Property, Plant and Equipment

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT

The following is a summary of property, plant and equipment, at cost less accumulated depreciation and amortization as of December 31:

	Estimated Useful Life
	(years)	2013		2012
Land and land improvements	0-15	$	7,008	$	7,652
Buildings and building equipment	15	63,225		67,533
Machinery, tools and equipment	5-12	93,403		118,663
Leasehold improvements (1)	10	26,858		27,026
Computer equipment	3-5	79,719		83,822
Computer software	5-10	154,622		178,590
Furniture and fixtures	5-8	71,492		79,346
Tooling	3-5	85,560		82,539
Construction in progress		17,207		16,739
Total property plant and equipment, at cost		$	599,094	$	661,910
Less accumulated depreciation and amortization		438,199		477,565
Total property plant and equipment, net		$	160,895	$	184,345

(1) The estimated useful life for leasehold improvements is the lesser of 10 years or the term of the lease.

During 2013, 2012 and 2011, depreciation expense, computed on a straight-line basis over the estimated useful lives of the related assets, was $50,151, $51,447 and $50,549, respectively.

During 2013 and 2012, the Company recorded impairment charges of $2,017 and $7,835, respectively, related to its property, plant and equipment. Impairment charges in 2012 related primarily to a portion of the Company's global enterprise resource planning (ERP) system. Previously capitalized software and software-related costs were impaired due to changes in the ERP implementation plan related to configuration and design.