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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED) (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
Income Statement [Abstract] |  |  |  |  |  |
Total revenue, net | $ 231,351 | $ 205,547 | [1] | $ 446,410 | $ 402,199 | [1]
Costs and Expenses: |  |  |  |  |  |
Cost of goods sold | 86,976 | 81,829 | [1] | 169,359 | 161,441 | [1]
Research and development | 13,745 | 11,809 | [1] | 26,312 | 24,525 | [1]
Selling, general and administrative | 115,253 | 103,280 | [1] | 223,591 | 206,243 | [1]
Intangible asset amortization | 2,985 | 3,073 | [1] | 6,018 | 6,624 | [1]
Total costs and expenses | 218,959 | 199,991 | [1] | 425,280 | 398,833 | [1]
Operating income | 12,392 | 5,556 | [1] | 21,130 | 3,366 | [1]
Interest income | 58 | 289 | [1] | 120 | 352 | [1]
Interest expense | (5,382) | (4,965) | [1] | (10,524) | (9,765) | [1]
Other income (expense), net | 118 | (307) | [1] | 435 | (1,281) | [1]
Income (loss) before income taxes | 7,186 | 573 | [1] | 11,161 | (7,328) | [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]
Basic net income per common share (in dollars per share) | $ 0.15 | $ 0.05 | [1] | $ 0.22 | $ (0.16) | [1]
Diluted net income per common share (in dollars per share) | $ 0.15 | $ 0.05 | [1] | $ 0.21 | $ (0.16) | [1]
Weighted average common shares outstanding (See Note 10): |  |  |  |  |  |
Basic (in shares) | 32,398 | 27,873 | [1] | 32,336 | 27,834 | [1]
Diluted (in shares) | 32,804 | 28,118 | [1] | 32,796 | 27,834 | [1]
Comprehensive income (loss) (See Note 11) | $ 4,752 | $ 3,397 | [1] | $ 7,957 | $ (9,115) | [1]
[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.

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