STOCK-BASED COMPENSATION (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Mar. 31, 2016	Mar. 31, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	935,480	933,626	1,021,127	877,081
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	0.00%	0.00%	56.18%	37.64%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.00%	0.00%	1.37%	1.65%
Stock Option Plans [Abstract]
Number of shares available for grant (in shares)	541,085		541,085
Weighted-average fair value at the grant date			$ 21.64	$ 32.05
Options Activity [Roll Forward]
Exercised (in shares)			(10,180)		(89,403)
Restricted Stock [Abstract]
Grant date fair value (in dollars per share)			$ 43.49		$ 28.11
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Grant date fair value (in dollars per share)			$ 43.49		$ 28.11
Compensation related to stock option and restricted stock plans			$ 1,406,288	$ (6,736,712)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	0 days	0 days	5 years 10 months 24 days	6 years
Group B Performance Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Share-based Compensation, Gross						56,660	443,700
Stock Options Plans [Member]
Stock Option Plans [Abstract]
Shares of authorized common stock reserved for issuance (in shares)	4,100,000		4,100,000
Options Activity [Roll Forward]
Options outstanding, beginning of year (in shares)			950,651
Granted (in shares)			600
Exercised (in shares)			(10,180)
Forfeited (in shares)			(42,087)
Expired (in shares)			(27,697)
Options outstanding, end of period (in shares)	871,287		871,287		950,651
Options exercisable, end of period (in shares)	414,200		414,200
Weighted Average Exercise Price [Roll Forward]
Options outstanding, beginning of year (in dollars per share)			$ 67.20
Granted (in dollars per share)			41.22
Exercised (in dollars per share)			33.90
Forfeited (in dollars per share)			65.12
Expired (in dollars per share)			70.93
Options outstanding, end of period (in dollars per share)	$ 67.56		67.56		$ 67.20
Options exercisable, end of period (in dollars per share)	$ 68.63		$ 68.63
Stock Option Activity Additional Disclosures [Abstract]
Weighted-average remaining contractual term, Options outstanding, end of period			6 years 7 months 17 days
Weighted-average remaining contractual terms, Options exercisable, end of period			5 years 8 months 16 days
Aggregate intrinsic value, Options outstanding, end of period	$ 2,980,055		$ 2,980,055
Aggregate intrinsic value, Options exercisable, end of period	828,611		828,611
Intrinsic value of options exercised	24,916	$ 0	112,393	$ 1,953,575
Compensation Cost Not yet Recognized [Abstract]
Total unrecognized stock-based compensation expense related to non-vested stock options	7,500,000		$ 7,500,000
Weighted average period for recognition			1 year 11 months 23 days
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Weighted average period for recognition			1 year 11 months 23 days
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Compensation related to stock option and restricted stock plans	616,756	230,569	$ 982,420	1,507,530
Group A Performance Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Share-based Compensation, Gross						8,590	70,800
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Share-based Compensation, Gross			2,400		69,950
Restricted Stock [Abstract]
Grant date fair value (in dollars per share)			$ 43.49
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options	$ 1,000,000		$ 1,000,000
Summary of the status and changes in restricted stock [Roll Forward]
Outstanding at Beginning of Year (in shares)			93,550
Awards granted (in shares)			2,400
Vested during the period, net of cancellations (in shares)			0
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited			(32,150)
Outstanding at End of Period (in shares)	63,800		63,800		93,550
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding at March 31, 2012 (in dollars per share)			$ 40.92
Grant date fair value (in dollars per share)			43.49
Vested during the period, net of cancellations (in dollars per share)			0.00
Cancelled during the period (in dollars per share)			65.06
Outstanding at June 30, 2012 (in dollars per share)	$ 28.85		$ 28.85		$ 40.92
Compensation related to stock option and restricted stock plans	$ 236,006	(2,986,173)	$ 423,868	(6,395,993)
Restricted Stock [Member] | EPS Target [Member] | $10.29 EPS [Member]
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Vesting Percentage (in hundredths)			100.00%
EPS Target			$ 10.29
Restricted Stock [Member] | EPS Target [Member] | $9.76 EPS [Member]
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Vesting Percentage (in hundredths)			67.00%
EPS Target			$ 9.76
Restricted Stock [Member] | EPS Target [Member] | $9.26 EPS [Member]
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Vesting Percentage (in hundredths)			33.00%
EPS Target			$ 9.26
Restricted Stock [Member] | EPS Target [Member] | Below $9.26 EPS [Member]
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Vesting Percentage (in hundredths)			0.00%
EPS Target
Restricted Stock [Member] | Trailing Four Quarter EPS Target [Member] | $13.00 [Member]
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Vesting Percentage (in hundredths)			25.00%
EPS Target			$ 13.00
Restricted Stock [Member] | Trailing Four Quarter EPS Target [Member] | $14.50 [Member]
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Vesting Percentage (in hundredths)			25.00%
EPS Target			$ 14.50
Restricted Stock [Member] | Trailing Four Quarter EPS Target [Member] | $16.00 [Member]
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Vesting Percentage (in hundredths)			25.00%
EPS Target			$ 16.00
Restricted Stock [Member] | Trailing Four Quarter EPS Target [Member] | $18.00 [Member]
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Vesting Percentage (in hundredths)			25.00%
EPS Target			$ 18.00
Equity Securities [Member]
Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Compensation related to stock option and restricted stock plans	$ 852,762	$ (2,755,604)	$ 1,406,288	$ (4,888,463)
Performance Shares [Member]
Compensation Cost Not yet Recognized [Abstract]
Weighted average period for recognition			2 years 1 month 6 days
Schedule of vesting of restricted shares on basis of compounded annual EPS growth [Abstract]
Weighted average period for recognition			2 years 1 month 6 days
Maximum [Member] | Stock Options Plans [Member]
Stock Option Plans [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			10 years
Vesting period			5 years
Minimum [Member] | Stock Options Plans [Member]
Stock Option Plans [Abstract]
Vesting period			3 years