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Employee Benefits (Tables) | 9 Months Ended
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Sep. 30, 2018
Postemployment Benefits [Abstract] |
Summary of Workers' Compensation Known Claims and IBNR Reserves | Workers’ compensation known claims and IBNR reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands):
|  | September 30, |  |  | December 31, |
|  | 2018 |  |  | 2017 |
Included in other current liabilities |  | $ | 5,276 |  |  | $ | 5,899 |
Included in other long-term liabilities |  |  | 10,190 |  |  |  | 8,721 |
|  | $ | 15,466 |  |  | $ | 14,620 |
Schedule of Insurance Receivable for Claims | This receivable offsets an equal liability included within the reserve amounts noted above and was as follows (in thousands):
|  | September 30, |  |  | December 31, |
|  | 2018 |  |  | 2017 |
Included in other non-current assets |  | $ | 1,894 |  |  | $ | 1,826 |
Summary of Equity-based Awards for Employees | Amounts for each category of equity-based award for employees as of December 31, 2017 and changes during the nine months ended September 30, 2018 were as follows:
|  | Common Stock Awards |  |  | Performance-Based Stock Awards |  |  | Performance-Based Restricted Stock Units |
|  | Awards |  |  | Weighted Average Fair Market Value Per Share |  |  | Awards |  |  | Weighted Average Fair Market Value Per Share |  |  | Units |  |  | Weighted Average Fair Market Value Per Share |
Nonvested awards/units at December 31, 2017 |  |  | 202,331 |  |  | $ | 39.09 |  |  |  | 77,254 |  |  | $ | 41.00 |  |  |  | 72,000 |  |  | $ | 52.16 |
Granted |  |  | 65,112 |  |  |  | 57.51 |  |  |  | 52,892 |  |  |  | 65.60 |  |  |  | 14,072 |  |  |  | 55.92 |
Vested |  |  | (90,952 | ) |  |  | 36.10 |  |  |  | — |  |  |  | — |  |  |  | (71,120 | ) |  |  | 52.15 |
Forfeited/Cancelled |  |  | (2,010 | ) |  |  | 48.63 |  |  |  | (14,448 | ) |  |  | 41.00 |  |  |  | (1,564 | ) |  |  | 53.14 |
Nonvested awards/units at September 30, 2018 |  |  | 174,481 |  |  | $ | 47.42 |  |  |  | 115,698 |  |  | $ | 52.25 |  |  |  | 13,388 |  |  | $ | 56.05 |
Summary of Stock Compensation Expenses | During the three and nine months ended September 30, 2018 and 2017, we recorded the following stock compensation expense, by income statement category (in thousands):
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Cost of sales |  | $ | 94 |  |  | $ | 507 |  |  | $ | 749 |  |  | $ | 507 |
Selling |  |  | 30 |  |  |  | 292 |  |  |  | 402 |  |  |  | 292 |
Administrative |  |  | 1,769 |  |  |  | 1,380 |  |  |  | 4,938 |  |  |  | 3,950 |
|  | $ | 1,893 |  |  | $ | 2,179 |  |  | $ | 6,089 |  |  | $ | 4,749 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 + Details
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