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Employee Benefits (Tables) | 9 Months Ended
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Sep. 30, 2019
Postemployment Benefits [Abstract] |
Summary of Workers' Compensation Known Claims and IBNR Reserves | Workers’ compensation kno w n claims and IBNR reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands):
|  | September 30, 2019 |  |  | December 31, 2018 |
Included in other current liabilities |  | $ | 5,768 |  |  | $ | 5,795 |
Included in other long-term liabilities |  |  | 11,813 |  |  |  | 9,447 |
|  | $ | 17,581 |  |  | $ | 15,242 |
Schedule of Insurance Receivable for Claims |
|  | September 30, 2019 |  |  | December 31, 2018 |
Included in other non-current assets |  | $ | 1,819 |  |  | $ | 1,888 |
Summary of Equity-based Awards for Employees | Amounts and changes for each category of equity-based award for employees were as follows:
|  | Common Stock Awards |  |  | Performance-Based Stock Awards |  |  | Performance-Based Restricted Stock Units |
|  | Awards |  |  | Weighted Average Grant Dat e Fair Value Per Share |  |  | Awards |  |  | Weighted Average Grant Dat e Fair Value Per Share |  |  | Units |  |  | Weighted Average Grant Dat e Fair Value Per Share |
Nonvested awards/units at December 31, 2018 |  |  | 173,189 |  |  | $ | 47.40 |  |  |  | 115,698 |  |  | $ | 52.25 |  |  |  | 13,248 |  |  | $ | 56.05 |
Granted |  |  | 88,529 |  |  |  | 50.94 |  |  |  | 82,692 |  |  |  | 45.65 |  |  |  | 13,933 |  |  |  | 51.62 |
Vested |  |  | (106,347 | ) |  |  | 42.27 |  |  |  | (31,404 | ) |  |  | 41.00 |  |  |  | (12,808 | ) |  |  | 56.05 |
Forfeited/Cancelled |  |  | (1,767 | ) |  |  | 52.25 |  |  |  | (6,697 | ) |  |  | 65.60 |  |  |  | (840 | ) |  |  | 53.94 |
Nonvested awards/units at September 30, 2019 |  |  | 153,604 |  |  | $ | 52.93 |  |  |  | 160,289 |  |  | $ | 50.49 |  |  |  | 13,533 |  |  | $ | 51.62 |
Summary of Stock Compensation Expenses | We recorded the following stock compensation expense by income statement category (in thousands):
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Cost of sales |  | $ | 97 |  |  | $ | 94 |  |  | $ | 280 |  |  | $ | 749 |
Selling |  |  | 48 |  |  |  | 30 |  |  |  | 149 |  |  |  | 402 |
Administrative |  |  | 1,954 |  |  |  | 1,769 |  |  |  | 6,012 |  |  |  | 4,938 |
|  | $ | 2,099 |  |  | $ | 1,893 |  |  | $ | 6,441 |  |  | $ | 6,089 |

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