Property, Plant and Equipment, Net

12 Months Ended

Dec. 31, 2014

Property Plant And Equipment [Abstract]

Property, Plant and Equipment, Net

Note F: Property, Plant and Equipment, Net

December 31

(add 000)	2014			2013
Land and land improvements	$	849,704		$	728,396
Mineral reserves and interests		990,438			461,587
Buildings		157,233			118,655
Machinery and equipment		3,568,342			2,575,340
Construction in progress		125,959			92,906
		5,691,676			3,976,884
Less allowances for depreciation, depletion and amortization		(2,288,906	)		(2,177,643	)
Total	$	3,402,770		$	1,799,241

The gross asset value and related allowance for amortization for machinery and equipment recorded under capital leases at December 31 were as follows:

(add 000)	2014			2013
Machinery and equipment under capital leases	$	25,775		$	10,341
Less allowance for amortization		(2,808	)		(104	)
Total	$	22,967		$	10,237

Depreciation, depletion and amortization expense related to property, plant and equipment was $211,242,000, $168,333,000 and $171,940,000 for the years ended December 31, 2014, 2013 and 2012, respectively. Depreciation, depletion and amortization expense for 2014 and 2013 includes amortization of machinery and equipment under capital leases.

Interest cost of $8,033,000, $1,792,000 and $2,537,000 was capitalized during 2014, 2013 and 2012, respectively.

At December 31, 2014 and 2013, $68,340,000 and $62,826,000, respectively, of the Aggregates business’ net property, plant and equipment were located in foreign countries, namely the Bahamas and Canada.