XML 67 R49.htm IDEA: XBRL DOCUMENT v2.4.0.8
Federal, State and Local Income Taxes - Provision for income taxes differs from the amount of income tax determined by applying the applicable U.S. statutory income tax rate (Details 2)
6 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]    
U.S. statutory federal rate 35.00% 35.00%
Increase (decrease) in tax rate from:    
State and local income taxes, net of federal income tax benefit 2.27% 2.23%
Effect of dividends received deductions (0.29%) (0.35%)
Domestic production tax credit (0.65%) (0.40%)
Other, net (1.28%) (0.12%)
Effective income tax rate 35.05% 36.36%