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Fair Value of Assets & Liabilities - Gains/(losses) on Nonrecurring Fair Value Measurements (Details) - Non Recurring - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Loans, net of unearned income | $ 363 | $ (2,388) | $ 1,020 | $ (1,456)
OREO | (776) | (41) | (2,198) | (662)
Other assets | (1,370) | (762) | (3,586) | (2,646)
Total | (2,993) | (3,271) | (7,221) | (6,001)
Loans held-for-sale—first mortgages |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Loans held-for-sale | 3 | 6 | 7 | 22
Loans held-for-sale—SBAs and USDA |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Loans held-for-sale | $ (1,213) | $ (86) | $ (2,464) | $ (1,259)

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