Earnings Per Share (Tables)

12 Months Ended

Mar. 31, 2013

Reconciliation From Basic To Diluted Average Common Shares And Net Earnings Per Common Share

The following table sets forth the reconciliation from basic to diluted weighted-average number of common shares outstanding and the calculations of net earnings per common share attributable to EnerSys stockholders.

	March 31,
	2013		2012		2011
Net earnings attributable to EnerSys stockholders	$	166,508	$	144,003	$	113,426
Weighted-average number of common shares outstanding:
Basic		48,022,005		48,748,205		49,376,132
Dilutive effect of:
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired		593,422		467,830		668,114
Convertible Notes		20,022		—		—
Diluted weighted-average number of common shares outstanding		48,635,449		49,216,035		50,044,246
Basic earnings per common share attributable to EnerSys stockholders	$	3.47	$	2.95	$	2.30
Diluted earnings per common share attributable to EnerSys stockholders	$	3.42	$	2.93	$	2.27
Anti-dilutive equity awards not included in diluted weighted-average common shares		—		221,097		—