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
6 Months Ended 12 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 15,159 $ 14,885
Accumulated amortization (7,917) (6,775)
Net identifiable intangible assets $ 7,242 $ 8,110
Weighted-average useful lives (years) 9 years 9 years
Customer Relationships    
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 4,854 $ 4,759
Accumulated amortization (1,881) (1,577)
Net identifiable intangible assets $ 2,973 $ 3,182
Weighted-average useful lives (years) 10 years 10 years
Developed Technology    
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 8,091 $ 7,917
Accumulated amortization (5,272) (4,509)
Net identifiable intangible assets $ 2,819 $ 3,408
Weighted-average useful lives (years) 6 years 6 years
Trademarks / Trade-Names    
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 2,181 $ 2,178
Accumulated amortization (731) (658)
Net identifiable intangible assets $ 1,450 $ 1,520
Weighted-average useful lives (years) 15 years 15 years
Covenants Not to Compete    
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 33 $ 31
Accumulated amortization (33) (31)
Net identifiable intangible assets $ 0 $ 0
Weighted-average useful lives (years) 2 years 2 years