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Accumulated Other Comprehensive Loss (Details 1) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | [2] | Sep. 30, 2017 | [2]
Realized (gains) losses on sale of securities |  |  |  |  |  |  |
Net realized (gains) losses on investment securities |  | $ 0 | [1] | $ (56) | [1] | $ 148 | $ (115)
Provision for income tax expense |  | 0 | [1] | 19 | [1] | (31) | 39
Net of tax |  | 0 | [1] | (37) | [1] | 117 | (76)
Amortization of estimated defined benefit pension plan loss |  |  |  |  |  |  |
Other expense |  | 490 | [1] | 0 | [1] | 1,470 | (318)
Provision for income taxes |  | (103) | [3] | 0 | [3] | (309) | 108
Net of tax |  | 387 | [3] | 0 | [3] | 1,161 | (210)
Total reclassifications for the period | [4] | $ 387 | [1] | $ (37) | [1] | $ 1,278 | $ (286)
[1] | Amounts in parentheses indicate credits.
[2] | Amounts in parentheses indicate income and other amounts indicate expenses.
[3] | Amounts in parentheses indicate credits.
[4] | Amounts in parentheses indicate debits on the Consolidated Balance Sheets.

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- Definition Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569643-111683 + Details
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