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Condensed Financial Information (Parent Company Only) - Condensed Statements of Income (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Financial Statements, Captions |  |  |
Salaries and benefits | $ 164.9 | $ 173.7 | $ 155.3
Interest expense | 17.3 | 26.6 | 59.0
Acquisition related expenses | 11.6 | 0.0 | 20.3
Earnings before income tax benefit |  | 209.3 | 235.1
Income tax benefit | 55.7 | 48.1 | 54.1
Net income | 192.1 | 161.2 | 181.0
Parent Company |  |  |
Condensed Financial Statements, Captions |  |  |
Dividends from subsidiaries | 160.0 | 130.0 | 178.0
Other interest income | 0.0 | 0.1 | 0.3
Other income, primarily management fees from subsidiaries | 41.3 | 28.7 | 25.9
Total income | 201.3 | 158.8 | 204.2
Salaries and benefits | 36.4 | 31.5 | 34.2
Interest expense | 8.2 | 6.6 | 4.7
Acquisition related expenses | 11.6 | 0.0 | 17.0
Other operating expenses, net | 17.6 | 15.6 | 14.8
Total expenses | 73.8 | 53.7 | 70.7
Earnings before income tax benefit | 127.5 | 105.1 | 133.5
Income tax benefit | (7.6) | (6.1) | (11.9)
Income before undistributed earnings of subsidiaries | 135.1 | 111.2 | 145.4
Undistributed earnings of subsidiaries | 57.0 | 50.0 | 35.6
Net income | $ 192.1 | $ 161.2 | $ 181.0

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