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Securities (Details 4) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Available-for-sale securities, Amortized Cost |  |
Total | $ 1,441,724 | $ 1,389,255
Available-for-sale securities, Fair value |  |
Total | 1,428,617 | 1,384,750
Total debt securities |  |
Available-for-sale securities, Amortized Cost |  |
Due in one year or less | 17,878 | 53,936
Due after one year through five years | 376,777 | 351,462
Due after five years through ten years | 210,985 | 219,161
Due after ten years | 13,827 | 13,098
Total | 619,467 | 637,657
Available-for-sale securities, Fair value |  |
Due in one year or less | 18,034 | 54,735
Due after one year through five years | 378,631 | 353,736
Due after five years through ten years | 208,999 | 218,561
Due after ten years | 13,181 | 12,749
Total | 618,845 | 639,781
Mortgage-backed securities |  |
Available-for-sale securities, Amortized Cost |  |
Total | 822,257 | 751,598
Available-for-sale securities, Fair value |  |
Total | $ 809,772 | $ 744,969

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