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Workers' Compensation Claims (Tables) | 12 Months Ended
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Dec. 31, 2016
Text Block [Abstract] |
Summarizes Aggregate Workers' Compensation Reserve Activity | The following table summarizes the aggregate workers' compensation reserve activity (in thousands):
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Balance at January 1, |  |  |  |  |  |  |  |  |  |  |  |
Workers' compensation claims liabilities |  | $ | 255,675 |  |  | $ | 225,278 |  |  | $ | 121,056 |
Add: claims expense accrual |  |  |  |  |  |  |  |  |  |  |  |
Current year |  |  | 137,852 |  |  |  | 122,740 |  |  |  | 104,314 |
Prior years |  |  | (301 | ) |  |  | (13,683 | ) |  |  | 66,719 |
|  |  | 137,551 |  |  |  | 109,057 |  |  |  | 171,033 |
Less: claims payments related to |  |  |  |  |  |  |  |  |  |  |  |
Current year |  |  | 20,180 |  |  |  | 17,517 |  |  |  | 15,243 |
Prior years |  |  | 69,626 |  |  |  | 61,143 |  |  |  | 51,568 |
|  |  | 89,806 |  |  |  | 78,660 |  |  |  | 66,811 |
Add: claims incurred in excess of retention limits |  |  | 9,117 |  |  |  | — |  |  |  | — |
Balance at December 31, |  |  |  |  |  |  |  |  |  |  |  |
Workers' compensation claims liabilities |  | $ | 312,537 |  |  | $ | 255,675 |  |  | $ | 225,278 |
Incurred but not reported (IBNR) |  | $ | 158,169 |  |  | $ | 127,792 |  |  | $ | 113,984 |

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- Definition Workers compensation reserve activity. + References No definition available. + Details
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- References No definition available. + Details
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