XML 54 R20.htm IDEA: XBRL DOCUMENT

Workers' Compensation (Tables)

9 Months Ended

Sep. 30, 2012

Workers' Compensation [Abstract]

Summarizes aggregate workers' compensation reserve activity


		Three Months Ended September 30,								Nine Months Ended September 30,
		2012				2011				2012				2011
Beginning balance
Workers’ compensation claims liabilities		$	55,765			$	40,996			$	51,193			$	39,301

Add: claims expense accrual:
Current period			9,891				6,187				26,224				16,172
Prior periods			3,835				946				6,945				1,468

Total expense accrual			13,726				7,133				33,169				17,640


Less: claim payments related to:
Current period			2,207				1,736				3,790				2,955
Prior periods			5,656				3,058				18,944				10,651

Total paid			7,863				4,794				22,734				13,606


Ending balance
Workers’ compensation claims liabilities		$	61,628			$	43,335			$	61,628			$	43,335

Incurred but not reported (IBNR)		$	44,311			$	31,178			$	44,311			$	31,178