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Organization and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Property and Equipment | Depreciation is computed using the straight-line method over estimated useful lives as follows: ​
​ | ​ | ​
Buildings |  | 40 years
Manufacturing equipment | ​ | 4 - 20 years
Furniture and fixtures | ​ | 3 - 20 years
Land improvements | ​ | 10 - 20 years
Leasehold improvements | ​ | 4 - 25 years
Other assets | Other assets as of December 31, 2020 and 2019 consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
Deferred compensation plan assets | ​ | $ | 17,074 | ​ | $ | 15,053
Investments in privately held companies | ​ | ​ | 12,043 | ​ | ​ | 17,129
Long-term notes receivable | ​ | ​ | 2,196 | ​ | ​ | 2,722
Other | ​ |  | 6,363 | ​ |  | 6,557
Total | ​ | $ | 37,676 | ​ | $ | 41,461
Other Long-term Obligations | Other long-term obligations as of December 31, 2020 and 2019 consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
Contingent consideration liabilities | ​ | $ | 36,917 | ​ | $ | 48,088
Other long-term obligations | ​ | ​ | 15,831 | ​ | ​ | 8,385
Total | ​ | $ | 52,748 | ​ | $ | 56,473

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