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Fair Value Measurements (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Investment securities | $ 722,674 | $ 589,268
Loans held for sale | 18,728 | 25,096
Other equity investments | 218 | 218
Assets measured at a fair value on a recurring basis | 747,909 | 616,663
Liabilities measured at a fair value on a recurring basis | 28 | 10
Interest Rate Swap [Member] |  |
Derivative asset | 6,461 | 2,201
Interest Rate Swap [Member] | Derivative Financial Instruments, Assets [Member] |  |
Derivative asset | 6,427 | 2,256
US Agency Securities [Member] |  |
Investment securities | 230,325 | 195,984
Residential Mortgage Backed Securities [Member] |  |
Investment securities | 436,349 | 317,836
Loans held for sale | 18,728 | 25,096
Municipal Bonds [Member] |  |
Investment securities | 47,736 | 62,057
Corporate Bonds [Member] |  |
Investment securities | 8,046 | 13,173
Mortgage Banking Derivative [Member] |  |
Derivative asset | 80 | 43
Derivative liability | 28 | 10
Fair Value, Inputs, Level 2 [Member] |  |
Investment securities | 720,956 | 587,550
Loans held for sale | 18,728 | 25,096
Assets measured at a fair value on a recurring basis | 746,111 | 614,902
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] |  |
Derivative asset | 6,427 | 2,256
Fair Value, Inputs, Level 2 [Member] | US Agency Securities [Member] |  |
Investment securities | 230,325 | 195,984
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member] |  |
Investment securities | 436,349 | 317,836
Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member] |  |
Investment securities | 47,736 | 62,057
Fair Value, Inputs, Level 2 [Member] | Corporate Bonds [Member] |  |
Investment securities | 6,546 | 11,673
Fair Value, Inputs, Level 3 [Member] |  |
Investment securities | 1,718 |
Other equity investments | 218 | 218
Assets measured at a fair value on a recurring basis | 1,798 | 1,761
Liabilities measured at a fair value on a recurring basis | 28 | 10
Fair Value, Inputs, Level 3 [Member] | Corporate Bonds [Member] |  |
Investment securities | 1,500 | 1,500
Fair Value, Inputs, Level 3 [Member] | Mortgage Banking Derivative [Member] |  |
Derivative asset | $ 80 | $ 43

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