LITIGATION (Details) £ in Millions, $ in Millions	1 Months Ended			3 Months Ended
	Jan. 31, 2015 plaintiff	Jan. 31, 2013 fund lawsuit	Jul. 31, 2011 fund	Mar. 31, 2012 USD ($)	Mar. 31, 2012 GBP (£)
Litigation [Line Items]
Portfolio amount of securities | £					£ 500
Realized losses in portfolio | $				$ 125
Minimum
Litigation [Line Items]
Value of alleged damages | $				177
Maximum
Litigation [Line Items]
Value of alleged damages | $				$ 234
Sivolella Litigation
Litigation [Line Items]
Number of funds involved in lawsuit | fund			8
Sanford Litigation
Litigation [Line Items]
Number of funds involved in lawsuit | fund		8
Number of plaintiffs | plaintiff	2
Sivolella and Sanford Litigations
Litigation [Line Items]
Number of funds involved in lawsuit | fund		4
Number of lawsuits | lawsuit		2