XML 47 R35.htm IDEA: XBRL DOCUMENT v3.23.3
Investments and Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2023
Oct. 01, 2022
Sep. 30, 2023
Oct. 01, 2022
Apr. 01, 2023
Investments and Fair Value of Financial Instruments          
Document Period End Date     Sep. 30, 2023    
Equity Method Investments $ 18,500   $ 18,500   $ 20,400
Proceeds from Limited Partnership Investments 2,300 $ 0 2,800 $ 2,000  
Gain (Loss) on Investments 1,200 $ 1,200 900 $ 400  
Fair Value, Recurring [Member] | United Silicon Carbide          
Investments and Fair Value of Financial Instruments          
Business Combination, Contingent Consideration, Liability, Noncurrent         (31,250)
Fair Value, Recurring [Member] | Equity Securities          
Investments and Fair Value of Financial Instruments          
Marketable Securities 642   642   1,094
Fair Value, Recurring [Member] | Mutual Fund          
Investments and Fair Value of Financial Instruments          
Deferred Compensation Plan Assets 42,939   42,939   40,653
Quoted Prices In Active Markets For Identical Assets (Level 1) | Fair Value, Recurring [Member] | United Silicon Carbide          
Investments and Fair Value of Financial Instruments          
Business Combination, Contingent Consideration, Liability, Noncurrent         0
Quoted Prices In Active Markets For Identical Assets (Level 1) | Fair Value, Recurring [Member] | Equity Securities          
Investments and Fair Value of Financial Instruments          
Marketable Securities 642   642   1,094
Quoted Prices In Active Markets For Identical Assets (Level 1) | Fair Value, Recurring [Member] | Mutual Fund          
Investments and Fair Value of Financial Instruments          
Deferred Compensation Plan Assets 42,939   42,939   40,653
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring [Member] | United Silicon Carbide          
Investments and Fair Value of Financial Instruments          
Business Combination, Contingent Consideration, Liability, Noncurrent         0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring [Member] | Equity Securities          
Investments and Fair Value of Financial Instruments          
Marketable Securities 0   0   0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring [Member] | Mutual Fund          
Investments and Fair Value of Financial Instruments          
Deferred Compensation Plan Assets 0   0   0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | United Silicon Carbide          
Investments and Fair Value of Financial Instruments          
Business Combination, Contingent Consideration, Liability, Noncurrent         (31,250)
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Equity Securities          
Investments and Fair Value of Financial Instruments          
Marketable Securities 0   0   0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Mutual Fund          
Investments and Fair Value of Financial Instruments          
Deferred Compensation Plan Assets $ 0   $ 0   $ 0