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Investment Securities - Maturities (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Held-to-maturity Securities, Amortized Cost |  |
Within one year | $ 2,092 | $ 13,473
After one but within five years | 15,206 | 16,706
After five years through ten years | 56,607 | 3,000
After ten years | 81,217 | 11,259
Total | 155,122 | 44,438
Held-to-maturity Securities, Fair Value |  |
Within one year | 2,132 | 13,506
After one but within five years | 15,565 | 17,150
After five years through ten years | 56,979 | 3,125
After ten years | 81,473 | 11,316
Total | 156,149 | 45,097
Available-for-sale Securities, Amortized Cost |  |
Within one year | 8,884 | 20,136
After one but within five years | 67,085 | 58,334
After five years through ten years | 101,756 | 113,576
After ten years | 79,743 | 186,208
Total | 257,468 | 378,254
Available-for-sale Securities, Fair Value |  |
Within one year | 8,893 | 20,109
After one but within five years | 67,065 | 58,267
After five years through ten years | 101,880 | 110,842
After ten years | 80,254 | 183,362
Total | $ 258,092 | $ 372,580

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