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Commitments And Contingencies (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 28, 2015
USD ($)
item
Aug. 23, 2013
lawsuit
item
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
lawsuit
Jun. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Other Commitments [Line Items]              
Rent expense under operating leases     $ 2,919 $ 3,408 $ 6,175 $ 6,612  
Supply commitments for printer assemblies     40,634   40,634   $ 50,663
Total liabilities recorded for earnouts     9,468   $ 9,468   9,832
Number of lawsuits filed | lawsuit   2     6    
Number of alleged causes of action | item   7          
Number of alleged breaches of contract | item 2            
Provision for litigation award $ 11,282            
Redeemable noncontrolling interests     8,872   $ 8,872   $ 8,872
Alleged actual damages 7,254            
Fees and expenses 2,318            
Prejudgment interest $ 1,710            
Potential Future Payment [Member] | Put Option [Member]              
Other Commitments [Line Items]              
Aggregate amount to owner upon exercise     $ 8,872   $ 8,872