Goodwill and Other Intangible Asset Data (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Amortized Intangible Assets

Intangible asset data are as follows (in thousands):

	As of December 31, 2013
	Gross Amount		Accumulated Amortization			Net Amount
Amortized intangible assets
Current technology	$	23,778	$	(14,060	)	$	9,718
Patent and patent rights		29,569		(17,919	)		11,650
Customer relationships		52,893		(5,293	)		47,600
Total	$	106,240	$	(37,272	)	$	68,968
			$	7,383

As of December 31, 2012
	Gross Amount		Accumulated Amortization			Net Amount
Amortized intangible assets
Current technology	$	18,978	$	(12,391	)	$	6,587
Patent and patent rights		29,569		(14,618	)		14,951
Customer relationships		20,493		(2,880	)		17,613
Total	$	69,040	$	(29,889	)	$	39,151
Amortization expense for the year ended December 31, 2012			$	4,673

Estimated Amortization Expense

Estimated amortization expense:
For the year ended December 31, 2014	$	10,533
For the year ended December 31, 2015		9,769
For the year ended December 31, 2016		9,331
For the year ended December 31, 2017		8,100
For the year ended December 31, 2018		5,867
Thereafter		25,368
Total	$	68,968

Changes in Net Carrying Value of Goodwill

Changes in the net carrying value amount of goodwill were as follows (in thousands):

	Total
Unamortized intangible assets:
Goodwill at gross cost	$	180,731
Impairment charge – 2008		(101,028	)
Goodwill as of December 31, 2011		79,703
Acquisition – LaserBand		24,353
Impairment charge – 2012		(9,114	)
Goodwill as of December 31, 2012		94,942
Acquisition – Hart Systems		60,858
Goodwill as of December 31, 2013	$	155,800