Segment Information Net Operating Income (NOI) represents total revenues less operating expenses. We consider NOI to be the primary non-GAAP financial measure for making decisions and assessing the unlevered performance of our segments as it relates to the total return on assets as opposed to the levered return on equity. As properties are bought and sold based on NOI, we utilize this measure to make investment decisions as well as to compare the performance of our assets to that of our peers. NOI should not be considered a substitute for net income. NOI may not be comparable to similarly titled measures employed by other companies. Below is a reconciliation of net income, the most directly comparable GAAP financial measure, to NOI at share and NOI at share - cash basis for the three months ended March 31, 2019 and 2018 . (Amounts in thousands) For the Three Months Ended March 31, 2019 2018 Net income $ 213,044 $ 282 Deduct: (Income) loss from partially owned entities (7,320 ) 9,904 Interest and other investment (income) loss, net (5,045 ) 24,384 Net gains on disposition of wholly owned and partially owned assets (220,294 )  NOI attributable to noncontrolling interests in consolidated subsidiaries (17,403 ) (17,312 ) Add: Loss from real estate fund investments 167 8,807 Depreciation and amortization expense 116,709 108,686 General and administrative expense 58,020 42,533 Transaction related costs and other 149 13,156 NOI from partially owned entities 67,402 67,513 Interest and debt expense 102,463 88,166 Loss from discontinued operations 137 363 Income tax expense 29,743 2,554 NOI at share 337,772 349,036 Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net, and other (5,181 ) (17,948 ) NOI at share - cash basis $ 332,591 $ 331,088 22 . Segment Information - continued Below is a summary of NOI at share and NOI at share - cash basis by segment for the three months ended March 31, 2019 and 2018 . (Amounts in thousands) For the Three Months Ended March 31, 2019 Total New York Other Total revenues $ 534,668 $ 443,285 $ 91,383 Operating expenses 246,895 198,095 48,800 NOI - consolidated 287,773 245,190 42,583 Deduct: NOI attributable to noncontrolling interests in consolidated subsidiaries (17,403 ) (11,407 ) (5,996 ) Add: NOI from partially owned entities 67,402 49,575 17,827 NOI at share 337,772 283,358 54,414 Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net, and other (5,181 ) (6,618 ) 1,437 NOI at share - cash basis $ 332,591 $ 276,740 $ 55,851 (Amounts in thousands) For the Three Months Ended March 31, 2018 Total New York Other Total revenues $ 536,437 $ 448,484 $ 87,953 Operating expenses 237,602 197,916 39,686 NOI - consolidated 298,835 250,568 48,267 Deduct: NOI attributable to noncontrolling interests in consolidated subsidiaries (17,312 ) (11,745 ) (5,567 ) Add: NOI from partially owned entities 67,513 49,773 17,740 NOI at share 349,036 288,596 60,440 Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net, and other (17,948 ) (17,323 ) (625 ) NOI at share - cash basis $ 331,088 $ 271,273 $ 59,815