NONINTEREST INCOME - Other income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Managed service fees
Revenue from External Customer [Line Items]
Noninterest fee income	$ 3,794	$ 3,628	$ 11,549	$ 10,195
Currency preparation
Revenue from External Customer [Line Items]
Noninterest fee income	1,083	823	2,842	2,413
ATM loss protection
Revenue from External Customer [Line Items]
Noninterest fee income	597	644	1,815	1,923
Miscellaneous products and services
Revenue from External Customer [Line Items]
Noninterest fee income	1,719	1,942	3,920	7,947
Other income
Revenue from External Customer [Line Items]
Noninterest fee income	$ 7,193	$ 7,037	$ 20,126	$ 22,478