SHARE-BASED COMPENSATION (Details) (USD $)	12 Months Ended							12 Months Ended			12 Months Ended				60 Months Ended		60 Months Ended
	Mar. 31, 2013		Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2013 Minimum [Member]		Mar. 31, 2012 Minimum [Member]	Mar. 31, 2013 Maximum [Member]		Mar. 31, 2012 Maximum [Member]	Mar. 31, 2013 Stock Options [Member]	Mar. 31, 2013 Restricted Stock [Member]	Mar. 31, 2013 Amended LTIP (2003) [Member]	Mar. 31, 2013 2008 Director LTIP [Member]	Mar. 31, 2013 2008 Director LTIP [Member] Restricted Stock [Member]	Mar. 31, 2013 2008 Employee LTIP [Member]	Mar. 31, 2013 2008 Employee LTIP [Member] Restricted Stock [Member]	Mar. 31, 2013 2012 Employee LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)													3,000,000	250,000		1,000,000		750,000
Stock options granted to employees (in shares)	0
Number of shares [Rollforward]
Outstanding, beginning of period (in shares)	145,000
Options exercised (in shares)	(105,000)	[1]
Outstanding, end of period (in shares)	40,000		145,000
Vested, end of period (in shares)	40,000
Exercisable, end of period (in shares)	40,000
Exercise Price Range [Rollforward]
Outstanding, beginning of period (in dollars per share)	$ 13.99		$ 11.91		$ 12.73		$ 7.14	$ 15.25		$ 15.25
Options exercised (in dollars per share)	$ 11.12	[1]			$ 7.14	[1]		$ 15.25	[1]
Outstanding, end of period (in dollars per share)	$ 13.99		$ 11.91		$ 12.73		$ 7.14	$ 15.25		$ 15.25
Weighted Average Exercise Price [Rollforward]
Outstanding, beginning of period (in dollars per share)	$ 13.99		$ 11.91		$ 12.73		$ 7.14	$ 15.25		$ 15.25
Options exercised (in dollars per share)	$ 11.12	[1]			$ 7.14	[1]		$ 15.25	[1]
Outstanding, end of period (in dollars per share)	$ 13.99		$ 11.91		$ 12.73		$ 7.14	$ 15.25		$ 15.25
Vested, end of period (in dollars per share)	$ 13.99
Exercisable, end of period (in dollars per share)	$ 13.99
Weighted Average Contractual Life Remaining and Intrinsic Value [Abstract]
Outstanding, Weighted average contractual life	1 year 6 months
Vested, Weighted average contractual life	1 year 6 months
Exercisable, Weighted average contractual life	1 year 6 months
Outstanding, Aggregate Intrinsic Value	$ 1,288,800
Vested, Aggregate Intrinsic Value	1,288,800
Exercisable, Aggregate Intrinsic Value	1,288,800
Total intrinsic value of stock options exercised											2,900,000
Estimated forfeiture rate (in hundredths)												0.00%
Number of Shares [Rollforward]
Nonvested (in shares)												276,130
Granted (in shares)												105,198			95,851		454,160
Vested (in shares)												(132,244)
Forefeited (in shares)												(3,036)
Nonvested (in shares)												246,048
Weighted Average Grant-date Fair Value [Rollforward]
Nonvested (in dollars per share)												$ 20.75
Granted (in dollars per share)												$ 32.71
Vested (in dollars per share)												$ 19.84
Forefeited (in dollars per share)												$ 23.76
Nonvested (in dollars per share)												$ 26.32
Vested share-based awards withheld to satisfy income tax obligations (in shares)												37,928
Vested share-based awards withheld to satisfy income tax obligations												1,300,000
Compensation Expense [Abstract]
Total share-based compensation expense	3,300,000		2,400,000	1,300,000
Unrecognized compensation expense											0	4,100,000
Unrecognized compensation expense, period for recognition	27 months
401 (k) Profit Sharing Plan [Abstract]
Employer contribution vesting period	4 years
Contribution to profit sharing plan	$ 1,100,000		$ 800,000	$ 400,000

[1] The total intrinsic value of stock options exercised during the year ended March 31, 2013 was $2.9 million.