Note 11 - Property and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Property, Plant and Equipment [Table Text Block]

December 31,	2021		2020
Equipment and vehicles	$	870,672	$	812,388
Quarry property		191,982		206,073
Land and land improvements		108,518		117,714
Buildings and leasehold improvements		96,180		94,754
Office furniture and equipment		75,043		69,828
Property and equipment		1,342,395		1,300,757
Less: accumulated depreciation and depletion		908,891		879,608
Property and equipment, net	$	433,504	$	421,149

Schedule of Change in Asset Retirement Obligation [Table Text Block]

Years Ended December 31,	2021			2020
Beginning balance	$	23,853		$	21,750
Revisions to estimates		1,596			2,484
Liabilities settled		(1,708	)		(1,521	)
Accretion		1,209			1,140
Ending balance	$	24,950		$	23,853