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Unaudited Interim Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Unaudited Interim Financial Data |  |  |
Total interest income | $ 326,598 | $ 356,234 | $ 286,033
Total interest expense | 43,663 | 69,011 | 44,627
Net interest income | 282,935 | 287,223 | 241,406
Provision for credit losses | 38,797 | 10,406 | 4,429
Total non-interest income | 118,265 | 116,415 | 89,993
Total non-interest expense | 234,197 | 258,794 | 193,043
Income before income taxes | 128,206 | 134,438 | 133,927
Income taxes | 27,862 | 31,485 | 34,999
Net income | $ 100,344 | $ 102,953 | $ 98,928
Basic earnings per share (in dollars per share) | $ 1.84 | $ 1.88 | $ 2.02
Diluted earnings per share (in dollars per share) | $ 1.83 | $ 1.87 | $ 2.01

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