Acquisitions (Narrative) (Details) (USD $)	3 Months Ended		0 Months Ended	3 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended	0 Months Ended	1 Months Ended		12 Months Ended	0 Months Ended													1 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 19, 2012 Thomas Medical Products, Inc [Member]	Mar. 31, 2013 Thomas Medical Products, Inc [Member]	Dec. 31, 2012 Thomas Medical Products, Inc [Member]	Nov. 19, 2012 MediGroup [Member]	Dec. 31, 2012 MediGroup [Member]	Jan. 31, 2012 Ostial Solutions, LLC [Member]	Aug. 31, 2012 Ostial Solutions, LLC [Member]	Jan. 31, 2012 Ostial Solutions, LLC [Member]	Dec. 31, 2012 Ostial Solutions, LLC [Member]	Dec. 19, 2012 Developed Technology Rights [Member] Thomas Medical Products, Inc [Member]	Nov. 19, 2012 Developed Technology Rights [Member] MediGroup [Member]	Jan. 31, 2012 Developed Technology Rights [Member] Ostial Solutions, LLC [Member]	Dec. 19, 2012 Customer Lists [Member] Thomas Medical Products, Inc [Member]	Nov. 19, 2012 Customer Lists [Member] MediGroup [Member]	Jan. 31, 2012 Customer Lists [Member] Ostial Solutions, LLC [Member]	Dec. 19, 2012 Noncompete Agreements [Member] Thomas Medical Products, Inc [Member]	Nov. 19, 2012 Noncompete Agreements [Member] MediGroup [Member]	Jan. 31, 2012 Noncompete Agreements [Member] Ostial Solutions, LLC [Member]	Dec. 19, 2012 Trademarks [Member] Thomas Medical Products, Inc [Member]	Nov. 19, 2012 Trademarks [Member] MediGroup [Member]	Jan. 31, 2012 Trademarks [Member] Ostial Solutions, LLC [Member]	Dec. 19, 2012 Credit Agreement [Member]	Jan. 31, 2013 Intellectual Property Rights [Member]	May 31, 2012 Intellectual Property Rights [Member]	Dec. 31, 2011 Intellectual Property Rights [Member]
Business Acquisition [Line Items]
Payments to acquire businesses			$ 167,000,000			$ 4,000,000			$ 6,500,000	$ 10,000,000
Business combination, liabilities incurred			445,000
Pro forma information, revenue					1,900,000		169,000				457,000
Pro forma information, income before tax					51,000
Acquired receivables, gross contractual amount			6,500,000
Acquired receivables, estimated uncollectible			34,000
Useful life												8 years	8 years	15 years	12 years	8 years	8 years	3 years	7 years	5 years	15 years	15 years	15 years
Weighted-average amortization period			8 years 6 months 18 days			8 years 1 month 24 days		14 years 7 months 6 days
Payments of long-term debt issuance costs																								3,700,000
Acquisition-related costs				467,000	2,700,000
Contingent consideration, payment in 2013						150,000
Contingent consideration, payment in 2014						150,000
Contingent consideration, payment in 2015						150,000
Contingent consideration, potential payment in 2016						150,000
Contingent consideration, potential payment in 2017						150,000
Contingent consideration, potential payment in 2018						150,000
Contingent consideration, potential payment in 2019						150,000
Contingent consideration, potential payment in 2020						150,000
Contingent consideration, potential payment in 2021						150,000
Contingent consideration, potential payment in 2022						150,000
Contingent consideration, potential payment, annual increase in net sales, minimum percent						8.00%
Contingent consideration, liability						403,000		4,300,000		4,300,000
Contingent consideration, potential payment								13,500,000
Acquired in-process research and development	$ 0	$ 175,000																							$ 1,000,000	$ 1,000,000	$ 2,000,000