Workers' Compensation Claims (Tables)

6 Months Ended

Jun. 30, 2017

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Summarizes Aggregate Workers' Compensation Reserve Activity

The following table summarizes the aggregate workers’ compensation reserve activity (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2017			2016			2017			2016
Beginning balance
Workers' compensation claims liabilities	$	326,233		$	265,142		$	312,537		$	255,675
Add: claims expense accrual
Current period		37,878			34,627			73,153			65,781
Prior periods		2,350			(1,396	)		5,264			(548	)
		40,228			33,231			78,417			65,233
Less: claim payments related to
Current period		4,148			3,698			5,280			4,969
Prior periods		25,998			17,625			49,462			38,889
		30,146			21,323			54,742			43,858
Add: Change in claims incurred in excess of retention limits		(6,236	)		—			(6,133	)		—
Ending balance
Workers' compensation claims liabilities	$	330,079		$	277,050		$	330,079		$	277,050
Incurred but not reported (IBNR)	$	167,693		$	140,115		$	167,693		$	140,115