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Selected Quarterly Financial Data (Unaudited) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information [Line Items]
Restructuring charges									$ 21,671	$ 21,512	$ 17,376
State income taxes, net of federal tax benefit (percent)									3.20%	1.70%	1.80%
Deferred income taxes									$ 2,251	$ (284)	$ 7,218
Cost of Sales [Member]
Quarterly Financial Information [Line Items]
Restructuring charges									8,016	5,612	8,626
Cost of Sales [Member] | Facility Consolidation Costs [Member]
Quarterly Financial Information [Line Items]
Restructuring charges	$ 2,800	$ 1,300	$ 1,500	$ 2,300	$ 1,900	$ 1,400	$ 1,400	$ 900	8,016	5,612	6,489
Selling and Administrative Expenses [Member]
Quarterly Financial Information [Line Items]
Business and asset acquisition costs	2,100
Selling and Administrative Expenses [Member] | Administrative Restructuring [Member]
Quarterly Financial Information [Line Items]
Restructuring charges	$ 4,300	$ 1,100	$ 2,200	$ 6,200	1,500	600	500	700	13,655	3,354	8,750
Selling and Administrative Expenses [Member] | Executive Restructuring [Member]
Quarterly Financial Information [Line Items]
Restructuring charges					1,500	11,000			0	12,546	0
Patent Dispute and Other Matters [Member]
Quarterly Financial Information [Line Items]
Legal Fees							1,400	1,900		1,900
Settlement cost								900		900
Patent Dispute and Other Matters [Member] | Selling and Administrative Expenses [Member]
Quarterly Financial Information [Line Items]
Legal Fees									0	3,374	3,206
Shareholder Activism Costs [Member] | Selling and Administrative Expenses [Member]
Quarterly Financial Information [Line Items]
Shareholder activism costs						2,400	$ 900	$ 600	$ 0	3,966	$ 0
Legal Fees [Member]
Quarterly Financial Information [Line Items]
Legal Fees										$ 1,500
New York [Member]
Quarterly Financial Information [Line Items]
State income taxes, net of federal tax benefit (percent)								0.00%		0.00%
Deferred income taxes								$ 2,300		$ 2,300
EndoDynamix, Inc. [Member] | Selling and Administrative Expenses [Member]
Quarterly Financial Information [Line Items]
Business and asset acquisition costs					$ 300	$ 300

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