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			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013		Jun. 30, 2014	Jun. 30, 2013		Dec. 31, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold	$ 86,976	$ 81,829	[1]	$ 169,359	$ 161,441	[1]
Selling, general and administrative	115,253	103,280	[1]	223,591	206,243	[1]
Income tax expense (benefit)	2,361	(947)	[1]	4,130	(2,820)	[1]
Net income (loss)	4,825	1,520	[1]	7,031	(4,508)	[1]
Earnings Per Share, Basic	$ 0.15	$ 0.05	[1]	$ 0.22	$ (0.16)	[1]
Earnings Per Share, Diluted	$ 0.15	$ 0.05	[1]	$ 0.21	$ (0.16)	[1]
Comprehensive income (loss) (See Note 11)	4,752	3,397	[1]	7,957	(9,115)	[1]
Inventories, net	223,632			223,632			206,919	[1]
Deferred tax assets	48,349			48,349			48,616	[1]
Prepaid expenses and other current assets	36,758			36,758			26,858	[1]
Retained earnings	287,987			287,987			280,956	[1]
Increase (Decrease) in Inventories				(17,367)	(19,398)	[1]
Increase (Decrease) in Prepaid Expense and Other Assets				(2,832)	(1,294)	[1]
Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold		83,068			163,336
Selling, general and administrative		99,619			199,780
Income tax expense (benefit)		(445)			(2,150)
Net income (loss)		3,440			(610)
Earnings Per Share, Basic		$ 0.12			$ (0.02)
Earnings Per Share, Diluted		$ 0.12			$ (0.02)
Comprehensive income (loss) (See Note 11)		5,317			(5,217)
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					(23,966)
Increase (Decrease) in Prepaid Expense and Other Assets					(624)
Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold		(1,239)			(1,895)
Selling, general and administrative		3,661			6,463
Income tax expense (benefit)		(502)			(670)
Net income (loss)		(1,920)			(3,898)
Comprehensive income (loss) (See Note 11)		(1,920)			(3,898)
Inventories, net							(6,512)
Deferred tax assets							2,316
Prepaid expenses and other current assets							106
Retained earnings							(4,090)
Increase (Decrease) in Inventories					4,568
Increase (Decrease) in Prepaid Expense and Other Assets					$ (670)

[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.