Segment Reporting - Segment Reporting and Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues:
Leasing	$ 393,192	$ 315,662
Total revenues	508,894	425,323
Costs:
Leasing	88,878	69,895
Depreciation of rental equipment	62,216	55,698
Gross profit	266,815	213,380
Other selected data:
Adjusted EBITDA	191,823	163,585
Selling, general and administrative expense	150,210	117,329
Purchases of rental equipment and refurbishments	95,236	52,535
Delivery and installation
Revenues:
Revenues	100,331	83,504
Costs:
Cost of sales	81,515	70,136
New units
Revenues:
Revenues	6,597	10,955
Total revenues	6,597	10,955
Costs:
Cost of sales	4,326	7,109
Rental units
Revenues:
Revenues	8,774	15,202
Total revenues	8,774	15,202
Costs:
Cost of sales	5,144	9,105
Unallocated Costs
Other selected data:
Adjusted EBITDA	0	0
Selling, general and administrative expense	11,381	11,837
Purchases of rental equipment and refurbishments	0	0
NA Modular | Operating Segments
Revenues:
Leasing	232,978	199,608
Total revenues	299,686	266,224
Costs:
Leasing	63,989	51,075
Depreciation of rental equipment	50,917	46,720
Gross profit	128,931	113,002
Other selected data:
Adjusted EBITDA	103,948	97,371
Selling, general and administrative expense	77,520	62,350
Purchases of rental equipment and refurbishments	57,577	39,135
NA Modular | Operating Segments | Delivery and installation
Revenues:
Revenues	55,634	48,680
Costs:
Cost of sales	49,054	44,705
NA Modular | Operating Segments | New units
Revenues:
Revenues	4,845	7,460
Costs:
Cost of sales	3,257	4,874
NA Modular | Operating Segments | Rental units
Revenues:
Revenues	6,229	10,476
Costs:
Cost of sales	3,538	5,848
NA Storage | Operating Segments
Revenues:
Leasing	118,581	80,351
Total revenues	151,484	107,748
Costs:
Leasing	16,346	10,733
Depreciation of rental equipment	6,631	4,793
Gross profit	105,130	72,619
Other selected data:
Adjusted EBITDA	63,825	46,322
Selling, general and administrative expense	47,938	31,089
Purchases of rental equipment and refurbishments	20,171	3,472
NA Storage | Operating Segments | Delivery and installation
Revenues:
Revenues	29,904	21,365
Costs:
Cost of sales	21,526	15,740
NA Storage | Operating Segments | New units
Revenues:
Revenues	942	2,184
Costs:
Cost of sales	498	1,341
NA Storage | Operating Segments | Rental units
Revenues:
Revenues	2,057	3,848
Costs:
Cost of sales	1,353	2,522
UK Storage | Operating Segments
Revenues:
Leasing	20,571	18,721
Total revenues	27,440	27,007
Costs:
Leasing	4,237	4,296
Depreciation of rental equipment	1,138	914
Gross profit	17,921	16,493
Other selected data:
Adjusted EBITDA	12,544	11,064
Selling, general and administrative expense	6,514	6,343
Purchases of rental equipment and refurbishments	9,615	6,770
UK Storage | Operating Segments | Delivery and installation
Revenues:
Revenues	6,467	6,750
Costs:
Cost of sales	3,923	4,091
UK Storage | Operating Segments | New units
Revenues:
Revenues	128	871
Costs:
Cost of sales	64	589
UK Storage | Operating Segments | Rental units
Revenues:
Revenues	274	665
Costs:
Cost of sales	157	624
Tank and Pump | Operating Segments
Revenues:
Leasing	21,062	16,982
Total revenues	30,284	24,344
Costs:
Leasing	4,306	3,791
Depreciation of rental equipment	3,530	3,271
Gross profit	14,833	11,266
Other selected data:
Adjusted EBITDA	11,506	8,828
Selling, general and administrative expense	6,857	5,710
Purchases of rental equipment and refurbishments	7,873	3,158
Tank and Pump | Operating Segments | Delivery and installation
Revenues:
Revenues	8,326	6,709
Costs:
Cost of sales	7,012	5,600
Tank and Pump | Operating Segments | New units
Revenues:
Revenues	682	440
Costs:
Cost of sales	507	305
Tank and Pump | Operating Segments | Rental units
Revenues:
Revenues	214	213
Costs:
Cost of sales	$ 96	$ 111