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Business Combinations (Details 2) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |
Goodwill | $ 681,358,000 | $ 708,664,000 | $ 679,395,000 | $ 664,922,000
2019 Acquisition |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Gross Aggregate Consideration | 56,800,000 |  |  |
Debt Assumed | 1,200,000 |  |  |
Current Assets | 15,800,000 |  |  |
Property, Plant, and Equipment | 16,700,000 |  |  |
Goodwill | 23,100,000 |  |  |
Other Intangibles | 6,700,000 |  |  |
Deferred Charges and Other Assets | 500,000 |  |  |
Current Liabilities | 5,900,000 |  |  |
Deferred Credits and Other Liabilities | $ 100,000 |  |  |

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