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Investment Securities - Unrealized Losses (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Fair Value |  |
Less than 12 months | $ 3,475 | $ 17,933
12 months or more | 117,084 | 174,791
Total | 120,559 | 192,724
Unrealized Losses |  |
Less than 12 months | (4) | (80)
12 months or more | (1,276) | (4,416)
Total | (1,280) | (4,496)
U.S. Treasury |  |
Fair Value |  |
Less than 12 months | 0 | 0
12 months or more | 0 | 1,952
Total | 0 | 1,952
Unrealized Losses |  |
Less than 12 months | 0 | 0
12 months or more | 0 | (32)
Total | 0 | (32)
U.S. government and federal agency obligations |  |
Fair Value |  |
Less than 12 months | 0 | 0
12 months or more | 8,303 | 9,966
Total | 8,303 | 9,966
Unrealized Losses |  |
Less than 12 months | 0 | 0
12 months or more | (41) | (269)
Total | (41) | (269)
Government sponsored enterprises |  |
Fair Value |  |
Less than 12 months | 499 | 1,997
12 months or more | 21,741 | 33,346
Total | 22,240 | 35,343
Unrealized Losses |  |
Less than 12 months | (1) | (3)
12 months or more | (85) | (469)
Total | (86) | (472)
Obligations of states and political subdivisions |  |
Fair Value |  |
Less than 12 months | 2,553 | 5,851
12 months or more | 15,609 | 28,832
Total | 18,162 | 34,683
Unrealized Losses |  |
Less than 12 months | (2) | (16)
12 months or more | (88) | (485)
Total | (90) | (501)
Mortgage-backed securities |  |
Fair Value |  |
Less than 12 months | 423 | 10,085
12 months or more | 70,128 | 99,321
Total | 70,551 | 109,406
Unrealized Losses |  |
Less than 12 months | (1) | (61)
12 months or more | (879) | (3,049)
Total | (880) | (3,110)
Other debt securities |  |
Fair Value |  |
Less than 12 months | 0 |
12 months or more | 0 |
Total | 0 |
Unrealized Losses |  |
Less than 12 months | 0 |
12 months or more | 0 |
Total | 0 |
Bank issued trust preferred securities |  |
Fair Value |  |
Less than 12 months | 0 | 0
12 months or more | 1,303 | 1,374
Total | 1,303 | 1,374
Unrealized Losses |  |
Less than 12 months | 0 | 0
12 months or more | (183) | (112)
Total | $ (183) | $ (112)

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