrying amount exceeds its fair value. (h) Fair Value of Financial Instruments At March 31, 2016 and 2015, the carrying amounts of certain of the Company's financial instruments, including cash and cash equivalents, accounts receivable, unbilled accounts receivable, restricted cash, accounts payable, accrued employee compensation and benefits, other accrued expenses and long-term debt, approximate their fair values due to the nature of the items. See note 8 for a discussion of the fair value of the Company's other financial instruments. (i) Concentration of Credit Risk and Significant Customers Financial instruments which potentially expose the Company to concentrations of credit risk are primarily comprised of cash and cash equivalents, investments, derivatives, accounts receivable and unbilled accounts receivable. The Company places its cash, investments and derivatives in highly-rated financial institutions. The Company adheres to a formal investment policy with the primary objective of preservation of principal, which contains credit rating minimums and diversification requirements. Management believes its credit policies reflect normal industry terms and business risk. The Company does not anticipate non-performance by the counterparties and, accordingly, does not require collateral. At March 31, 2016, one client accounted for 12%, of gross accounts receivable. At March 31, 2015, two clients accounted for 13% and 10% respectively, of gross accounts receivable. Revenue from significant clients as a percentage of the Company's consolidated revenue was as follows: Year Ended March 31, 2016 2015 2014 Customer A % % % Customer B % % % (j) Property and Equipment Property and equipment are recorded at cost and depreciated over their estimated useful lives using the straight-line method. Leasehold improvements are amortized over the shorter of their lease term or the estimated useful life of the related asset. Upon retirement or sale, the cost of assets disposed of and the related accumulated depreciation are removed from the accounts and any resulting gain or loss is credited or charged to income. Repair and maintenance costs are expensed as incurred. (k) Long-Lived Assets The Company reviews the carrying value of its long-lived assets or asset groups with definite useful lives to be held and used for impairment whenever events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. Recoverability of these assets is measured by a comparison of the carrying value of an asset to the future net undiscounted cash flows directly associated with the asset. If assets are considered to be impaired, the impairment recognized is the amount by which the carrying value exceeds the fair value of the asset. The Company uses a discounted cash flow approach or other methods, if appropriate, to assess fair value. Long-lived assets to be disposed of by sale are reported at the lower of carrying value or fair value less cost to sell and depreciation is ceased. Long-lived assets to be disposed of other than by sale are considered to be held and used until disposal. (l) Internally-Developed Software The Company capitalizes costs incurred during the application development stage, which include costs to design the software configuration and interfaces, coding, installation and testing. Costs incurred during the preliminary project stage, along with post-implementation stages of internal use computer software, are expensed as incurred. Capitalized development costs are typically amortized over the estimated life of the software, typically three to ten years, using the straight line method, beginning with the date that an asset is ready for its intended use. At March 31, 2016 and 2015, capitalized software development costs, which include software development work in progress, were approximately $8,020 and $7,302, respectively. These costs were recorded in property and equipment. For the fiscal years ended March 31, 2016, 2015 and 2014, amortization of capitalized software development costs amounted to approximately $556, $706 and $733, respectively. (m) Income Taxes Income taxes are accounted for using the asset and liability method whereby deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. The calculation of the Company's tax liabilities involves dealing with uncertainties in the application of complex tax regulations in multiple jurisdictions. The Company records liabilities for estimated tax obligations in the United States and other tax jurisdictions in which it has operations (see note 13). (n) Revenue Recognition The Company derives its revenue from a variety of IT consulting, technology implementation and application outsourcing services. Contracts for these services have different terms and conditions based on the scope, deliverables, and complexity of the engagement which require management to make judgments and estimates in determining the overall cost to the customer. Fees for these contracts may be in the form of time and materials or fixed price arrangements. Revenue is recognized as work is performed and amounts are earned. The Company considers amounts to be earned once evidence of an arrangement has been obtained, services are delivered, fees are fixed or determinable, and collectability is reasonably assured. Volume discounts are recorded as a reduction of revenue over the contractual period as services are performed. Revenue on time and material contracts is recognized as the services are performed and amounts are earned. Revenue from fixed price contracts related to complex design, development and customization is accounted for under the percentage of completion method. Under the percentage of completion method, management estimates the percentage of completion based upon efforts incurred as a percentage of the total estimated efforts for the specified engagement. When total cost estimates exceed revenue, the Company accrues for the estimated losses immediately. The use of the percentage of completion method requires significant judgment relative to estimating total contract revenue and efforts, including assumptions relative to the length of time to complete the project, the nature and complexity of the work to be performed, and anticipated changes in other engagement related costs. The Company's analysis of these contracts also contemplates whether contracts should be combined or segmented. The Company combines closely related contracts when all the applicable criteria under U.S. GAAP are met. Similarly, the Company may segment a project, which may consist of a single contract or a group of contracts, with varying rates of profitability, only if all the applicable criteria under U.S. GAAP are met. Estimates of total contract revenue and efforts are continuously monitored during the term of the contract and are subject to revision as the contract progresses. When revisions in estimated contract revenue and efforts are determined, such adjustments are recorded in the period in which they are first identified. Revenue from fixed-price contracts related to consulting or other IT services is accounted for using a proportional performance method. Performance is generally measured based upon the efforts incurred to date in relation to the total estimated efforts to the completion of the contract. The cumulative impact of any change in estimates of the contract revenue is reflected in the period in which the changes become known. Revenue from fixed-price applications management, maintenance or support engagements is recognized as earned which generally results in straight-line revenue recognition as services are performed continuously over the term of the engagement. The Company may enter into arrangements that consist of multiple elements and in these types of arrangements the transaction price is allocated to the individual units of accounting at the inception of the arrangement based on the relative selling price. The Company uses a hierarchy to determine the selling prices to be used for allocating revenue: (i) vendor-specific objective, evidence of fair value (VSOE), (ii) third-party evidence of selling price (TPE), and (iii) best estimate of the selling price (ESP). The Company may enter into hosting arrangements where revenue is recognized as the service is delivered, generally on a straight-line basis, over the contractual period of performance. In these types of arrangements the Company considers the rights provided to the customer in determining whether the arrangement includes the sale of a software license. Differences between the timing of billings and the recognition of revenue based on various methods of accounting are recorded as unbilled revenue or deferred revenue. Revenue includes reimbursements of travel and out-of-pocket expenses, with equivalent amounts of expense recorded in costs of revenue, of $14,142, $10,877 and $5,921 for the fiscal years ended March 31, 2016, 2015 and 2014, respectively. Any tax assessed by a governmental authority that is incurred as a result of a revenue transaction (e.g. sales tax) is excluded from revenue and reported on a net basis. (o) Costs of Revenue and Operating Expenses Costs of revenue consist principally of salaries, employee benefits and stock compensation expense, reimbursable and non-reimbursable travel costs, subcontractor fees, and immigration related expenses for IT professionals. Selling and marketing expenses are charged to operating expenses as incurred. Selling and marketing expenses are those expenses associated with promoting and selling the Company's services and include such items as sales and marketing personnel salaries, stock compensation expense and related fringe benefits, commissions, travel, and the cost of advertising and other promotional activities. Advertising and promotional expenses incurred were approximately $316, $430 and $255 for the fiscal years ended March 31, 2016, 2015 and 2014, respectively. General and administrative expenses include other operating items such as officers' and administrative personnel salaries, stock compensation expense and related fringe benefits, legal and audit expenses, public company related expenses, insurance, facility costs, provision for doubtful accounts, depreciation and amortization, including amortization of purchased intangibles and operating lease expenses. (p) Share-Based Compensation Share-based compensation cost is determined by estimating the fair value at the grant date of the Company's common stock using the Black-Scholes option pricing model, and expensing the total compensation cost on a straight line basis (net of estimated forfeitures) over the requisite employee service period. The allocation of total share-based compensation expense between costs of revenue and selling, general and administrative expenses were as follows: Year Ended March 31, 2016 2015 2014 Costs of revenue $ $ $ Selling, general and administrative expenses Total share-based compensation expense $ $ $ The fair value of each stock option is estimated on the date of grant using the Black-Scholes option pricing valuation model with the following assumptions: Year Ended March 31, Weighted Average Fair Value Options Pricing Model Assumptions 2016(1) 2015 2014 Risk-free interest rate — % % Expected term (in years) — Anticipated common stock volatility — % % Expected dividend yield — % % (1) There were no options granted during the fiscal year ended March 31, 2016. The risk-free interest rate assumptions are based on the interpolation of various U.S. Treasury bill rates in effect during the month in which stock option awards are granted. For the fiscal years ended March 31, 2016, 2015 and 2014, the Company's volatility assumption is based on the historical volatility rates of the Company's common stock from exchange traded shares over periods commensurate with the expected term of each grant The expected term of employee share-based awards represents the weighted average period of time that awards are expected to remain outstanding. The determination of the expected term of share-based awards assumes that employees' behavior is a function of the awards vested, contractual lives, and the extent to which the award is in the money. Accordingly, for the fiscal years ended March 31, 2016, 2015 and 2014, the expected term of our options is based on historical employee exercise patterns. The fair value of restricted awards and deferred stock awards is determined based on the number of stock awards granted and the quoted price of our stock at date of grant. As of March 31, 2016, there was $25,545 of total unrecognized compensation cost related to unvested stock options, restricted stock awards, deferred stock awards and restricted stock units granted under the Company's Amended and Restated 2000 Option Plan, the Company's 2007 Stock Option and Incentive Plan and the Company's 2015 Stock Option and Incentive Plan (see note 12 for a more complete description of these plans). The unrecognized compensation cost is expected to be recognized over a remaining weighted average period of 1.71 years. (q) Allowance for Doubtful Accounts The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of clients to make required payments. The allowance for doubtful accounts is determined by evaluating the relative credit worthiness of each client, historical collections experience and other information, including the aging of the receivables. We evaluate the collectability of our accounts receivables on an on-going basis and write-off accounts when they are deemed to be uncollectible. (r) Unbilled Accounts Receivable Unbilled accounts receivable represent revenue on contracts to be billed, in subsequent periods, as per the terms of the related contracts. (s) Recent accounting pronouncements In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard is effective for the Company on April 1, 2018. Early application is permitted but not before periods beginning on or after January 1, 2017. In March, April and May 2016, the FASB issued updates to the new revenue standard to clarify the implementation guidance on principal versus agent considerations for reporting revenue gross versus net, identifying performance obligations, accounting for licenses of intellectual property, transition, contract modifications, collectability, non-cash consideration and presentation of sales and other similar taxes with the same effective date. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. In June 2014, the FASB issued ASU No. 2014-12—"Stock Compensation—Accounting for Share-Based Payments In some cases, the terms of an award may provide that a performance target that affects vesting could be achieved after an employee completes the requisite service period. That is, the employee would be eligible to vest in the award regardless of whether the employee is rendering service on the date the performance target is achieved. A performance target that affects vesting and that could be achieved after an employee's requisite service period shall be accounted for as a performance condition. As such, the performance target shall not be reflected in estimating the fair value of the award at the grant date. Compensation cost shall be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the period(s) for which the requisite service already has been rendered. If the performance target becomes probable of being achieved before the end of the requisite service period, the remaining unrecognized compensation cost for which requisite service has not yet been rendered shall be recognized prospectively over the remaining requisite service period. The total amount of compensation cost recognized during and after the requisite service period shall reflect the number of awards that are expected to vest and shall be adjusted to reflect those awards that ultimately vest. The requisite service period ends when the employee can cease rendering service and still be eligible to vest in the award if the performance target is achieved. As indicated in the definition of vest, the stated vesting period (which includes the period in which the performance target could be achieved) may differ from the requisite service period. The ASU is effective for annual and interim periods for fiscal years beginning on or after December 15, 2015. Entities can apply the amendment either a) prospectively to all awards granted or modified after the effective date or b) retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter. The ASU does not have an impact on the consolidated financial statements. In April 2015, the FASB issued ASU 2015-03, "Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs". This update requires debt issuance costs related to a recognized debt liability to be presented in the balance sheet as a direct deduction from the carrying value of that debt liability, consistent with debt discounts. The Company adopted this guidance in the current fiscal year and recorded debt issuance cost as a direct deduction from the carrying value of that debt. In September 2015, the FASB issued ASU 2015-16, which eliminates the requirement for an acquirer to retrospectively adjust the financial statements for meas |