CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 25,040	$ 102,177	$ 304,059	$ 364,032
Other comprehensive income (loss):
Foreign currency translation adjustments, net of zero tax	(10,603)	(5,897)	(21,575)	(41,654)
Unrealized gain (loss) on derivative instruments and other, net of zero tax	(3,088)	14,962	3,015	(29,182)
Comprehensive income	$ 11,349	$ 111,242	$ 285,499	$ 293,196