NONINTEREST INCOME - Credit/debit card and ATM Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Credit/debit card and ATM income
Revenue from External Customer [Line Items]
Noninterest fee income	$ 9,306	$ 13,677	$ 20,665	$ 25,192
Bailment fees
Revenue from External Customer [Line Items]
Noninterest fee income	3,080	6,908	8,161	13,807
Interchange fees
Revenue from External Customer [Line Items]
Noninterest fee income	5,631	6,452	11,247	10,839
Other card and ATM fees
Revenue from External Customer [Line Items]
Noninterest fee income	$ 595	$ 317	$ 1,257	$ 546