Income Taxes - Components of Net Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Deferred Tax Assets
Net Operating Loss Carryforwards	$ 20,340	$ 24,111
Inventory Valuation and Reserves	9,322	9,677
Accrued Employee Benefits	13,627	14,758
Other Accrued Liabilities	13,810	13,963
Research and Development Arrangement, Contract to Perform for Others, Costs Incurred, Gross	35,637	25,187
Tax Credit and Other Carryforwards	18,231	22,601
Total	134,159	126,735
Valuation Allowance	5,911	8,281
Total Deferred Tax Assets	128,248	118,454
Deferred Tax Liabilities
Tax Depreciation in Excess of Book	58,723	62,763
Deferred Tax Liabilities, Undistributed Foreign Earnings	6,931	4,831
Deferred Tax Liabilities, Pension Benefits	2,633	1,808
Deferred Tax Liabilities, Other	4,761	4,511
Total Deferred Tax Liabilities	85,086	84,997
Total Net Deferred Tax Liabilities	43,162	33,457
Deferred Tax Assets, Goodwill and Intangible Assets	11,095	5,209
Deferred Tax Asset, Tax Deferred Expense, Operating lease liabilities	12,097	11,229
Deferred Tax Liabilities, Operating lease right-of-use assets	$ 12,038	$ 11,084