Income Taxes:

3 Months Ended

Mar. 31, 2012

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

Income Taxes:

Income taxes were accrued at an estimated annual effective tax rate of 34% and 36% in the first quarters of 2012 and 2011, respectively. The effective tax rate differs from that computed at the federal statutory rate of 35% principally because of the effect of foreign and state income taxes, tax credits and deductions for domestic production activities.