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Derivative Liabilities and Collateral Pledged (Details) - USD ($) | Sep. 30, 2015 | Dec. 31, 2014 | Sep. 30, 2014
--- | --- | --- | ---
Derivative [Line Items] |  |  |  |
Gross amounts of recognized liabilities |  | $ 140,965,000 | $ 119,239,000 | $ 123,442,000
Derivative Liabilities not subject to master netting agreements |  | 20,700,000 |  | 10,500,000
Derivatives, Interest Rate Contracts | Subject to Master Netting Agreements |  |  |  |
Derivative [Line Items] |  |  |  |
Gross amounts of recognized liabilities | [1] | 120,234,000 |  | 112,901,000
Gross amounts offset in the Statement of Condition | [1] | 0 |  | 0
Net amounts of liabilities presented in the Statement of Condition | [1],[2] | 120,234,000 |  | 112,901,000
Derivative assets available for offset | [1] | (9,748,000) |  | (24,210,000)
Collateral pledged | [1] | (78,211,000) |  | (77,755,000)
Net amount | [1] | $ 32,275,000 |  | $ 10,936,000
[1] | 2015 and 2014 are comprised entirely of interest rate derivative contracts.
[2] | In cluded in Derivative l iabilities on the Consolidated Condensed Statements of Condition. As of September 30 , 201 5 and 201 4 , $ 20 . 7 million and $ 10.5 million, respectively, of derivative liabilities (primarily fixed income forward contracts) have been excluded from these tables because they are generally not subject to master netting or similar agreements.

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