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Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income taxes	Income Taxes The effective tax rate was 27.4% in the second quarter of 2014 compared to 32.5% for same period of 2013. Effective tax rates differ from statutory federal income tax rates, primarily due to the domestic manufacturing deduction, provisions for state and local income taxes and permanent tax differences. The decrease in the effective tax rate from the second quarter of 2014 compared to the second quarter 2013 is primarily due to incremental research and development tax credits related to amended tax return filings for calendar years 2010 through 2012 in the amount of $5.5 million.

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.

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