Changes in Other Comprehensive Loss (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Dec. 31, 2015	Dec. 31, 2015
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax		$ (90,906)	$ (92,448)
Other comprehensive income (loss) before reclassification		(4,417)	(4,815)
Amounts reclassified from other comprehensive loss		852	2,792
Net current period other comprehensive income (loss)		(3,565)	(2,023)
Ending balance		(94,471)	(94,471)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax		396	859
Other comprehensive income (loss) before reclassification		145	(469)
Amounts reclassified from other comprehensive loss		2	153
Net current period other comprehensive income (loss)		147	(316)
Ending balance		543	543
Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax		(68,292)	(68,139)
Other comprehensive income (loss) before reclassification		(412)	(1,790)
Amounts reclassified from other comprehensive loss		565	1,790
Net current period other comprehensive income (loss)		153	0
Ending balance		(68,139)	(68,139)
Foreign currency exchange gain/loss
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax		(22,225)	(24,635)
Other comprehensive income (loss) before reclassification		(4,667)	(2,257)
Net current period other comprehensive income (loss)		(4,667)	(2,257)
Ending balance		(26,892)	(26,892)
Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax		(785)	(533)
Other comprehensive income (loss) before reclassification		517	(299)
Amounts reclassified from other comprehensive loss		438	849
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			1,306
Net current period other comprehensive income (loss)		802	550
Ending balance		17	17
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax		285	849
Investment income | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		3	236
Tax expense | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		1	83
Tax expense | Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		(304)	(964)
Tax expense | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		(153)	(457)
Cost of products sold | Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	[1]	869	2,754
Cost of products sold | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		6	(51)
Interest Expense [Member] | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		$ 432	$ 1,357

[1] These AOCL components are included in the computation of net periodic pension cost. (See Note 9 — Net Periodic Benefit Cost for additional details.)