Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2017	Mar. 31, 2016
Common Stock, Par or Stated Value Per Share		$ 0.10	$ 0.10
Current Assets
Cash and Cash Equivalents		$ 438,000
Receivables:
Fixed assets, net		159,662	$ 163,305
Current Liabilities
REDEEMABLE NONCONTROLLING INTERESTS		677,772	175,785
STOCKHOLDERS' EQUITY
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax		$ (106,784)	$ (66,493)
Common Stock, Shares Authorized		500,000,000	500,000,000
Common Stock, Shares, Issued		95,726,628	107,011,664
Consolidated Entity Excluding Consolidated Investment Vehicles Before Eliminations [Member]
Current Assets
Cash and Cash Equivalents		$ 733,709	$ 1,329,126
Receivables:
Investment securities	[1]	423,619	515,335
Other current assets		74,102	55,405
Current Liabilities
Other current liabilities		117,863	138,301
Consolidated Investment Vehicles [Member]
Current Assets
Cash and Cash Equivalents		651	297
Receivables:
Investment securities		49,901	48,715
Other current assets		0	6,970
Other non-current assets		9,987	84
Current Liabilities
Other current liabilities		736	4,548
Consolidated Legg Mason, Inc.
Current Assets
Restricted cash		16,046	19,580
Receivables:
Investment advisory and related fees		433,192	334,922
Other receivables		70,527	74,694
Total Current Assets		1,801,747	2,385,044
Fixed assets, net		159,662	163,305
Intangible assets, net		4,034,380	3,146,485
Goodwill		1,924,889	1,479,516
Deferred income taxes		202,843	206,797
Other non-current assets		156,907	139,215
TOTAL ASSETS		8,290,415	7,520,446
Current Liabilities
Accrued compensation		486,679	430,736
Accounts Payable and Accrued Liabilities, Current		181,793	201,572
Short-term borrowings		0	40,000
Business Combination, Contingent Consideration, Liability, Current		22,316	26,396
Total Current Liabilities		809,387	841,553
Deferred compensation		87,757	65,897
Deferred income taxes		329,229	260,386
Business Combination, Contingent Consideration, Liability, Noncurrent		14,494	58,189
Other non-current liabilities		138,737	141,886
Long-term Debt		2,221,867	1,740,985
TOTAL LIABILITIES		3,601,471	3,108,896
REDEEMABLE NONCONTROLLING INTERESTS		677,772	175,785
STOCKHOLDERS' EQUITY
Common stock, par value $.10; authorized 500,000,000 shares; issued 107,700,310 shares in December 2015 and 111,469,142 shares in March 2015		9,573	10,701
Additional paid-in capital		2,385,726	2,693,113
Employee stock trust		(24,057)	(26,263)
Deferred compensation employee stock trust		24,057	26,263
Retained earnings		1,694,859	1,576,242
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax		(106,784)	(66,493)
TOTAL STOCKHOLDERS' EQUITY		4,011,172	4,235,765
Stockholders' Equity Attributable to Parent		3,983,374	4,213,563
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		8,290,415	7,520,446
Management Equity Plan [Member] | Royce [Member]
STOCKHOLDERS' EQUITY
Stockholders' Equity Attributable to Noncontrolling Interest	[2]	$ 27,798	$ 22,202

[1] Excludes $28,300 and $13,641 of seed capital as of March 31, 2017, and 2016, respectively, which is related to Legg Mason's investments in CIVs. See Note 17.

[2] Related to Royce management equity plan.