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CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Interest income: |  |  |  |
Loans | $ 442,576 | $ 477,833 | $ 1,304,479 | $ 1,513,279
Investments | 3,366 | 3,327 | 9,262 | 9,086
Cash and cash equivalents | 1,613 | 1,218 | 4,662 | 19,740
Total interest income | 447,555 | 482,378 | 1,318,403 | 1,542,105
Interest expense: |  |  |  |
Deposits | 51,629 | 83,500 | 175,483 | 318,858
Interest expense on short-term borrowings | 5,458 | 3,424 | 14,360 | 11,041
Interest expense on long-term borrowings | 32,950 | 30,887 | 101,144 | 98,750
Total interest expense | 90,037 | 117,811 | 290,987 | 428,649
Net interest income | 357,518 | 364,567 | 1,027,416 | 1,113,456
Less: provisions for credit losses | 138,442 | (3,640) | (17,648) | 409,505
Net interest income after provisions for credit losses | 219,076 | 368,207 | 1,045,064 | 703,951
Non-interest income: |  |  |  |
Gains (losses) on sales of loans, net | (10) | (4) | 402,780 | 238,562
Gains (losses) on derivatives and hedging activities, net | 44 | (15) | 161 | 49,408
Other income | 13,879 | 9,646 | 76,747 | 42,547
Total non-interest income | 13,913 | 9,627 | 479,688 | 330,517
Operating expenses |  |  |  |
Compensation and benefits | 66,229 | 62,743 | 200,426 | 219,413
FDIC assessment fees | 6,521 | 1,455 | 17,634 | 17,508
Other operating expenses | 67,899 | 63,292 | 175,098 | 179,424
Total operating expenses | 140,649 | 127,490 | 393,158 | 416,345
Restructuring expenses | 108 | 24,127 | 1,255 | 24,127
Total non-interest expenses | 140,757 | 151,617 | 394,413 | 440,472
Income before income tax expense | 92,232 | 226,217 | 1,130,339 | 593,996
Income tax expense | 19,392 | 55,189 | 276,091 | 146,006
Net income | 72,840 | 171,028 | 854,248 | 447,990
Preferred stock dividends | 1,166 | 2,058 | 3,559 | 8,000
Net income attributable to SLM Corporation common stock | 71,674 | 168,970 | 850,689 | 439,990
Net income attributable to SLM Corporation common stock | $ 71,674 | $ 168,970 | $ 850,689 | $ 439,990
Basic earnings per common share attributable to SLM Corporation (in dollars per share) | $ 0.24 | $ 0.45 | $ 2.62 | $ 1.14
Average common shares outstanding (in shares) | 299,890,000 | 375,094,000 | 324,148,000 | 386,587,000
Diluted earnings per common share attributable to SLM Corporation (in dollars per share) | $ 0.24 | $ 0.45 | $ 2.59 | $ 1.13
Average common and common equivalent shares outstanding (in shares) | 304,511,000 | 377,918,000 | 329,064,000 | 389,391,000
Declared dividends per common share attributable to SLM Corporation (in dollars per share) | $ 0.03 | $ 0 | $ 0.09 | $ 0.09

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