Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenues	$ 396,778	$ 383,995	$ 1,171,513	$ 1,126,274
Lease revenue	5,232	5,506	16,305	15,593
Total revenues from contracts with all customers	402,010	389,501	1,187,818	1,141,867
Warehouse rent and storage
Disaggregation of Revenue [Line Items]
Total revenues	124,868	122,369	364,966	354,483
Warehouse services
Disaggregation of Revenue [Line Items]
Total revenues	167,181	162,773	490,350	478,155
Third-party managed
Disaggregation of Revenue [Line Items]
Total revenues	62,500	60,506	192,032	178,411
Transportation
Disaggregation of Revenue [Line Items]
Total revenues	40,194	35,688	117,427	107,665
Quarry
Disaggregation of Revenue [Line Items]
Total revenues	2,035	2,659	6,738	7,560
United States
Disaggregation of Revenue [Line Items]
Total revenues	326,025	309,514	953,990	911,735
Lease revenue	5,232	5,506	16,305	15,593
Total revenues from contracts with all customers	331,257	315,020	970,295	927,328
United States | Warehouse rent and storage
Disaggregation of Revenue [Line Items]
Total revenues	110,351	104,710	319,690	304,273
United States | Warehouse services
Disaggregation of Revenue [Line Items]
Total revenues	132,723	128,287	386,027	378,730
United States | Third-party managed
Disaggregation of Revenue [Line Items]
Total revenues	54,809	53,266	168,431	158,476
United States | Transportation
Disaggregation of Revenue [Line Items]
Total revenues	26,107	20,592	73,104	62,696
United States | Quarry
Disaggregation of Revenue [Line Items]
Total revenues	2,035	2,659	6,738	7,560
Australia
Disaggregation of Revenue [Line Items]
Total revenues	55,637	56,633	170,229	161,845
Lease revenue	0	0	0	0
Total revenues from contracts with all customers	55,637	56,633	170,229	161,845
Australia | Warehouse rent and storage
Disaggregation of Revenue [Line Items]
Total revenues	9,815	10,639	29,759	29,613
Australia | Warehouse services
Disaggregation of Revenue [Line Items]
Total revenues	29,390	29,834	89,156	85,739
Australia | Third-party managed
Disaggregation of Revenue [Line Items]
Total revenues	3,142	2,463	9,764	6,247
Australia | Transportation
Disaggregation of Revenue [Line Items]
Total revenues	13,290	13,697	41,550	40,246
Australia | Quarry
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
New Zealand
Disaggregation of Revenue [Line Items]
Total revenues	7,941	8,527	24,358	24,935
Lease revenue	0	0	0	0
Total revenues from contracts with all customers	7,941	8,527	24,358	24,935
New Zealand | Warehouse rent and storage
Disaggregation of Revenue [Line Items]
Total revenues	3,598	4,658	11,425	13,666
New Zealand | Warehouse services
Disaggregation of Revenue [Line Items]
Total revenues	4,173	3,667	12,390	10,695
New Zealand | Third-party managed
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
New Zealand | Transportation
Disaggregation of Revenue [Line Items]
Total revenues	170	202	543	574
New Zealand | Quarry
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Argentina
Disaggregation of Revenue [Line Items]
Total revenues	2,626	4,544	9,099	14,071
Lease revenue	0	0	0	0
Total revenues from contracts with all customers	2,626	4,544	9,099	14,071
Argentina | Warehouse rent and storage
Disaggregation of Revenue [Line Items]
Total revenues	1,104	2,362	4,092	6,931
Argentina | Warehouse services
Disaggregation of Revenue [Line Items]
Total revenues	895	985	2,777	2,991
Argentina | Third-party managed
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Argentina | Transportation
Disaggregation of Revenue [Line Items]
Total revenues	627	1,197	2,230	4,149
Argentina | Quarry
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Canada
Disaggregation of Revenue [Line Items]
Total revenues	4,549	4,777	13,837	13,688
Lease revenue	0	0	0	0
Total revenues from contracts with all customers	4,549	4,777	13,837	13,688
Canada | Warehouse rent and storage
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Canada | Warehouse services
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Canada | Third-party managed
Disaggregation of Revenue [Line Items]
Total revenues	4,549	4,777	13,837	13,688
Canada | Transportation
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Canada | Quarry
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 0	$ 0	$ 0