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Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Net (loss) gain on sale of securities |  | $ 79 | $ (213) | $ 78 | $ (190)
Net impairment losses recognized in earnings |  | (11) |  | (11) |
Income before income taxes |  | (9,277) | (8,642) | (18,290) | (17,437)
Income Tax Expense |  | (3,022) | (2,467) | (5,951) | (5,304)
Net income |  | (6,255) | (6,175) | (12,339) | (12,133)
Reclassified out of AOCI, net of tax |  | (97) | 82 | (141) | 17
Amortization of prior service cost |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [1] | (56) | (65) | (113) | (130)
Amortization of net actuarial benefit cost |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [1] | (9) | (16) | (23) | (33)
Employee Benefit Plan |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  | (65) | (81) | (136) | (163)
Income tax effect |  | (24) | (30) | (51) | (61)
Reclassified out of AOCI, net of tax |  | (41) | (51) | (85) | (102)
Reclassification out of Accumulated Other Comprehensive Income | Available-for-Sale Securities |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Net (loss) gain on sale of securities |  | (79) | 213 | (78) | 190
Net impairment losses recognized in earnings |  | (11) |  | (11) |
Income before income taxes |  | (90) | 213 | (89) | 190
Income Tax Expense |  | (34) | 80 | (33) | 71
Net income |  | $ (56) | $ 133 | $ (56) | $ 119
[1] | Amortization is included in net periodic pension cost. See Note 10, "Employee Benefit Plans."

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- Definition The net gain (loss) realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
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