Commitments And Contingencies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2007 item
Rent expense under operating leases	$ 1,217	$ 652	$ 3,553	$ 1,921
Supply commitments, printer assembly	13,062	9,146	13,062	9,146
Business acquisition, deferred purchase price	1,885		1,885
Accrued liability recorded for earnouts	6,143	5,158	6,143	5,158
Number of machines associated with claims					2
DSM Desotech [Member]
Estimates of the damages associated with claims	$ 40,000		$ 40,000