CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Net income	$ 105,401	$ 10,173	$ 283,786	$ 67,699
Unrealized holding gain (losses), net of tax effect of $0, $83, $497 and $119, respectively	59	(200)	(8,011)	2,418
Reclassification of realized transactions, net of tax effect of $0, $0, $776, and $51, respectively	(113)	(14)	(1,503)	(184)
Change in net foreign currency translation adjustment	0	299	0	1,439
Other comprehensive (loss) income, net of taxes	(54)	85	(9,514)	3,673
Total comprehensive income	$ 105,347	$ 10,258	$ 274,272	$ 71,372