Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Schedule of comprehensive income

				March 31,
	2015			2014			2013
Net income	$	17,453		$	17,972		$	17,165
Net change in unrealized loss on short term investments		(17	)		(35	)		(46	)
Comprehensive income	$	17,436		$	17,937		$	17,119