CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statement of Income and Comprehensive Income [Abstract]
Net income	$ 1,741	$ 832	$ 10,358	$ 2,779
Other comprehensive income, net of tax
Unrealized gain (loss) on investment in securities	41	(38)	67	(23)
Comprehensive income	$ 1,782	$ 794	$ 10,425	$ 2,756