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COMMITMENTS AND CONTINGENCIES (Commitments Without Recorded Liability) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Reserve for Unfunded Loan Commitments | $ 10,100,000 |  | $ 10,100,000 |  | $ 13,300,000
Mortgage loan applications, day interest rate is locked |  |  | 45 days |  |
Minimum [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Mortgage loan applications, day interest rate is locked |  |  | 30 days |  |
Maximum [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Mortgage loan applications, day interest rate is locked |  |  | 60 days |  |
Commitments to Extend Credit [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Contract or Notional Amount | 3,443,004,000 |  | $ 3,443,004,000 |  | 3,207,072,000
Financial Standby Letter of Credit [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Contract or Notional Amount | 20,987,000 |  | 20,987,000 |  | 18,415,000
Loan Origination Commitments [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Contract or Notional Amount | 106,989,000 |  | 106,989,000 |  | 101,426,000
Risk Participation Agreement [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Contract or Notional Amount | 40,325,000 |  | 40,325,000 |  | 40,949,000
Loans Held for Sale Origination Commitments [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Contract or Notional Amount | 139,578,000 |  | 139,578,000 |  | 169,653,000
Commitments to Sell Loans Secured by one to four Residential Properties [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Contract or Notional Amount | 55,641,000 |  | 55,641,000 |  | 79,414,000
Counterparty default losses on forward contracts | 0 | $ 0 | 0 | $ 0 |
Commitments to Sell Mortgage Backed Securities [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Contract or Notional Amount | 142,500,000 |  | 142,500,000 |  | 204,000,000
Amount funded out of a total commitment to invest [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Other Commitment | 5,500,000 |  | 5,500,000 |  | 2,800,000
Other Commitments [Line Items] |  |  |  |  |
Other Commitment | 5,500,000 |  | 5,500,000 |  | 2,800,000
Other Commitment, 2021 Agreement | 555,000 |  | 555,000 |  |
Other Commitment, 2021 Agreement | 555,000 |  | 555,000 |  |
Amount unfunded out of a total commitment to invest [Member] |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Other Commitment | 4,500,000 |  | 4,500,000 |  | 7,200,000
Other Commitments [Line Items] |  |  |  |  |
Other Commitment | 4,500,000 |  | 4,500,000 |  | $ 7,200,000
Other Commitment, 2021 Agreement | 3,900,000 |  | 3,900,000 |  |
Other Commitment, 2021 Agreement | 3,900,000 |  | 3,900,000 |  |
Commitments |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Other Commitment | 4,500,000 |  | 4,500,000 |  |
Other Commitments [Line Items] |  |  |  |  |
Other Commitment | $ 4,500,000 |  | $ 4,500,000 |  |

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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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