Property and Equipment, Net - Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Property Plant And Equipment [Line Items]
Property and equipment	$ 1,423,153	$ 1,209,141	$ 1,205,200
Accumulated depreciation and depletion	827,366	801,723	791,121
Property and equipment, net	595,787	407,418	414,079
Equipment and vehicles [Member]
Property Plant And Equipment [Line Items]
Property and equipment	933,951	778,549	774,903
Quarry property [Member]
Property Plant And Equipment [Line Items]
Property and equipment	178,809	182,267	176,041
Land and land improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment	141,549	108,830	111,766
Building and leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment	105,038	82,601	84,113
Office furniture and equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment	$ 63,806	$ 56,894	$ 58,377