Property and Equipment, Net (Tables)

9 Months Ended

Sep. 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)	September 30, 2018		December 31, 2017		September 30, 2017
Equipment and vehicles	$	917,186	$	778,549	$	778,010
Quarry property		180,004		182,267		177,427
Land and land improvements		138,875		108,830		113,384
Buildings and leasehold improvements		105,895		82,601		83,914
Office furniture and equipment		63,354		56,894		59,791
Property and equipment		1,405,314		1,209,141		1,212,526
Less: accumulated depreciation and depletion		844,696		801,723		800,352
Property and equipment, net	$	560,618	$	407,418	$	412,174