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Income Taxes:	3 Months Ended
	Mar. 31, 2018
Income Taxes:
Income Taxes:	11. Income Taxes: For the three months ended March 31, 2018 and April 1, 2017, the effective income tax rate was 25.4% and 37.0%, respectively. The lower effective income tax rate was 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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