LOANS AND LEASES - Commercial Real Estate Loans (Details) - Loan Portfolio Diversification Risk - Commercial real estate	3 Months Ended	12 Months Ended
Mar. 31, 2022	Dec. 31, 2021
Percent owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Percent of total loans and leases	29.30%	28.80%
Percent non-owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Percent of total loans and leases	70.70%	71.20%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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