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Fair Value Disclosures (Tables) | 12 Months Ended
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Dec. 31, 2020
Fair Value Disclosures |
Schedule of valuation of financial instruments measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Fair Value Measurements at December 31, 2020 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: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-sale securities – equity securities | ​ | $ | 132 | ​ | $ | 132 | ​ | $ | — | ​ | $ | —
Investments measured at net asset value - trading securities | ​ | $ | 32,039 | ​ |  |  | ​ |  |  | ​ |  |
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Fair Value Measurements at December 31, 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: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-sale securities – equity securities | ​ | $ | 237 | ​ | $ | 237 | ​ | $ | — | ​ | $ | —
Investments measured at net asset value - trading securities | ​ | $ | 28,476 | ​ |  |  | ​ |  |  | ​ |  |
Schedule of valuation of financial instruments measured at fair value on a non-recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Fair Value Measurements at December 31, 2020 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: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Assets held for sale | ​ | $ | 4,032 | ​ | $ | — | ​ | $ | 4,032 | ​ | $ | —
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Fair Value Measurements at December 31, 2019 with:
​ | ​ | ​ | ​ | ​ | Quoted prices | ​ | Significant | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | in active | ​ | other | ​ | Significant
​ | ​ | ​ | ​ | ​ | markets for | ​ | observable | ​ | unobservable
(in thousands) |  | Total |  | identical assets |  | inputs |  | inputs
​ | ​ | ​ | ​ | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3)
Assets: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Assets held for sale | ​ | $ | 5,385 | ​ | $ | — | ​ | $ | 5,385 | ​ | $ | —

X
- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 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 (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 3: 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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- 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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