Intangible Assets

12 Months Ended

Dec. 31, 2011

Intangible Assets [Abstract]

Intangible Assets

7. INTANGIBLE ASSETS

Intangible assets consist of the following:

	December 31,
	2011			2010
Amortizable intangible assets:
Product technology	$	10,009		$	10,501
Patents		7,287			6,523
Other		7,535			7,539
Total		24,831			24,563
Accumulated amortization		(17,982	)		(17,359	)
Intangible assets - net	$	6,849		$	7,204

Amortization expense was $1,318, $1,484 and $1,387 in 2011, 2010 and 2009, respectively. The estimated amortization expense for each of the years 2012 through 2016 and thereafter is as follows:

Years ending December 31,	Amount
2012	$	1,091
2013		916
2014		825
2015		825
2016		755
Thereafter		2187
	$	6,599