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Securities (Schedule of Investments' Gross Unrealized Losses and Fair Value Aggregated by Security Type and Length of Time that Individual Securities have been in a Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Schedule of Investments [Line Items] |  |
Less than 12 Months, Fair Value | $ 2,520 | $ 29,629
Less than 12 Months, Unrealized Losses | (13) | (433)
12 Months or More, Fair Value | 181,331 | 186,285
12 Months or More, Unrealized Losses | (4,074) | (7,011)
Total, Fair Value | 183,851 | 215,914
Total, Unrealized Losses | (4,087) | (7,444)
States and Political Subdivisions [Member] |  |
Schedule of Investments [Line Items] |  |
Less than 12 Months, Fair Value | 773 | 19,140
Less than 12 Months, Unrealized Losses | (11) | (390)
12 Months or More, Fair Value | 52,523 | 56,740
12 Months or More, Unrealized Losses | (477) | (1,600)
Total, Fair Value | 53,296 | 75,880
Total, Unrealized Losses | (488) | (1,990)
Corporate Obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Less than 12 Months, Fair Value | 0 | 2,045
Less than 12 Months, Unrealized Losses | 0 | (21)
12 Months or More, Fair Value | 8,747 | 6,595
12 Months or More, Unrealized Losses | (107) | (235)
Total, Fair Value | 8,747 | 8,640
Total, Unrealized Losses | (107) | (256)
Mortgage-backed Securities-Government Sponsored Entities [Member] |  |
Schedule of Investments [Line Items] |  |
Less than 12 Months, Fair Value | 1,747 | 8,444
Less than 12 Months, Unrealized Losses | (2) | (22)
12 Months or More, Fair Value | 120,061 | 122,950
12 Months or More, Unrealized Losses | (3,490) | (5,176)
Total, Fair Value | 121,808 | 131,394
Total, Unrealized Losses | $ (3,492) | $ (5,198)

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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