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Operations and Summary of Significant Accounting Policies - Revision of Prior Period Financial Statements, Income Statement (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]    
Salaries and employee benefits $ 87,522 $ 77,193
Other non-interest expense 8,975 10,260
Non-interest expense 150,316 165,417
Income before income taxes 94,849 (21,318)
Net income 71,938 (16,687)
Net income available to common stockholders 68,159 (19,125)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent $ (273) $ (20,868)