BUSINESS ACQUISITIONS - Pro Forma Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Business Acquisition [Line Items]
Total revenue, net	$ 229,719	$ 213,246	[1]	$ 676,129	$ 615,445	[1]
Net income (loss)	9,807	(30,330)	[1]	16,838	(34,838)	[1]
Confluent Surgical, Inc.
Business Acquisition [Line Items]
Total revenue, net		229,645			664,642
Net income (loss)		$ (28,324)			$ (30,356)

[1] See Note 1 of these condensed consolidated financial statements for discussion of the impact of the change in accounting for the medical device excise tax.