Business Segment, Product and Geographic Information Business Segment, Product and Geographic Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013		Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net	$ 190,815	$ 169,156	$ 165,698	[1]	$ 159,504	$ 165,754	[2]	$ 148,391	$ 154,419	$ 151,691	$ 685,173	$ 620,255	$ 540,506
Property, Plant and Equipment, Net	128,064					125,123					128,064	125,123
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net											620,363	575,255	511,310
Property, Plant and Equipment, Net	109,458					112,701					109,458	112,701
International [Domain]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net											64,810	45,000	29,196
Property, Plant and Equipment, Net	$ 18,606					$ 12,422					$ 18,606	$ 12,422

[1] Consolidated financial results include a one-time royalty expense charge of $7.9 million, accounting for the difference in using the Medtronic royalty rates stated in the September 2011 verdict and those in the June 2013 ruling on sales through March 31, 2013.

[2] Consolidated financial results include impairment charges of $8.3 million for Impulse Monitoring's goodwill and $1.4 million related to certain intangible assets.