ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
Dec. 31, 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.
RECLASSIFICATIONS	RECLASSIFICATIONS — We have reclassified prior period amounts for deferred costs from other assets and deferred revenues from accrued expenses and other liabilities to conform to current period presentation.
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 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 December 31, 2012 and December 31, 2011 were $277.8 million and $260.9 million, respectively. Gross billings for all products and services for the nine months ended December 31, 2012 and December 31, 2011 were $875.3 million and $715.5 million, respectively.
DEFERRED COSTS AND DEFERRED REVENUES	DEFERRED COSTS AND DEFERRED REVENUES – Deferred costs includes internal and third party costs associated with deferred revenue arrangements. Deferred revenues relate to services performed by us for our customers, as well as third party licenses with software assurance, which we defer the entire arrangement over the term of the software assurance. At December 31, 2012, total deferred costs and deferred revenue were $41.6 million and $51.3 million, respectively, compared to $9.4 million and $15.9 million, respectively, at March 31, 2012. The increase is due to a number of advanced integration projects that were in process and deferred as of December 31, 2012 as they were not scheduled to be completed until after December 31, 2012.
CONCENTRATIONS 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 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 42.7% and 12.6%, and 48.7% and 10.9%, respectively, of our sales of product and services for the three and nine months ended December 31, 2012, as compared to 40.4% and 11.8%, and 42.6% and 14.5%, respectively, of our sales of product and services for the three and nine months ended December 31, 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.
RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS	RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS — In June 2011, the Financial Accounting Standard Board ("FASB") issued Accounting Standards Update ("ASU") 2011-12, Comprehensive Income ("ASU 2011-12"), which amended existing guidance by allowing only two options for presenting the components of net income and other comprehensive income: (1) in a single continuous financial statement, statement of comprehensive income or (2) in two separate but consecutive financial statements, consisting of an income statement followed by a separate statement of other comprehensive income. ASU 2011-12 requires retrospective application, and it is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011, with early adoption permitted. We adopted this amendment on April 1, 2012 and are presenting our components of net income and other comprehensive income in two separate but consecutive financial statements.

ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Dec. 31, 2012

ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]

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.

RECLASSIFICATIONS

RECLASSIFICATIONS — We have reclassified prior period amounts for deferred costs from other assets and deferred revenues from accrued expenses and other liabilities to conform to current period presentation.

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 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 December 31, 2012 and December 31, 2011 were $277.8 million and $260.9 million, respectively. Gross billings for all products and services for the nine months ended December 31, 2012 and December 31, 2011 were $875.3 million and $715.5 million, respectively.

DEFERRED COSTS AND DEFERRED REVENUES

DEFERRED COSTS AND DEFERRED REVENUES – Deferred costs includes internal and third party costs associated with deferred revenue arrangements. Deferred revenues relate to services performed by us for our customers, as well as third party licenses with software assurance, which we defer the entire arrangement over the term of the software assurance. At December 31, 2012, total deferred costs and deferred revenue were $41.6 million and $51.3 million, respectively, compared to $9.4 million and $15.9 million, respectively, at March 31, 2012. The increase is due to a number of advanced integration projects that were in process and deferred as of December 31, 2012 as they were not scheduled to be completed until after December 31, 2012.

CONCENTRATIONS 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 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 42.7% and 12.6%, and 48.7% and 10.9%, respectively, of our sales of product and services for the three and nine months ended December 31, 2012, as compared to 40.4% and 11.8%, and 42.6% and 14.5%, respectively, of our sales of product and services for the three and nine months ended December 31, 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.

RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS

RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS — In June 2011, the Financial Accounting Standard Board ("FASB") issued Accounting Standards Update ("ASU") 2011-12, Comprehensive Income ("ASU 2011-12"), which amended existing guidance by allowing only two options for presenting the components of net income and other comprehensive income: (1) in a single continuous financial statement, statement of comprehensive income or (2) in two separate but consecutive financial statements, consisting of an income statement followed by a separate statement of other comprehensive income. ASU 2011-12 requires retrospective application, and it is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011, with early adoption permitted. We adopted this amendment on April 1, 2012 and are presenting our components of net income and other comprehensive income in two separate but consecutive financial statements.

- Definition

Disclosure of accounting policy for credit risk.

+ References

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+ Details

- Definition

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.

+ References+ Details

- Definition

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

+ References+ Details