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LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Narrative) (Details) | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2021 USD ($) loan | Sep. 30, 2020 USD ($) loan | Jun. 30, 2021 USD ($) loan | Sep. 30, 2021 USD ($) loan | Sep. 30, 2020 USD ($) loan | Dec. 31, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
SBA PPP Loans, Total Originations, Number of Loans | loan |  |  | 3,034 | 1,620 |  |
SBA PPP Loans, Total Originations |  |  | $ 244,800,000 | $ 102,200,000 |  |
Loans and Leases Receivable, Related Parties, Description |  |  | At September 30, 2021 and December 31, 2020, outstanding loans to certain officers, directors and their associated companies was less than 5% of the Company's shareholders' equity. | At September 30, 2021 and December 31, 2020, outstanding loans to certain officers, directors and their associated companies was less than 5% of the Company's shareholders' equity. |  |
Proceeds from the sale of mortgage loans |  |  |  | $ 400,812,000 | $ 460,130,000 |
Gain on sale of mortgage loans |  |  |  | (11,260,000) | (10,385,000) |
Loans held for sale, at fair value (book value of $10,789 and $40,499, respectively) | $ 10,826,000 |  |  | 10,826,000 |  | $ 41,557,000
Allowance for Loan and Lease Losses, Period Increase (Decrease) |  | $ (32,300,000) |  | $ 5,600,000 |  |
Other industry exposures |  |  |  | 0 |  |
Temporary Loan Modifications, COVID-Related Loan Modification, Recorded Investment | 0 |  |  | $ 0 |  | 26,500,000
Non-Accrual Loans | 5,072,000 |  |  | 5,072,000 |  | 7,596,000
Loans outstanding | 3,315,303,000 |  |  | 3,315,303,000 |  | 3,219,822,000
Interest lost on nonaccrual loans | 59,000 | $ 85,000 |  | 202,000 | $ 251,000 |
Loans and Leases Receivable, Excluded Accrued Interest from Amortized Cost | 8,000,000 |  |  | 8,000,000 |  | 10,200,000
Recorded Investment | 2,783,000 |  |  | 2,783,000 |  | 3,066,000
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 0 |  |  | $ 0 |  | 0
Loans modified | loan | 0 | 0 |  | 0 | 0 |
FHLB advances, general debt obligations, pledged collateral | $ 1,200,000,000 |  |  | $ 1,200,000,000 |  | 1,300,000,000
SBA PPP Loans, 2021 Originations, Outstanding | loan | 1,230 |  |  | 1,230 |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | $ 796,413,000 |  |  | $ 796,413,000 |  | 716,230,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | $ 595,765,000 |  |  | $ 595,765,000 |  | 527,204,000
SBA PPP Loans, 2020 Originations, Number of Contracts Outstanding | loan | 120 |  |  | 120 |  |
CARES Act |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Accrual Loans | $ 1,000,000 |  |  | $ 1,000,000 |  | 457,000
CARES Act | 30 to 89 days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans outstanding | 310,000 |  |  | 310,000 |  | 1,200,000
SBA PPP Portfolio Segment |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans outstanding | 81,959,000 |  |  | 81,959,000 |  | 135,095,000
Residential Real Estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Accrual Loans | 2,576,000 |  |  | 2,576,000 |  | 3,477,000
Loans outstanding | 1,222,084,000 |  |  | 1,222,084,000 |  | 1,054,798,000
Mortgage Loans in Process of Foreclosure, Amount | 1,100,000 |  |  | 1,100,000 |  | 1,500,000
Commercial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Accrual Loans | 860,000 |  |  | 860,000 |  | 1,607,000
Loans outstanding | 352,533,000 |  |  | 352,533,000 |  | 381,494,000
Home Equity |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Accrual Loans | 1,401,000 |  |  | 1,401,000 |  | 1,996,000
Loans outstanding | 218,797,000 |  |  | 218,797,000 |  | 258,573,000
Consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Accrual Loans | 28,000 |  |  | 28,000 |  | 4,000
Loans outstanding | 20,253,000 |  |  | 20,253,000 |  | 20,392,000
Fixed Rate Residential Mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Proceeds from the sale of mortgage loans | 86,200,000 | $ 182,700,000 |  | 389,600,000 | $ 449,700,000 |
Gain on sale of mortgage loans | (2,200,000) | (4,300,000) |  | (11,300,000) | (10,400,000) |
Loans held for sale, at fair value (book value of $10,789 and $40,499, respectively) | 10,800,000 |  |  | 10,800,000 |  | 40,500,000
Commercial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Recorded Investment | 80,000 |  |  | 80,000 |  | 100,000
Financing Receivable, Year One, Originated, Current Fiscal Year | 60,833,000 |  |  | 60,833,000 |  | 54,153,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 48,063,000 |  |  | 48,063,000 |  | 73,897,000
SBA PPP Portfolio Segment |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 78,721,000 |  |  | 78,721,000 |  | 135,095,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 3,238,000 |  |  | 3,238,000 |  | 0
Nonoperating Income (Expense) | Fixed Rate Residential Mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gain on sale of mortgage loans | 216,000 | 47,000 |  | $ 1,000,000 | $ (695,000) |
Unrealized gain (loss) on loans held for sale | 37,000 | $ 1,100,000 |  |  |  |
Non-Residential Building Operators Industry Sector | Loan Concentration Risk | Total Loan Portfolio |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Concentration risk (percentage) |  |  |  | 14.00% |  |
Non-Residential Building Operators Industry Sector | Loan Concentration Risk | Commercial Real Estate(1) |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Concentration risk (percentage) |  |  |  | 32.00% |  |
Substandard [Member] | Commercial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |  |  | $ 0 |  | 187,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 280,000 |  |  | 280,000 |  | 1,012,000
Substandard [Member] | SBA PPP Portfolio Segment |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Financing Receivable, Year One, Originated, Current Fiscal Year | 0 |  |  | 0 |  | 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year | 0 |  |  | 0 |  | 0
Performing Financial Instruments [Member] | Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Recorded Investment | 2,600,000 |  |  | 2,600,000 |  | 2,800,000
Nonperforming Financial Instruments [Member] | Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Recorded Investment | $ 219,000 |  |  | $ 219,000 |  | $ 248,000

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- Definition The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121581245&loc=d3e21310-158488 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121581245&loc=d3e21286-158488 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=117337389&loc=d3e21493-158490 + Details
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