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FAIR VALUE DISCLOSURES (Tables) | 6 Months Ended
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Jun. 30, 2019
FAIR VALUE DISCLOSURES |
Schedule of valuation of financial instruments measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Fair Value Measurements at June 30, 2019 with:
​ | ​ | ​ | ​ | ​ | Quoted prices in | ​ | Significant | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | active markets | ​ | other | ​ | Significant
​ | ​ | ​ | ​ | ​ | for identical | ​ | observable | ​ | unobservable
(in thousands) |  | Total |  | assets |  | inputs |  | inputs
​ | ​ | ​ | ​ | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3)
Assets: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Equity securities | ​ | $ | 232 | ​ | $ | 232 | ​ | $ | — | ​ | $ | —
Investments measured at net asset value | ​ | $ | 26,454 | ​ |  |  | ​ |  |  | ​ |  |
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Fair Value Measurements at December 31, 2018 with:
​ | ​ | ​ | ​ | ​ | Quoted prices in | ​ | Significant | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | active markets | ​ | other | ​ | Significant
​ | ​ | ​ | ​ | ​ | for identical | ​ | observable | ​ | unobservable
(in thousands) |  | Total |  | assets |  | inputs |  | inputs
​ | ​ | ​ | ​ | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3)
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity securities | ​ | $ | 211 | ​ | $ | 211 | ​ | $ | — | ​ | $ | —
Investments measured at net asset value | ​ | $ | 22,815 | ​ |  |  | ​ |  |  | ​ |  |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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