Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Total revenues	$ 385,483	$ 368,065
Lease revenue	5,658	4,849
Total revenues from contracts with all customers	391,141	372,914
United States
Disaggregation of Revenue [Line Items]
Total revenues	311,085	298,566
Lease revenue	5,658	4,849
Total revenues from contracts with all customers	316,743	303,415
Australia
Disaggregation of Revenue [Line Items]
Total revenues	58,225	52,285
Lease revenue	0	0
Total revenues from contracts with all customers	58,225	52,285
New Zealand
Disaggregation of Revenue [Line Items]
Total revenues	8,193	8,121
Lease revenue	0	0
Total revenues from contracts with all customers	8,193	8,121
Argentina
Disaggregation of Revenue [Line Items]
Total revenues	3,418	4,766
Lease revenue	0	0
Total revenues from contracts with all customers	3,418	4,766
Canada
Disaggregation of Revenue [Line Items]
Total revenues	4,562	4,327
Lease revenue	0	0
Total revenues from contracts with all customers	4,562	4,327
Warehouse rent and storage
Disaggregation of Revenue [Line Items]
Total revenues	120,124	114,873
Warehouse rent and storage | United States
Disaggregation of Revenue [Line Items]
Total revenues	104,360	98,706
Warehouse rent and storage | Australia
Disaggregation of Revenue [Line Items]
Total revenues	10,339	9,384
Warehouse rent and storage | New Zealand
Disaggregation of Revenue [Line Items]
Total revenues	3,872	4,425
Warehouse rent and storage | Argentina
Disaggregation of Revenue [Line Items]
Total revenues	1,553	2,358
Warehouse rent and storage | Canada
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Warehouse services
Disaggregation of Revenue [Line Items]
Total revenues	160,790	156,141
Warehouse services | United States
Disaggregation of Revenue [Line Items]
Total revenues	125,248	123,549
Warehouse services | Australia
Disaggregation of Revenue [Line Items]
Total revenues	30,438	28,128
Warehouse services | New Zealand
Disaggregation of Revenue [Line Items]
Total revenues	4,117	3,497
Warehouse services | Argentina
Disaggregation of Revenue [Line Items]
Total revenues	987	967
Warehouse services | Canada
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Third-party managed
Disaggregation of Revenue [Line Items]
Total revenues	63,826	58,317
Third-party managed | United States
Disaggregation of Revenue [Line Items]
Total revenues	56,015	52,486
Third-party managed | Australia
Disaggregation of Revenue [Line Items]
Total revenues	3,249	1,504
Third-party managed | New Zealand
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Third-party managed | Argentina
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Third-party managed | Canada
Disaggregation of Revenue [Line Items]
Total revenues	4,562	4,327
Transportation
Disaggregation of Revenue [Line Items]
Total revenues	38,345	36,181
Transportation | United States
Disaggregation of Revenue [Line Items]
Total revenues	23,064	21,272
Transportation | Australia
Disaggregation of Revenue [Line Items]
Total revenues	14,199	13,269
Transportation | New Zealand
Disaggregation of Revenue [Line Items]
Total revenues	204	199
Transportation | Argentina
Disaggregation of Revenue [Line Items]
Total revenues	878	1,441
Transportation | Canada
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Quarry
Disaggregation of Revenue [Line Items]
Total revenues	2,398	2,553
Quarry | United States
Disaggregation of Revenue [Line Items]
Total revenues	2,398	2,553
Quarry | Australia
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Quarry | New Zealand
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Quarry | Argentina
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Quarry | Canada
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 0