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v3.8.0.1

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Statement [Abstract] |  |  |
Net sales | $ 977,025 | $ 860,661 | $ 794,059
Cost of sales | 530,761 | 448,211 | 435,140
Gross profit | 446,264 | 412,450 | 358,919
Operating expenses: |  |  |
Research and development and other engineering | 47,616 | 46,248 | 46,196
Selling | 114,903 | 98,343 | 90,663
General and administrative | 144,738 | 129,162 | 113,428
Net gain on disposal of assets | (160) | (780) | (389)
Total operating expenses | 307,097 | 272,973 | 249,898
Income from operations | 139,167 | 139,477 | 109,021
Loss in equity method investment, before tax | (86) | 0 | 0
Interest income | 389 | 570 | 655
Interest expense | (1,177) | (1,147) | (997)
Gain on bargain purchase of a business | (6,336) | 0 | 0
Loss on disposal of a business | (211) | 0 | 0
Income before taxes | 144,418 | 138,900 | 108,679
Provision for income taxes | 51,801 | 49,166 | 40,791
Net income | $ 92,617 | $ 89,734 | $ 67,888
Earnings per share of common stock: |  |  |
Basic (in USD per share) | $ 1.95 | $ 1.87 | $ 1.39
Diluted (in USD per share) | $ 1.94 | $ 1.86 | $ 1.38
Weighted average number of shares of common stock outstanding |  |  |
Basic (in shares) | 47,486 | 48,084 | 48,952
Diluted (in shares) | 47,774 | 48,295 | 49,181

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