XML 104 R90.htm IDEA: XBRL DOCUMENT v3.20.4
RETIREMENT PLANS (Narrative) (Details)
 12 Months Ended
Dec. 31, 2020
USD ($)
person
Dec. 31, 2019
USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Percentage of participants average monthly pay used to calculate benefit accruals 0.75%  
Maximum years of benefit used to calculate benefit accruals 25 years  
Number of active, vested terminated, and retired persons in the Plan | person 347  
Actuarial gain (loss), mortality assumptions $ (3,699,000)  
Corporation common stock included in equity securities, percentage of total plan assets 4.00% 6.00%
Employee contribution percentage, maximum 100.00%  
Additional compensation contributed to plan 50.00%  
Percentage over employees' gross pay 2.00%  
Balance accrued included in other liabilities $ 3,491,000 $ 3,196,000
Annual expense included in salaries and benefits expense $ 524,000 493,000
Banking Subsidiary    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Employer Match Percentage of Income 3.00%  
Employer Contributions to and Expenses for the Plan $ 887,000 709,000
Insurance Subsidiary    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Employer Contributions to and Expenses for the Plan $ 126,000 123,000
Non-highly compensated employees | Insurance Subsidiary    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Employer Match Percentage of Income 6.00%  
Highly compensated employees | Insurance Subsidiary    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Employer Match Percentage of Income 3.00%  
Corporation common stock    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair value of plan assets $ 1,963,000 $ 2,854,000