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Debt Securities Available For Sale (Available-for-Sale Securities, Continuous Unrealized Loss Position, Fair Value ) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Schedule of Available-for-sale Securities [Line Items] |  |
Debt Securities, Less than 12 Months - Fair Value | $ 77,884 | $ 97,411
Debt Securities, More than 12 Months - Fair Value | 41,934 | 12,309
Debt and Equity Securities - Total Fair Value | 119,818 | 109,720
Debt and Equity Securities, Less than 12 Months - Unrealized Losses | 2,233 | 1,955
Debt and Equity Securities, More than 12 Months - Unrealized Losses | 3,433 | 357
Debt and Equity Securities - Total Unrealized Losses | 5,666 | 2,312
Mortgage-backed securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Debt Securities, Less than 12 Months - Fair Value | 74,704 | 94,909
Debt Securities, More than 12 Months - Fair Value | 41,934 | 12,309
Debt and Equity Securities - Total Fair Value | 116,638 | 107,218
Debt and Equity Securities, Less than 12 Months - Unrealized Losses | 2,228 | 1,951
Debt and Equity Securities, More than 12 Months - Unrealized Losses | 3,433 | 357
Debt and Equity Securities - Total Unrealized Losses | 5,661 | 2,308
Municipal Obligations [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Debt Securities, Less than 12 Months - Fair Value | 3,180 | 2,502
Debt and Equity Securities - Total Fair Value | 3,180 | 2,502
Debt and Equity Securities, Less than 12 Months - Unrealized Losses | 5 | 4
Debt and Equity Securities - Total Unrealized Losses | $ 5 | $ 4

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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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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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- 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://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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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 less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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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