Effective Income Tax Rate Reconciliation (Table Text Block)

12 Months Ended

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%