Segment Reporting Summary of Revenues (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of Reportable Segments			2
Rental and related revenue	$ 256,815	$ 235,391	$ 768,965	$ 680,520
General contractor and service fee revenue	23,550	26,637	72,384	46,388
Revenues	280,365	262,028	841,349	726,908
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	280,251	261,708	841,054	725,794
Operating Segments [Member] | Industrial Operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	255,315	233,572	764,496	674,996
Operating Segments [Member] | All Other Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	1,386	1,499	4,174	4,410
Operating Segments [Member] | Service Operations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
General contractor and service fee revenue	23,550	26,637	72,384	46,388
Corporate, Non-Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental and related revenue	$ 114	$ 320	$ 295	$ 1,114