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v3.10.0.1

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenues: |  |  |
Total revenues | $ 940,698 | $ 920,432 | $ 840,586
Cost of revenues: |  |  |
Total cost of revenues | 754,025 | 761,901 | 695,050
Gross margin | 186,673 | 158,531 | 145,536
Selling, general and administrative expenses | 145,465 | 123,138 | 113,342
Depreciation and amortization | 4,219 | 5,452 | 3,253
Income from operations | 36,989 | 29,941 | 28,941
Other income (expense): |  |  |
Investment income, net | 9,077 | 4,668 | 956
Interest expense | (1,052) | (313) | (807)
Loss on litigation |  |  | (3,544)
Other, net | (245) | 82 | 40
Other income (expense), net | 7,780 | 4,437 | (3,355)
Income before income taxes | 44,769 | 34,378 | 25,586
Provision for income taxes | 6,707 | 9,208 | 6,787
Net income | $ 38,062 | $ 25,170 | $ 18,799
Basic income per common share | $ 5.18 | $ 3.46 | $ 2.60
Weighted average number of basic common shares outstanding | 7,342 | 7,275 | 7,226
Diluted income per common share | $ 4.98 | $ 3.33 | $ 2.55
Weighted average number of diluted common shares outstanding | 7,647 | 7,551 | 7,378
Professional Employer Service Fees [Member] |  |  |
Revenues: |  |  |
Total revenues | $ 793,399 | $ 758,046 | $ 673,924
Staffing Services [Member] |  |  |
Revenues: |  |  |
Total revenues | 147,299 | 162,386 | 166,662
Direct Payroll Costs [Member] |  |  |
Cost of revenues: |  |  |
Total cost of revenues | 111,443 | 122,533 | 126,753
Payroll Taxes and Benefits [Member] |  |  |
Cost of revenues: |  |  |
Total cost of revenues | 407,003 | 404,687 | 357,867
Workers' Compensation [Member] |  |  |
Cost of revenues: |  |  |
Total cost of revenues | $ 235,579 | $ 234,681 | $ 210,430

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