23t . rowe price group | annual report 2013 contractual obligations the following table presents a summary of our future obligations ( in millions ) under the terms of existing operating leases and other contractual cash purchase commitments at december 31 , 2013 . other purchase commitments include contractual amounts that will be due for the purchase of goods or services to be used in our operations and may be cancelable at earlier times than those indicated , under certain conditions that may involve termination fees . because these obligations are generally of a normal recurring nature , we expect that we will fund them from future cash flows from operations . the information presented does not include operating expenses or capital expenditures that will be committed in the normal course of operations in 2014 and future years . the information also excludes the $ 4.8 million of uncertain tax positions discussed in note 8 to our consolidated financial statements because it is not possible to estimate the time period in which a payment might be made to the tax authorities. .
as of december 31 , 2013 what percentage of total contractual obligations is due to noncancelable operating leases?
we also have outstanding commitments to fund additional contributions to investment partnerships totaling $ 40.7 million at december 31 , 2013 . the vast majority of these additional contributions will be made to investment partnerships in which we have an existing investment . in addition to such amounts , a percentage of prior distributions may be called under certain circumstances . in january 2014 , we renewed and extended our operating lease at our corporate headquarters in baltimore , maryland through 2027 . this lease agreement increases the above disclosed total noncancelable operating lease commitments by an additional $ 133.0 million , the vast majority of which will be paid after 2018 . critical accounting policies the preparation of financial statements often requires the selection of specific accounting methods and policies from among several acceptable alternatives . further , significant estimates and judgments may be required in selecting and applying those methods and policies in the recognition of the assets and liabilities in our consolidated balance sheets , the revenues and expenses in our consolidated statements of income , and the information that is contained in our significant accounting policies and notes to consolidated financial statements . making these estimates and judgments requires the analysis of information concerning events that may not yet be complete and of facts and circumstances that may change over time . accordingly , actual amounts or future results can differ materially from those estimates that we include currently in our consolidated financial statements , significant accounting policies , and notes . we present those significant accounting policies used in the preparation of our consolidated financial statements as an integral part of those statements within this 2013 annual report . in the following discussion , we highlight and explain further certain of those policies that are most critical to the preparation and understanding of our financial statements . other-than-temporary impairments of available-for-sale securities . we generally classify our investment holdings in sponsored funds as available-for-sale if we are not deemed to a have a controlling financial interest . at the end of each quarter , we mark the carrying amount of each investment holding to fair value and recognize an unrealized gain or loss as a component of comprehensive income within the consolidated statements of comprehensive income . we next review each individual security position that has an unrealized loss or impairment to determine if that impairment is other than temporary . in determining whether a mutual fund holding is other-than-temporarily impaired , we consider many factors , including the duration of time it has existed , the severity of the impairment , any subsequent changes in value , and our intent and ability to hold the security for a period of time sufficient for an anticipated recovery in fair value . subject to the other considerations noted above , we believe a fund holding with an unrealized loss that has persisted daily throughout the six months between quarter-ends is generally presumed to have an other-than-temporary impairment . we may also recognize an other-than-temporary loss of less than six months in our consolidated statements of income if the particular circumstances of the underlying investment do not warrant our belief that a near-term recovery is possible. .