v3.22.4
Leases - Operating and Finance Leases (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Jan. 01, 2022
Jan. 02, 2021
Lease, Cost [Abstract]      
Operating lease cost $ 9,543 $ 10,650 $ 10,134
Variable lease cost 243 382 316
Short-term lease cost 42,320 42,764 44,066
Financing lease cost:      
Amortization of right-of-use assets 5,659 9,902 12,598
Interest on lease liabilities 1,081 2,097 3,068
Total lease cost 58,846 65,795 70,182
Operating leases:      
Operating lease right-of-use assets 37,889 30,150  
Current operating lease liabilities 7,296 6,497  
Noncurrent operating lease liabilities 35,737 28,880  
Total operating lease liabilities 43,033 35,377  
Finance leases:      
Property and equipment, gross 32,119 68,982  
Less accumulated depreciation $ (14,992) $ (31,404)  
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Property, plant and equipment, net Property, plant and equipment, net  
Property and equipment, net $ 17,127 $ 37,578  
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Accrued expenses Accrued expenses  
Current finance lease liabilities $ 6,959 $ 17,624  
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other noncurrent liabilities Other noncurrent liabilities  
Long-term finance lease liabilities $ 7,167 $ 14,982  
Total finance lease liabilities $ 14,126 $ 32,606  
Weighted average remaining lease term (years):      
Operating leases 9 years 1 month 6 days 9 years 8 months 12 days  
Finance lease 2 years 9 months 18 days 2 years 3 months 18 days  
Weighted average discount rate:      
Operating leases 4.70% 4.40%  
Finance lease 5.30% 5.20%  
Operating Leases      
2023 $ 9,061    
2024 7,996    
2025 6,199    
2026 4,959    
2027 4,154    
Thereafter 21,006    
Total lease payments 53,375    
Less imputed interest (10,342)    
Finance Leases      
2023 7,443    
2024 2,829    
2025 2,415    
2026 990    
2027 760    
Thereafter 1,083    
Total lease payments 15,520    
Less imputed interest (1,394)    
Summit Materials, LLC      
Lease, Cost [Abstract]      
Operating lease cost 9,543 $ 10,650 10,134
Variable lease cost 243 382 316
Short-term lease cost 42,320 42,764 44,066
Financing lease cost:      
Amortization of right-of-use assets 5,659 9,902 12,598
Interest on lease liabilities 1,081 2,097 3,068
Total lease cost 58,846 65,795 $ 70,182
Operating leases:      
Operating lease right-of-use assets 37,889 30,150  
Current operating lease liabilities 7,296 6,497  
Noncurrent operating lease liabilities 35,737 28,880  
Total operating lease liabilities 43,033 35,377  
Finance leases:      
Property and equipment, gross 32,119 68,982  
Less accumulated depreciation $ (14,992) $ (31,404)  
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Property, plant and equipment, net Property, plant and equipment, net  
Property and equipment, net $ 17,127 $ 37,578  
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Accrued expenses Accrued expenses  
Current finance lease liabilities $ 6,959 $ 17,624  
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other noncurrent liabilities Other noncurrent liabilities  
Long-term finance lease liabilities $ 7,167 $ 14,982  
Total finance lease liabilities $ 14,126 $ 32,606  
Weighted average remaining lease term (years):      
Operating leases 9 years 1 month 6 days 9 years 8 months 12 days  
Finance lease 2 years 9 months 18 days 2 years 3 months 18 days  
Weighted average discount rate:      
Operating leases 4.70% 4.40%  
Finance lease 5.30% 5.20%  
Operating Leases      
2023 $ 9,061    
2024 7,996    
2025 6,199    
2026 4,959    
2027 4,154    
Thereafter 21,006    
Total lease payments 53,375    
Less imputed interest (10,342)    
Finance Leases      
2023 7,443    
2024 2,829    
2025 2,415    
2026 990    
2027 760    
Thereafter 1,083    
Total lease payments 15,520    
Less imputed interest $ (1,394)