Supplemental Financial Information (Summary of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Contingent consideration	$ 24,802	$ 18,530
CRM purchase price adjustment payable to MicroPort Scientific Corporation	14,891	14,891
Legal and administrative costs	13,200	9,189
Operating lease liabilities	10,565	0
Product remediation	7,444	13,945
Contract liabilities	5,628	3,304
Research and development costs	5,109	1,841
Provisions for agents, returns and other	4,038	4,934
Restructuring related liabilities	2,621	9,393
Derivative contract liabilities	3,455	5,063
Other amounts payable to MicroPort Scientific Corporation	852	9,319
Other accrued expenses	35,851	33,876
Accrued liabilities	128,456	124,285
Contract liability	$ 7,100	$ 4,800