Consolidated Statements of Comprehensive Income (Loss) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (100,095,000)	$ (7,051,000)	$ (171,102,000)
Other comprehensive income (loss)
Foreign currency translation adjustment	7,222,000	(4,956,000)	1,970,000
Defined Benefit Pension
Actuarial gain (loss), net of taxes of ($133), $1,898, and ($733)	(208,000)	2,969,000	(1,881,000)
Amounts reclassified into results of operations, net of taxes of $48, ($208), and $166	74,521	(326,000)	287,000
Derivative Instruments
Net change in fair value of cash flow hedges, net of taxes of ($897), ($570), and ($321)	(1,404,000)	(892,000)	(580,000)
Amounts reclassified into results of operations, net of taxes of $1,154, $511, and $282	1,804,000	799,000	528,000
Other comprehensive income (loss)	7,489,000	(2,406,000)	324,000
Comprehensive income (loss)	$ (92,606,000)	$ (9,457,000)	$ (170,778,000)