Significant Accounting Policies (Policies)	6 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles of Consolidation	Principles of Consolidation. The consolidated financial statements include the accounts of Quality Systems, Inc. and its wholly-owned subsidiaries (collectively, the “Company”). Each of the terms “we,” “us,” or “our” as used herein refers collectively to the Company, unless otherwise stated. All intercompany accounts and transactions have been eliminated.
Segment Reporting, Policy [Policy Text Block]	Business Segments. We have determined that the Company operates in one segment as of June 30, 2017. We have made such determination by first identifying our Chief Executive Officer as our chief operating decision maker ("CODM") and considering the measures used by our CODM to allocate resources. Our CODM utilizes consolidated revenue and consolidated operating results to assess performance and make decisions about allocation of resources. Previously, through the end of fiscal year 2017, we operated under two reportable segments, consisting of the Software and Related Solutions segment and the RCM and Related Services segment, which was consistent with the disaggregated financial information used and evaluated by our CODM to assess performance and make decisions about the allocation of resources. However, as part of our reorganization efforts that were substantially complete as of the end of fiscal year 2017, our internal organizational structure whereby certain functions that formerly existed within each individual operating segment has continued to evolve. Our former Chief Operating Officer was previously responsible for leading the operations of our former RCM and Related Services business while our former Chief Client Officer led our client success organization, consisting of the Software and Related Solutions business and other functions, such as sales and marketing. Upon the resignation of our former Chief Operating Officer in April 2017 and concurrent appointment of our former Chief Client Officer as Chief Operating Officer, our entire portfolio of software and services were aligned under our new Chief Operating Officer in an effort to provide our clients with an even more simplified experience and more effectively deliver a consolidated financial solution to our clients, rather than components of a solution. As a result of such changes in our internal organization structure, the CODM now operates the Company as a single functional organization. The CODM measures company-wide performance by reviewing consolidated revenue and operating results and evaluates the impact of allocating resources to overall profit and margins on a consolidated basis.
Basis of Presentation	Basis of Presentation. The accompanying unaudited consolidated financial statements as of September 30, 2017 and for the three and six months ended September 30, 2017 have been prepared in accordance with the requirements of Quarterly Report on Form 10-Q and Article 10 of the Securities and Exchange Commission Regulation S-X and therefore do not include all information and notes which would be presented were such consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). These consolidated financial statements should be read in conjunction with the audited consolidated financial statements presented in our Annual Report on Form 10-K for the fiscal year ended March 31, 2017. In the opinion of management, the accompanying consolidated financial statements reflect all adjustments which are necessary for a fair statement of the results of operations and cash flows for the periods presented. The results of operations for such interim periods are not necessarily indicative of results of operations to be expected for the full year. References to amounts in the consolidated financial statement sections are in thousands, except shares and per share data, unless otherwise specified.
Recent Accounting Standards	Recent Accounting Standards. Recent accounting pronouncements requiring implementation in future periods are discussed below or in the notes, where applicable. In May 2017, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2017-09, Compensation–Stock Compensation (Topic 718): Scope of Modification Accounting ("ASU 2017-09"). ASU 2017-09 clarifies the changes to terms or conditions of a share-based payment award that require an entity to apply modification accounting. ASU 2017-09 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early application is permitted and prospective application is required. ASU 2017-09 is effective for us in the first quarter of fiscal 2019, and we currently do not expect the adoption of this new standard to have a material impact on our consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles–Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 removes the requirement to compare the implied fair value of goodwill with its carrying amount as part of Step two of the goodwill impairment test. Instead, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. ASU 2017-04 is effective prospectively for annual and interim periods beginning after December 15, 2019, and early adoption is permitted on goodwill impairment tests performed on testing dates after January 1, 2017. ASU 2017-04 is effective for us in the fourth quarter of fiscal 2020, and we currently do not expect the adoption of this new standard to have a material impact on our consolidated financial statements. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business (“ASU 2017-01”). ASU 2017-01 clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 is effective for annual periods beginning after December 15, 2017, including interim periods within those periods. Early adoption is permitted in two scenarios as identified in the new standard. ASU 2017-01 is effective for us in the first quarter of fiscal 2019, and we currently do not expect the adoption of this new standard to have a material impact on our consolidated financial statements. In November 2016, the FASB issued Accounting Standards Update ("ASU") 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (“ASU 2016-18”). ASU 2016-18 provides guidance on the classification of restricted cash and cash equivalents in the statement of cash flows. Although it does not provide a definition of restricted cash or restricted cash equivalents, it states that amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of period total amounts shown on the statement of cash flows. ASU 2016-18 is effective for interim and annual reporting periods beginning after December 15, 2017. Early adoption is permitted, including adoption in an interim period. ASU 2016-18 is effective for us in the first quarter of fiscal 2019, and we do not expect the adoption of this new standard to have a material impact on our consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, Income Taxes: Intra-Entity Transfers of Assets Other Than Inventory ("ASU 2016-16"). ASU 2016-16 requires the recognition of current and deferred income taxes for intra-entity asset transfers when the transaction occurs. ASU 2016-16 is effective for interim and annual reporting periods beginning after December 15, 2017. Early adoption is permitted. ASU 2016-16 is effective for us in the first quarter of fiscal 2019, and we are currently in the process of evaluating the potential impact of adoption of this updated authoritative guidance on our consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 is intended to add and clarify guidance on the classification of certain cash receipts and cash payments in the statement of cash flows to eliminate diversity in practice related to how such cash receipts and cash payments are presented and classified in the statement of cash flows. ASU 2016-15 is effective for interim and annual reporting periods beginning after December 15, 2017. Early adoption is permitted, including adoption in an interim period. ASU 2016-15 is effective for us in the first quarter of fiscal 2019, and we do not expect the adoption of this new standard to have a material impact on our consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting ("ASU 2016-09"). ASU 2016-09 simplifies the accounting for and reporting on share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for interim and annual reporting periods beginning after December 15, 2016, with early adoption permitted. The amendments in this update are to be applied differently upon adoption with certain amendments being applied prospectively, retrospectively and under a modified retrospective transition method. We adopted ASU 2016-09 in the first quarter of fiscal 2018. As permitted by ASU 2016-09, we have made an accounting policy election to account for forfeitures as they occur, which was adopted on a modified retrospective basis and resulted in a cumulative-effect adjustment of $0.1 million to retained earnings and additional paid-in capital as of April 1, 2017. ASU 2016-09 also eliminates additional paid-in capital pools and requires excess tax benefits and tax deficiencies to be recorded in the income statement when the awards vest or are settled, which was adopted on a prospective basis. The requirements to recognize previously unrecognized excess tax benefits on a modified retrospective basis did not have an impact on our consolidated financial statements. Upon adoption of ASU 2016-09, excess tax benefits and tax deficiencies are recognized in the income statement, and the tax effects of exercised or vested awards are treated as discrete items in the period they occur. The provisions of ASU 2016-09 could have an impact to our future income tax expense, including increased volatility in our effective tax rate on a quarter by quarter basis due to a number of factors, including fluctuations in the stock price and the timing of stock option exercises and vesting of restricted share awards. Additionally, ASU 2016-09 addresses presentation of excess tax benefits and deficiencies and employee taxes paid related to shares withheld for tax withholdings purposes on the statement of cash flows, including a requirement to present excess tax benefits and deficiencies as an operating activity in the same manner as other cash flows related to income taxes on the statement of cash flows, which will be adopted on a prospective basis, and presentation of employee taxes paid related to shares withheld for tax withholdings purposes as a financing activity, which is consistent with our current presentation and thus did not impact our consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”), which is intended to improve financial reporting about leasing transactions. The new guidance will require lessees to recognize on their balance sheets the assets and liabilities for the rights and obligations created by leases and to disclose key information about the leasing arrangements. ASU 2016-02 is effective for interim and annual periods beginning after December 15, 2018, with early adoption permitted. ASU 2016-02 is effective for us in the first quarter of fiscal 2020. We are currently in the process of evaluating the potential impact of adoption of this updated authoritative guidance on our consolidated financial statements. In May 2014, the FASB, along with the International Accounting Standards Board, issued ASU 2014-09, Revenue from Contracts with Customers ("ASU 2014-09"), which supersedes the revenue recognition requirements in ASC 605, Revenue Recognition. ASU 2014-09 provides enhancements to the quality and consistency of how revenue is reported while also improving comparability in the financial statements of companies reporting using International Financial Reporting Standards and GAAP. The core principle of this updated guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new standard also requires additional disclosure about revenue and provides improved guidance for multiple element arrangements. In July 2015 decision, the FASB issued ASU 2015-14, Deferral of Effective Date ("ASU 2015-14") to delay the effective date by one year. In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606) –Principal versus Agent Consideration ("ASU 2016-08"). In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606) - Identifying Performance Obligations and Licensing ("ASU 2016-10”). In May 2016, the FASB issued ASU 2016-11, Revenue from Contracts with Customers (Topic 606) and Derivatives and Hedging (Topic 815) – Rescission of SEC Guidance Because of ASU 2014-09 and 2014-16 ("ASU 2016-11") and ASU 2016-12, Revenue from Contracts with Customers (Topic 606) –Narrow Scope Improvements and Practical Expedients ("ASU 2016-12"). The new ASUs do not change the core principle of the guidance in Topic 606 (as amended by ASU 2014-09), but rather help to provide further interpretive clarifications on the new guidance in ASU 2014-09. ASU 2014-09, as amended by ASU 2015-14, is effective for us in the first quarter of fiscal 2019. Companies are permitted to adopt this new guidance following either a full retrospective or modified retrospective approach. We have completed our assessment of the potential impacts to our business processes, systems, and internal controls that could result from the implementation of the new revenue guidance. Based on our assessment, we currently believe that the impact on our consolidated financial statements could be material. We expect that revenue related to hardware, EDI, maintenance, and certain subscriptions would remain substantially unchanged, and we are the process of evaluating the impact of the new revenue guidance on our other revenue streams. Due to the complexity of our revenue recognition, a significant amount of work remains as we continue to evaluate all potential impacts of the new revenue guidance, and develop and implement the necessary changes to our current accounting systems, processes, and internal controls. Accordingly, our preliminary assessments are subject to change. We expect that the new revenue guidance will result in additional complexity to our revenue recognition, including the use of an increased amount of significant judgments and estimates, particularly as it relates to our RCM services revenue, as compared to our current revenue recognition. Additionally, certain incremental costs incurred to obtain contracts with customers, such as sales commissions, are within the scope of the new revenue guidance and are required to be capitalized and amortized to expense over the remaining performance periods of the contracts. Currently, our sales commission are capitalized and amortized to expense over the related period of revenue recognition. Although the amortization period of capitalized sales commissions may differ upon adoption of the new revenue guidance, we do not expect the adoption of this new revenue standard to have a material impact on our consolidated financial statements with respect to the capitalization and amortization of sales commissions. We currently expect to implement the new revenue guidance when it becomes effective for us in the first quarter of fiscal 2019 utilizing the modified retrospective transition method. Under this transition method, prior period amounts will not be adjusted and the cumulative effect from prior periods of applying the new revenue guidance will be recognized in our consolidated balance sheets as of the date of adoption, including an adjustment to retained earnings. We do not believe that any other recently issued, but not yet effective accounting standards, if adopted, would have a material impact on our consolidated financial statements.
Contingent Consideration Policy	The contingent consideration liability as of March 31, 2017 relates to the acquisition of HealthFusion, which was settled during the quarter ended June 30, 2017. The measurement period of the contingent consideration liability ended on December 31, 2016, and thus the actual revenue achievement rate was utilized to compute the ending contingent consideration liability as of March 31, 2017. Accordingly, the contingent consideration liability was reflected under a Level 2 valuation hierarchy because the fair value was determined based on other significant observable inputs.
Non-Recurring Fair Value Measurements	Non-Recurring Fair Value Measurements We have certain assets, including goodwill and other intangible assets, which are measured at fair value on a non-recurring basis and are adjusted to fair value only if an impairment charge is recognized. The categorization of the framework used to measure fair value of the assets is considered to be within the Level 3 valuation hierarchy due to the subjective nature of the unobservable inputs used. During the three and six months ended September 30, 2017, no adjustments were recorded.