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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Income Statement [Abstract]        
Total revenue, net $ 226,367 $ 197,523 $ 641,574 $ 577,643
Costs and expenses:        
Cost of goods sold 86,069 73,896 236,541 217,922
Research and development 13,938 11,134 37,029 33,549
Selling, general and administrative 113,424 93,788 306,007 283,057
Intangible asset amortization 2,942 1,598 6,418 4,839
Total costs and expenses 216,373 180,416 585,995 539,367
Operating income 9,994 17,107 55,579 38,276
Interest income 5 25 1 141
Interest expense (6,464) (5,912) (17,404) (16,436)
Other income (expense), net 1,827 (263) 2,984 203
Income from continuing operations before income taxes 5,362 10,957 41,160 22,184
Income tax expense 37,243 1,967 49,289 6,294
(Loss) income from continuing operations (31,881) 8,990 (8,129) 15,890
Income (loss) from discontinued operations (net of tax expense, (benefit)) 0 817 (10,370) 948
Net (loss) income $ (31,881) $ 9,807 $ (18,499) $ 16,838
Basic net income (loss) per share:        
Basic net income (loss) per common share from continuing operations (in dollars per share) $ (0.90) $ 0.28 $ (0.24) $ 0.49
Basic net income (loss) per common share from discontinued operations (in dollars per share) 0.00 0.03 (0.31) 0.03
Basic net income (loss) per common share (in dollars per share) (0.90) 0.31 (0.55) 0.52
Diluted net income per share:        
Diluted net income (loss) per common share from continuing operations (in dollars per share) (0.90) 0.27 (0.24) 0.48
Diluted net income (loss) per common share from discontinued operations (in dollars per share) 0.00 0.02 (0.31) 0.03
Diluted net income (loss) per common share (in dollars per share) $ (0.90) $ 0.29 $ (0.55) $ 0.51
Weighted average common shares outstanding (See Note 11):        
Basic (in shares) 35,279 32,450 33,682 32,374
Diluted (in shares) 35,279 32,906 33,682 32,844
Comprehensive income (loss) (See Note 12) $ (33,315) $ (7,181) $ (26,364) $ 645