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FAIR VALUES OF FINANCIAL INSTRUMENTS: (Details 4) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | --- | ---
Carrying amount and estimated fair value of financial instruments |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held | $ 13,995 | $ 14,050 | $ 14,079 | $ 14,983
Securities available-for-sale | 891,082 | 897,053 |  |
Restricted Stock | 10,838 | 16,404 |  |
Accrued interest receivable | 11,733 | 11,593 |  |
Deposits | (2,442,369) | (2,457,197) |  |
Level 1 |  |  |  |
Carrying amount and estimated fair value of financial instruments |  |  |  |
Cash and due from banks | 19,715 | 22,597 |  |
Securities available-for-sale | 0 | 0 |  |
Level 2 |  |  |  |
Carrying amount and estimated fair value of financial instruments |  |  |  |
Cash and due from banks | 68,980 | 55,505 |  |
Federal funds sold | 9,815 | 8,000 |  |
Securities available-for-sale | 871,482 | 875,850 |  |
Accrued interest receivable | 3,366 | 3,183 |  |
Deposits | (2,442,612) | (2,459,703) |  |
Short-term borrowings | (33,831) | (48,015) |  |
Federal Home Loan Bank advances | (12,971) | (13,605) |  |
Accrued interest payable | (389) | (456) |  |
Level 3 |  |  |  |
Carrying amount and estimated fair value of financial instruments |  |  |  |
Securities available-for-sale | 19,600 | 21,203 |  |
Loans, net | 1,789,938 | 1,810,885 |  |
Accrued interest receivable | 8,367 | 8,410 |  |
Reported Value Measurement [Member] |  |  |  |
Carrying amount and estimated fair value of financial instruments |  |  |  |
Cash and due from banks | 88,695 | 78,102 |  |
Federal funds sold | 9,815 | 8,000 |  |
Securities available-for-sale | 891,082 | 897,053 |  |
Restricted Stock | 10,838 | 16,404 |  |
Loans, net | 1,743,862 | 1,762,589 |  |
Accrued interest receivable | 11,733 | 11,593 |  |
Deposits | (2,442,369) | (2,457,197) |  |
Short-term borrowings | (33,831) | (48,015) |  |
Federal Home Loan Bank advances | (12,677) | (12,886) |  |
Accrued interest payable | (389) | (456) |  |
Estimate of Fair Value Measurement [Member] |  |  |  |
Carrying amount and estimated fair value of financial instruments |  |  |  |
Cash and due from banks | 88,695 | 78,102 |  |
Federal funds sold | 9,815 | 8,000 |  |
Securities available-for-sale | 891,082 | 897,053 |  |
Loans, net | 1,789,938 | 1,810,885 |  |
Accrued interest receivable | 11,733 | 11,593 |  |
Deposits | (2,442,612) | (2,459,703) |  |
Short-term borrowings | (33,831) | (48,015) |  |
Federal Home Loan Bank advances | (12,971) | (13,605) |  |
Accrued interest payable | $ (389) | $ (456) |  |

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