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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2017
Stockholders' Equity [Abstract] |
Components of accumulated other comprehensive (loss) income | In accordance with GAAP, unrecognized prior service costs and net actuarial gains or losses associated with the Company’s pension and postretirement benefit plans and unrealized gains on derivatives and on AFS securities are included in AOCI, net of tax. For the years ended December 31, components of AOCI are:
(In thousands) |  | 2017 |  |  | 2016 |  |  | 2015 |
Unrecognized prior service cost and net actuarial (losses) on pension plans |  | $ | (15,284 | ) |  | $ | (18,227 | ) |  | $ | (21,557 | )
Unrealized gains on derivatives (cash flow hedges) |  |  | 2,144 |  |  |  | 1,772 |  |  |  | - |
Unrealized net holding (losses) on AFS securities |  |  | (8,937 | ) |  |  | (5,065 | ) |  |  | (861 | )
AOCI |  | $ | (22,077 | ) |  | $ | (21,520 | ) |  | $ | (22,418 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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