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Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Entity
Store
State
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Significant Accounting Policies [Line Items]      
Number of joint ventures | Entity 4    
Allowance for doubtful accounts $ 11,315 $ 7,087  
Capitalized vendor rebates 22,692 13,434  
Goodwill and intangible assets impairment 0 0 $ 0
Accrued sales returns 16,707 12,739  
Selling, general and administrative expense 1,058,316 833,051 800,328
Finance lease ROU assets 11,489 6,232  
Finance lease liabilities 11,762 6,383  
Reduction of inventory due to cash discount recorded $ 17,893 $ 12,029  
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance lease ROU assets Finance lease ROU assets  
Shipping and Handling [Member]      
Significant Accounting Policies [Line Items]      
Selling, general and administrative expense $ 70,453 $ 55,019 54,783
Advertising Expense [Member]      
Significant Accounting Policies [Line Items]      
Selling, general and administrative expense $ 21,552 $ 12,588 $ 16,587
Minimum [Member]      
Significant Accounting Policies [Line Items]      
Operating Lease Remaining Lease Term 1 year    
Maximum [Member]      
Significant Accounting Policies [Line Items]      
Operating Lease Remaining Lease Term 10 years    
Maximum [Member] | Service Revenue Net [Member] | Product Concentration Risk      
Significant Accounting Policies [Line Items]      
Percentage of revenue 1.00% 1.00% 1.00%
Buildings and Improvements | Minimum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 3 years    
Buildings and Improvements | Maximum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 40 years    
Machinery, Vehicles and Equipment | Minimum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 3 years    
Machinery, Vehicles and Equipment | Maximum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 10 years    
Computer Hardware and Software | Minimum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 3 years    
Computer Hardware and Software | Maximum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 10 years    
Furniture and Fixtures | Minimum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 5 years    
Furniture and Fixtures | Maximum [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful lives in years 7 years    
Watsco, Inc.      
Significant Accounting Policies [Line Items]      
Number of locations from which entity operates | Store 671    
Number of states in which entity operates | State 42