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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Statement of Comprehensive Income [Abstract] |  |  |  |
Net income | $ 6,859 | $ 14,554 | $ 25,102 | $ 44,125
Other comprehensive income (loss), net of tax: |  |  |  |
Net change in unrealized gain (loss) on investment securities | (2,257) | 4,386 | 14,165 | 27,547
Defined benefit plans | 247 | 283 | 967 | 773
Total other comprehensive income (loss), net of tax | (2,010) | 4,669 | 15,132 | 28,320
Comprehensive income | $ 4,849 | $ 19,223 | $ 40,234 | $ 72,445

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