Business Combinations - Progentix Noncontrolling Interest Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of equity (net assets) attributable to the noncontrolling interests
Noncontrolling interests at beginning of period	$ 10,003
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	403
Noncontrolling interests at end of period	0
Noncontrolling Interest in Variable Interest Entity	9,086	0
Progentix Orthobiology [Member]
Reconciliation of equity (net assets) attributable to the noncontrolling interests
Noncontrolling interests at beginning of period	10,003	10,705
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	(514)	(702)
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	403	0
Noncontrolling interests at end of period		10,003
Noncontrolling Interest in Variable Interest Entity	$ 9,086