Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Net income	$ 6,733	$ 7,020
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	331	(130)
Change in derivatives qualifying as hedges, net of taxes of $(71) and $(25)	116	86
Change in pension liability and postretirement obligation	1	(5)
Adjustments for unrealized gain on investments:
Unrealized holding gain (losses) arising during the period, net of tax	277	(434)
Reclassification adjustment for gain included in net income, net of taxes of $9 and $127	(16)	(235)
Net change in unrealized gain on investments	261	(669)
Total other comprehensive income (loss)	709	(718)
Comprehensive income	$ 7,442	$ 6,302