TREASURY STOCK - Narrative (Details) - USD ($)	10 Months Ended	12 Months Ended			23 Months Ended
	Mar. 31, 2016	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2016	May. 19, 2015	Apr. 22, 2014	Jul. 26, 2006
Equity, Class of Treasury Stock [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares)								4,000,000
Shares repurchased during the period, value		$ 311,850,000	$ 51,714,000	$ 34,322,000
Restricted stock units
Equity, Class of Treasury Stock [Line Items]
Shares repurchased during the period (in shares)		256,514	247,568	216,198
Shares repurchased during the period, value		$ 9,100,000	$ 10,800,000	$ 5,500,000
Open market stock repurchase program
Equity, Class of Treasury Stock [Line Items]
Shares repurchased during the period (in shares)			243,300	1,000,407
Shares repurchased during the period, value			$ 9,400,000	$ 28,800,000
Share repurchase program, April 2014
Equity, Class of Treasury Stock [Line Items]
Shares repurchased during the period (in shares)					824,452
Shares repurchased during the period, value					$ 34,300,000
Additional authorized stock repurchase amount							$ 100,000,000
Common stock available to be purchased	0	0			0
Share repurchase program, May 2015
Equity, Class of Treasury Stock [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares)						20,000,000
Shares repurchased during the period (in shares)	10,078,136	67,752	756,700
Shares repurchased during the period, value	$ 300,000,000	$ 2,800,000	$ 31,500,000
Common stock available to be purchased	9,921,864	9,921,864			9,921,864