Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 Facilities	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Unremitted Earnings of Foreign Subsidiaries	$ 48,000,000
Impairment of Intangible Assets (Excluding Goodwill)	1,523,000	773,000	1,761,000
Goodwill, Impairment Loss			47,719,000
Research and Development Expense	24,544,000	24,459,000	27,556,000
Advertising Expense	17,530,000	20,017,000	19,523,000
Number of Subsidiaries	2
Asia/Pacific [Member]
Significant Accounting Policies [Line Items]
Goodwill, Impairment Loss			39,729,000
NA/HME [Member]
Significant Accounting Policies [Line Items]
Goodwill, Impairment Loss			7,990,000
Europe [Member]
Significant Accounting Policies [Line Items]
Goodwill, Impairment Loss			0
Convertible Subordinated Debt [Member]
Significant Accounting Policies [Line Items]
Debt Instrument, Convertible, Initial Conversion Price	$ 24.79
Minimum [Member] | Furniture and Fixtures [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3
Minimum [Member] | Building and Building Improvements [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	5
Maximum [Member]
Significant Accounting Policies [Line Items]
Annual Policy Losses Insured per Occurence	10,000,000
Annual Policy Losses, in Aggregate	13,000,000
Annual Policy Losses, External Insurance Coverage, in Aggregate	75,000,000
Maximum [Member] | Furniture and Fixtures [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	10
Maximum [Member] | Building and Building Improvements [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	40
Selling General and Administrative Expense [Member]
Significant Accounting Policies [Line Items]
Allocated Share-based Compensation Expense	5,957,000	6,545,000	6,640,000
Customer Lists [Member] | NA/HME [Member]
Significant Accounting Policies [Line Items]
Impairment of Intangible Assets, Finite-lived			508,000
Customer Lists [Member] | IPG [Member]
Significant Accounting Policies [Line Items]
Impairment of Intangible Assets, Finite-lived			625,000
Intellectual Property [Member] | Asia/Pacific [Member]
Significant Accounting Policies [Line Items]
Impairment of Intangible Assets, Finite-lived			201,000
Trademarks [Member] | Europe [Member]
Significant Accounting Policies [Line Items]
Indefinite-lived Intangible Assets, Impairment Losses			427,000
Trademarks [Member] | IPG [Member]
Significant Accounting Policies [Line Items]
Indefinite-lived Intangible Assets, Impairment Losses	568,000	279,000
Developed Technology Rights [Member] | IPG [Member]
Significant Accounting Policies [Line Items]
Impairment of Intangible Assets, Finite-lived	223,000	398,000
Trademarks, Finite-Lived Intangible Assets [Member] | IPG [Member]
Significant Accounting Policies [Line Items]
Impairment of Intangible Assets, Finite-lived	123,000
Patents [Member] | NA/HME [Member]
Significant Accounting Policies [Line Items]
Impairment of Intangible Assets, Finite-lived		96,000
Trademarks [Member] | Europe [Member]
Significant Accounting Policies [Line Items]
Indefinite-lived Intangible Assets, Impairment Losses			427,000
Customer Lists [Member] | NA/HME [Member]
Significant Accounting Policies [Line Items]
Impairment of Intangible Assets, Finite-lived	167,000		508,000
Customer Lists [Member] | IPG [Member]
Significant Accounting Policies [Line Items]
Impairment of Intangible Assets, Finite-lived	442,000		625,000
Impairment of Intangible Assets [Member] | Asia/Pacific [Member]
Significant Accounting Policies [Line Items]
Segment Reporting, Increase (Decrease) in Long-Lived Assets			$ (201,000)