Property and Equipment, Net

3 Months Ended

Mar. 31, 2019

Property Plant And Equipment [Abstract]

Property and Equipment, Net

13.  Property and Equipment, net

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)	March 31, 2019		December 31, 2018		March 31, 2018
Equipment and vehicles	$	915,748	$	906,275	$	790,942
Quarry property		191,805		180,246		177,722
Land and land improvements		140,078		142,271		114,607
Buildings and leasehold improvements		108,587		108,884		82,775
Office furniture and equipment		66,176		65,680		57,068
Property and equipment		1,422,394		1,403,356		1,223,114
Less: accumulated depreciation and depletion		869,890		853,668		813,406
Property and equipment, net	$	552,504	$	549,688	$	409,708