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CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Interest Income |  |  |  |
Residential loans | $ 55,514 | $ 36,635 | $ 105,745 | $ 70,997
Real estate securities | 26,296 | 21,826 | 51,991 | 41,643
Other interest income | 1,166 | 763 | 1,859 | 1,212
Total interest income | 82,976 | 59,224 | 159,595 | 113,852
Interest Expense |  |  |  |
Short-term debt | (13,175) | (9,350) | (26,610) | (13,803)
Asset-backed securities issued | (16,349) | (3,705) | (27,750) | (7,235)
Long-term debt | (18,689) | (11,179) | (35,367) | (24,227)
Total Interest Expense | (48,213) | (24,234) | (89,727) | (45,265)
Net Interest Income | 34,763 | 34,990 | 69,868 | 68,587
Non-interest Income |  |  |  |
Mortgage banking activities, net | 10,596 | 12,046 | 37,172 | 29,650
Investment fair value changes, net | 889 | 8,115 | 2,498 | 9,666
Other income, net | 3,322 | 3,764 | 5,440 | 6,661
Realized gains, net | 4,714 | 1,372 | 14,077 | 7,075
Total non-interest income, net | 19,521 | 25,297 | 59,187 | 53,052
Operating expenses | (19,009) | (18,641) | (42,039) | (36,867)
Net Income before Provision for Income Taxes | 35,275 | 41,646 | 87,016 | 84,772
Provision for income taxes | (2,528) | (5,322) | (7,424) | (11,479)
Net Income | $ 32,747 | $ 36,324 | $ 79,592 | $ 73,293
Basic earnings per common share (in dollars per share) | $ 0.42 | $ 0.46 | $ 1.02 | $ 0.93
Diluted earnings per common share (in dollars per share) | 0.38 | 0.43 | 0.88 | 0.85
Regular dividends declared per common share (in dollars per share) | $ 0.30 | $ 0.28 | $ 0.58 | $ 0.56
Basic weighted average shares outstanding (in shares) | 75,380,715 | 76,819,703 | 75,388,638 | 76,779,178
Diluted weighted average shares outstanding (in shares) | 100,431,993 | 97,494,144 | 104,291,180 | 97,718,550

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- Definition The net income attributable to mortgage banking activities. This includes market valuations related to residential and commercial loans, Sequoia IOs, and mortgage banking derivatives, as well as realized gains or losses associated with mortgage loan sales. + References No definition available. + Details
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