Consolidated Statements of Comprehensive Income (Loss) (Consolidated Legg Mason, Inc., USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Consolidated Legg Mason, Inc.
Net Income (Loss)	$ 49,095	$ (12,984)
Other comprehensive income (loss):
Foreign currency translation adjustment	(25,442)	(13,135)
Unrealized gains (losses) on investment securities:
Unrealized holding gains (losses), net of tax provision (benefit) of $(94) and $41, respectively	(140)	62
Reclassification adjustment for (gains) losses included in net income (loss)	6	(9)
Net unrealized gains and losses on investment securities	(134)	53
Total other comprehensive income (loss)	(25,576)	(13,082)
Comprehensive Income (Loss)	23,519	(26,066)
Less: Comprehensive income (loss) attributable to noncontrolling interests	1,280	(3,526)
Comprehensive Income (Loss) Attributable to Legg Mason, Inc.	$ 22,239	$ (22,540)