TREASURY STOCK - Narrative (Detail) (USD $)	6 Months Ended				6 Months Ended	153 Months Ended	0 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jul. 26, 2006	Sep. 17, 2001	Sep. 30, 2014 Open market stock repurchase program	Jun. 30, 2014 Open market stock repurchase program	Sep. 30, 2014 Share Repurchase Program, April 2014	Apr. 22, 2014 Share Repurchase Program, April 2014	Sep. 30, 2014 Share Repurchase Program, April 2014	Sep. 30, 2014 Restricted stock units
Equity, Class of Treasury Stock [Line Items]
Stock authorized to repurchase under stock repurchase program (in shares)			4,000,000	1,000,000
Additional stock authorized to repurchase under stock repurchase program (in shares)			3,000,000
Shares repurchased during the period (in shares)					243,300	4,000,000			256,700	226,526
Shares repurchased during the period, value	$ 30,894,000	$ 16,349,000			$ 9,400,000				$ 11,500,000	$ 10,000,000
Stock repurchase program, authorized amount								100,000,000
Remaining stock authorized to repurchase under stock repurchase program							$ 88,500,000