Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Foreign Currency Translation
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (17,637)	$ (11,591)	$ 9,715	$ (25,556)
Other comprehensive income (loss) before reclassifications	(3,543)	6,516	(30,895)	20,481
Amounts reclassified out of AOCI	(1,609)	0	(1,609)	0
Other comprehensive income (loss)	(5,152)	6,516	(32,504)	20,481
Balance at the end of the period	(22,789)	(5,075)	(22,789)	(5,075)
Post-Retirement Benefit Plan Adjustments
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	801	1,040	879	1,134
Amounts reclassified out of AOCI	(38)	(47)	(116)	(141)
Other comprehensive income (loss)	(38)	(47)	(116)	(141)
Balance at the end of the period	763	993	763	993
Defined Benefit Pension Plans, Net of Tax
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(14,544)	(15,151)	(14,831)	(14,998)
Other comprehensive income (loss) before reclassifications		0		0
Amounts reclassified out of AOCI	139	147	426	(6)
Other comprehensive income (loss)	139	147	426	(6)
Balance at the end of the period	(14,405)	(15,004)	(14,405)	(15,004)
Accumulated tax expense (benefit)			2,200	2,200
Ownership Share of Equity Method Investees’ Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	268	274	285	(5,299)
Other comprehensive income (loss) before reclassifications	8	(5)	(9)	5,568
Other comprehensive income (loss)	8	(5)	(9)	5,568
Balance at the end of the period	276	269	276	269
Foreign Exchange Contracts
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	1,904	1,430	1,154	2,907
Other comprehensive income (loss) before reclassifications	(2,435)	(7,130)	(2,130)	(9,711)
Amounts reclassified out of AOCI	(170)	1,800	275	2,904
Other comprehensive income (loss)	(2,605)	(5,330)	(1,855)	(6,807)
Balance at the end of the period	(701)	(3,900)	(701)	(3,900)
Accumulated Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, net [Member]
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	0	0	0	0
Other comprehensive income (loss) before reclassifications	(3,407)	0	(3,407)	0
Amounts reclassified out of AOCI	1,572	0	1,572	0
Other comprehensive income (loss)	(1,835)	0	(1,835)	0
Balance at the end of the period	(1,835)	0	(1,835)	0
Net Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(29,208)	(23,998)	(2,798)	(41,812)
Other comprehensive income (loss) before reclassifications	(9,377)	(619)	(36,441)	16,338
Amounts reclassified out of AOCI	(106)	1,900	548	2,757
Other comprehensive income (loss)	(9,483)	1,281	(35,893)	19,095
Balance at the end of the period	$ (38,691)	$ (22,717)	$ (38,691)	$ (22,717)