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Effective Income Tax Rate Reconciliation (Table Text Block) | 12 Months Ended
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Mar. 31, 2015
Table Text Block [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation |
|  | Years Ended March 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In percentages)
Statutory federal income tax rate |  | 35.00% |  | 35.00% |  | 35.00%
Increase (reduction) in rate resulting from: |  |  |  |  |  |
State taxes, net of federal benefit |  | 2.21% |  | 2.38% |  | 2.08%
Foreign rate differential |  | (0.32)% |  | (0.33)% |  | (0.45)%
Federal tax credits |  | (0.29)% |  | (0.32)% |  | (0.51)%
Dividend received deduction |  | (0.03)% |  | (0.03)% |  | (0.03)%
Other |  | (0.11)% |  | (0.40)% |  | (0.89)%
Actual tax expense of operations |  | 36.46% |  | 36.30% |  | 35.20%

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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