Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2013
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Revenue Recognition — The Company derives revenue principally through fixed commitment contracts under which the Company provides customers various services, including access to the cloud-based Intralinks platform, which includes Intralinks exchanges, as well as related customer support and other services. The Company's customers do not have a contractual right, or the ability, to take possession of the Intralinks software at any time during the hosting period, or to contract with an unrelated third party to host the Intralinks software. Therefore, revenue recognition for the Company's services is not accounted for under specific guidance of the Financial Accounting Standards Board ("FASB") on software revenue recognition. The Company recognizes revenue for its services ratably over the related service period, provided that there is persuasive evidence of an arrangement; the service has been provided to the customer; collection is reasonably assured; the amount of fees to be paid by the customer is fixed or determinable; and the Company has no significant remaining obligation at the completion of the contracted term. In circumstances where the Company has a significant remaining obligation after completion of the initial contract term, revenue is recognized ratably over the extended service period. The Company's contracts do not contain general rights of return. Certain of the Company's contracts contain customer acceptance clauses, for which revenue is deferred until acceptance occurs. From time to time, the Company agrees to sales concessions with its customers for which a reserve is estimated based on historical patterns of actual credits issued. Expenses associated with maintaining this reserve are recorded as a reduction to revenue, which the Company believes represents an accurate reflection of the underlying business activity for each reporting period and is in line with the requirement that all revenue recognized during the period is earned and realizable. The Company offers services to customers through single-element and multiple-element arrangements, some of which contain offerings for optional services, including document scanning, data archiving and other professional services. In accordance with the FASB's guidance on multiple-deliverable arrangements, the Company has evaluated the deliverables in its arrangements to determine whether they represent separate units of accounting and, specifically, whether the deliverables have value to the Company's customers on a standalone basis. The Company has determined that the services delivered to customers under its existing arrangements generally represent a single unit of accounting. Revenue for optional services is recognized as delivered, or as completed, provided that the general revenue recognition criteria described above are met. The Company continues to evaluate the nature of the services offered to customers under its fixed commitment contracts, as well as its pricing practices, to determine if a change in policy regarding multiple-element arrangements and related disclosures is warranted in future periods. Additionally, certain contracts contain provisions for set-up and implementation services relating to the customer's use of the Intralinks platform. The Company believes that these set-up and implementation services provide value to the customer over the entire period that the exchange is active, including renewal periods, and therefore the revenue related to these set-up types of services are recognized over the longer of the contract term or the estimated relationship life. The Company will continue to evaluate from time to time the length of the amortization period of the revenue related to set up and implementation fees to determine if a change in estimate is warranted in future periods. During the nine months ended September 30, 2013, there were no material changes to the Company's significant accounting policies from those disclosed in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2012. Recent Accounting Pronouncements In June 2013, the FASB ratified accounting guidance proposed by the Emerging Issues Task Force that requires entities to present an unrecognized tax benefit net with certain deferred tax assets when specific requirements are met. The amendments in this updated guidance are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The Company is currently evaluating the effect this guidance will have on its consolidated balance sheet.

Summary of Significant Accounting Policies

Revenue Recognition — The Company derives revenue principally through fixed commitment contracts under which the Company provides customers various services, including access to the cloud-based Intralinks platform, which includes Intralinks exchanges, as well as related customer support and other services. The Company's customers do not have a contractual right, or the ability, to take possession of the Intralinks software at any time during the hosting period, or to contract with an unrelated third party to host the Intralinks software. Therefore, revenue recognition for the Company's services is not accounted for under specific guidance of the Financial Accounting Standards Board ("FASB") on software revenue recognition. The Company recognizes revenue for its services ratably over the related service period, provided that there is persuasive evidence of an arrangement; the service has been provided to the customer; collection is reasonably assured; the amount of fees to be paid by the customer is fixed or determinable; and the Company has no significant remaining obligation at the completion of the contracted term. In circumstances where the Company has a significant remaining obligation after completion of the initial contract term, revenue is recognized ratably over the extended service period. The Company's contracts do not contain general rights of return. Certain of the Company's contracts contain customer acceptance clauses, for which revenue is deferred until acceptance occurs.

From time to time, the Company agrees to sales concessions with its customers for which a reserve is estimated based on historical patterns of actual credits issued. Expenses associated with maintaining this reserve are recorded as a reduction to revenue, which the Company believes represents an accurate reflection of the underlying business activity for each reporting period and is in line with the requirement that all revenue recognized during the period is earned and realizable.

The Company offers services to customers through single-element and multiple-element arrangements, some of which contain offerings for optional services, including document scanning, data archiving and other professional services. In accordance with the FASB's guidance on multiple-deliverable arrangements, the Company has evaluated the deliverables in its arrangements to determine whether they represent separate units of accounting and, specifically, whether the deliverables have value to the Company's customers on a standalone basis. The Company has determined that the services delivered to customers under its existing arrangements generally represent a single unit of accounting. Revenue for optional services is recognized as delivered, or as completed, provided that the general revenue recognition criteria described above are met. The Company continues to evaluate the nature of the services offered to customers under its fixed commitment contracts, as well as its pricing practices, to determine if a change in policy regarding multiple-element arrangements and related disclosures is warranted in future periods.

Additionally, certain contracts contain provisions for set-up and implementation services relating to the customer's use of the Intralinks platform. The Company believes that these set-up and implementation services provide value to the customer over the entire period that the exchange is active, including renewal periods, and therefore the revenue related to these set-up types of services are recognized over the longer of the contract term or the estimated relationship life. The Company will continue to evaluate from time to time the length of the amortization period of the revenue related to set up and implementation fees to determine if a change in estimate is warranted in future periods.

During the nine months ended September 30, 2013, there were no material changes to the Company's significant accounting policies from those disclosed in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2012.

Recent Accounting Pronouncements

In June 2013, the FASB ratified accounting guidance proposed by the Emerging Issues Task Force that requires entities to present an unrecognized tax benefit net with certain deferred tax assets when specific requirements are met. The amendments in this updated guidance are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The Company is currently evaluating the effect this guidance will have on its consolidated balance sheet.