Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Pension Plans, Net of Tax
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (15,151)	$ (14,834)	$ (14,998)	$ (15,161)
Other comprehensive income (loss) before reclassifications		0		0
Amounts reclassified out of AOCI	147	165	(6)	492
Other comprehensive income (loss)	147	165	(6)	492
Balance at the end of the period	(15,004)	(14,669)	(15,004)	(14,669)
Accumulated tax expense (benefit)			2,200	2,000
Foreign Exchange Contracts
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	1,430	(2,073)	2,907	(367)
Other comprehensive income (loss) before reclassifications	(7,130)	(2,146)	(9,711)	(6,745)
Amounts reclassified out of AOCI	1,800	980	2,904	3,873
Other comprehensive income (loss)	(5,330)	(1,166)	(6,807)	(2,872)
Balance at the end of the period	(3,900)	(3,239)	(3,900)	(3,239)
Ownership Share of Equity Method Investees’ Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	274	(12,302)	(5,299)	(6,739)
Other comprehensive income (loss) before reclassifications	(5)	6,161	5,568	598
Other comprehensive income (loss)	(5)	6,161	5,568	598
Balance at the end of the period	269	(6,141)	269	(6,141)
Post-Retirement Benefit Plan Adjustments
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	1,040	1,029	1,134	1,114
Amounts reclassified out of AOCI	(47)	116	(141)	31
Other comprehensive income (loss)	(47)	116	(141)	31
Balance at the end of the period	993	1,145	993	1,145
Foreign Currency Translation
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(11,758)	(17,347)	(25,556)	(10,272)
Other comprehensive income (loss) before reclassifications	6,503	(10,773)	20,301	(17,848)
Other comprehensive income (loss)	6,503	(10,773)	20,301	(17,848)
Balance at the end of the period	(5,255)	(28,120)	(5,255)	(28,120)
Net Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(24,165)	(45,527)	(41,812)	(31,425)
Other comprehensive income (loss) before reclassifications	(632)	(6,758)	16,158	(23,995)
Amounts reclassified out of AOCI	1,900	1,261	2,757	4,396
Other comprehensive income (loss)	1,268	(5,497)	18,915	(19,599)
Balance at the end of the period	$ (22,897)	$ (51,024)	$ (22,897)	$ (51,024)