OTHER BENEFIT PLANS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of Other Benefit Plan [Line Items]
Potential Cash Payments Under Employment Agreements	$ 5,300,000
Directors' Deferred Compensation and Cash Plans
Summary of Other Benefit Plan [Line Items]
Deferred Compensation Liability	4,400,000	$ 4,000,000.0
Deferred Compensation Arrangement with Individual, Compensation Expense	515,000	486,000	$ 491,000
Other Employee Benefit Plans
Summary of Other Benefit Plan [Line Items]
Deferred Compensation Expense	461,000	(31,000)	456,000
Deferred Compensation Liability	4,200,000	3,300,000
Retirement Benefits Plan 401k
Summary of Other Benefit Plan [Line Items]
Deferred Compensation Expense	$ 1,800,000	$ 1,800,000	$ 1,700,000
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	6.00%