The following is a schedule of future minimum lease payments to be received on noncancellable operating leases at  December 31, 2013 (dollars in thousands): Since lease renewal periods are exercisable at the option of the tenant, the above table only presents future minimum lease  payments due during the current lease terms. In addition, this table does not include amounts for potential variable rent  increases that are based on the CPI or future contingent rents which may be received on the leases based on a percentage of the  tenant’s gross sales. Real Estate Portfolio – Accounted for Using the Direct Financing Method – The following lists the components of net  investment in direct financing leases at December 31 (dollars in thousands): The following is a schedule of future minimum lease payments to be received on direct financing leases held for investment at  December 31, 2013 (dollars in thousands): The above table does not include future minimum lease payments for renewal periods, potential variable CPI rent increases or  contingent rental payments that may become due in future periods (see Real Estate Portfolio – Accounted for Using the  Operating Method).  57 2014 $ 3,094 2015 2,956 2016 2,873 2017 2,035 2018 2,007 Thereafter 7,504 $ 20,469 2013 2012 Minimum lease payments to be received $ 20,469 $ 27,963 Estimated unguaranteed residual values 8,274 10,142 Less unearned income (10,401) (14,888) Net investment in direct financing leases $ 18,342 $ 23,217 2014 $ 384,218 2015 379,726 2016 374,064 2017 365,149 2018 338,197 Thereafter 2,782,929 $ 4,624,283