Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

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)	2014		2013
Land and land improvements	0-15	$	7,044	$	7,008
Buildings and building equipment	15	59,754		63,225
Machinery, tools and equipment	5-12	86,513		93,403
Leasehold improvements (1)	10	24,871		26,858
Computer equipment	3-5	57,859		79,719
Computer software	5-10	162,690		154,622
Furniture and fixtures	5-8	65,409		71,492
Tooling	3-5	94,571		85,560
Construction in progress		54,183		17,207
Total property plant and equipment, at cost		$	612,894	$	599,094
Less accumulated depreciation and amortization		443,388		438,199
Total property plant and equipment, net		$	169,506	$	160,895

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