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Goodwill and intangible assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Company's other intangible assets | The Company’s other intangible assets consist of the following:
December 31, |  |  |  |  | 2017 |  | 2016 |
(in thousands) |  | Amortization |  | Gross |  |  |  |  |  |  |  | Gross |  |  |  |  |  |  |
|  | Period |  | Carrying |  | Accumulated |  |  |  |  | Carrying |  | Accumulated |  |  |  |
|  | (in years) |  | Amount |  | Amortization |  | Net |  | Amount |  | Amortization |  | Net |
Intangible Assets with determinable lives |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patents |  |  | 5 |  | $ | 386 |  | $ | 374 |  | $ | 12 |  | $ | 386 |  | $ | 366 |  | $ | 20 |
Covenant Not to Compete |  |  | 6 – 10 |  |  | 1,270 |  |  | 475 |  |  | 795 |  |  | 1,270 |  |  | 322 |  |  | 948 |
Customer Relationships |  |  | 3 – 12 |  |  | 31,660 |  |  | 1,288 |  |  | 30,372 |  |  | 2,000 |  |  | 452 |  |  | 1,548 |
Above Market Leases |  |  | 13 |  |  | 567 |  |  | 10 |  |  | 557 |  |  | — |  |  | — |  |  | — |
Trade Name |  |  | 2 |  |  | 30 |  |  | 30 |  |  | — |  |  | 30 |  |  | 30 |  |  | — |
Licenses |  |  | 10 |  |  | 1,000 |  |  | 317 |  |  | 683 |  |  | 1,000 |  |  | 217 |  |  | 783 |
Totals identifiable intangible assets |  |  |  |  | $ | 34,913 |  | $ | 2,494 |  | $ | 32,419 |  | $ | 4,686 |  | $ | 1,387 |  | $ | 3,299 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance and exist in perpetuity, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b),(d) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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