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LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Summary of Aging of the Loan Portfolio by Class) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | $ 8,247 | $ 9,132 |
Greater than 90 Days and still Accruing, % of total loans | 0.06% | 0.07% |
Nonaccrual | $ 29,032 | $ 31,100 | $ 42,448
Nonaccrual, % of total loans | 0.22% | 0.24% |
Total Loans | $ 13,459,349 | $ 13,195,843 |
Total loans, % of total loans | 100.00% | 100.00% |
Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | $ 13,400,748 | $ 13,134,805 |
Current, % of total loans | 99.56% | 99.54% |
30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | $ 17,955 | $ 15,094 |
Past Due, % of total loans | 0.13% | 0.11% |
60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | $ 3,367 | $ 5,712 |
Past Due, % of total loans | 0.03% | 0.04% |
Construction and Land Development |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | $ 1 | $ 299 |
Nonaccrual | 869 | 2,697 | 3,072
Total Loans | 969,059 | 862,236 |
Construction and Land Development | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 968,019 | 857,883 |
Construction and Land Development | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 170 | 1,357 |
Construction and Land Development | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 0 | 0 |
Commercial Real Estate - Owner Occupied |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | 2,396 | 1,257 |
Nonaccrual | 4,865 | 5,637 | 7,128
Total Loans | 2,007,671 | 1,995,409 |
Commercial Real Estate - Owner Occupied | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 1,995,329 | 1,987,133 |
Commercial Real Estate - Owner Occupied | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 5,081 | 1,230 |
Commercial Real Estate - Owner Occupied | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 0 | 152 |
Commercial Real Estate - Non-Owner Occupied |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | 1,735 | 433 |
Nonaccrual | 3,287 | 3,641 | 2,317
Total Loans | 3,875,681 | 3,789,377 |
Commercial Real Estate - Non-Owner Occupied | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 3,870,357 | 3,783,211 |
Commercial Real Estate - Non-Owner Occupied | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 79 | 1,965 |
Commercial Real Estate - Non-Owner Occupied | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 223 | 127 |
Multifamily Real Estate |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | 0 | 0 |
Nonaccrual | 0 | 113 | 33
Total Loans | 723,940 | 778,626 |
Multifamily Real Estate | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 723,816 | 778,429 |
Multifamily Real Estate | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 124 | 84 |
Multifamily Real Estate | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 0 | 0 |
Commercial and Industrial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | 763 | 1,897 |
Nonaccrual | 1,975 | 1,647 | 2,107
Total Loans | 2,540,680 | 2,542,243 |
Commercial and Industrial | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 2,535,815 | 2,536,100 |
Commercial and Industrial | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 1,382 | 1,161 |
Commercial and Industrial | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 745 | 1,438 |
Residential 1-4 Family - Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | 878 | 990 |
Nonaccrual | 2,239 | 2,285 | 9,993
Total Loans | 569,801 | 607,337 |
Residential 1-4 Family - Commercial | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 565,606 | 601,946 |
Residential 1-4 Family - Commercial | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 827 | 1,844 |
Residential 1-4 Family - Commercial | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 251 | 272 |
Residential 1-4 Family - Mortgage |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | 1,147 | 3,013 |
Nonaccrual | 12,039 | 11,397 | 12,600
Total Loans | 824,163 | 816,524 |
Residential 1-4 Family - Mortgage | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 804,069 | 795,821 |
Total Loans | 804,069 | 795,821 |
Residential 1-4 Family - Mortgage | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 5,890 | 3,368 |
Total Loans | 5,890 | 3,368 |
Residential 1-4 Family - Mortgage | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 1,018 | 2,925 |
Total Loans | 1,018 | 2,925 |
Residential 1-4 Family - Mortgage | Greater Than 90 Days and still Accruing |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 1,147 | 3,013 |
Residential 1-4 Family - Mortgage | Nonaccrual |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 12,039 | 11,397 |
Residential 1-4 Family - Revolving |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | 1,065 | 882 |
Nonaccrual | 3,371 | 3,406 | 4,629
Total Loans | 568,403 | 560,796 |
Residential 1-4 Family - Revolving | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 562,159 | 554,652 |
Total Loans | 562,159 | 554,652 |
Residential 1-4 Family - Revolving | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 1,157 | 1,493 |
Total Loans | 1,157 | 1,493 |
Residential 1-4 Family - Revolving | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 651 | 363 |
Total Loans | 651 | 363 |
Residential 1-4 Family - Revolving | Greater Than 90 Days and still Accruing |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 1,065 | 882 |
Residential 1-4 Family - Revolving | Nonaccrual |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 3,371 | 3,406 |
Auto |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | 192 | 241 |
Nonaccrual | 333 | 223 | 500
Total Loans | 499,855 | 461,052 |
Auto | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 497,639 | 458,473 |
Total Loans | 497,639 | 458,473 |
Auto | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 1,508 | 1,866 |
Total Loans | 1,508 | 1,866 |
Auto | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 183 | 249 |
Total Loans | 183 | 249 |
Auto | Greater Than 90 Days and still Accruing |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 192 | 241 |
Auto | Nonaccrual |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 333 | 223 |
Consumer |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | 70 | 120 |
Nonaccrual | 54 | 54 | $ 69
Total Loans | 171,875 | 176,992 |
Consumer | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 171,083 | 175,943 |
Total Loans | 171,083 | 175,943 |
Consumer | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 467 | 689 |
Total Loans | 467 | 689 |
Consumer | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 201 | 186 |
Total Loans | 201 | 186 |
Consumer | Greater Than 90 Days and still Accruing |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 70 | 120 |
Consumer | Nonaccrual |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Total Loans | 54 | 54 |
Other Commercial |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Greater Than 90 Days and Still Accruing | 0 | 0 |
Nonaccrual | 0 | 0 |
Total Loans | 708,221 | 605,251 |
Other Commercial | Current |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 706,856 | 605,214 |
Other Commercial | 30 to 59 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | 1,270 | 37 |
Other Commercial | 60 to 89 Days Past Due |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
Loans receivable, current and past due | $ 95 | $ 0 |

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