Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements of Comprehensive Income (Loss)
Net income	$ 7,404	$ 5,594	$ 19,307	$ 14,237
Other comprehensive income (loss):
Foreign currency translation adjustments	(2,161)	(5,877)	(3,498)	(11,527)
Pension plan adjustment	(3)	31	(18)	94
Unrealized gain (loss) on available-for-sale securities, net of tax	(8)	(8)	5	(41)
Unrealized gain (loss) on effective cash flow hedges, net of tax	(943)	(4,319)	859	(8,519)
Other comprehensive loss	(3,115)	(10,173)	(2,652)	(19,993)
Comprehensive income (loss)	$ 4,289	$ (4,579)	$ 16,655	$ (5,756)