Changes in Other Comprehensive Loss (Narrative) (Details) - USD ($)		3 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax		$ (83,052,000)
Other comprehensive income (loss) before reclassification		(1,513,000)
Amounts reclassified from other comprehensive loss		2,051,000
Net current period other comprehensive income (loss)		538,000
Ending balance net of tax		(82,514,000)
Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax		(55,145,000)
Other comprehensive income (loss) before reclassification		(494,000)
Amounts reclassified from other comprehensive loss		395,000
Net current period other comprehensive income (loss)		(99,000)
Ending balance net of tax		(55,244,000)
Foreign currency exchange gain/loss
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax		(25,355,000)
Other comprehensive income (loss) before reclassification		1,395,000
Amounts reclassified from other comprehensive loss		0
Net current period other comprehensive income (loss)		1,395,000
Ending balance net of tax		(23,960,000)
Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		2,207,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax		1,656,000
Tax expense | Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		(134,000)
Tax expense | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		(551,000)
Cost of products sold | Retirement Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss	[1]	529,000
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		(1,000)
Interest Expense [Member] | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		(329,000)
Foreign currency exchange gain/loss | Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from other comprehensive loss		2,537,000
Change in Derivatives Qualifying as Hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Beginning balance net of tax		(2,552,000)
Other comprehensive income (loss) before reclassification		(2,414,000)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax		1,656,000
Net current period other comprehensive income (loss)		(758,000)
Ending balance net of tax		$ (3,310,000)
Accounting Standards Update 2016-01 [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ (888,000)

[1] 14.    Changes in Accumulated Other Comprehensive Loss
Changes in AOCL by component for the three-month period ended June 30, 2019 are as follows (in thousands):    
Three months ended June 30, 2019  
Retirement Obligations
Foreign Currency
Change in Derivatives Qualifying as Hedges
Total Beginning balance net of tax
$ (55,145 )
$ (25,355 )
$ (2,552 )
$ (83,052 ) Other comprehensive income (loss) before reclassification
(494 )
1,395

(2,414 )
(1,513 ) Amounts reclassified from other comprehensive loss
395

—

1,656

2,051
Net current period other comprehensive income (loss)
(99 )   1,395
  (758 )   538
Ending balance net of tax
$ (55,244 )   $ (23,960 )   $ (3,310 )   $ (82,514 )

Details of amounts reclassified out of AOCL for the three-month period ended June 30, 2019 are as follows (in thousands): Details of AOCL Components
Amount reclassified from AOCL
Affected line item on Condensed Consolidated Statement of Operations Net amortization of prior service cost and pension settlement
 


 
$ 529

(1)  
529

Total before tax  
(134 )
Tax benefit  
$ 395

Net of tax





Change in derivatives qualifying as hedges
 

   
$ (1 )
Cost of products sold     (329 )   Interest expense     2,537
  Foreign currency  
2,207

Total before tax  
(551 )
Tax expense  
$ 1,656

Net of tax

(1) These AOCL components are included in the computation of net periodic pension cost. (See Note 10 — Net Periodic Benefit Cost for additional details.)