Property and Equipment, Net - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Less: accumulated depreciation and amortization on property and equipment	$ (52,505)	$ (44,050)
Property and equipment, net	353,486	296,839
Land and site improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	55,839	45,702
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	146,056	123,705
Transportation fleet
Property, Plant and Equipment [Line Items]
Property and equipment, gross	85,827	65,760
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	39,902	36,452
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	24,903	20,675
Total property and equipment excluding construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	352,527	292,294
Property and equipment, net	300,022	248,244
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 53,464	$ 48,595