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Discontinued Operations - Interest Expense Reclassified to Discontinued Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Amortization of debt issuance costs | $ 15,692 | $ 4,789 | $ 4,845
Total interest expense of discontinued operations | 18,898 | 13,030 | 11,315
Life Sciences | Discontinued Operations, Disposed of by Sale |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Interest on debt | 35,147 | 40,996 | 46,406
Amortization of debt issuance costs | 13,990 | 3,368 | 3,571
Capitalized interest and other | (244) | (239) | (49)
Total interest expense of discontinued operations | $ 48,893 | $ 44,125 | $ 49,928

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