CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Statement (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Net income	$ 106,402	$ 109,036	$ 109,243
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(261)	(788)	1,613
Unrealized cash flow hedge gains (losses) arising during the year	3,379	2,888	(3,573)
Net (gains) losses reclassified into income for revenue hedges	(3,306)	2,353	(2,423)
Net (gains) losses reclassified into income for cost of revenues hedges	(628)	377	(423)
Net unrealized gains (losses) on cash flow hedges	(555)	5,618	(6,419)
Unrealized holding gains during the year	26	64	29
Net losses reclassified into income	0	(10)	(22)
Net unrealized gains on investments	26	54	7
Other comprehensive income (loss)	(790)	4,884	(4,799)
Comprehensive income	$ 105,612	$ 113,920	$ 104,444