Revenue Recognition - Base rentals are recognized on a straight-line basis over the term of the lease. Straight-line rent adjustments recorded as a receivable in other assets on the consolidated balance sheets were approximately $57.5 million and $51.9 million as of December 31, 2018 and 2017 , respectively. As a provision of a tenant lease, if we make a cash payment to the tenant for purposes other than funding the construction of landlord assets, we defer the amount of such payments as a lease incentive. We amortize lease incentives as a reduction of base rental revenue over the term of the lease. The majority of our leases contain provisions which provide additional rents based on tenants' sales volume (percentage rentals) and reimbursement of the tenants' share of advertising and promotion, common area maintenance, insurance and real estate tax expenses. Percentage rentals are recognized when specified targets that trigger the contingent rent are met. Expense reimbursements are recognized in the period the applicable expenses are incurred. For certain tenants, we receive a fixed payment for common area maintenance ("CAM") which is recognized as revenue when earned. When not reimbursed by the fixed-CAM component, CAM expense reimbursements are based on the tenant's proportionate share of the allocable operating expenses for the property. Payments received from the early termination of leases are recognized as revenue from the time the payment is receivable until the tenant vacates the space. The values of the above and below market leases are amortized and recorded as either an increase (in the case of below market leases) or a decrease (in the case of above market leases) to rental income over the remaining term of the associated lease. If a tenant terminates its lease prior to the original contractual termination of the lease and no rental payments are being made on the lease, any unamortized balance of the related above or below market lease value will be written off. We receive development, leasing, loan guarantee, management and marketing fees from third parties and unconsolidated affiliates for services provided to properties held in joint ventures. Development and leasing fees received from unconsolidated affiliates are recognized as revenue when earned to the extent of the third party partners' ownership interest. Development and leasing fees earned to the extent of our ownership interest are recorded as a reduction to our investment in the unconsolidated affiliate. Loan guarantee fees are recognized over the term of the guarantee. Management fees and marketing fees are recognized as revenue when earned. Fees recognized from these activities are shown as management, leasing and other services in our consolidated statements of operations. Fees received from consolidated joint ventures are eliminated in consolidation.