NONINTEREST INCOME - Other income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Managed service fees
Revenue from External Customer [Line Items]
Noninterest fee income	$ 3,724	$ 3,624	$ 7,755	$ 6,566
Currency preparation
Revenue from External Customer [Line Items]
Noninterest fee income	919	851	1,759	1,590
ATM loss protection
Revenue from External Customer [Line Items]
Noninterest fee income	571	652	1,218	1,280
Miscellaneous products and services
Revenue from External Customer [Line Items]
Noninterest fee income	766	2,607	2,201	6,005
Other income
Revenue from External Customer [Line Items]
Noninterest fee income	$ 5,980	$ 7,734	$ 12,933	$ 15,441