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FAIR VALUE DISCLOSURES (Additional Information) (Details) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Mortgage servicing rights | $ 4,500,000 |  |  |
Weighted average interest rate, residential mortgages (in hundredths) | 3.93% |  |  |
Weighted average maturity of residential mortgages | 20 years |  |  |
Prepayment Speed used in unobservable assumptions | 77 | 81 |  |
Discount rate used to estimate fair value (in hundredths) | 9.40% | 9.40% |  |
Subtotal | $ 3,940,652,000 |  | $ 3,916,326,000 |
Valuation allowance | 49,562,000 | $ 45,627,000 | $ 48,453,000 | $ 47,121,000
Provision for Loan and Lease Losses | $ 1,200,000 | 3,300,000 |  |
Charge Off |  | 4,200,000 |  |
Commercial Real Estates [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 0.00% |  |  |
Commercial Real Estates [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 50.00% |  |  |
Inventory Finished Goods [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 35.00% |  |  |
Inventory Finished Goods [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 65.00% |  |  |
Finished Goods [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 30.00% |  |  |
Finished Goods [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 60.00% |  |  |
Inventory Work In Process [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 50.00% |  |  |
Inventory Work In Process [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 100.00% |  |  |
Equipment [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 30.00% |  |  |
Equipment [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 70.00% |  |  |
Marketable Securities [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 10.00% |  |  |
Marketable Securities [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Percentage of discount from appraised value (in hundredths) | 30.00% |  |  |
Impaired Loans [Member] |  |  |  |
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |  |  |  |
Subtotal | $ 19,100,000 | 7,900,000 |  |
Valuation allowance | 9,300,000 | $ 1,900,000 |  |
Provision for Loan and Lease Losses | $ 200,000 |  |  |

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