Business Combinations - Summary of Hi-Rail Assets (Details) - USD ($) $ in Thousands			6 Months Ended
	Jun. 30, 2022	Jan. 14, 2022	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill	$ 705,973		$ 705,973	$ 705,973		$ 695,865
Net cash paid				49,832	$ 1,334,285
Hi-Rail
Business Acquisition [Line Items]
Current assets	2,783	$ 2,891	2,783	2,783
Changes in current assets			(108)
Property, equipment and other assets	138	819	138	138
Changes in property, equipment and other assets			(681)
Rental equipment	34,224	34,224	34,224	34,224
Changes in rental equipment			0
Total identifiable assets acquired	37,145	37,934	37,145	37,145
Changes in total identifiable assets acquired			(789)
Total identifiable liabilities assumed	(7,325)	(6,011)	(7,325)	(7,325)
Changes in total identifiable liabilities assumed			(1,314)
Total net assets	29,820	31,923	29,820	29,820
Changes in total net assets			(2,103)
Goodwill	10,107	8,685	10,107	10,107
Changes in goodwill			1,422
Intangible assets	11,027	11,027	11,027	11,027
Changes in intangible assets			0
Net assets acquired (purchase price)	50,954	51,635	50,954	$ 50,954
Changes in net assets acquired (purchase price)			(681)
Less: cash acquired	(1,122)	(1,122)
Changes in less: cash acquired			0
Net cash paid	$ 49,832	$ 50,513
Changes in net cash paid			$ (681)