Property, Plant And Equipment

12 Months Ended

Dec. 31, 2015

Property, Plant And Equipment [Abstract]

Property, Plant And Equipment

(5) Property, Plant and Equipment

A summary of property, plant and equipment is as follows (in thousands):

	December 31,
	2015		2014
Buildings, improvements and leasehold improvements	$	318,906	$	328,651
Marine vessels and equipment		87		55,494
Machinery and equipment		3,770,959		4,126,570
Automobiles, trucks, tractors and trailers		45,013		66,032
Furniture and fixtures		67,483		75,631
Construction-in-progress		74,683		102,895
Land		58,731		58,814
Oil and gas producing assets		66,285		189,294
Total		4,402,147		5,003,381
Accumulated depreciation and depletion		(2,278,856)		(2,269,542)
Property, plant and equipment, net	$	2,123,291	$	2,733,839

The Company had $84.9 million and $93.3 million of leasehold improvements as of December 31, 2015 and 2014, respectively.  These leasehold improvements are depreciated over the shorter of the life of the asset or the term of the lease using the straight line method.  Depreciation expense (excluding depletion, amortization and accretion) was $584.1 million, $620.6 million, and $572.9 million during 2015, 2014 and 2013, respectively.  During 2015, the Company recorded $343.3 million related to reduction in value of property, plant and equipment (see note 3).