Discontinued Operations - Interest Expense Reclassified to Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amortization of debt issuance costs			$ 4,981	$ 3,538
Total interest expense of discontinued operations	$ 6,873	$ 3,805	17,036	8,829
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	11,060	10,217	34,410	31,490
Amortization of debt issuance costs	1,215	812	3,692	2,478
Capitalized interest and other	(27)	(101)	(245)	(305)
Total interest expense of discontinued operations	$ 12,248	$ 10,928	$ 37,857	$ 33,663