Acquisition, Restructuring and Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Acquisition, Restructuring and Other Expense [Line Items]
Legal Matters		$ 2,500		$ 4,500
Cost of Sales [Member]
Acquisition, Restructuring and Other Expense [Line Items]
Restructuring costs	$ 0	303	$ 0	1,472
Selling and Administrative Expenses [Member]
Acquisition, Restructuring and Other Expense [Line Items]
Business acquisition costs	0	405	0	892
Legal Matters	0	2,465	0	16,714
Acquisition, restructuring and other expense included in selling and administrative expense	0	2,896	0	18,954
Selling and Administrative Expenses [Member] | Administrative Restructuring [Member]
Acquisition, Restructuring and Other Expense [Line Items]
Restructuring costs	0	$ 26	0	1,348
SurgiQuestInc
Acquisition, Restructuring and Other Expense [Line Items]
Loss Contingency, Accrual, Current	$ 12,200		$ 12,200
SurgiQuestInc | Selling and Administrative Expenses [Member]
Acquisition, Restructuring and Other Expense [Line Items]
Loss Contingency, Damages Awarded, Value				12,200
Compensatory damages [Member] | SurgiQuestInc | Selling and Administrative Expenses [Member]
Acquisition, Restructuring and Other Expense [Line Items]
Loss Contingency, Damages Awarded, Value				2,200
Punitive damages [Member] | SurgiQuestInc | Selling and Administrative Expenses [Member]
Acquisition, Restructuring and Other Expense [Line Items]
Loss Contingency, Damages Awarded, Value				$ 10,000