Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

LOAN SERVICING RIGHTS - Schedule of Carrying Value of Loan Servicing Rights Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Servicing Assets at Fair Value [Line Items]
Loan servicing rights	$ 161,220	$ 136,542
Residential mortgage
Servicing Assets at Fair Value [Line Items]
Loan servicing rights	154,746	130,630	$ 85,922	$ 94,902
SBA
Servicing Assets at Fair Value [Line Items]
Loan servicing rights	6,445	5,839	5,394	7,886
Indirect automobile
Servicing Assets at Fair Value [Line Items]
Loan servicing rights	$ 29	$ 73	$ 204	$ 247