Acquisitions (Narratives) (Details) - USD ($)					3 Months Ended	4 Months Ended	12 Months Ended
	Apr. 26, 2023	Dec. 01, 2021	May 04, 2021	Apr. 07, 2021	Jun. 30, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2022	Mar. 31, 2021
Business Acquisition [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment							$ (232,000)	$ (375,000)		$ (2,638,000)
Revenue from Contract with Customer, Excluding Assessed Tax							936,240,000	906,555,000		649,642,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest							74,475,000	38,446,000		10,076,000
Net sales:							$ 936,240,000	906,555,000		649,642,000
Estimated useful life		10 years		15 years			17 years
Line of Credit Facility, Maximum Borrowing Capacity							$ 100,000,000
Long-term Debt						$ 497,135,000	$ 458,052,000	$ 497,135,000	$ 497,135,000
Common Stock, Shares, Issued						28,517,333	28,611,721	28,517,333	28,517,333
Voting common stock: 50,000,000 shares authorized; 28,611,721 and 28,517,333 shares issued and outstanding						$ 285,000	$ 286,000	$ 285,000	$ 285,000
Extinguishment of Debt, Amount							0	14,803,000		0
Gross balance of deferred costs							$ 6,323,000
Stock Issued During Period, Shares, New Issues			4,312,500				4,312,500
Proceeds from Issuance of Common Stock							$ 207,000,000
Operating Income (Loss)							97,841,000	73,781,000		42,255,000
Cost of Goods and Services Sold							594,141,000	590,825,000		429,417,000
Deferred Compensation Arrangement with Individual, Compensation Expense							$ 0	0	970,000	0
Deferred Compensation Arrangement with Individual, Requisite Service Period							45 days
Bridge Loan							$ 650,000,000
Goodwill						648,849,000	644,629,000	648,849,000	648,849,000	331,176,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net				$ 481,012,000			67,347,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		$ 907,000		8,058,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets		1,709,000		20,218,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		3,072,000		26,104,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		21,350,000		190,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		1,382,000		658,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other		(1,905,000)		(896,000)
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation				(14,582,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities				(35,689,000)
Debt Instrument, Increase (Decrease), Other, Net							75,000,000
Proceeds from Sales of Assets, Investing Activities							373,000	461,000		5,453,000
Acquisition Costs, Period Cost								8,908,000
Carrying amount of the Company's revolving credit facility						502,560,000	462,560,000	502,560,000	502,560,000
Dorner
Business Acquisition [Line Items]
Goodwill				287,141,000		287,141,000	287,141,000	287,141,000	287,141,000
Garvey
Business Acquisition [Line Items]
Goodwill							41,216,000
Cost of Goods and Service, Product and Service Benchmark
Business Acquisition [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense									521,000
Selling and Marketing Expense [Member]
Business Acquisition [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense									350,000
General and Administrative Expense
Business Acquisition [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense									74,000
Business Combination, Acquisition Related Costs						376,000
Research and Development Expense
Business Acquisition [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense									25,000
Line of Credit
Business Acquisition [Line Items]
Extinguishment of Debt, Amount								326,000
Gross balance of deferred costs							4,027,000
Bridge Loan
Business Acquisition [Line Items]
Extinguishment of Debt, Amount								8,531,000
First Lien Facilities
Business Acquisition [Line Items]
Carrying amount of the Company's revolving credit facility							750,000,000
United States
Business Acquisition [Line Items]
Net sales:							$ 595,363,000	$ 548,620,000		$ 348,986,000
Engineered drawings
Business Acquisition [Line Items]
Estimated useful life							5 years
Finite-lived Intangible Assets Acquired						330,000
Customer relationships
Business Acquisition [Line Items]
Estimated useful life							17 years
Customer Receipts
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired						8,200,000			137,000,000
Acquired technology
Business Acquisition [Line Items]
Estimated useful life							16 years
Finite-lived Intangible Assets Acquired									45,000,000
Trade Names
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired									8,000,000
Technology Service
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired						4,670,000
Trademark
Business Acquisition [Line Items]
Estimated useful life							14 years
Finite-lived Intangible Assets Acquired						3,610,000
Patents
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired						2,440,000
Order or Production Backlog
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired						$ 2,100,000
STAHL [Member] | Line of Credit
Business Acquisition [Line Items]
Secured Long-term Debt, Noncurrent							$ (445,000,000)
STAHL [Member] | New Revolving Credit Facility
Business Acquisition [Line Items]
Secured Long-term Debt, Noncurrent							(100,000,000)
Dorner
Business Acquisition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax									132,014,000
Payments to Acquire Businesses, Net of Cash Acquired				481,012,000
Operating Income (Loss)									12,451,000
Severance Costs									218,000
Cost of Goods and Services Sold									$ 2,981,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount				$ 8,000,000
Acquisition Costs, Period Cost							0
Dorner | Forecast
Business Acquisition [Line Items]
Stock Issued During Period, Value, New Issues					$ 198,705,000
Garvey
Business Acquisition [Line Items]
Goodwill		40,832,000
Payments to Acquire Business Two, Net of Cash Acquired		67,347,000
Cash Acquired from Acquisition		$ 907,000
Business Combination, Contingent Consideration, Liability							2,000,000
Payments for (Proceeds from) Previous Acquisition							1,616,000
Acquisition Costs, Period Cost							0
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability							1,230,000
Business Combination, Contingent Consideration, Liability, Noncurrent							2,000,000
montratec
Business Acquisition [Line Items]
Secured Long-term Debt, Noncurrent							(50,000,000)
montratec | Forecast
Business Acquisition [Line Items]
Business Combination, Price of Acquisition, Expected	$ 110,000,000
Asset Acquisition, Price of Acquisition, Expected	14,000,000
Line of Credit Facility, Increase (Decrease), Net	$ 75,000,000
montratec | General and Administrative Expense
Business Acquisition [Line Items]
Business Acquisition, Transaction Costs							0
Goodwill [Member] | Garvey
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset							$ 384,000