Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill (Components Intangible Assets) (Details)

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Intangible Assets and Goodwill (Components Intangible Assets) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 15,210 $ 15,337
Accumulated amortization (10,008) (9,042)
Net identifiable intangible assets 5,202 6,295
Customer Relationships    
Finite-Lived Intangible Assets [Line Items]    
Original cost 4,883 4,928
Accumulated amortization (2,465) (2,194)
Net identifiable intangible assets 2,418 2,734
Developed Technology    
Finite-Lived Intangible Assets [Line Items]    
Original cost 8,145 8,225
Accumulated amortization (6,669) (6,043)
Net identifiable intangible assets 1,476 2,182
Trademarks / Trade-Names    
Finite-Lived Intangible Assets [Line Items]    
Original cost 2,182 2,184
Accumulated amortization (874) (805)
Net identifiable intangible assets $ 1,308 $ 1,379