Property, Plant and Equipment, Net

12 Months Ended

Dec. 31, 2016

Property Plant And Equipment [Abstract]

Property, Plant and Equipment, Net

Note F: Property, Plant and Equipment, Net

December 31

(add 000)	2016			2015
Land and land improvements	$	915,158		$	865,700
Mineral reserves and interests		1,114,560			1,001,295
Buildings		151,115			144,076
Machinery and equipment		3,766,975			3,473,826
Construction in progress		167,722			128,301
		6,115,530			5,613,198
Less accumulated depreciation, depletion and amortization		(2,692,135	)		(2,457,198	)
Total	$	3,423,395		$	3,156,000

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

(add 000)	2016			2015
Machinery and equipment under capital leases	$	23,117		$	19,379
Less accumulated amortization		(8,077	)		(5,102	)
Total	$	15,040		$	14,277

Depreciation, depletion and amortization expense related to property, plant and equipment was $268,935,000, $246,874,000 and $211,242,000 for the years ended December 31, 2016, 2015 and 2014, respectively. Depreciation, depletion and amortization expense includes amortization of machinery and equipment under capital leases.

Interest cost of $3,543,000, $5,832,000 and $8,033,000 was capitalized during 2016, 2015 and 2014, respectively.

At December 31, 2016 and 2015, $58,332,000 and $58,937,000, respectively, of the Building Materials business’ net property, plant and equipment were located in foreign countries, namely the Bahamas and Canada.