Share Based Awards (Details 3)	3 Months Ended
	Jun. 30, 2012 Y	Jun. 30, 2011 Y
Schedule of Performance Based Awards Under Incentive plan
Expected life (in years)	5.0	4.3
Performance Based Award [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected life (in years)	5.0	4.3
Expected volatility	41.70%	41.20%
Expected dividends	2.50%	1.80%
Risk-free rate	0.70%	1.80%