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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Offsetting Financial Liabilities and Derivative Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Offsetting of Financial Liabilities and Derivative Liabilities |  |
Gross amounts not offset in the Statements of Condition, cash collateral pledged | $ 2,600 |
Interest rate swaps |  |
Offsetting of Financial Liabilities and Derivative Liabilities |  |
Gross amounts of recognized liabilities | (18,812) | $ (14,152)
Gross amounts offset in the Statements of Condition | 1,419 | 2,837
Net amounts of liabilities presented in the Statements of Condition | (17,393) | (11,315)
Gross amounts not offset in the Statements of Condition, financial instruments | 0 | 3,982
Gross amounts not offset in the Statements of Condition, cash collateral pledged | 2,097 | 1,960
Net amount | (15,296) | (5,373)
Interest rate swaps | Institutional counterparties |  |
Offsetting of Financial Liabilities and Derivative Liabilities |  |
Gross amounts of recognized liabilities | (3,359) | (8,777)
Gross amounts offset in the Statements of Condition | 1,262 | 2,835
Net amounts of liabilities presented in the Statements of Condition | (2,097) | (5,942)
Gross amounts not offset in the Statements of Condition, financial instruments | 0 | 3,982
Gross amounts not offset in the Statements of Condition, cash collateral pledged | 2,097 | 1,960
Net amount | 0 | 0
Interest rate swaps | Commercial counterparties |  |
Offsetting of Financial Liabilities and Derivative Liabilities |  |
Gross amounts of recognized liabilities | (15,453) | (5,375)
Gross amounts offset in the Statements of Condition | 157 | 2
Net amounts of liabilities presented in the Statements of Condition | (15,296) | (5,373)
Gross amounts not offset in the Statements of Condition, financial instruments | 0 | 0
Gross amounts not offset in the Statements of Condition, cash collateral pledged | 0 | 0
Net amount | $ (15,296) | $ (5,373)

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