Leases, Balance Sheet Information (Details) - USD ($)	Sep. 30, 2023	Mar. 31, 2023
Assets [Abstract]
Operating, Operating lease assets	$ 84,881,000	$ 87,619,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Operating, Operating lease assets	Operating, Operating lease assets
Finance, Plant and equipment	$ 4,604,000	$ 5,549,000
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Plant and equipment - net	Plant and equipment - net
Total leased assets	$ 89,485,000	$ 93,168,000
Current [Abstract]
Operating, Operating lease liabilities	$ 8,737,000	$ 8,767,000
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Operating, Operating lease liabilities	Operating, Operating lease liabilities
Finance, Other current liabilities	$ 1,693,000	$ 1,851,000
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Long-term [Abstract]
Operating, Long-term operating lease liabilities	$ 75,698,000	$ 79,318,000
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Operating, Long-term operating lease liabilities	Operating, Long-term operating lease liabilities
Finance, Other liabilities	$ 1,972,000	$ 2,742,000
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Total lease liabilities	$ 88,100,000	$ 92,678,000