CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 2,231	$ 1,741	$ 4,370	$ 10,358
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on investments in securities	10	41	(55)	67
Comprehensive income	$ 2,241	$ 1,782	$ 4,315	$ 10,425