Self-Insurance Accruals (Tables)

12 Months Ended

Dec. 31, 2013

Self-Insurance Accruals [Abstract]

Schedule of Self-Insurance Accruals [Table Text Block]

Components of our self-insurance accruals for workers’ compensation, vehicle liability and general liability follow:

	December 31,
	2013		2012
Workers' compensation	$	35,199	$	40,450
Present value discount	1,796		2,003
	33,403		38,447
Vehicle liability	4,885		5,117
General liability	18,424		18,169
Total	56,712		61,733
Less current portion	22,057		20,115
Noncurrent portion	$	34,655	$	41,618

Schedule of Changes in Self-Insurance Accruals [Table Text Block]

The changes in our self-insurance accruals and the discount rate used for the workers’ compensation accrual are summarized in the table below.

	December 31,
	2013			2012
Balance, beginning of year	$	61,733		$	57,265
Provision for claims	27,084			29,590
Payment of claims	32,105			25,122
Balance, end of year	$	56,712		$	61,733
Workers' compensation discount rate	2.00		%	1.90		%