Share Based Awards (Details 3)	3 Months Ended	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Schedule of Performance Based Awards Under Incentive plan
Expected life (in years)		4 years 9 months 18 days	4 years 10 months 24 days
Expected volatility, minimum		36.40%	43.40%
Expected volatility, maximum		36.60%	43.70%
Risk-free rate		1.70%
Risk-free rate, minimum			1.00%
Risk-free rate, maximum	1.50%
Minimum [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected dividends		4.30%	3.10%
Maximum [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected dividends		4.40%	3.90%
Performance Based Award [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected life (in years)		4 years 9 months 18 days	4 years 10 months 24 days
Expected volatility, minimum		36.40%	41.00%
Expected volatility, maximum		36.50%	43.50%
Risk-free rate	1.40%
Risk-free rate, minimum		1.60%
Risk-free rate, maximum		1.80%
Performance Based Award [Member] | Minimum [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected dividends		4.30%	1.60%
Performance Based Award [Member] | Maximum [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected dividends		5.00%	1.80%