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BASIS OF PRESENTATION (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
BASIS OF PRESENTATION
Allowance for credit losses		$ 39,215	$ 32,786	$ 31,784	$ 31,418
Adjustment to retained earnings		153,766	$ 150,703
ASU 2016-13 \| Impact of adoption
BASIS OF PRESENTATION
Allowance for credit losses	$ 1,600	$ 1,625
Reserve for unfunded commitments	500
Cumulative effect on retained earnings	1,500
Adjustment to retained earnings	$ 0