Fair Value Measurements (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended						3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Other Long-Term Obligations [Member]	Dec. 31, 2012 Other Long-Term Obligations [Member]	Sep. 30, 2013 Accrued Expenses [Member]	Dec. 31, 2012 Accrued Expenses [Member]	Sep. 30, 2013 Ostial Solutions, LLC [Member]	Sep. 30, 2012 Ostial Solutions, LLC [Member]	Sep. 30, 2013 Ostial Solutions, LLC [Member]	Sep. 30, 2012 Ostial Solutions, LLC [Member]	Sep. 30, 2013 Developed Technology Rights [Member] Ostial Solutions, LLC [Member]	Sep. 30, 2013 Other Intangible Assets [Member] Ostial Solutions, LLC [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability in other long-term obligations					$ 2,300,000	$ 5,900,000
Contingent consideration liability in accrued expenses							214,000	723,000
Reductions to contingent consideration liability											3,800,000
Write-off of patents and intangible assets	8,116,000	17,000	8,169,000	27,000					8,089,000	0	8,089,000	0
Finite-lived Intangible Assets, Fair Value Disclosure													$ 1,500,000	$ 160,000