BASIS OF PRESENTATION - Schedule of New Accounting Pronouncements and Changes in Accounting Principles (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013		Dec. 31, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold	$ 85,974	$ 81,767	[1]	$ 255,333	$ 243,208	[1]
Selling, general and administrative	109,896	99,794	[1]	333,487	306,037	[1]
Income tax expense (benefit)	1,736	(6,352)	[1]	5,866	(9,172)	[1]
Net income (loss)	9,807	(30,330)	[1]	16,838	(34,838)	[1]
Earnings Per Share, Basic	$ 0.30	$ (1.09)	[1]	$ 0.52	$ (1.25)	[1]
Earnings Per Share, Diluted	$ 0.30	$ (1.09)	[1]	$ 0.51	$ (1.25)	[1]
Comprehensive income (loss) (See Note 11)	(6,364)	(21,640)	[1]	1,593	(30,754)	[1]
Inventories, net	230,455			230,455			206,919	[1]
Deferred tax assets	44,276			44,276			48,616	[1]
Prepaid expenses and other current assets	26,886			26,886			26,858	[1]
Retained earnings	297,794			297,794			280,956	[1]
Increase (Decrease) in Inventories				(26,648)	(28,765)	[1]
Increase (Decrease) in Prepaid Expense and Other Assets				6,628	(694)	[1]
Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold		84,101			247,437
Selling, general and administrative		95,933			295,713
Income tax expense (benefit)		(6,605)			(8,755)
Net income (loss)		(28,550)			(29,160)
Earnings Per Share, Basic		$ (1.02)			$ (1.05)
Earnings Per Share, Diluted		$ (1.02)			$ (1.05)
Comprehensive income (loss) (See Note 11)		(19,860)			(25,076)
Inventories, net							213,431
Deferred tax assets							46,300
Prepaid expenses and other current assets							26,752
Retained earnings							285,046
Increase (Decrease) in Inventories					(34,855)
Increase (Decrease) in Prepaid Expense and Other Assets					(282)
Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold		(2,334)			(4,229)
Selling, general and administrative		3,861			10,324
Income tax expense (benefit)		253			(417)
Net income (loss)		(1,780)			(5,678)
Comprehensive income (loss) (See Note 11)		(1,780)			(5,678)
Inventories, net							(6,512)
Deferred tax assets							2,316
Prepaid expenses and other current assets							106
Retained earnings							(4,090)
Increase (Decrease) in Inventories					6,090
Increase (Decrease) in Prepaid Expense and Other Assets					$ (412)

[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.