GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) (USD $)	3 Months Ended			3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013	Mar. 31, 2014 Confluent Surgical, Inc.	Sep. 30, 2013 U.S. Spine And Other
Goodwill [Line Items]
Goodwill impairment loss					$ 46,700,000
Impairment of intangible assets	600,000	0		600,000
Annual amortization expense expected to approximate in 2014			30,900,000
Annual amortization expense expected to approximate in 2015			28,800,000
Annual amortization expense expected to approximate in 2016			26,500,000
Annual amortization expense expected to approximate in 2017			24,400,000
Annual amortization expense expected to approximate in 2018			$ 24,100,000