b'In February 2019, Kosmos and BP signed Carry Advance Agreements with the national oilcompanies of Mauritania and Senegal which obligate us separately to finance the respective national oilcompanys share of certain development costs. Kosmos total share for the two agreements combined isup to $239.7 million, which is to be repaid through the national oil companies share of futurerevenues.The following table presents maturities by expected debt maturity dates, the weighted-averageinterest rates expected to be paid on the Facility given current contractual terms and market conditions,and the debts estimated fair value. Weighted-average interest rates are based on implied forward ratesin the yield curve at the reporting date. This table does not take into account amortization of deferredfinancing costs.Asset(Liability)Years Ending December 31, Fair Value atDecember 31,2019 2020 2021 2022 2023 Thereafter 2018(In thousands, except percentages)Fixed rate debt:Senior Notes . . . . . . . . . . . . . $$$525,000 $$$$ (525,026)Fixed interest rate . . . . . . . . . . 7.88% 7.88% 7.88% Variable rate debt:Facility(1) . . . . . . . . . . . . . . . $$$160,600 $289,100 $305,100 $570,200 $(1,325,000)Corporate Revolver . . . . . . . . .325,000 (325,000)Weighted average interest rate(2) 6.14% 5.99% 5.97% 6.03% 6.14% 6.82%(1) The amounts included in the table represent principal maturities only. The scheduled maturities of debt are basedon the level of borrowings and the available borrowing base as of December 31, 2018. Any increases or decreases inthe level of borrowings or increases or decreases in the available borrowing base would impact the scheduledmaturities of debt during the next five years and thereafter.(2) Based on outstanding borrowings as noted in (1) above and the LIBOR yield curves plus applicable margin at thereporting date. Excludes commitment fees related to the Facility and Corporate Revolver.Off-Balance Sheet ArrangementsWe may enter into off-balance sheet arrangements and transactions that can give rise to materialoff-balance sheet obligations. As of December 31, 2018, our material off-balance sheet arrangementsand transactions include operating leases, supplemental bonds for plugging and abandonment andundrawn letters of credit. There are no other transactions, arrangements, or other relationships withunconsolidated entities or other persons that are reasonably likely to materially affect Kosmos liquidityor availability of or requirements for capital resources.Critical Accounting PoliciesThis discussion of financial condition and results of operations is based upon the informationreported in our consolidated financial statements, which have been prepared in accordance withgenerally accepted accounting principles in the United States. The preparation of our financialstatements requires us to make assumptions and estimates that affect the reported amounts of assets,liabilities, revenues and expenses, as well as the disclosure of contingent assets and liabilities as of thedate the financial statements are available to be issued. We base our assumptions and estimates onhistorical experience and other sources that we believe to be reasonable at the time. Actual results mayvary from our estimates. Our significant accounting policies are detailed in Item 8. FinancialStatements and Supplementary DataNote 2Accounting Policies. We have outlined below certainaccounting policies that are of particular importance to the presentation of our financial position andresults of operations and require the application of significant judgment or estimates by ourmanagement.96'