Business Combinations (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Components of total assets and liabilities of Progentix
Noncontrolling Interest in Variable Interest Entity	$ 8,648	$ 9,086
Progentix Orthobiology [Member]
Components of total assets and liabilities of Progentix
Variable Interest Entity Consolidated Carrying Amount Current Assets Net	549	580
Variable Interest Entity Consolidated Carrying Amount Finite And Indefinite Lived Intangible Assets Net	14,169	14,403
Variable Interest Entity Consolidated Carrying Amount Goodwill	12,654	12,654
Variable Interest Entity Consolidated Carrying Amount Other Long Term Assets Net	4	7
Variable Interest Entity Consolidated Carrying Amount Current Liabilities Net	522	403
Variable Interest Entity Consolidated Carrying Amount Deferred Tax Liabilities Net	$ 2,770	$ 2,770