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Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Available-for-sale Securities [Abstract] |  |
Amortized cost | $ 491,726 | $ 481,357
Gross Unrealized Gains | 133 | 1,024
Gross Unrealized Losses | (22,862) | (9,106)
Fair Value | 468,997 | 473,275
Held-to-maturity Securities [Abstract] |  |
Held-to-maturity securities, amortized cost | 20,200 | 19,209
Held-to-maturity securities, Gross Unrealized Gains | 24 | 231
Held-to-maturity securities, Gross Unrealized Losses | (714) | (357)
Held-to-maturity, at fair value | 19,510 | 19,083
U.S. Government-sponsored agencies |  |
Available-for-sale Securities [Abstract] |  |
Amortized cost | 115,176 | 133,424
Gross Unrealized Gains | 20 | 531
Gross Unrealized Losses | (2,436) | (765)
Fair Value | 112,760 | 133,190
Municipal securities |  |
Available-for-sale Securities [Abstract] |  |
Amortized cost | 97,160 | 97,370
Gross Unrealized Gains | 39 | 366
Gross Unrealized Losses | (6,119) | (1,359)
Fair Value | 91,080 | 96,377
Held-to-maturity Securities [Abstract] |  |
Held-to-maturity securities, amortized cost | 10,159 | 10,164
Held-to-maturity securities, Gross Unrealized Gains | 0 | 40
Held-to-maturity securities, Gross Unrealized Losses | (640) | (357)
Held-to-maturity, at fair value | 9,519 | 9,847
Mortgage-backed securities |  |
Available-for-sale Securities [Abstract] |  |
Amortized cost | 237,703 | 215,452
Gross Unrealized Gains | 33 | 15
Gross Unrealized Losses | (12,044) | (5,747)
Fair Value | 225,692 | 209,720
Asset-backed securities |  |
Available-for-sale Securities [Abstract] |  |
Amortized cost | 5,003 | 5,000
Gross Unrealized Gains | 0 | 9
Gross Unrealized Losses | (43) | 0
Fair Value | 4,960 | 5,009
Corporate securities |  |
Available-for-sale Securities [Abstract] |  |
Amortized cost | 36,684 | 27,111
Gross Unrealized Gains | 41 | 103
Gross Unrealized Losses | (2,220) | (1,167)
Fair Value | 34,505 | 26,047
Held-to-maturity Securities [Abstract] |  |
Held-to-maturity securities, amortized cost | 10,041 | 9,045
Held-to-maturity securities, Gross Unrealized Gains | 24 | 191
Held-to-maturity securities, Gross Unrealized Losses | (74) | 0
Held-to-maturity, at fair value | $ 9,991 | 9,236
Other securities |  |
Available-for-sale Securities [Abstract] |  |
Amortized cost |  | 3,000
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | (68)
Fair Value |  | $ 2,932

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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