Consolidated Statements Of Cash Flows (Parenthetical) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash paid (received) during the period for:
Interest	$ 25,406	$ 24,885
Income taxes		(1,948)
Non-cash interest expense	808
Increase in lease financing with BioMed	$ 1,227	$ 1,449
Interest rate of convertible subordinated notes	2.25%