AVERAGE SHARE INFORMATION (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
Basic:
Weighted average common shares outstanding (in shares)	8,727,238	8,621,388	8,724,493	8,605,107
Diluted:
Weighted average common shares outstanding (in shares)	8,727,238	8,621,388	8,724,493	8,605,107
Dilutive potential common shares stock options (in shares)	77,346	27,236	63,002	75,275
Weighted average diluted shares outstanding (in shares)	8,804,584	8,648,624	8,787,495	8,680,382
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	935,480	933,626	1,021,127	877,081
Net Income (Loss) Attributable to Parent	$ 15,491,465	$ 19,186,403	$ 32,109,419	$ 42,818,454	$ 87,395,557
Earnings Per Share, Basic	$ 1.78	$ 2.23	$ 3.68	$ 4.98
Earnings Per Share, Diluted	$ 1.76	$ 2.22	$ 3.65	$ 4.93