NONINTEREST INCOME - Credit/debit card and ATM Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Credit/debit card and ATM income
Revenue from External Customer [Line Items]
Noninterest fee income	$ 7,251	$ 13,115	$ 27,916	$ 38,307
Bailment fees
Revenue from External Customer [Line Items]
Noninterest fee income	3,311	6,580	11,472	20,387
Interchange fees
Revenue from External Customer [Line Items]
Noninterest fee income	3,267	6,234	14,514	17,073
Other card and ATM fees
Revenue from External Customer [Line Items]
Noninterest fee income	$ 673	$ 301	$ 1,930	$ 847