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Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Statement [Abstract] |  |  |  |
Loans, including fees |  | $ 1,482,567 | $ 1,600,462 | $ 1,817,285
Investment securities available for sale |  | 140,077 | 178,575 | 208,826
Loans held for sale |  | 23,809 | 15,078 | 3,254
Federal Reserve Bank balances |  | 3,777 | 2,839 | 10,384
Other earning assets |  | 3,113 | 7,541 | 10,889
Total interest income |  | 1,653,343 | 1,804,495 | 2,050,638
Interest expense: |  |  |  |
Deposits |  | 74,919 | 217,777 | 356,949
Federal funds purchased, securities sold under repurchase agreements, and other liabilities |  | 128 | 7,917 | 26,185
Long-term debt |  | 45,349 | 66,053 | 71,701
Total interest expense |  | 120,396 | 291,747 | 454,835
Net interest income |  | 1,532,947 | 1,512,748 | 1,595,803
Provision for (reversal of) credit losses | [1] | (106,251) | 355,022 | 87,720
Net interest income after provision for credit losses |  | 1,639,198 | 1,157,726 | 1,508,083
Non-interest revenue: |  |  |  |
Service charges on deposit accounts |  | 86,310 | 73,132 | 88,190
Fiduciary and asset management fees |  | 77,147 | 63,251 | 58,388
Card fees |  | 51,399 | 42,702 | 45,659
Brokerage revenue |  | 56,439 | 44,781 | 41,608
Mortgage banking income |  | 54,371 | 91,413 | 32,599
Capital markets income |  | 26,118 | 27,336 | 30,529
Income from bank-owned life insurance |  | 38,019 | 31,297 | 21,226
Investment securities gains (losses), net |  | (799) | 78,931 | (7,659)
Other non-interest revenue |  | 61,062 | 53,670 | 45,360
Total non-interest revenue |  | 450,066 | 506,513 | 355,900
Non-interest expense: |  |  |  |
Salaries and other personnel expense |  | 649,426 | 618,214 | 570,036
Net occupancy, equipment, and software expense |  | 169,222 | 169,658 | 161,906
Third-party processing and other services |  | 86,688 | 87,992 | 79,225
Professional fees |  | 32,785 | 56,899 | 35,300
FDIC insurance and other regulatory fees |  | 22,355 | 25,210 | 31,696
Goodwill impairment |  | 0 | 44,877 | 0
Restructuring charges |  | 7,223 | 26,991 | 1,230
Merger-related expense |  | 0 | 0 | 56,580
Other operating expense |  | 132,205 | 149,733 | 162,995
Non-interest expense |  | 1,099,904 | 1,179,574 | 1,098,968
Income before income taxes |  | 989,360 | 484,665 | 765,015
Income tax expense |  | 228,893 | 110,970 | 201,235
Net income |  | 760,467 | 373,695 | 563,780
Less: Preferred stock dividends |  | 33,163 | 33,163 | 22,881
Net income available to common shareholders |  | $ 727,304 | $ 340,532 | $ 540,899
Net income per common share, basic (in dollars per share) |  | $ 4.95 | $ 2.31 | $ 3.50
Net income per common share, diluted (in dollars per share) |  | $ 4.90 | $ 2.30 | $ 3.47
Weighted average common shares outstanding, basic (in shares) |  | 147,041 | 147,415 | 154,331
Weighted average common shares outstanding, diluted (in shares) |  | 148,495 | 148,210 | 156,058
[1] | Beginning January 1, 2020, provision calculation is based on current expected credit loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.

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