EMPLOYEE BENEFIT PLANS Deferred Compensation Plans (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Management and Directors Deferred Compensation Plan [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Assets of the deferred compensation plan	$ 0.5	$ 0.5
Acquired Individual Deferred Compensation Arrangement [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Assets of the deferred compensation plan	1.3	1.5
Liabilities of deferred compensation plan	$ 5.5	$ 5.4