CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Reclassification out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-interest income	$ 7,643	$ 7,126			$ 21,263	$ 20,485
Tax expense	780	2,076			3,847	6,136
Net of tax	5,015	8,970	$ 13,398	$ 16,347	18,413	25,317
Reclassification out of AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-interest income	157	0			157	0
Tax expense	(37)	0			(37)	0
Net of tax	$ 120	$ 0			$ 120	$ 0

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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