INCOME TAXES - Text Details Income Tax Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Expense Components [Line Items]
Statutory Federal income tax rate	21.00%	21.00%	21.00%
Increase (decrease) in deferred income taxes	$ 4,600
Increase to accumulated other comprehensive income	9,500
Deferred income tax expense/ (benefit)	10,441	$ (5,423)	$ (5,220)
Unrecognized tax benefits that would impact effective tax rate	900	$ 800	$ 800
Cumulative Effect, Period of Adoption, Adjustment
Income Tax Expense Components [Line Items]
Increase to shareholders' equity	$ 5,500