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Fair Value Measurements (Details 2) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Assets: |  |
Investment securities, available-for-sale | $ 942,076 | $ 904,033
Mortgages held for sale | 8,626 | 13,123
U.S. Treasury and Federal agencies securities |  |
Assets: |  |
Investment securities, available-for-sale | 502,997 | 468,119
U.S. States and political subdivisions securities |  |
Assets: |  |
Investment securities, available-for-sale | 97,985 | 116,000
Mortgage-backed securities - Federal agencies |  |
Assets: |  |
Investment securities, available-for-sale | 296,330 | 287,910
Corporate debt securities |  |
Assets: |  |
Investment securities, available-for-sale | 44,056 | 31,294
Foreign government and other securities |  |
Assets: |  |
Investment securities, available-for-sale | 708 | 710
Total |  |
Assets: |  |
Investment securities, available-for-sale | 942,076 | 904,033
Mortgages held for sale | 8,626 | 13,123
Level 1 |  |
Assets: |  |
Investment securities, available-for-sale | 27,726 | 27,971
Mortgages held for sale | 0 | 0
Level 2 |  |
Assets: |  |
Investment securities, available-for-sale | 911,487 | 873,197
Mortgages held for sale | 8,626 | 13,123
Level 3 |  |
Assets: |  |
Investment securities, available-for-sale | 2,863 | 2,865
Mortgages held for sale | 0 | 0
Recurring basis | Total |  |
Assets: |  |
Investment securities, available-for-sale | 942,076 | 904,033
Mortgages held for sale | 8,626 | 13,123
Total | 956,044 | 922,323
Liabilities: |  |
Total | 5,439 | 5,262
Recurring basis | Total | Interest rate swap contracts |  |
Assets: |  |
Accrued income and other assets | 5,342 | 5,167
Liabilities: |  |
Accrued expenses and other liabilities | 5,439 | 5,262
Recurring basis | Total | U.S. Treasury and Federal agencies securities |  |
Assets: |  |
Investment securities, available-for-sale | 502,997 | 468,119
Recurring basis | Total | U.S. States and political subdivisions securities |  |
Assets: |  |
Investment securities, available-for-sale | 97,985 | 116,000
Recurring basis | Total | Mortgage-backed securities - Federal agencies |  |
Assets: |  |
Investment securities, available-for-sale | 296,330 | 287,910
Recurring basis | Total | Corporate debt securities |  |
Assets: |  |
Investment securities, available-for-sale | 44,056 | 31,294
Recurring basis | Total | Foreign government and other securities |  |
Assets: |  |
Investment securities, available-for-sale | 708 | 710
Recurring basis | Level 1 |  |
Assets: |  |
Investment securities, available-for-sale | 27,726 | 27,971
Mortgages held for sale | 0 | 0
Total | 27,726 | 27,971
Liabilities: |  |
Total | 0 | 0
Recurring basis | Level 1 | Interest rate swap contracts |  |
Assets: |  |
Accrued income and other assets | 0 | 0
Liabilities: |  |
Accrued expenses and other liabilities | 0 | 0
Recurring basis | Level 1 | U.S. Treasury and Federal agencies securities |  |
Assets: |  |
Investment securities, available-for-sale | 27,726 | 27,971
Recurring basis | Level 1 | U.S. States and political subdivisions securities |  |
Assets: |  |
Investment securities, available-for-sale | 0 | 0
Recurring basis | Level 1 | Mortgage-backed securities - Federal agencies |  |
Assets: |  |
Investment securities, available-for-sale | 0 | 0
Recurring basis | Level 1 | Corporate debt securities |  |
Assets: |  |
Investment securities, available-for-sale | 0 | 0
Recurring basis | Level 1 | Foreign government and other securities |  |
Assets: |  |
Investment securities, available-for-sale | 0 | 0
Recurring basis | Level 2 |  |
Assets: |  |
Investment securities, available-for-sale | 911,487 | 873,197
Mortgages held for sale | 8,626 | 13,123
Total | 925,455 | 891,487
Liabilities: |  |
Total | 5,439 | 5,262
Recurring basis | Level 2 | Interest rate swap contracts |  |
Assets: |  |
Accrued income and other assets | 5,342 | 5,167
Liabilities: |  |
Accrued expenses and other liabilities | 5,439 | 5,262
Recurring basis | Level 2 | U.S. Treasury and Federal agencies securities |  |
Assets: |  |
Investment securities, available-for-sale | 475,271 | 440,148
Recurring basis | Level 2 | U.S. States and political subdivisions securities |  |
Assets: |  |
Investment securities, available-for-sale | 95,830 | 113,845
Recurring basis | Level 2 | Mortgage-backed securities - Federal agencies |  |
Assets: |  |
Investment securities, available-for-sale | 296,330 | 287,910
Recurring basis | Level 2 | Corporate debt securities |  |
Assets: |  |
Investment securities, available-for-sale | 44,056 | 31,294
Recurring basis | Level 2 | Foreign government and other securities |  |
Assets: |  |
Investment securities, available-for-sale | 0 | 0
Recurring basis | Level 3 |  |
Assets: |  |
Investment securities, available-for-sale | 2,863 | 2,865
Mortgages held for sale | 0 | 0
Total | 2,863 | 2,865
Liabilities: |  |
Total | 0 | 0
Recurring basis | Level 3 | Interest rate swap contracts |  |
Assets: |  |
Accrued income and other assets | 0 | 0
Liabilities: |  |
Accrued expenses and other liabilities | 0 | 0
Recurring basis | Level 3 | U.S. Treasury and Federal agencies securities |  |
Assets: |  |
Investment securities, available-for-sale | 0 | 0
Recurring basis | Level 3 | U.S. States and political subdivisions securities |  |
Assets: |  |
Investment securities, available-for-sale | 2,155 | 2,155
Recurring basis | Level 3 | Mortgage-backed securities - Federal agencies |  |
Assets: |  |
Investment securities, available-for-sale | 0 | 0
Recurring basis | Level 3 | Corporate debt securities |  |
Assets: |  |
Investment securities, available-for-sale | 0 | 0
Recurring basis | Level 3 | Foreign government and other securities |  |
Assets: |  |
Investment securities, available-for-sale | $ 708 | $ 710

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