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FAIR VALUE MEASUREMENT AND DISCLOSURE (Schedule of Carrying Amounts and Estimated Fair Value for Financial Instrument Assets and Liabilities) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financial assets: |  |
Available-for-sale Securities | $ 799,000 | $ 789,899
Held-to-maturity securities, at amortized cost | 93,062 | 94,073
Held-to-maturity Securities, Fair Value | 91,601 | 94,913
Mortgage servicing rights | 1,851 | 1,766
Financial liabilities: |  |
Time deposits | 562,245 | 512,483
Short-term Debt, Fair Value | 591,376 | 541,605
Long-term Debt, Fair Value | 10,654 | 10,777
Subordinated debentures | 47,805 | 44,333
Residential Real Estate |  |
Financial assets: |  |
Loans receivable, net of allowance | 878,089 | 853,056
Commercial Real Estate |  |
Financial assets: |  |
Loans receivable, net of allowance | 1,136,054 | 1,115,618
Commercial |  |
Financial assets: |  |
Loans receivable, net of allowance | 416,096 | 401,902
Home Equity |  |
Financial assets: |  |
Loans receivable, net of allowance | 313,233 | 318,230
Consumer |  |
Financial assets: |  |
Loans receivable, net of allowance | 18,306 | 17,335
Readily Available Market Prices (Level 1) |  |
Financial assets: |  |
Held-to-maturity Securities, Fair Value | 0 | 0
Mortgage servicing rights | 0 | 0
Financial liabilities: |  |
Time deposits | 0 | 0
Short-term Debt, Fair Value | 0 | 0
Long-term Debt, Fair Value | 0 | 0
Subordinated debentures | 0 | 0
Readily Available Market Prices (Level 1) | Residential Real Estate |  |
Financial assets: |  |
Loans receivable, net of allowance | 0 | 0
Readily Available Market Prices (Level 1) | Commercial Real Estate |  |
Financial assets: |  |
Loans receivable, net of allowance | 0 | 0
Readily Available Market Prices (Level 1) | Commercial |  |
Financial assets: |  |
Loans receivable, net of allowance | 0 | 0
Readily Available Market Prices (Level 1) | Home Equity |  |
Financial assets: |  |
Loans receivable, net of allowance | 0 | 0
Readily Available Market Prices (Level 1) | Consumer |  |
Financial assets: |  |
Loans receivable, net of allowance | 0 | 0
Observable Market Data (Level 2) |  |
Financial assets: |  |
Held-to-maturity Securities, Fair Value | 91,601 | 94,913
Mortgage servicing rights | 0 | 0
Financial liabilities: |  |
Time deposits | 562,245 | 512,483
Short-term Debt, Fair Value | 591,376 | 541,605
Long-term Debt, Fair Value | 10,654 | 10,777
Subordinated debentures | 47,805 | 44,333
Observable Market Data (Level 2) | Residential Real Estate |  |
Financial assets: |  |
Loans receivable, net of allowance | 0 | 0
Observable Market Data (Level 2) | Commercial Real Estate |  |
Financial assets: |  |
Loans receivable, net of allowance | 0 | 0
Observable Market Data (Level 2) | Commercial |  |
Financial assets: |  |
Loans receivable, net of allowance | 0 | 0
Observable Market Data (Level 2) | Home Equity |  |
Financial assets: |  |
Loans receivable, net of allowance | 0 | 0
Observable Market Data (Level 2) | Consumer |  |
Financial assets: |  |
Loans receivable, net of allowance | 0 | 0
Company Determined Fair Value (Level 3) |  |
Financial assets: |  |
Held-to-maturity Securities, Fair Value | 0 | 0
Mortgage servicing rights | 1,851 | 1,766
Financial liabilities: |  |
Time deposits | 0 | 0
Short-term Debt, Fair Value | 0 | 0
Long-term Debt, Fair Value | 0 | 0
Subordinated debentures | 0 | 0
Company Determined Fair Value (Level 3) | Residential Real Estate |  |
Financial assets: |  |
Loans receivable, net of allowance | 878,089 | 853,056
Company Determined Fair Value (Level 3) | Commercial Real Estate |  |
Financial assets: |  |
Loans receivable, net of allowance | 1,136,054 | 1,115,618
Company Determined Fair Value (Level 3) | Commercial |  |
Financial assets: |  |
Loans receivable, net of allowance | 416,096 | 401,902
Company Determined Fair Value (Level 3) | Home Equity |  |
Financial assets: |  |
Loans receivable, net of allowance | 313,233 | 318,230
Company Determined Fair Value (Level 3) | Consumer |  |
Financial assets: |  |
Loans receivable, net of allowance | 18,306 | 17,335
Carrying Amount |  |
Financial assets: |  |
Held-to-maturity securities, at amortized cost | 93,062 | 94,073
Mortgage servicing rights | 909 | 1,025
Financial liabilities: |  |
Time deposits | 569,455 | 517,032
Short-term Debt, Fair Value | 591,648 | 541,796
Long-term Debt, Fair Value | 10,756 | 10,791
Subordinated debentures | 58,989 | 58,911
Carrying Amount | Residential Real Estate |  |
Financial assets: |  |
Loans receivable, net of allowance | 902,131 | 853,283
Carrying Amount | Commercial Real Estate |  |
Financial assets: |  |
Loans receivable, net of allowance | 1,179,742 | 1,152,160
Carrying Amount | Commercial |  |
Financial assets: |  |
Loans receivable, net of allowance | 421,688 | 413,898
Carrying Amount | Home Equity |  |
Financial assets: |  |
Loans receivable, net of allowance | 321,055 | 321,011
Carrying Amount | Consumer |  |
Financial assets: |  |
Loans receivable, net of allowance | $ 19,246 | $ 17,916

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