Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2012

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment [Table Text Block]

Property, plant and equipment consisted of the following (in thousands):

	December 31,
	2012			2011
Land	$	7,806		$	7,780
Buildings and improvements	21,645			21,478
Leasehold improvements	16,503			11,296
Machinery and equipment	108,982			81,046
Demonstration systems	29,986			29,899
Other fixed assets	46,510			40,343
Gross property, plant and equipment	231,432			191,842
Accumulated depreciation	(121,560		)	(106,760		)
Total property, plant and equipment, net	$	109,872		$	85,082