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Securities - Securities with Unrealized Loss Position (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Less than 12 Months |  |
Fair Value | $ 98,395 | $ 106,735
Unrealized Loss | (766) | (771)
12 Months or More |  |
Fair Value | 210,530 | 134,831
Unrealized Loss | (6,561) | (3,428)
Fair Value | 308,925 | 241,566
Unrealized Loss | (7,327) | (4,199)
U.S. Gov’t sponsored entities |  |
Less than 12 Months |  |
Fair Value | 14,786 | 55,696
Unrealized Loss | (41) | (540)
12 Months or More |  |
Fair Value | 70,676 | 34,754
Unrealized Loss | (1,529) | (368)
Fair Value | 85,462 | 90,450
Unrealized Loss | (1,570) | (908)
State & political subdivisions |  |
Less than 12 Months |  |
Fair Value | 13,834 | 15,890
Unrealized Loss | (62) | (69)
12 Months or More |  |
Fair Value | 21,080 | 4,104
Unrealized Loss | (511) | (245)
Fair Value | 34,914 | 19,994
Unrealized Loss | (573) | (314)
Residential & multi-family mortgage |  |
Less than 12 Months |  |
Fair Value | 69,015 | 30,144
Unrealized Loss | (656) | (153)
12 Months or More |  |
Fair Value | 87,286 | 63,699
Unrealized Loss | (2,917) | (1,729)
Fair Value | 156,301 | 93,843
Unrealized Loss | (3,573) | (1,882)
Corporate notes & bonds |  |
Less than 12 Months |  |
Fair Value | 0 | 5,005
Unrealized Loss | 0 | (9)
12 Months or More |  |
Fair Value | 9,759 | 9,042
Unrealized Loss | (601) | (453)
Fair Value | 9,759 | 14,047
Unrealized Loss | (601) | (462)
Pooled SBA |  |
Less than 12 Months |  |
Fair Value | 760 | 0
Unrealized Loss | (7) | 0
12 Months or More |  |
Fair Value | 20,795 | 22,270
Unrealized Loss | (917) | (575)
Fair Value | 21,555 | 22,270
Unrealized Loss | (924) | (575)
Other |  |
Less than 12 Months |  |
Fair Value | 0 | 0
Unrealized Loss | 0 | 0
12 Months or More |  |
Fair Value | 934 | 962
Unrealized Loss | (86) | (58)
Fair Value | 934 | 962
Unrealized Loss | $ (86) | $ (58)

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- Definition Debt Securities, Available-for-sale, Unrealized Loss Position More Than 12 Months [Abstract] + References No definition available. + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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 investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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 investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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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