The Companys revenues, which primarily consist of rental income, include rents that each tenant pays in accordance with the terms of each lease reported on a straight-line basis over the initial non-cancelable term of the lease. When the Company acquires a property, the term of each existing lease is considered to commence as of the acquisition date for the purposes of this calculation. Since many of the leases provide for rental increases at specified intervals, straight-line basis accounting requires the Company to record a receivable, and include in revenues, unbilled rent receivables that the Company will only receive if the tenant makes all rent payments required through the expiration of the initial term of the lease. Straight-line rent receivables are included in rent and tenant receivables and other assets, net, in the consolidated balance sheets. See Note 8  Rent and Tenant Receivables and Other Assets, Net . Cost recoveries from tenants are included in operating expense reimbursements in the consolidated statements of operations in the period the related costs are incurred. The Company defers the revenue related to lease payments received from tenants in advance of their due dates. As of March 31, 2016 and December 31, 2015 , the Company had $67.3 million and $67.2 million , respectively, of deferred rental income, which is included in deferred rent, derivative and other liabilities in the consolidated balance sheets. The Company continually reviews receivables related to rent and unbilled rent receivables and determines collectability by taking into consideration the tenants payment history, the financial condition of the tenant, business conditions in the industry in which the tenant operates and economic conditions in the area in which the property is located. In the event that the collectability of a receivable is uncertain, the Company will record an increase in the allowance for uncollectible accounts in the consolidated balance sheets or record a direct write-off of the receivable in the conso