ACQUISITIONS AND DIVESTITURES - Assets and Liabilities of Branches Held for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of branches held-for-sale	$ 0	$ 46,554
Noninterest-bearing deposits	715,791	278,547
Interest-bearing deposits	1,266,598	986,495
Deposits of branches held-for-sale	$ 0	188,270
Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans		42,916
Premises and equipment, net		3,638
Assets of branches held-for-sale		46,554
Noninterest-bearing deposits		19,251
Interest-bearing deposits		169,019
Deposits of branches held-for-sale		$ 188,270

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Amount classified as assets attributable to disposal group held for sale or disposed of.

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Amount classified as accounts, notes and loans receivable attributable to disposal group held for sale or disposed of.

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Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of.

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Total amount of interest-bearing domestic deposit liabilities, which may include brokered, retail, demand, checking, notice of withdrawal, money market and other interest-bearing deposits.

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Amount of domestic noninterest-bearing deposits held by the entity, which may include demand deposits, checking, brokered and retail deposits.

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