Goodwill and Intangible Assets (Intangible assets) (Details) - USD ($)
$ in Thousands |
12 Months Ended |
|
Dec. 31, 2017 |
Dec. 31, 2016 |
| Intangible assets |
|
|
| Gross Carrying Amount |
$ 38,706
|
$ 30,519
|
| Accumulated Amortization |
(12,625)
|
(7,399)
|
| Intangible assets, net |
$ 26,081
|
23,120
|
| Weighted average amortization period |
7 years 3 months 18 days
|
|
| Developed technology |
|
|
| Intangible assets |
|
|
| Gross Carrying Amount |
$ 19,626
|
16,618
|
| Accumulated Amortization |
(8,914)
|
(5,738)
|
| Intangible assets, net |
$ 10,712
|
10,880
|
| Weighted average amortization period |
5 years 7 months 6 days
|
|
| Customer relationships |
|
|
| Intangible assets |
|
|
| Gross Carrying Amount |
$ 12,009
|
9,196
|
| Accumulated Amortization |
(2,556)
|
(1,160)
|
| Intangible assets, net |
$ 9,453
|
8,036
|
| Weighted average amortization period |
8 years 4 months 24 days
|
|
| Trademark/trade name |
|
|
| Intangible assets |
|
|
| Gross Carrying Amount |
$ 6,776
|
4,410
|
| Accumulated Amortization |
(869)
|
(337)
|
| Intangible assets, net |
$ 5,907
|
4,073
|
| Weighted average amortization period |
12 years
|
|
| Non-competition agreements |
|
|
| Intangible assets |
|
|
| Gross Carrying Amount |
$ 295
|
295
|
| Accumulated Amortization |
(286)
|
(164)
|
| Intangible assets, net |
$ 9
|
$ 131
|
| Weighted average amortization period |
2 years
|
|