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Income Taxes	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income taxes	(7) Income Taxes Income taxes as a percentage of earnings before income taxes as reported in the consolidated financial statements were 7.2% and 11.3% for the three and six months ended June 30, 2018, respectively, compared to 33.9% and 34.1% for the three and six months ended June 30, 2017, respectively. As further described below, the decrease in tax rate for the comparative periods is primarily due to a decrease in the federal corporate tax rate, the release of the valuation allowance related to capital losses as a result of the Company’s tax planning initiatives, a pension contribution made during the second quarter of 2018 that was attributable to the 2017 plan year, and the Company’s additional tax planning initiatives. The federal corporate income tax rate declined from 34% to 21% effective January 1, 2018 as a result of the Tax Cuts and Jobs Act. The Company’s tax rate is lower than the federal statutory rate primarily as a result of tax-exempt income, the release of the valuation allowance related to capital loss carryforwards, and a pension contribution made during the second quarter of 2018 that was attributable to the 2017 plan year. The provisional adjustments recorded in the fourth quarter of 2017 related to the enactment of the Tax Cuts and Jobs Act have not been finalized as of June 30, 2018. The Company expects to finalize those adjustments within the one-year measurement period provided under Staff Accounting Bulletin No. 118 in regards to the application of FASB’s ASC Topic 740, Income Taxes. The impact of the Tax Cuts and Jobs Act is expected to require further adjustments in 2018 due to anticipated additional guidance from the U.S. Department of the Treasury, changes in our assumptions, completion of 2017 U.S. tax returns and further information and interpretations that become available. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income of the appropriate character during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning initiatives in making this assessment. In management’s opinion, the Company will more likely than not realize the benefits of its deferred tax assets and, therefore, has not established a valuation allowance against its deferred tax assets as of June 30, 2018. Management arrived at this conclusion based upon the level of historical taxable income and projections for future taxable income of the appropriate character over the periods in which the deferred tax assets are deductible. As indicated above, the Company released a $46,000 valuation allowance against certain capital loss carryforwards during the second quarter of 2018 as a result of the execution of certain tax planning initiatives that generated sufficient capital gain income prior to the expiration of the carryforwards. The Company follows ASC Topic 740, Income Taxes, which addresses the accounting for uncertain tax positions. For each of the three and six months ended June 30, 2018 and 2017, respectively, the Company did not have any uncertain tax provisions, and did not record any related tax liabilities.

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- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

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