|**Income Tax**                                             | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|---------------------------------------------------------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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|**Income Tax Disclosure [Abstract]**                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|Income Tax                                                 | INCOME TAXThe following table summarizes the major components creating differences between income taxes at the federal statutory and the effective tax rate recorded in the consolidated statements of income for thethree months ended March 31, 2020and2019:Three Months EndedMarch 31,20202019Reconciliation of Federal Statutory to Actual Tax Expense:Federal statutory income tax at 21%$7,928$9,609Tax-exempt interest income(3,022)(2,267)Share-based compensation—(350)Tax-exempt earnings and gains on life insurance(286)(207)Tax credits(61)(78)CARES Act - NOL carryback rate differential(1,178)—Other109234Actual Tax Expense$3,490$6,941Effective Tax Rate9.2%15.2%
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|                                                           | Three Months EndedMarch 31,                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                                           | 2020                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Reconciliation of Federal Statutory to Actual Tax Expense: |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|Federal statutory income tax at 21%                        | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Tax-exempt interest income                                 | (3,022                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Share-based compensation                                   | —                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Tax-exempt earnings and gains on life insurance            | (286                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Tax credits                                                | (61                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|CARES Act - NOL carryback rate differential                | (1,178                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Other                                                      | 109                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Actual Tax Expense                                         | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|Effective Tax Rate                                         | 9.2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

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