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Consolidated Condensed Statements of Income (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Nov. 30, 2015
Nov. 30, 2014
Nov. 30, 2015
Nov. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Discontinued Operation, Tax Effect of Discontinued Operation $ 146,395 $ 11,739 $ 142,976 $ 14,730
Discontinued Operations        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Discontinued Operation, Tax Effect of Discontinued Operation $ 336 $ (2,206) $ 421 $ (1,966)