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v3.19.3.a.u2

Quarterly Financial Data (Unaudited) Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenues | $ 843,968 | $ 753,866 | $ 731,366 | $ 679,452 | $ 817,923 | $ 734,846 | $ 721,996 | $ 660,821 | $ 3,008,652 | $ 2,935,586 | $ 2,725,053
Gross profit | 498,298 | 435,056 | 419,538 | 388,319 | 477,566 | 419,254 | 412,625 | 374,933 | 1,741,211 | 1,684,378 | 1,575,751
Net earnings | $ 192,749 | $ 129,395 | $ 127,160 | $ 111,805 | $ 181,186 | $ 126,653 | $ 111,468 | $ 93,304 | $ 561,109 | $ 512,611 | $ 375,972
Basic earnings per common share: |  |  |  |  |  |  |  |  |  |  |
Net earnings | $ 7.95 | $ 5.28 | $ 5.15 | $ 4.50 | $ 7.25 | $ 5.04 | $ 4.41 | $ 3.66 | $ 22.84 | $ 20.33 | $ 14.62
Weighted average number of common shares | 24,241,383 | 24,487,268 | 24,698,032 | 24,851,340 | 24,975,303 | 25,126,061 | 25,299,414 | 25,468,323 | 24,567,609 | 25,215,674 | 25,713,575
Diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  |
Net earnings | $ 7.84 | $ 5.20 | $ 5.06 | $ 4.42 | $ 7.11 | $ 4.93 | $ 4.31 | $ 3.58 | $ 22.47 | $ 19.88 | $ 14.24
Weighted average number of common and common equivalent shares | 24,599,702 | 24,880,179 | 25,118,352 | 25,310,525 | 25,490,270 | 25,683,365 | 25,867,383 | 26,095,647 | 24,974,457 | 25,781,324 | 26,393,783
Market price per share: |  |  |  |  |  |  |  |  |  |  |
Common Stock Value During The Period Maximum | $ 793.31 | $ 872.45 | $ 840.00 | $ 729.72 | $ 645.33 | $ 617.94 | $ 595.14 | $ 692.30 |  |  |
Common Stock Value During The Period Mimimum | $ 658.61 | $ 642.84 | $ 701.80 | $ 513.56 | $ 524.03 | $ 559.44 | $ 546.43 | $ 566.87 |  |  |
Provisional one-time charge on US tax reform |  |  |  |  |  |  |  |  | $ 0 | $ 3,597 | $ 71,982
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  |  |  |  |  |  |  |  | $ 0 | (18,674) | $ 0
Loss Contingency Accrual |  |  |  |  | $ 3,000 |  |  |  |  | 3,000 |
BIOTIX [Member] |  |  |  |  |  |  |  |  |  |  |
Market price per share: |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  |  |  |  |  |  |  |  |  | $ 18,700 |

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