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Employee Benefits (Tables) | 6 Months Ended
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Jun. 30, 2017
Summary of Workers' Compensation Known Claims and IBNR Reserves | Workers’ compensation expense totaled $2.6 million and $2.8 million for the three months ended June 30, 2017 and 2016, respectively, and $6.7 million and $5.8 million for the six months ended June 30, 2017 and 2016, respectively. Workers’ compensation known claims and IBNR reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands):
|  | June 30, |  |  | December 31, |
|  | 2017 |  |  | 2016 |
Included in other current liabilities |  | $ | 5,650 |  |  | $ | 4,595 |
Included in other long-term liabilities |  |  | 7,002 |  |  |  | 7,052 |
|  | $ | 12,652 |  |  | $ | 11,647 |
Schedule of Insurance Receivable for Claims | That receivable offsets an equal liability included within the reserve amounts noted above and was as follows (in thousands):
|  | June 30, |  |  | December 31, |
|  | 2017 |  |  | 2016 |
Included in other non-current assets |  | $ | 1,826 |  |  | $ | 1,249 |
Summary of Nonvested Common Stock Awards and Changes During Period | Nonvested common stock awards for employees as of December 31, 2016 and changes during the six months ended June 30, 2017 were as follows:
|  | Common Stock Awards |  |  | Weighted Average Grant Date Fair Market Value Per Share |
Nonvested common stock awards at December 31, 2016 |  |  | 161,174 |  |  | $ | 26.36 |
Granted |  |  | 101,241 |  |  |  | 52.00 |
Vested |  |  | (57,816 | ) |  |  | 26.30 |
Forfeited |  |  | (1,157 | ) |  |  | 31.13 |
Nonvested common stock awards at June 30, 2017 |  |  | 203,442 |  |  | $ | 39.11 |
Performance Based Awards [Member] |
Summary of Nonvested Performance-Based Stock Awards/Units and Changes During Period | Nonvested performance-based stock awards for employees as of December 31, 2016 and changes during the six months ended June 30, 2017 were as follows:
|  | Performance- Based Stock Awards |  |  | Weighted Average Fair Market Value Per Share |
Nonvested performance-based stock awards at December 31, 2016 |  |  | — |  |  | $ | — |
Granted |  |  | 77,254 |  |  |  | 41.00 |
Vested |  |  | — |  |  |  | — |
Cancelled |  |  | — |  |  |  | — |
Nonvested performance-based stock awards at June 30, 2017 |  |  | 77,254 |  |  | $ | 41.00 |
Performance Based Restricted Stock Units [Member] |
Summary of Nonvested Performance-Based Stock Awards/Units and Changes During Period | Nonvested performance-based stock units for employees as of December 31, 2016 and changes during the six months ended June 30, 2017 were as follows:
|  | Performance- Based Stock Units |  |  | Weighted Average Fair Market Value Per Share |
Nonvested performance-based stock units at December 31, 2016 |  |  | — |  |  | $ | — |
Granted |  |  | 72,274 |  |  |  | 52.00 |
Vested |  |  | — |  |  |  | — |
Cancelled |  |  | (471 | ) |  |  | 52.00 |
Nonvested performance-based stock units at June 30, 2017 |  |  | 71,803 |  |  | $ | 52.00 |

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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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