Earnings Per Share (Tables)

3 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended June 30,
	2017		2016
Basic weighted-average shares outstanding for EPS	94,869		104,465
Potential common shares:
Dilutive employee stock options	428		212
Diluted weighted-average shares outstanding for EPS	95,297		104,677
Net Income Attributable to Legg Mason, Inc.	$	50,920	$	33,452
Less: Earnings (distributed and undistributed) allocated to participating securities	1,736		1,051
Net Income (Distributed and Undistributed) Allocated to Shareholders (Excluding Participating Securities)	$	49,184	$	32,401
Net Income per share Attributable to Legg Mason, Inc. Shareholders
Basic	$	0.52	$	0.31
Diluted	$	0.52	$	0.31