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Derivative Financial Instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Non-hedging derivative financial instruments |  |
Derivative Financial Instruments |  |
Notional or contractual amount | $ 601,125 | $ 582,939
Asset derivatives, Fair value | 17,180 | 9,919
Liability derivatives, Fair value | 17,641 | 10,044
Interest rate swap contracts |  |
Derivative Financial Instruments |  |
Asset derivatives, Fair value | 17,245 | 10,016
Interest rate swap contracts | Non-hedging derivative financial instruments |  |
Derivative Financial Instruments |  |
Notional or contractual amount | 562,698 | 554,083
Asset derivatives, Fair value | 17,012 | 9,859
Liability derivatives, Fair value | 17,334 | 10,044
Loan commitments | Non-hedging derivative financial instruments |  |
Derivative Financial Instruments |  |
Notional or contractual amount | 13,349 | 12,440
Asset derivatives, Fair value | 168 | 47
Liability derivatives, Fair value | 0 | 0
Forward contracts - mortgage loan | Non-hedging derivative financial instruments |  |
Derivative Financial Instruments |  |
Notional or contractual amount | 25,078 | 16,416
Asset derivatives, Fair value | 0 | 13
Liability derivatives, Fair value | $ 307 | $ 0

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