Segment Information The Company has two reportable segments, real estate and debt and preferred equity investments. We evaluate real estate performance and allocate resources based on earnings contributions. The primary sources of revenue are generated from tenant rents and escalations and reimbursement revenue. Real estate property operating expenses consist primarily of security, maintenance, utility costs, insurance, real estate taxes and ground rent expense (at certain applicable properties). See Note 5, "Debt and Preferred Equity Investments," for additional details on our debt and preferred equity investments. Selected consolidated results of operations for the years ended December 31, 2018 , 2017 and 2016 and selected asset information as of December 31, 2018 and 2017 , regarding our operating segments are as follows (in thousands): Real Estate Segment Debt and Preferred Equity Segment Total Company Total revenues: Years ended: December 31, 2018 $ 625,695 $ 190,408 $ 816,103 December 31, 2017 773,561 193,977 967,538 December 31, 2016 761,314 214,102 975,416 Net Income: Years ended: December 31, 2018 $ 74,460 $ 125,024 $ 199,484 December 31, 2017 27,985 170,469 198,454 December 31, 2016 108,304 204,996 313,300 Total assets As of: December 31, 2018 $ 4,917,674 $ 2,091,623 $ 7,009,297 December 31, 2017 6,182,300 2,359,208 8,541,508 Interest costs for the debt and preferred equity segment include actual costs incurred for borrowings on the 2016 MRA and 2017 MRA. Interest is imputed on the investments that do not collateralize the 2016 MRA or 2017 MRA using our weighted average corporate borrowing cost. We also allocate loan loss reserves, net of recoveries, and transaction related costs to the debt and preferred equity segment. We do not allocate marketing, general and administrative expenses to the debt and preferred equity segment since the use of personnel and resources is dependent on transaction volume between the two segments and varies period over period. In addition, we base performance on the individual segments prior to allocating marketing, general and administrative expenses. There were no transactions between the above two segments.