Operating lease income  Operating lease income includes rent earned from operating leases of land and buildings owned by the Company to its tenants. Operating lease income is recognized on the straight-line method of accounting, generally from the later of the date the lessee takes possession of the space and it is ready for its intended use or the date of acquisition of the asset subject to existing leases. Accordingly, increases in contractual lease payments are recognized evenly over the term of the lease. The periodic difference between operating lease income recognized under this method and contractual lease payment terms is recorded as deferred operating lease income receivable and is included in Deferred operating lease income receivable, net on the Company's consolidated balance sheets. The Company is also entitled to percentage rent, representing a portion of the Company's lessee's gross revenues from the properties, pursuant to some of its leases and records percentage rent as operating lease income when earned. During the years ended December 31, 2019 and 2018 , the Company recorded $4.3 million and $3.6 million , respectively, of percentage rent from operating leases. Operating lease income also includes the amortization of finite lived intangible assets and liabilities, which are amortized over the period during which the assets or liabilities are expected to contribute directly or indirectly to the future cash flows of the business acquired. The Company estimates losses within operating lease income receivable and deferred operating lease income receivable balances as of the balance sheet date and incorporates a reserve based on management's evaluation of the credit risks associated with these receivables. As of December 31, 2019 and 2018 , we did not have an allowance for doubtful accounts related to real estate tenant receivables or deferred operating lease income.