REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	$ 20,301	$ 17,776
Loan servicing income	838	963
Securities gains (losses), net	(30)	1,658
Unrealized loss on equity securities, net	(110)	(231)
Net gains on sale of loans held for sale	6,420	4,660
Valuation adjustment on servicing rights	917	(1,565)
Income on bank owned life insurance	829	498
Other noninterest income	1,152	2,058
Total noninterest income out-of-scope of Topic 606	10,016	8,041
TOTAL NONINTEREST INCOME	30,317	25,817
Service charges and fees on deposit accounts
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	3,936	3,438
Overdraft fees
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	2,592	2,809
Customer service and other service fees
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	46	59
Credit card fee income
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	4,308	3,900
Debit card income
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	2,789	1,815
Total service charges and fees
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	13,671	12,021
Trust fees
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	5,777	5,022
Brokerage and insurance commissions
Disaggregation of Revenue [Line Items]
Service charges and fees on deposit accounts	$ 853	$ 733