Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Net earnings	$ 350,784	$ 340,874	$ 313,374
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	(4,235)	(1,274)	(2,520)
Reclassification of hedging loss included in net earnings (Note 10)	517	517	517
Other comprehensive income (loss), before tax	(3,718)	(757)	(2,003)
Net tax expense of other comprehensive income items	(191)	(191)	(191)
Other comprehensive income (loss), net of tax	(3,909)	(948)	(2,194)
Comprehensive income	$ 346,875	$ 339,926	$ 311,180