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Quarterly Financial Results (unaudited)
 12 Months Ended
Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Results (unaudited)
Note 22.  Quarterly Financial Results (unaudited)

A summary of selected consolidated quarterly financial data for each of the years in the three-year period ended December 31, 2021 follows:
(in thousands, except per share data)First
Quarter		Second
Quarter		Third
Quarter		Fourth
Quarter
2021    
Interest income$251,917 $259,236 $260,868 $259,193 
Net interest income222,870 233,225 237,543 238,763 
Provision for credit losses7,235 2,834 3,382 2,675 
Net income before taxes153,648 162,458 169,405 166,394 
Net income125,428 131,790 136,577 133,528 
Net income available to common shareholders121,630 127,992 132,779 129,730 
Basic net income per common share$1.61 $1.70 $1.76 $1.72 
Diluted net income per common share$1.61 $1.69 $1.75 $1.71 
2020    
Interest income$263,069 $251,738 $249,188 $257,047 
Net interest income193,552 200,657 206,594 220,985 
Provision for credit losses105,045 72,832 16,758 9,180 
Net income before taxes26,691 73,674 137,049 133,944 
Net income 28,356 62,444 110,645 110,876 
Net income available to common shareholders28,356 62,444 106,847 107,078 
Basic net income per common share$0.37 $0.83 $1.42 $1.42 
Diluted net income per common share$0.37 $0.83 $1.42 $1.42 
2019    
Interest income$257,883 $265,851 $275,749 $268,453 
Net interest income187,246 188,918 195,806 194,172 
Provision for credit losses7,184 7,195 8,260 4,644 
Net income before taxes117,074 124,719 137,224 118,520 
Net income available to common shareholders93,960 100,321 110,521 96,079 
Basic net income per common share$1.22 $1.31 $1.45 $1.26 
Diluted net income per common share$1.22 $1.31 $1.44 $1.26