Intangible Assets and Goodwill (Tables)

3 Months Ended

Jun. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Components of intangible assets

	June 30, 2017			March 31, 2017
Amortizable intangible asset management contracts and other
Cost	$	374,938		$	408,025
Accumulated amortization	(199,315		)	(194,371		)
Net	175,623			213,654
Indefinite–life intangible assets
U.S. domestic mutual fund management contracts	2,106,351			2,106,351
Clarion Partners fund management contracts	505,200			505,200
EnTrustPermal fund management contracts	596,404			596,404
Other fund management contracts	547,917			542,908
Trade names	68,031			69,863
	3,823,903			3,820,726
Intangible assets, net	$	3,999,526		$	4,034,380

Estimated amortization expense

Remaining fiscal 2018	$	18,196
2019	24,678
2020	24,213
2021	23,797
2022	23,559
Thereafter	61,180
Total	$	175,623

Changes in carrying value of goodwill

	Gross Book Value			Accumulated Impairment			Net Book Value
Balance as of March 31, 2017	3,086,789			(1,161,900		)	1,924,889
Impact of excess tax basis amortization	(5,204		)	—			(5,204		)
Changes in foreign exchange rates and other	4,526			—			4,526
Balance as of June 30, 2017	$	3,086,111		$	(1,161,900	)	$	1,924,211