Property and Equipment, Net - Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Property Plant And Equipment [Line Items]
Property and equipment	$ 1,445,522	$ 1,403,356	$ 1,423,153
Accumulated depreciation and depletion	888,404	853,668	827,366
Property and equipment, net	557,118	549,688	595,787
Equipment and vehicles [Member]
Property Plant And Equipment [Line Items]
Property and equipment	943,456	906,275	933,951
Quarry property [Member]
Property Plant And Equipment [Line Items]
Property and equipment	191,972	180,246	178,809
Land and land improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment	134,151	142,271	141,549
Building and leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment	109,356	108,884	105,038
Office furniture and equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment	$ 66,587	$ 65,680	$ 63,806