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FAIR VALUE MEASUREMENTS - Measured on Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | $ 718,559 | $ 717,242
Obligations of US Government sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 6,977 | 6,972
US Government-sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 449,175 | 443,003
US Government agency |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 90,396 | 95,596
Private label |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 616 | 674
Obligations of states and political subdivisions thereof |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 135,277 | 140,200
Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 36,118 | 30,797
Total Fair Value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 718,559 | 717,242
Derivative assets | 1,222 | 669
Derivative liabilities | (51) | (222)
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Derivative assets | 0 | 0
Derivative liabilities | 0 | 0
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 718,559 | 717,242
Derivative assets | 1,215 | 669
Derivative liabilities | 0 | 0
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Derivative assets | 7 | 0
Derivative liabilities | (51) | (222)
Recurring | Total Fair Value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value |  | 669
Derivative assets | 1,222 | (222)
Derivative liabilities | (51) |
Recurring | Total Fair Value | Obligations of US Government sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 6,977 | 6,972
Recurring | Total Fair Value | US Government-sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 449,175 | 443,003
Recurring | Total Fair Value | US Government agency |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 90,396 | 95,596
Recurring | Total Fair Value | Private label |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 616 | 674
Recurring | Total Fair Value | Obligations of states and political subdivisions thereof |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 135,277 | 140,200
Recurring | Total Fair Value | Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 36,118 | 30,797
Recurring | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value |  | 0
Derivative assets | 0 |
Derivative liabilities | 0 |
Recurring | Level 1 | Obligations of US Government sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | US Government-sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | US Government agency |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | Private label |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | Obligations of states and political subdivisions thereof |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 1 | Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value |  | 669
Derivative assets | 1,215 |
Derivative liabilities | 0 |
Recurring | Level 2 | US Government-sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 449,175 | 443,003
Recurring | Level 2 | US Government agency |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 90,396 | 95,596
Recurring | Level 2 | Private label |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 616 | 674
Recurring | Level 2 | Obligations of states and political subdivisions thereof |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 135,277 | 140,200
Recurring | Level 2 | Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 36,118 | 30,797
Recurring | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value |  | 0
Derivative assets | 7 | (222)
Derivative liabilities | (51) |
Recurring | Level 3 | Obligations of US Government sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | US Government-sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | US Government agency |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | Private label |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | Obligations of states and political subdivisions thereof |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | 0 | 0
Recurring | Level 3 | Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Securities available for sale, at fair value | $ 0 | $ 0

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