Property and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2018

Property Plant And Equipment [Abstract]

Property and Equipment

Balances of major classes of assets and allowances for depreciation and depletion are included in property and equipment, net in the condensed consolidated balance sheets and were as follows:

(in thousands)	June 30, 2018		December 31, 2017		June 30, 2017
Equipment and vehicles	$	933,951	$	778,549	$	774,903
Quarry property		178,809		182,267		176,041
Land and land improvements		141,549		108,830		111,766
Buildings and leasehold improvements		105,038		82,601		84,113
Office furniture and equipment		63,806		56,894		58,377
Property and equipment		1,423,153		1,209,141		1,205,200
Less: accumulated depreciation and depletion		827,366		801,723		791,121
Property and equipment, net	$	595,787	$	407,418	$	414,079