Discontinued Operations - Interest Expense Reclassified to Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	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