Property, Plant and Equipment

12 Months Ended

Dec. 31, 2014

E. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consist of the following:


	2014		2013
	(in thousands)
Land	$	16,561	$	16,561
Buildings		108,671		107,632
Machinery and equipment		659,743		600,848
Furniture and fixtures, and software		77,566		81,994
Leasehold improvements		31,981		30,757
Construction in progress		2,508		622

		897,030		838,414
Less: accumulated depreciation		567,992		563,178

	$	329,038	$	275,236

Depreciation of property, plant and equipment for the years ended December 31, 2014, 2013 and 2012 was $73.4 million, $57.3 million and $55.0 million, respectively. As of December 31, 2014, $66.9 million of gross book value included in machinery and equipment was for internally manufactured test systems being leased by customers. As of December 31, 2014, the accumulated depreciation on these test systems was $10.1 million. As of December 31, 2014, minimum non-cancelable future lease payments for the year ending December 31, 2015, total approximately $13.9 million, in the aggregate. There are no payments due beyond 2015.

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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