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Borrowings (Tables)
3 Months Ended
Mar. 31, 2021
Debt Disclosure [Abstract]  
Schedule of Borrowings
Borrowings consisted of the following (dollars in thousands):
 
     March 31,      December 31,  
     2021      2020      2020  
Securities sold under agreements with customers to repurchase
   $ 523,254      $ 410,146      $ 412,743  
Federal funds purchased
     25,350        1,725        17,350  
Advances from Federal Home Loan Bank of Dallas
     —          446,000        —    
    
 
 
    
 
 
    
 
 
 
Total
   $ 548,604      $ 857,871      $ 430,093