SELECTED QUARTERLY INFORMATION - UNAUDITED (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total revenue, net	$ 368,602	$ 278,834	$ 282,164	$ 258,636	$ 255,664	$ 250,332	$ 249,309	$ 236,770	$ 1,188,236	$ 992,075	$ 882,734
Gross margin	220,431	177,077	183,166	172,051	170,242	161,003	159,744	151,997	752,725	642,986
Net income	$ 44,355	$ 3,159	$ 10,835	$ 6,394	$ 28,246	$ 20,144	$ 12,755	$ 13,419	$ 64,743	$ 74,564	$ (3,519)
Per Share-Basic (in dollars per share)	$ 0.57	$ 0.04	$ 0.14	$ 0.09	$ 0.38	$ 0.27	$ 0.17	$ 0.18	$ 0.84	$ 1.00	$ (0.05)
Per Share-Diluted (in dollars per share)	$ 0.56	$ 0.04	$ 0.14	$ 0.08	$ 0.35	$ 0.25	$ 0.16	$ 0.18	$ 0.82	$ 0.94	$ (0.05)
Tax benefit, re-measurement of net deferred tax liabilities, Tax Cuts and Jobs Act of 2017									$ 43,400
Codman Specialty Surgical | Disposal Group, Held-for-sale, Not Discontinued Operations
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gain on sale of business, included in other income, net									$ 2,600
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income, restated to reflect the effect of adoption							$ 1,800