Property, Plant and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment, Net

December 31
(add 000)	2013			2012
Land and land improvements	$	728,396		$	645,095
Mineral reserves and interests		461,587			430,884
Buildings		118,655			116,332
Machinery and equipment		2,575,340			2,511,222
Construction in progress		92,906			109,054
		3,976,884			3,812,587
Less allowances for depreciation, depletion and amortization		(2,177,643	)		(2,059,346	)
Total	$	1,799,241		$	1,753,241