Income Taxes and Other Taxes	3 Months Ended
Aug. 31, 2012
Income Tax And Non Income Tax Disclosure [Text Block]	14. Income Taxes and Other Taxes Income Taxes In calculating the provision for income taxes on an interim basis, the Company uses an estimate of the annual effective tax rate based upon the facts and circumstances known and applies that rate to its year-to-date earnings or losses. The Company’s effective tax rate is based on expected income and statutory tax rates and takes into consideration permanent differences between financial statement and tax return income applicable to the Company in the various jurisdictions in which the Company operates. The effect of discrete items, such as changes in estimates, changes in enacted tax laws or rates or tax status, and unusual or infrequently occurring events, is recognized in the interim period in which the discrete item occurs. The accounting estimates used to compute the provision for income taxes may change as new events occur, additional information is obtained or as the result of new judicial interpretations or regulatory or tax law changes. The Company’s annual effective tax rate for the fiscal year ending May 31, 2013 is currently expected to be approximately 39.8%. The Corporation, including its domestic subsidiaries, files a consolidated U.S. income tax return, and also files tax returns in various states and other local jurisdictions. Also, certain subsidiaries of the Corporation file income tax returns in foreign jurisdictions. The Company is routinely audited by various tax authorities. The Company is currently under audit by the Internal Revenue Service for fiscal years ended May 31, 2007, 2008 and 2009. The Company is currently under audit by New York State for fiscal years ended May 31, 2006, 2007 and 2008, and by New York City for fiscal years ended May 31, 2005, 2006 and 2007. If any of these tax examinations are concluded within the next twelve months, the Company will make any necessary adjustments to its unrecognized tax benefits. Non-income Taxes The Company is subject to tax examinations for sales-based taxes. A number of these examinations are ongoing and, in certain cases, have resulted in assessments from taxing authorities. Where a liability associated with these examinations and assessments is probable and can be reliably estimated, the Company has made accruals for these matters which are reflected in the Company’s condensed consolidated financial statements.

Income Taxes and Other Taxes

3 Months Ended

Aug. 31, 2012

Income Tax And Non Income Tax Disclosure [Text Block]

14. Income Taxes and Other Taxes

Income Taxes

In calculating the provision for income taxes on an interim basis, the Company uses an estimate of the annual effective tax rate based upon the facts and circumstances known and applies that rate to its year-to-date earnings or losses. The Company’s effective tax rate is based on expected income and statutory tax rates and takes into consideration permanent differences between financial statement and tax return income applicable to the Company in the various jurisdictions in which the Company operates. The effect of discrete items, such as changes in estimates, changes in enacted tax laws or rates or tax status, and unusual or infrequently occurring events, is recognized in the interim period in which the discrete item occurs. The accounting estimates used to compute the provision for income taxes may change as new events occur, additional information is obtained or as the result of new judicial interpretations or regulatory or tax law changes.

The Company’s annual effective tax rate for the fiscal year ending May 31, 2013 is currently expected to be approximately 39.8%.

The Corporation, including its domestic subsidiaries, files a consolidated U.S. income tax return, and also files tax returns in various states and other local jurisdictions. Also, certain subsidiaries of the Corporation file income tax returns in foreign jurisdictions. The Company is routinely audited by various tax authorities. The Company is currently under audit by the Internal Revenue Service for fiscal years ended May 31, 2007, 2008 and 2009. The Company is currently under audit by New York State for fiscal years ended May 31, 2006, 2007 and 2008, and by New York City for fiscal years ended May 31, 2005, 2006 and 2007. If any of these tax examinations are concluded within the next twelve months, the Company will make any necessary adjustments to its unrecognized tax benefits.

Non-income Taxes

The Company is subject to tax examinations for sales-based taxes. A number of these examinations are ongoing and, in certain cases, have resulted in assessments from taxing authorities. Where a liability associated with these examinations and assessments is probable and can be reliably estimated, the Company has made accruals for these matters which are reflected in the Company’s condensed consolidated financial statements.