v3.26.1
Long-Term Debt - Credit Agreement (Details) - USD ($)
$ in Millions
Mar. 17, 2026
Sep. 30, 2024
Dec. 31, 2025
Jul. 31, 2023
Secured notes        
Long-Term Debt        
Face amount       $ 113.5
Interest rate (as a percent)       7.25%
Subsequent Events | Secured notes        
Long-Term Debt        
Repayments of long-term debt $ 15.4      
Principal repaid 14.4      
Accrued interest Repaid 1.0      
Principal of loans sold 110.0      
Loan purchase price paid by assignees $ 110.0      
Minimum | Secured notes        
Long-Term Debt        
Interest rate (as a percent)     0.00%  
Maximum | Secured notes        
Long-Term Debt        
Interest rate (as a percent)     12.90%  
Credit Agreement        
Long-Term Debt        
Term of debt   4 years    
Face amount   $ 140.0    
Principal amortization in first year (as a percent)   5.00%    
Principal amortization per quarter in first year (as a percent)   1.25%    
Principal amortization in second year (as a percent)   10.00%    
Principal amortization per quarter in second year (as a percent)   2.50%    
Principal amortization in third and fourth year (as a percent)   15.00%    
Principal amortization per quarter in third and fourth year (as a percent)   3.75%    
Interest rate (as a percent)   7.25%    
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]   slnd:SecuredOvernightFinancingRateSofrThreeMonthTermMember    
Prepayment term subject to additional fees   3 years    
Percentage of prepayment fee in year one   3.00%    
Percentage of prepayment fee in year two   2.00%    
Percentage of prepayment fee in year three   1.00%    
Fees for prepayments in fourth year   $ 0.0    
Threshold liquidity for EBITDA covenant compliance   $ 30.0    
Threshold liquidity for EBITDA covenant compliance, period   30 days    
Minimum liquidity   $ 20.0    
Credit Agreement | Minimum        
Long-Term Debt        
Basis spread (as a percent)   0.15%    
Credit Agreement | Maximum        
Long-Term Debt        
Basis spread (as a percent)   3.00%    
Term Loan        
Long-Term Debt        
Face amount   $ 140.0