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Securities - Available for Sale (Detail) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 531,307 | $ 409,110
Unrealized Gain | 1,994 | 4,798
Unrealized Loss | (10,967) | (4,199)
Securities available for sale | 522,334 | 409,709
U.S. gov’t sponsored entities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 148,034 | 108,578
Unrealized Gain | 178 | 478
Unrealized Loss | (2,703) | (908)
Securities available for sale | 145,509 | 108,148
State & political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 137,848 | 134,428
Unrealized Gain | 1,643 | 3,609
Unrealized Loss | (1,096) | (314)
Securities available for sale | 138,395 | 137,723
Residential & multi-family mortgage |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 199,968 | 111,214
Unrealized Gain | 76 | 304
Unrealized Loss | (5,409) | (1,882)
Securities available for sale | 194,635 | 109,636
Corporate notes & bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 12,358 | 17,610
Unrealized Gain | 31 | 52
Unrealized Loss | (353) | (462)
Securities available for sale | 12,036 | 17,200
Pooled SBA |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 32,079 | 36,260
Unrealized Gain | 66 | 355
Unrealized Loss | (1,312) | (575)
Securities available for sale | 30,833 | 36,040
Other |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,020 | 1,020
Unrealized Gain | 0 | 0
Unrealized Loss | (94) | (58)
Securities available for sale | $ 926 | $ 962

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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