Significant Accounting Policies - Summary of Revenues by Type and by Applicable Accounting Standard (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Revenues	$ 289,260	$ 352,997	$ 322,141	$ 853,518	$ 1,000,232	$ 892,987
Topic 842 [Member]
Revenues:
Revenues	156,520	192,850		468,642	541,467
Topic 606 [Member]
Revenues:
Revenues	132,740	160,147		384,876	458,765
Rental Revenues [Member] | Owned Equipment Rentals [Member]
Revenues:
Revenues	142,876	177,592		432,511	498,533
Rental Revenues [Member] | Owned Equipment Rentals [Member] | Topic 842 [Member]
Revenues:
Revenues	142,708	177,287		431,881	497,709
Rental Revenues [Member] | Owned Equipment Rentals [Member] | Topic 606 [Member]
Revenues:
Revenues	168	305		630	824
Rental Revenues [Member] | Re Rent Revenues [Member]
Revenues:
Revenues	6,546	7,205		16,306	19,761
Rental Revenues [Member] | Re Rent Revenues [Member] | Topic 842 [Member]
Revenues:
Revenues	6,546	7,205		16,306	19,761
Ancillary And Other Rental Revenues [Member]
Revenues:
Revenues	16,427	19,335		47,345	54,269
Ancillary And Other Rental Revenues [Member] | Topic 842 [Member]
Revenues:
Revenues	7,266	8,358		20,455	23,997
Ancillary And Other Rental Revenues [Member] | Topic 606 [Member]
Revenues:
Revenues	9,161	10,977		26,890	30,272
Ancillary And Other Rental Revenues [Member] | Delivery and Pick-up [Member]
Revenues:
Revenues	9,161	10,977		26,890	30,272
Ancillary And Other Rental Revenues [Member] | Delivery and Pick-up [Member] | Topic 606 [Member]
Revenues:
Revenues	9,161	10,977		26,890	30,272
Ancillary And Other Rental Revenues [Member] | Other [Member]
Revenues:
Revenues	7,266	8,358		20,455	23,997
Ancillary And Other Rental Revenues [Member] | Other [Member] | Topic 842 [Member]
Revenues:
Revenues	7,266	8,358		20,455	23,997
Total Equipment Rental Revenues [Member]
Revenues:
Revenues	165,849	204,132		496,162	572,563
Total Equipment Rental Revenues [Member] | Topic 842 [Member]
Revenues:
Revenues	156,520	192,850		468,642	541,467
Total Equipment Rental Revenues [Member] | Topic 606 [Member]
Revenues:
Revenues	9,329	11,282		27,520	31,096
New Equipment Sales [Member]
Revenues:
Revenues	37,248	65,010		112,068	177,709
New Equipment Sales [Member] | Topic 606 [Member]
Revenues:
Revenues	37,248	65,010		112,068	177,709
Used Equipment Sales [Member]
Revenues:
Revenues	40,000	31,180		105,231	96,942
Used Equipment Sales [Member] | Topic 606 [Member]
Revenues:
Revenues	40,000	31,180		105,231	96,942
Parts Sales [Member]
Revenues:
Revenues	27,853	31,499		83,842	93,798
Parts Sales [Member] | Topic 606 [Member]
Revenues:
Revenues	27,853	31,499		83,842	93,798
Parts and Services [Member]
Revenues:
Revenues	15,637	18,105		48,116	50,398
Parts and Services [Member] | Topic 606 [Member]
Revenues:
Revenues	15,637	18,105		48,116	50,398
Other [Member]
Revenues:
Revenues	2,673	3,071		8,099	8,822
Other [Member] | Topic 606 [Member]
Revenues:
Revenues	$ 2,673	$ 3,071		$ 8,099	$ 8,822