CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) (USD $)	9 Months Ended	12 Months Ended
	Dec. 31, 2013	Mar. 31, 2013
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Proceeds from exercise of stock options (in shares)	172,755	332,665
Proceeds from exercise of stock options, tax benefits	$ 1,940,209	$ 3,049,108
Common stock repurchases (in shares)	1,351,699	2,569,597