Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Accumulated other comprehensive income (loss)
Document Period End Date			Dec. 31, 2015
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (35,387,000)	$ 6,935,000	$ (28,796,000)	$ 18,184,000
Other comprehensive income (loss) before reclassifications	(411,000)	(3,128,000)	(8,811,000)	(14,414,000)
Amounts reclassified out of AOCI	2,111,000	50,000	3,920,000	87,000
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1,700,000	(3,078,000)	(4,891,000)	(14,327,000)
Balance at the end of the period	(33,687,000)	3,857,000	(33,687,000)	3,857,000
Foreign Currency Translation
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(10,733,000)	8,576,000	(12,132,000)	23,335,000
Other comprehensive income (loss) before reclassifications	(6,121,000)	(5,743,000)	(4,722,000)	(20,502,000)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(6,121,000)	(5,743,000)	(4,722,000)	(20,502,000)
Balance at the end of the period	(16,854,000)	2,833,000	(16,854,000)	2,833,000
Deferred Income Taxes Related to Other Comprehensive Income			0
Accumulated Defined Benefit Plans Adjustment [Member]
Changes in accumulated other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(6,910,000)		(7,322,000)
Accumulated tax expense (benefit)	(2,200,000)	(2,200,000)	(2,200,000)	(2,200,000)
Accumulated Defined Benefit Pension Plans Adjustment [Member]
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(19,951,000)	(7,245,000)	(20,363,000)	(7,386,000)
Other comprehensive income (loss) before reclassifications	6,663,000		6,663,000
Amounts reclassified out of AOCI	247,000	86,000	659,000	227,000
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	6,910,000	86,000	7,322,000	227,000
Balance at the end of the period	(13,041,000)	(7,159,000)	(13,041,000)	(7,159,000)
Post-Retirement Benefit Plans
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	1,080,000	1,360,000	1,159,000	1,464,000
Amounts reclassified out of AOCI	96,000	(36,000)	17,000	(140,000)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	96,000	(36,000)	17,000	(140,000)
Balance at the end of the period	1,176,000	1,324,000	1,176,000	1,324,000
Ownership Share of Equity Method Investees’ Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(3,069,000)	4,244,000	1,537,000	771,000
Other comprehensive income (loss) before reclassifications	143,000	2,615,000	(4,463,000)	6,088,000
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	143,000	2,615,000	(4,463,000)	6,088,000
Balance at the end of the period	(2,926,000)	6,859,000	(2,926,000)	6,859,000
Forward Contracts [Member]
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(2,714,000)		1,003,000
Other comprehensive income (loss) before reclassifications	(1,096,000)		(6,289,000)
Amounts reclassified out of AOCI	1,768,000		3,244,000
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	672,000	$ 0	(3,045,000)	$ 0
Balance at the end of the period	$ (2,042,000)		$ (2,042,000)