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Long-Term Debt Narrative (Details) - USD ($)
May 31, 2018
Oct. 02, 2021
Jan. 02, 2021
Debt Instrument [Line Items]      
Long-term debt obligations   $ 177,932,000 $ 175,365,000
Deferred debt issuance costs, current   400,000  
Deferred debt issuance costs, noncurrent   $ 200,000  
Maximum ratio of interest coverage to earnings for the last four fiscal quarters   4.0  
Maximum ratio of leverage to earnings for the last four fiscal quarters   3.5  
Revolving credit facility with interest at a variable rate (October 2, 2021 - 1.1%; January 2, 2021 - 1.2%)      
Debt Instrument [Line Items]      
Long-term line of credit outstanding   $ 75,000,000  
Line of credit maximum borrowing capacity   450,000,000  
Line of credit remaining borrowing capacity   375,000,000  
Notes Payable to Banks      
Debt Instrument [Line Items]      
Long-term debt obligations   75,000,000  
Private Placement      
Debt Instrument [Line Items]      
Fair value of debt obligations   116,000,000  
Deferred debt issuance costs, noncurrent   $ 400,000  
Borrowings $ 100,000,000    
Fixed rate notes due in 2025 with an interest rate of 4.22%      
Debt Instrument [Line Items]      
Borrowings $ 50,000,000    
Note term 7 years    
Interest rate 4.22% 4.22%  
Fixed rate notes due in 2028 with an interest rate of 4.40%      
Debt Instrument [Line Items]      
Borrowings $ 50,000,000    
Note term 10 years    
Interest rate 4.40% 4.40%