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Implemented Accounting Pronouncements - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2019
Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Lessee, operating lease, description The Company leases real estate for certain of its branch offices and rental equipment storage yards, vehicles and equipment used in its rental operations. The Company determines if an arrangement is a lease at inception. The Company has leases with lease and non-lease components, which are accounted for separately.  
Lessee, operating lease, option to extend true  
Lessee, operating lease, option to extend, description These leases include one or more options to renew, with renewal terms that may extend the lease term from one to three years.  
Operating lease, right of use assets $ 10,000,000.0  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:PrepaidExpenseAndOtherAssets  
Operating lease liabilities $ 9,945,000 $ 10,000,000.0
Operating Lease, Liability, Statement of Financial Position [Extensible List] us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent  
Operating lease expense $ 3,800,000  
Short term lease expense $ 200,000  
Weighted-average remaining lease term for operating leases 3 years 9 months 18 days  
Weighted-average discount rate for operating leases 4.38%  
Sub-lease income $ 0  
Finance lease liability $ 0  
Lessor, operating lease, description The Company’s equipment rentals for each of its operating segments are governed by agreements that detail the lease terms and conditions.  The determination of whether these contracts with customers contain a lease generally does not require significant judgement.  The Company accounts for these rentals as operating leases.  
Lessor, operating lease, option to extend true  
Lessor, operating lease, option to extend description Initial lease terms vary in length based upon customer needs and generally range from one to sixty months.  
Lease revenue $ 411,000,000.0  
Operating lease revenue 407,600,000  
Finance lease revenue 3,400,000  
Finance lease revenue, sales revenue 3,100,000  
Finance lease revenue, interest income $ 300,000  
Minimum [Member]    
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Lessee, operating lease, renewal term 1 year  
Lessor, operating lease, renewal term 1 month  
Lessor, operating lease, rental products, useful lives 3 years  
Maximum [Member]    
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Lessee, operating lease, renewal term 3 years  
Lessor, operating lease, renewal term 60 months  
Lessor, operating lease, rental products, useful lives 5 years