NONINTEREST INCOME - Credit/debit card and ATM Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Credit/debit card and ATM income
Revenue from External Customer [Line Items]
Noninterest fee income	$ 6,805	$ 11,359
Bailment fees
Revenue from External Customer [Line Items]
Noninterest fee income	3,059	5,081
Interchange fees
Revenue from External Customer [Line Items]
Noninterest fee income	3,055	5,616
Other card and ATM fees
Revenue from External Customer [Line Items]
Noninterest fee income	$ 691	$ 662