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Derivatives - Derivative Assets And Collateral Received (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Derivative [Line Items] |  |
Gross amounts of recognized assets | $ 81,475 | $ 81,634
Derivative assets not subject to master netting agreements | 28,900 | 10,200
Derivatives, interest rate contracts |  |
Derivative [Line Items] |  |
Collateral Received | (39,637) | (51,271)
Net amount | 180 | 2,909
Derivatives, interest rate contracts | Subject to Master Netting Agreements |  |
Derivative [Line Items] |  |
Gross amounts of recognized assets | 52,562 | 71,458
Gross amounts offset in the Statements of Condition | 0 | 0
Net amounts of assets presented in the Statements of Condition | 52,562 | 71,458
Gross amounts not offset in the Statements of Condition, Derivative liabilities available for offset | $ (12,745) | $ (17,278)

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