Condensed Consolidated Statements Of Operations And Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue:
Products	$ 68,452	$ 49,397
Services	33,627	28,523
Total revenue	102,079	77,920
Cost of sales:
Products	29,745	23,047
Services	18,857	16,020
Total cost of sales	48,602	39,067
Gross profit	53,477	38,853
Operating expenses:
Selling, general and administrative	29,454	23,950
Research and development	6,504	4,933
Total operating expenses	35,958	28,883
Income from operations	17,519	9,970
Interest and other expense, net	10,067	2,682
Income before income taxes	7,452	7,288
Provision for income taxes	1,569	1,100
Net income	5,883	6,188
Other comprehensive income
Unrealized gain (loss) on pension obligation	29	(6)
Foreign currency translation gain (loss)	(3,261)	1,190
Comprehensive income	$ 2,651	$ 7,372
Net income per share - basic	$ 0.06	$ 0.08
Net income per share - diluted	$ 0.06	$ 0.08