XML 41 R30.htm IDEA: XBRL DOCUMENT v3.26.1
Long-Term Debt (Narrative) (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Dec. 31, 2019
Sep. 30, 2017
Mar. 28, 2026
Mar. 29, 2025
Mar. 28, 2026
Mar. 29, 2025
Jun. 26, 2021
Dec. 31, 2010
Debt Instrument [Line Items]                
Property and equipment with undepreciated cost pledge as collateral for long term debt     $ 237,100,000   $ 237,100,000      
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]         us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember      
Line of Credit [Member]                
Debt Instrument [Line Items]                
Line of credit facility borrowing capacity     150,000,000.0   $ 150,000,000.0      
Debt maturity date         Jun. 01, 2030      
Letter of Credit [Member]                
Debt Instrument [Line Items]                
Line of credit facility borrowing capacity     10,000,000.0   $ 10,000,000.0      
Borrowings outstanding     900,000   900,000      
Cash Flow Hedging [Member]                
Debt Instrument [Line Items]                
Other comprehensive income (loss), net of income taxes     300,000 $ (1,800,000) (200,000) $ 500,000    
Unrealized gains included in other assets     $ 7,200,000 $ 9,600,000 $ 7,200,000 $ 9,600,000    
Senior Notes, Maturing 2031 [Member]                
Debt Instrument [Line Items]                
Debt instrument principal amount             $ 350,000,000.0  
Debt instrument stated interest rate     4.00%   4.00%      
Maturity period of senior notes         2031      
Secured Debt Maturing October 2027 [Member]                
Debt Instrument [Line Items]                
Debt maturity date   Oct. 01, 2027            
Secured borrowing   $ 60,000,000            
Secured Debt Maturing October 2027 [Member] | Interest Rate Swap [Member]                
Debt Instrument [Line Items]                
Derivative notional amount     $ 9,500,000   $ 9,500,000      
Derivative, fixed interest rate     3.962%   3.962%      
Monthly principal amortization         $ 500,000      
Derivative maturity date         Oct. 01, 2027      
Debt instrument variable interest rate         1.75%      
Secured Debt Maturing January 2030 [Member]                
Debt Instrument [Line Items]                
Debt instrument principal amount $ 155,000,000              
Debt maturity date Jan. 01, 2030              
Secured Debt Maturing January 2030 [Member] | Interest Rate Swap [Member]                
Debt Instrument [Line Items]                
Derivative notional amount $ 105,300,000              
Derivative, fixed interest rate 2.998%   2.998%   2.998%      
Monthly principal amortization $ 650,000              
Debt instrument variable interest rate 1.60%              
Recovery Zone Facility Bonds [Member]                
Debt Instrument [Line Items]                
Debt maturity date         Jan. 01, 2036      
Annual amount of redemption of bonds     $ 4,500,000   $ 4,500,000      
Mandatory bonds redemption beginning period         Jan. 01, 2014      
Mandatory bonds redemption period end date         Dec. 17, 2029      
Total amount of bonds funded     $ 40,900,000   $ 40,900,000     $ 99,700,000