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Securities (Schedule of Securities with Unrealized Losses) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months Fair Value | $ 2 | $ 94,322
Less than 12 Months Unrealized Loss | 0 | (887)
12 Months or More Fair Value | 372,191 | 405,289
12 Months or More Unrealized Loss | (7,724) | (13,192)
Total Fair Value | 372,193 | 499,611
Total Unrealized Loss | (7,724) | (14,079)
Obligations of State and Political Subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months Fair Value | 0 | 37,936
Less than 12 Months Unrealized Loss | 0 | (286)
12 Months or More Fair Value | 18,574 | 49,071
12 Months or More Unrealized Loss | (215) | (1,037)
Total Fair Value | 18,574 | 87,007
Total Unrealized Loss | (215) | (1,323)
MBS/CMO - Residential |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 Months Fair Value | 2 | 56,386
Less than 12 Months Unrealized Loss | 0 | (601)
12 Months or More Fair Value | 353,617 | 356,218
12 Months or More Unrealized Loss | (7,509) | (12,155)
Total Fair Value | 353,619 | 412,604
Total Unrealized Loss | $ (7,509) | $ (12,756)

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