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CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY (Parenthetical) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($)
Issuance of stock to employees under benefit plans, shares withheld for payroll tax | $ 20,025
Cumulative effect of changes in accounting principle, net of tax | (1,670)
Unrealized (losses) gains on marketable securities arising during period, tax | (722)
Reclassification adjustment for gains included in net income, tax | (21)
Amortization of prior service (credit) cost included in net periodic pension and post-retirement expense/income, tax | (71)
Prior service income arising during period, tax | 0
Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings Tax Effect | 769
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] |
Reclassification adjustment for gains included in net income, tax | (902)
Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings Tax Effect | $ (691)

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- Definition Amount of cumulative tax effect on beginning retained earnings from change in accounting principle. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e39076-109324 + Details
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- Definition Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580 + Details
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- Definition Amount of tax (expense) benefit for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580 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 + Details
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