Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Estimated Useful Lives of Property and Equipment

Property and equipment are recorded at cost and are depreciated over the estimated useful lives of the related assets using the straight-line method.  The estimated useful lives of property and equipment for purposes of computing depreciation are as follows:

Buildings and improvements	5-30 years
Computer hardware and software, and acquired technologies	1-5 years
Software development costs	3 years
Furniture and fixtures	5-7 years
Aircraft	15-20 years

Activity and Balances Related to Incurred But Not Paid Worker's Compensation Claims

The following table provides the activity and balances related to incurred but not reported workers' compensation claims:

	Year ended December 31,
	2012			2011
	(in thousands)
Beginning balance	$	104,791		$	96,934
Accrued claims		37,772			36,845
Present value discount		(868	)		(1,513	)
Paid claims		(30,010	)		(27,475	)
Ending balance	$	111,685		$	104,791
Current portion of accrued claims	$	47,149		$	44,737
Long-term portion of accrued claims		64,536			60,054
	$	111,685		$	104,791