Reclassifications out of AOCI (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2014		Dec. 31, 2013	Sep. 30, 2014		Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (32,191)			$ (32,191)			$ (12,594)		$ 4,481
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	(569)		157	(510)		252
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(18,806)		945	(35,497)		8,244
Other Comprehensive Income (Loss), Net of Tax	(19,157)			(35,360)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(440)			(1,312)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(19,597)		962	(36,672)		8,077
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	51	[1]		51	[1]		620	[1]	561	[1]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	(598)	[1]		(605)	[1]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	29	[1]		95	[1]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(569)	[1]		(510)	[1]
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(3,093)	[2]		(3,093)	[2]		(2,871)	[2]	(2,428)	[2]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	247	[2]		742	[2]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(469)	[2]		(1,407)	[2]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(222)	[2]		(665)	[2]
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(29,149)			(29,149)			(10,343)		6,348
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(18,806)			(35,497)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0			0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (18,806)			$ (35,497)

[1] (1) Realized gain (loss) on available for sale securities is reported in the interest income and miscellaneous expense line of the Consolidated Statements of Income.

[2] (2) Amortization (gain) of defined benefit pension items is reported in the selling, general and administrative expense line of the Consolidated Statements of Income.