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Income Taxes:	6 Months Ended
	Jun. 30, 2018
Income Taxes:
Income Taxes:	11. Income Taxes: For the three months ended June 30, 2018 and July 1, 2017, the effective income tax rate was 24.1% and 33.9%, respectively. For the six months ended June 30, 2018 and July 1, 2017, the effective income tax rate was 24.7% and 35.5%, respectively. The lower effective income tax rates in the 2018 periods when compared to the 2017 periods are primarily due to the enactment of the Tax Cuts and Jobs Act that reduced the federal corporate income tax rate from 35% to 21% beginning in 2018.

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

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