Property and Equipment, Net - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Line Items]
Property and equipment	$ 1,403,356	$ 1,209,141
Accumulated depreciation and depletion	853,668	801,723
Property and equipment, net	549,688	407,418
Depreciation and Depletion	96,400	63,800	$ 61,000
Equipment and vehicles [Member]
Property Plant And Equipment [Line Items]
Property and equipment	906,275	778,549
Quarry property [Member]
Property Plant And Equipment [Line Items]
Property and equipment	180,246	182,267
Land and land improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment	142,271	108,830
Building and leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment	108,884	82,601
Office furniture and equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment	$ 65,680	$ 56,894