as of december a031 , 2017 , system energy , in connection with the grand gulf sale and leaseback transactions , had future minimum lease payments ( reflecting an implicit rate of 5.13% ( 5.13 % ) ) that are recorded as long-term debt , as follows : amount ( in thousands ) .
what portion of the future minimum lease payments is due within the next 12 months?
entergy corporation and subsidiaries notes to financial statements note 11 . a0 retirement , other postretirement benefits , and defined contribution plans a0 a0 ( entergy corporation , entergy arkansas , entergy louisiana , entergy mississippi , entergy new orleans , entergy texas , and system energy ) qualified pension plans entergy has eight qualified pension plans covering substantially all employees . the entergy corporation retirement plan for non-bargaining employees ( non-bargaining plan i ) , the entergy corporation retirement plan for bargaining employees ( bargaining plan i ) , the entergy corporation retirement plan ii for non-bargaining employees ( non-bargaining plan ii ) , the entergy corporation retirement plan ii for bargaining employees , the entergy corporation retirement plan iii , and the entergy corporation retirement plan iv for bargaining employees a0are non-contributory final average pay plans and provide pension benefits that are based on employees 2019 credited service and compensation during employment . effective as of the close of business on december 31 , 2016 , the entergy corporation retirement plan iv for non-bargaining employees ( non-bargaining plan iv ) was merged with and into non-bargaining plan ii . at the close of business on december 31 , 2016 , the liabilities for the accrued benefits and the assets attributable to such liabilities of all participants in non-bargaining plan iv were assumed by and transferred to non-bargaining plan ii . there was no loss of vesting or benefit options or reduction of accrued benefits to affected participants as a result of this plan merger . non-bargaining employees whose most recent date of hire is after june 30 , 2014 participate in the entergy corporation cash balance plan for non-bargaining employees ( non-bargaining cash balance plan ) . certain bargaining employees hired or rehired after june 30 , 2014 , or such later date provided for in their applicable collective bargaining agreements , participate in the entergy corporation cash balance plan for bargaining employees ( bargaining cash balance plan ) . the registrant subsidiaries participate in these four plans : non-bargaining plan i , bargaining plan i , non-bargaining cash balance plan , and bargaining cash balance plan . the assets of the six final average pay qualified pension plans are held in a master trust established by entergy , and the assets of the two cash balance pension plans are held in a second master trust established by entergy . a0 a0each pension plan has an undivided beneficial interest in each of the investment accounts in its respective master trust that is maintained by a trustee . a0 a0use of the master trusts permits the commingling of the trust assets of the pension plans of entergy corporation and its registrant subsidiaries for investment and administrative purposes . a0 a0although assets in the master trusts are commingled , the trustee maintains supporting records for the purpose of allocating the trust level equity in net earnings ( loss ) and the administrative expenses of the investment accounts in each trust to the various participating pension plans in that particular trust . a0 a0the fair value of the trusts 2019 assets is determined by the trustee and certain investment managers . a0 a0for each trust , the trustee calculates a daily earnings factor , including realized and .