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v3.22.1

BORROWINGS (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Feb. 01, 2019
Subordinated Borrowing [Line Items] |  |  |  |  |
Remaining available balance for the federal funds lines | $ 997,000 |  | $ 997,000 |  |
Maximum collateral dependent line of credit with the FHLB | 6,000,000 |  |  |  |
Trust Preferred Capital Securities | 150,500 |  | 150,500 |  |
Fair value discount | 16,154 |  | 16,435 |  |
Subordinated Debt | 250,000 |  | 250,000 |  |
Long-term debt, early repayments | 0 | $ 214,695 |  |  |
Remaining borrowing capacity | 25,000 |  | 25,000 |  |
Acquired Trust Preferred Capital Notes |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |
Fair value discount | 13,100 |  | 13,300 |  |
2026 Subordinate Debt |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |
Subordinated Debt |  |  |  | $ 150,000 |
Stated percentage on debt instrument |  |  |  | 5.00% |
2031 Subordinate Debt |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |
Proceeds from issuance of long-term borrowings |  |  | 246,900 |  |
Subordinated Debt | $ 250,000 |  | $ 250,000 |  |
Stated percentage on debt instrument | 2.875% |  | 2.875% |  |
Maturity date | Dec. 15, 2031 |  | Dec. 15, 2031 |  |
Previous bank acquisitions | Trust Preferred Capital Notes |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |
Trust Preferred Capital Securities | $ 58,500 |  |  |  |
Previous bank acquisitions | Acquired Trust Preferred Capital Notes |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |
Trust Preferred Capital Securities | $ 87,000 |  |  |  |
Access National Bank | Acquired Trust Preferred Capital Notes |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |
Trust Preferred Capital Securities |  |  |  |  | $ 5,000

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