CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 22,953,905	$ 20,673,991	$ 67,630,875	$ 66,190,438
Foreign currency translation adjustments	320,225	(529,375)	(3,704,498)	(654,864)
Comprehensive income	$ 23,274,130	$ 20,144,616	$ 63,926,377	$ 65,535,574