Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended	12 Months Ended								3 Months Ended	12 Months Ended
	Sep. 30, 2010	Dec. 31, 2011 years	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2009 Trademarks/Brand Names [Member]	Dec. 31, 2009 Innovative Spinal Technologies [Member]	Dec. 31, 2011 Technology [Member]	Dec. 31, 2010 Technology [Member]	Dec. 31, 2009 Technology [Member]	Jun. 30, 2011 Trade Name [Member]	Dec. 31, 2011 Trade Name [Member]	Dec. 31, 2010 Trade Name [Member]	Dec. 31, 2011 Property, Plant and Equipment [Member]	Dec. 31, 2010 Property, Plant and Equipment [Member]	Dec. 31, 2009 Property, Plant and Equipment [Member]	Dec. 31, 2011 Europe [Member]
Summary Of Significant Accounting Policies [Line Items]
Line of Credit Facility converted into a term loan			$ 150.0
Capital Expenditures Incurred but Not yet Paid		6.4	1.1	1.0
Capitalized research and development costs		1.7	0.3
Distribution and handling costs		11.5	9.6	8.3
Charitable contributions		0.3	0.7	0.6
Amortization expense		24.6	17.9	21.0			8.2	5.9	6.6
Annual amortization expense expected to approximate in 2012		25.0
Annual amortization expense expected to approximate in 2013		19.1
Annual amortization expense expected to approximate in 2014		18.1
Annual amortization expense expected to approximate in 2015		16.2
Annual amortization expense expected to approximate in 2016		14.0
Impairment charges					0.6		2.1		0.9	0.9	0.2	0.8
Depreciation													25.5	21.3	18.8
Extended warranties, in years		2
Research and development in process						0.3
Pension Contributions		1.1	1.1	0.4
Accounts receivables from certain European countries customers																5.8
Accounts receivable reserved from certain European countries																0.8
Interest Paid		13.2	8.8	11.3
Income Taxes Paid		14.5	23.4	20.5
Stock options exercised			282,086
Fair market value of shares tendered in lieu of cash	$ 3.1
Number Of Shares Tendered			73,546