Discontinued Operations - Major Classes of Assets and Liabilities (Details) - Infectious Disease Business - Disposal Group, Disposed of by Sale, Not Discontinued Operations $ in Thousands	Dec. 31, 2017 USD ($)
Assets:
Accounts receivable, net	$ 9,595
Inventory	41,412
Other receivables	2,740
Intangibles, net	282,398
Goodwill	55,057
Total assets held for sale	391,202
Liabilities:
Accounts payable	1,127
Accrued expenses	22,945
Contingent purchase price	35,785
Deferred revenue	723
Total liabilities held for sale	$ 60,580