ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
	Sep. 30, 2012
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION — Our company was founded in 1990 and is a Delaware corporation. ePlus inc. is sometimes referred to in this Quarterly Report on Form 10-Q as "we," "our," "us," "ourselves," or "ePlus." The unaudited condensed consolidated financial statements include the accounts of ePlus inc. and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated.
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS — Management has evaluated subsequent events after the balance sheet date through the date our financial statements are issued.
USE OF ESTIMATES	USE OF ESTIMATES — The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Significant items subject to such estimates and assumptions include estimates related to revenue recognition, residual values, vendor consideration, lease classification, goodwill and intangibles, reserves for credit losses, and the recognition and measurement of income tax assets and liabilities. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances. Actual results may differ from these estimates.
REVENUE RECOGNITION	REVENUE RECOGNITION–The majority of our revenues are derived from the following sources: sales of third party products, software, software assurance, maintenance and services; sales of our services and software; and financing revenues. For all these revenue sources, we determine whether we are the principal or agent in accordance with Codification Topic, Revenue Recognition, Subtopic Principal Agent Considerations. Our revenue recognition policies vary based on these revenue sources. For the sale of third party software assurance, maintenance and services we concluded that we are acting as an agent and recognize revenue for these transactions on a net basis at the date of sale, which is presented within sales of products and services in our unaudited condensed consolidated statements of operations. Gross billings for all products and services for the three months ended September 30, 2012 and September 30, 2011 were $318.8 million and $252.7 million, respectively. Gross billings for all products and services for the six months ended September 30, 2012 and September 30, 2011 were $597.6 million and $454.7 million, respectively.
CONCENTRATION OF RISK	CONCENTRATIONS OF RISK—Financial instruments that potentially subject us to concentrations of credit risk include cash and cash equivalents, short-term investments, accounts receivable, notes receivable and investments in direct financing and sales-type leases. Cash and cash equivalents and short-term investments are maintained principally with financial institutions in the United States, which have high credit ratings. Risk on accounts receivable, notes receivable and investments in direct financing and sales-type leases is reduced by the large number of diverse industries comprising our customer base and through the ongoing evaluation of collectability of our portfolio. Our credit risk is further mitigated through the underlying collateral and whether the asset is funded with recourse or non-recourse notes payable. A substantial portion of our sales of product and services are from sales of Cisco and Hewlett Packard products, which represented approximately 49.8% and 10.0%, and 51.6% and 10.1%, respectively, of our sales of product and services for the three and six months ended September 30, 2012, as compared to 46.1% and 17.2%, and 44.0% and 16.4%, respectively, of our sales of product and services for the three and six months ended September 30, 2011. Any changes in our vendors' ability to provide products could have a material adverse effect on our business, results of operations and financial condition.

Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction.

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Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.

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