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Investment Securities - Schedule Of Amortized Cost And Fair Value By Contractual Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Held-to-Maturity, Amortized Cost |  |
Within 1 year | $ 0 |
After 1 year; within 5 years | 0 |
After 5 years; within 10 years | 10,000 |
After 10 years | 0 |
Subtotal | 10,000 |
Government agency issued MBS and CMO | 0 |
Total | 10,000 | $ 10,000
Held-to-Maturity, Fair Value |  |
Within 1 year | 0 |
After 1 year; within 5 years | 0 |
After 5 years; within 10 years | 9,889 |
After 10 years | 0 |
Subtotal | 9,889 |
Government agency issued MBS and CMO | 0 |
Securities held to maturity, fair value | 9,889 | 9,843
Available-for-Sale, Amortized Cost |  |
Within 1 year | 15,060 |
After 1 year; within 5 years | 229,373 |
After 5 years; within 10 years | 755 |
After 10 years | 37,273 |
Subtotal | 282,461 |
Government agency issued MBS and CMO | 4,356,706 |
Securities available for sale, amortized cost | 4,639,167 |
Available-for-Sale, Fair Value |  |
Within 1 year | 14,998 |
After 1 year; within 5 years | 231,160 |
After 5 years; within 10 years | 3,825 |
After 10 years | 48,746 |
Subtotal | 298,729 |
Government agency issued MBS and CMO | 4,317,593 |
Securities available-for-sale | $ 4,616,322 | $ 4,626,470

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