Revenue Recognition (Details) - USD ($)		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Contract with Customer, Asset, Net, Current		$ 8,559,000	$ 2,361,000
Revenue from Contract with Customer, Excluding Assessed Tax		649,642,000	809,162,000	$ 876,282,000
Contract with Customer, Liability, Current		15,373,000	10,796,000	11,501,000
Proceeds from Customers for Progress Payments		35,815,000	36,058,000
Contract with Customer, Liability, Revenue Recognized		(10,796,000)	(11,501,000)
Increase (Decrease) in Deferred Revenue and Customer Advances and Deposits		735,000	(225,000)
Accounts Receivable, Allowance for Credit Loss, Current		5,686,000	5,056,000
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense		2,495,000	1,931,000	13,974,000
Deductions		(1,973,000)	(1,254,000)	(902,000)
Charged to Other Accounts		175,000	(730,000)	960,000
Revenue, Remaining Performance Obligation, Amount		$ 4,643,000
Revenue, Remaining Performance Obligation, Percentage		84.00%
Allowance for doubtful accounts
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense		$ 2,411,000	3,115,000	784,000
Deductions	[1]	(1,973,000)	(1,254,000)	(902,000)
Charged to Other Accounts		$ 192,000	(69,000)	$ 112,000
Long-term Contract with Customer [Member]
Revenue, Performance Obligation, Description of Warranty		24 to 36
Short-term Contract with Customer [Member]
Revenue, Performance Obligation, Description of Warranty		12
Other Income [Member]
Contract with Customer, Liability, Revenue Recognized		$ (21,177,000)	(25,037,000)
Engineered Products [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		79,989,000	83,977,000
All other [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		104,000	56,000
Crane Solutions [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		298,135,000	371,974,000
Industrial Products [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 271,414,000	$ 353,155,000

[1] SCHEDULE II—Valuation and qualifying accounts March 31, 2021, 2020, and 2019 Dollars in thousands   Additions          Description Balance at
Beginning
of Period Charged to Costs and Expenses Charged
to Other
AccountsAcquisition/DivestitureDeductions Balance
at End of
PeriodYear ended March 31, 2021:       Deducted from asset accounts:       Allowance for doubtful accounts$5,056 $2,411 $192 $— $1,973 (1)$5,686 Deferred tax asset valuation allowance15,036 84 (17)— —  15,103 Total$20,092 $2,495 $175 $— $1,973  $20,789 Reserves on balance sheet:      Accrued general and product liability costs, net of insurance recoveries$11,944 $4,634 $— $— $3,403 (2)$13,175 Year ended March 31, 2020:       Deducted from asset accounts:       Allowance for doubtful accounts$3,264 $3,115 $(69)$— $1,254 (1)$5,056 Deferred tax asset valuation allowance16,881 (1,184)(661)— —  15,036 Total$20,145 $1,931 $(730)$— $1,254  $20,092 Reserves on balance sheet:      Accrued general and product liability costs, net of insurance recoveries$12,686 $3,033 $— $— $3,775 (2)$11,944 Year ended March 31, 2019:       Deducted from asset accounts:       Allowance for doubtful accounts$3,520 $784 $(112)$(26)$902 (1)$3,264 Deferred tax asset valuation allowance4,671 13,190 (848)(132)—  16,881 Total$8,191 $13,974 $(960)$(158)$902  $20,145 Reserves on balance sheet:      Accrued general and product liability costs, net of insurance recoveries$13,582 $2,887 $— $— $3,783 (2)$12,686    _________________ (1)Uncollectible accounts written off, net of recoveries (2)Insurance claims and expenses paid