b'KOSMOS ENERGY LTD.Notes to Consolidated Financial Statements (Continued)8. Debt (Continued)each case held by us in relation to our wholly-owned subsidiary, Kosmos Energy Holdings, pursuant tothe terms of the Charge over Shares of Kosmos Energy Delaware Holdings, LLC dated as ofDecember 20, 2018, among Kosmos Energy Delaware Holdings, LLC, Credit Agricole Corporate andInvestment Bank, as Security and Intercreditor Agent, and Wilmington Trust, National Association, asTrustee to the Senior Notes. The Senior Notes share pari passu in the benefit of such equitable chargebased on the respective amounts of the obligations under the Indenture and the amount of obligationsunder the Corporate Revolver. The Guarantees are not secured.At December 31, 2018, the estimated repayments of debt during the five years and thereafter areas follows:Payments Due by YearTotal 2019 2020 2021 2022 2023 Thereafter(In thousands)Principal debt repayments(1) . . . . . . . . . . $2,175,000 $ $ $685,600 $614,100 $305,100 $570,200(1) Includes the scheduled principal maturities for the $525.0 million aggregate principal amount ofSenior Notes issued in August 2014 and April 2015, borrowings under the Facility and theCorporate Revolver. The scheduled maturities of debt related to the Facility are based on, as ofDecember 31, 2018, our level of borrowings and our estimated future available borrowing basecommitment levels in future periods. Any increases or decreases in the level of borrowings orincreases or decreases in the available borrowing base would impact the scheduled maturities ofdebt during the next five years and thereafter.Interest and other financing costs, netInterest and other financing costs, net incurred during the period comprised of the following:Years Ended December 31,2018 2017 2016(In thousands)Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . $114,134 $ 92,687 $ 89,029Amortizationdeferred financing costs . . . . . . . . . . 9,379 10,204 10,204Loss on extinguishment of debt . . . . . . . . . . . . . . . 4,324Capitalized interest . . . . . . . . . . . . . . . . . . . . . . . . (28,331) (30,282) (59,803)Deferred interest . . . . . . . . . . . . . . . . . . . . . . . . . . (1,138) 2,577 (581)Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . (3,455) (3,422) (1,954)Other, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,263 5,831 7,252Interest and other financing costs, net . . . . . . . . . $101,176 $ 77,595 $ 44,1479. Derivative Financial InstrumentsWe use financial derivative contracts to manage exposures to commodity price and interest ratefluctuations. We do not hold or issue derivative financial instruments for trading purposes.We manage market and counterparty credit risk in accordance with our policies and guidelines. Inaccordance with these policies and guidelines, our management determines the appropriate timing and132'