Goodwill and Other Intangibles (Tables)

3 Months Ended

Mar. 31, 2014

Goodwill And Intangible Assets Disclosure [Abstract]

Components of Identifiable Intangible Assets

The components of our identifiable intangible assets were as follows:

	March 31, 2014						December 31, 2013
	Gross				Net		Gross				Net
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Value		Amortization		Value		Value		Amortization		Value
	(in thousands)
Patents	$	5,691	$	2,094	$	3,597	$	5,679	$	1,932	$	3,747
Trademarks and technology licenses		1,416		970		446		1,414		935		479
Customer relationships		2,837		1,581		1,256		2,835		1,441		1,394
Other intangible assets		971		512		459		971		447		524
Total identifiable intangible assets	$	10,915	$	5,157	$	5,758	$	10,899	$	4,755	$	6,144

Amortization Expense Included in General and Administrative Expense

Amortization expense is included in general and administrative expense and is as follows:

	Three months ended March 31,
	2014		2013
	(in thousands)
Amortization expense	$	399	$	262

Estimated Amortization Expense for Remainder of 2014 and Each of Five Succeeding Fiscal Years

Estimated amortization expense for the remainder of 2014 and each of the five succeeding fiscal years is as follows:

	2014		2015		2016		2017		2018		2019
	(in thousands)
Amortization expense	$	1,011	$	1,009	$	866	$	608	$	493	$	383