BUSINESS ACQUISITIONS - Pro Forma Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013		Jun. 30, 2014	Jun. 30, 2013
Business Acquisition [Line Items]
Total revenue, net	$ 231,351	$ 205,547	[1]	$ 446,410	$ 402,199	[1]
Net income (loss)	4,825	1,520	[1]	7,031	(4,508)	[1]
Confluent Surgical, Inc.
Business Acquisition [Line Items]
Total revenue, net		221,946			434,997
Net income (loss)		$ 3,438			$ (2,032)

[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.