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Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2012
Accounting Policies [Abstract]  
Activity and balances related to incurred but not paid workers' compensation claims
The following table provides the activity and balances related to incurred but not paid workers' compensation claims:

 
Six Months Ended June 30,
 
 
2012
 
 
2011
 
 
(in thousands)
 
 
 
 
 
 
 
Beginning balance, January 1,
 
$
104,791
 
 
$
96,934
 
Accrued claims
 
 
19,164
 
 
 
19,523
 
Present value discount
 
 
(532
)
 
 
(898
)
Paid claims
 
 
(15,179
)
 
 
(14,493
)
Ending balance
 
$
108,244
 
 
$
101,066
 
 
 
 
 
 
 
 
 
Current portion of accrued claims
 
$
44,580
 
 
$
41,331
 
Long-term portion of accrued claims
 
 
63,664
 
 
 
59,735
 
 
$
108,244
 
 
$
101,066