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LOANS AND ALLOWANCE FOR LOAN LOSSES (Narrative) (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 USD ($) loan | Jun. 30, 2018 USD ($) loan | Jun. 30, 2019 USD ($) loan | Jun. 30, 2018 USD ($) loan | Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans and Leases Receivable, Related Parties, Description |  |  | At June 30, 2019 and December 31, 2018, outstanding loans to certain officers, directors and their associated companies was less than 5% of the Company's shareholders' equity. |  | At June 30, 2019 and December 31, 2018, outstanding loans to certain officers, directors and their associated companies was less than 5% of the Company's shareholders' equity.
Other industry exposures |  |  | 0 |  |
Interest lost on nonaccrual loans | $ 115,000 | $ 174,000 | $ 224,000 | $ 336,000 |
Loans modified | loan | 0 | 1 | 0 | 1 |
Proceeds from the sale of mortgage loans |  |  | $ 79,575,000 | $ 99,778,000 |
Gain on sale of mortgage loans |  |  | 1,998,000 | 2,550,000 |
Loans held for sale, at fair value (book value of $13,088 and $4,314, respectively) | $ 13,113,000 |  | 13,113,000 |  | $ 4,403,000
FHLB advances, general debt obligations, pledged collateral | 1,200,000,000 |  | 1,200,000,000 |  | 1,100,000,000
Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans restructured due to credit difficulties that are now performing | 3,500,000 |  | 3,500,000 |  | 3,900,000
Financing receivables impaired TDR non-performing | 600,000 |  | 600,000 |  | 513,000
Residential Real Estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Mortgage Loans in Process of Foreclosure, Amount | 2,500,000 |  | 2,500,000 |  | 2,300,000
Fixed Rate Residential Mortgage |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Proceeds from the sale of mortgage loans | 49,600,000 | $ 52,000,000 | 77,600,000 | 97,200,000 |
Gain on sale of mortgage loans | 1,200,000 | $ 1,300,000 | 2,000,000 | $ 2,600,000 |
Loans held for sale, at fair value (book value of $13,088 and $4,314, respectively) | 13,100,000 |  | 13,100,000 |  | 4,300,000
Home Equity Loan [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans modified | loan |  | 1 |  | 1 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment |  | $ 299,000 |  | $ 299,000 |
Nonoperating Income (Expense) | Fixed Rate Residential Mortgage |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Gain on sale of mortgage loans | $ (60,000) | $ 23,000 | (64,000) | $ 32,000 |
Unrealized gain (loss) on loans held for sale |  |  | $ 25,000 |  | $ 89,000
Minimum |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Months | 18 |  | 18 |  |
Minimum | HPFC Portfolio Segment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Term to maturity | 7 years |  |  |  |
Maximum |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Months | 24 |  | 24 |  |
Maximum | HPFC Portfolio Segment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Term to maturity | 10 years |  |  |  |
Non-Residential Building Operators Industry Sector | Loan Concentration Risk | Total Loan Portfolio |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Concentration risk (percentage) |  |  | 12.00% |  |
Non-Residential Building Operators Industry Sector | Loan Concentration Risk | Commercial Real Estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Concentration risk (percentage) |  |  | 31.00% |  |

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