Pension and Other Benefits (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Change in pension liability and postretirement obligations, net of tax		$ (16,312,000)	$ (41,685,000)	$ 23,896,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		286,678,000
Fair value of plan assets at end of year		$ 271,985,000	$ 286,678,000
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Actual		100.00%	100.00%
Liabilities		$ 912,904,000	$ 620,283,000
Liability, Defined Benefit Pension Plan, Noncurrent		86,674,000	114,911,000
Dorner
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Secured Long-term Debt, Noncurrent		750,000,000
Dorner | Bridge Loan
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Secured Long-term Debt, Noncurrent		650,000,000
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		5,077,000
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation		211,307,000	401,870,000
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets		121,110,000	283,280,000
Assets for Plan Benefits, Defined Benefit Plan		5,208,000	427,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment		0	19,038,000	0
Defined Benefit Plan, Benefit Obligation, Benefits Paid		(23,200,000)	(24,492,000)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 459,866,000	404,841,000	459,866,000
Service cost		980,000	1,092,000	1,139,000
Interest cost		10,130,000	11,527,000	14,759,000
Actuarial (gain) loss		(30,482,000)	3,729,000
Benefits paid		(23,200,000)	(24,492,000)
Foreign exchange rate changes		(5,295,000)	6,618,000
Benefit obligation at end of year		356,974,000	404,841,000	459,866,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	313,366,000	286,678,000	313,366,000
Actual gain (loss) on plan assets		3,048,000	49,582,000
Employer contribution		5,442,000	1,316,000
Foreign exchange rate changes		17,000	405,000
Fair value of plan assets at end of year		271,985,000	286,678,000	313,366,000
Funded status		(84,989,000)	(118,163,000)
Unrecognized actuarial loss			(51,540,000)
Net amount recognized		(55,759,000)	(66,623,000)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Accrued liabilities		(3,523,000)	(3,679,000)
Other non-current liabilities		(86,674,000)	(114,911,000)
Net amount recognized		(55,759,000)	(66,623,000)
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax		29,230,000	51,540,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		(470,000)	22,104,000	$ 2,290,000
Federal tax credits (3)		0	(53,499,000)
Defined Benefit Plan, Plan Assets, Payment for Settlement		0	53,499,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	$ 2,722,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Increase (Decrease) for Plan Amendment			19,038,000
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan		$ 2,176,000	$ 3,910,000
Pension Plans | Fixed income securities
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Actual		66.00%	55.00%
Pension Plans | Equity securities
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Actual		34.00%	45.00%
Postretirement Benefit Plans
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Accrued liabilities		$ (183,000)
Other non-current liabilities		(1,013,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		187,000
Liability, Defined Benefit Plan		1,196,000
Defined Benefit Postretirement Life Insurance
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		132,000
Liabilities		4,645,000
MRB Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets		$ 146,592,000
MRB Pension Plan | Fixed income securities
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Actual		81.00%
MRB Pension Plan | Equity securities
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Actual		19.00%
Equity securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		$ 116,468,000
Fair value of plan assets at end of year		80,020,000	$ 116,468,000
Fixed income securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		155,553,000
Fair value of plan assets at end of year		178,155,000	155,553,000
Real Estate Funds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		12,863,000
Fair value of plan assets at end of year		11,849,000	12,863,000
Cash and Cash Equivalents [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		1,794,000
Fair value of plan assets at end of year		1,961,000	1,794,000
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		72,668,000
Fair value of plan assets at end of year		65,673,000	72,668,000
Fair Value, Inputs, Level 1 [Member] | Equity securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		63,758,000
Fair value of plan assets at end of year		46,699,000	63,758,000
Fair Value, Inputs, Level 1 [Member] | Fixed income securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		7,115,000
Fair value of plan assets at end of year		17,013,000	7,115,000
Fair Value, Inputs, Level 1 [Member] | Real Estate Funds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		1,000
Fair value of plan assets at end of year		0	1,000
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		1,794,000
Fair value of plan assets at end of year		1,961,000	1,794,000
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		122,071,000
Fair value of plan assets at end of year		133,670,000	122,071,000
Fair Value, Inputs, Level 2 [Member] | Equity securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0
Fair value of plan assets at end of year		0	0
Fair Value, Inputs, Level 2 [Member] | Fixed income securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		122,071,000
Fair value of plan assets at end of year		133,670,000	122,071,000
Fair Value, Inputs, Level 2 [Member] | Real Estate Funds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0
Fair value of plan assets at end of year		0	0
Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0
Fair value of plan assets at end of year		0	0
(Level 3)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		1,169,000
Fair value of plan assets at end of year		1,160,000	1,169,000
(Level 3) | Equity securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0
Fair value of plan assets at end of year		0	0
(Level 3) | Fixed income securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		1,169,000
Fair value of plan assets at end of year		1,160,000	1,169,000
(Level 3) | Real Estate Funds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0
Fair value of plan assets at end of year		0	0
(Level 3) | Cash and Cash Equivalents [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0
Fair value of plan assets at end of year		0	0
Fair Value Measured at Net Asset Value Per Share [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		90,770,000
Fair value of plan assets at end of year		71,482,000	90,770,000
Fair Value Measured at Net Asset Value Per Share [Member] | Equity securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		52,710,000
Fair value of plan assets at end of year		33,321,000	52,710,000
Fair Value Measured at Net Asset Value Per Share [Member] | Fixed income securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		25,198,000
Fair value of plan assets at end of year		26,312,000	25,198,000
Fair Value Measured at Net Asset Value Per Share [Member] | Real Estate Funds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		12,862,000
Fair value of plan assets at end of year		11,849,000	12,862,000
Fair Value Measured at Net Asset Value Per Share [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year		0
Fair value of plan assets at end of year		$ 0	$ 0